SAN MATEO, CA INTERNET
Find internet providers in San Mateo, CA
Find internet offered in San Mateo, CA – easily compare options from multiple providers to find the plan that best fits your needs.
We analyzed 40 census tracts and 5 ZIP codes across San Mateo using our Speed Score methodology to find you the best internet options. For most residents, AT&T, Xfinity, and Astound Broadband offer the broadest coverage, though providers like Sonic.net, Starlink, and Verizon work well for specific addresses. Unlike other sites, we rank by actual serviceability and real data—not by who pays us the highest commission.—The FindBetterInternet Team
Shop and compare 11 internet providers for San Mateo, CA
The 30-Second Verdict
UpdatedFiber is where you want to start here, and AT&T is the big name, with fiber reaching about 59 percent of the city at speeds up to a blistering 5000/5000 Mbps. That symmetrical bandwidth is genuine overkill for casual users but a dream for heavy work-from-home setups, big file uploads, and competitive gaming. Sonic.net is the wildcard, covering about 11 percent of the city with fiber that tops out at an astonishing 10000/10000 Mbps, and it dominates pockets of Hillsdale (94403), where it wins over 41 percent of addresses. Over in Baywood (94402), AT&T fiber rules with more than 70 percent of the ZIP. For most folks, though, cable is the smarter, cheaper call: Xfinity covers about 83 percent of the city and hits up to 2000/300 Mbps, plenty for streaming, browsing, and video calls, with Astound reaching around 65 percent on cable too. Ask yourself if you really need multi-gig fiber. Fixed wireless from T-Mobile or Verizon is a fine budget backup, and if neither fiber nor cable reaches your exact address, Starlink satellite is the fallback. Coverage shifts street to street, so confirm your address, and if you’re renting near College of San Mateo, verify the unit itself is actually wired for fiber.
Speed Score: Faster than 98% of all internet options in California
SPEED SCORE
Local data shows excellent speeds for your area
This score is based on local bandwidth data and indicates this provider offers some of the best speeds available in your area.
The calculated local speed score is based on real-world data showing average speeds in your area. Speed Score’s are not static and fluctuate based on the location being checked for serviceability. Average speeds within a ZIP Code may not be reflective of your specific location. Enter your full address to access the most accurate speed score.
EST. CAPABILITIES
Excellent
Excellent
Excellent
Excellent
THE TAKEAWAY
Our recommendation for San Mateo
If you can get AT&T fiber at your address, it’s a top-tier choice—plans reach up to 5,000↓/5,000↑ Mbps with an outstanding 98/100 speed score, well above San Mateo’s 65 average and ideal for heavy streaming, gaming, and working from home. Fiber availability is limited to roughly 59% of the city, so check your specific address first. If you’re only served by AT&T’s copper/DSL or fixed wireless (speed scores ranging from 3 to 58), performance is far more limited, and it’s worth comparing what other technologies are available at your location before committing.
About AT&T
AT&T is an excellent choice in San Mateo if their fiber service is available at your address—nearly 60% of the area can access their blazing-fast 5000 Mbps fiber plan (Speed Score: 98/100). However, if fiber isn’t available, you’ll likely be stuck with slower copper/DSL options (mostly scoring below 52/100) or basic fixed wireless that may struggle with modern streaming and work-from-home needs. Definitely check if fiber is available at your specific address first, as there’s a huge quality gap between AT&T’s fiber and non-fiber options.
Available Plans
Fiber
Licensed Fixed Wireless
Copper
Copper
Copper
Fiber
Copper
Copper
Licensed Fixed Wireless
Speeds may vary based on location and network conditions. AT&T Fiber plans: No annual contract, no data caps, symmetrical upload/download speeds. AT&T Internet Air (wireless): Speeds typically 40-140 Mbps. Equipment fee of $10/mo applies unless using customer-owned equipment where eligible. Autopay & paperless billing required for advertised pricing; without autopay, additional $10/mo charge applies. Limited availability – service and speeds not available in all areas. Internet speed claims represent maximum wired network service capability speeds and actual customer speeds may vary. Installation fees may apply. Early termination fees may apply to fixed wireless services. Additional terms apply.
Speed Score: Faster than 94% of all internet options in California
SPEED SCORE
Local data shows excellent speeds for your area
This score is based on local bandwidth data and indicates this provider offers some of the best speeds available in your area.
The calculated local speed score is based on real-world data showing average speeds in your area. Speed Score’s are not static and fluctuate based on the location being checked for serviceability. Average speeds within a ZIP Code may not be reflective of your specific location. Enter your full address to access the most accurate speed score.
EST. CAPABILITIES
Excellent
Excellent
Excellent
Excellent
THE TAKEAWAY
Our recommendation for San Mateo
Xfinity covers 99% of San Mateo, and its cable service is a strong pick—the top plan delivers blazing 2000↓/300↑ Mbps speeds with an excellent Speed Score of 94/100, well above the city average of 65. Most addresses will land on this cable network (reaching about 83% of the city), which is more than capable for streaming, gaming, and heavy multi-device households. If your address happens to fall within Xfinity’s limited fiber footprint, you’ll get comparable 2000 Mbps download speeds with the added benefit of symmetrical or lower-latency performance, making it an equally top-tier option. Either way, Xfinity ranks among the fastest choices available here.
About Xfinity
Xfinity is an excellent choice for most San Mateo residents, with nearly universal coverage (99%) and impressive cable speeds up to 2000 Mbps available to over 80% of the area. Their cable plans offer top-tier speeds (scoring 89-94/100 in the state), making them great for streaming, gaming, and working from home, though fiber availability is extremely limited at under 1% coverage. You can confidently check if Xfinity serves your address, as their widespread cable network should handle all your household’s internet needs.
Available Plans
Cable
Cable
Fiber
Fiber
Fiber
Speeds may vary and are not guaranteed. Actual speeds vary based on device, connection, and other factors. Early termination fees may apply. Equipment rental fees typically $15/mo unless customer-owned modem used. 1.2 TB monthly data plan included; unlimited data available for additional fee. Installation fees may apply. Pricing for new customers only; rates increase after promotional period. Service subject to availability and may require credit check. Additional fees including Broadcast TV fee, Regional Sports fee, and other surcharges may apply to bundled services.
Speed Score: Faster than 94% of all internet options in California
SPEED SCORE
Local data shows excellent speeds for your area
This score is based on local bandwidth data and indicates this provider offers some of the best speeds available in your area.
The calculated local speed score is based on real-world data showing average speeds in your area. Speed Score’s are not static and fluctuate based on the location being checked for serviceability. Average speeds within a ZIP Code may not be reflective of your specific location. Enter your full address to access the most accurate speed score.
EST. CAPABILITIES
Excellent
Excellent
Excellent
Excellent
THE TAKEAWAY
Our recommendation for San Mateo
If you can get Astound Broadband’s fiber at your San Mateo address, it’s a top-tier option delivering blazing 1500↓/1500↑ Mbps with a 94/100 speed score—well above the city’s average of 65 and ideal for heavy uploads, video calls, and low-latency gaming. Since fiber only reaches about 2.2% of the city, most homes will land on Astound’s cable service, which is still a solid choice at 1500↓/50↑ Mbps and a strong 90/100 score for streaming, browsing, and everyday use. If you’re limited to their copper service (1000↓/10↑ Mbps, 80/100), it remains capable but offers far less upload headroom, so it’s worth confirming which technology is actually available before you commit.
About Astound Broadband
Astound Broadband is available to about two-thirds of San Mateo residents and offers excellent cable internet with speeds up to 1500 Mbps to most of their coverage area (65.4%), earning a strong 90/100 speed score. A small percentage of addresses may only qualify for their slower copper service (1000/10 Mbps), so if you’re in that group, you’ll want to verify whether the asymmetric speeds meet your needs, especially for video calls or uploading content. Overall, if their high-speed cable is available at your address, Astound is a solid choice with top-tier speeds.
Available Plans
Cable
Copper
Fiber
Speeds may vary based on network conditions and device capabilities. Installation fees may apply (typically $50-$100 for professional installation, self-install may be available). Equipment rental fees typically $10-$15/mo unless customer-owned modem used. Early termination fees may apply if service is cancelled before end of promotional period. No annual data caps on most plans. Advertised speeds are maximum wired speeds; actual wireless speeds will vary. Service availability and pricing varies by market (operates in California, Illinois, Indiana, Maryland, Massachusetts, Oregon, Pennsylvania, Texas, Virginia, Washington, and West Virginia). New customers only for promotional pricing. Credit check may be required. Taxes, fees, and surcharges apply and are not included in advertised pricing.
Sonic.net
Speeds up to 10000 Mbps
Plans start at $40 /mo *
Speed Score: Faster than 100% of all internet options in California
SPEED SCORE
Local data shows excellent speeds for your area
This score is based on local bandwidth data and indicates this provider offers some of the best speeds available in your area.
The calculated local speed score is based on real-world data showing average speeds in your area. Speed Score’s are not static and fluctuate based on the location being checked for serviceability. Average speeds within a ZIP Code may not be reflective of your specific location. Enter your full address to access the most accurate speed score.
EST. CAPABILITIES
Excellent
Excellent
Excellent
Excellent
THE TAKEAWAY
Our recommendation for San Mateo
If you can get Sonic.net fiber at your San Mateo address, it’s a top-tier choice—their 100% fiber network delivers symmetrical speeds up to a blazing 10,000 Mbps (Speed Score 100/100), with a more widely available 1,000/1,000 Mbps tier (Score 91/100) that still sits well above the city’s average score of 65. Both plans offer the low latency and matched upload/download speeds that make fiber ideal for streaming, gaming, video calls, and working from home. The main caveat is availability: Sonic.net reaches about 36% of the city, so check whether service is offered at your specific location before counting on it.
About Sonic.net
Sonic.net offers excellent fiber internet in San Mateo, covering 36% of the area with speeds ranging from 1 Gbps to an impressive 10 Gbps (both scoring in the top tier statewide). If fiber is available at your address, Sonic is a fantastic choice with symmetrical upload/download speeds perfect for working from home, streaming, and gaming. However, since coverage is limited to about a third of San Mateo, you’ll want to check availability at your specific address first.
Available Plans
Fiber
Fiber
Speeds: Fiber speeds up to 10 Gbps available in select areas; actual speeds may vary based on location and technology (Fiber, Fixed Wireless, DSL). No data caps on any plans. No contracts required – month-to-month service available. Equipment: Router included with fiber service at no additional charge. Installation fees may apply depending on service type. Price lock guarantee – residential internet prices won’t increase while you remain a customer. Some areas may have limited availability. Service subject to qualification and availability at service address.
Speed Score: Faster than 69% of all internet options in California
SPEED SCORE
Local data shows below average speeds for your area
This score is based on local bandwidth data and is an indicator that there are better options in your area.
The calculated local speed score is based on real-world data showing average speeds in your area. Speed Score’s are not static and fluctuate based on the location being checked for serviceability. Average speeds within a ZIP Code may not be reflective of your specific location. Enter your full address to access the most accurate speed score.
EST. CAPABILITIES
Adequate
Poor
Poor
Adequate
THE TAKEAWAY
Our recommendation for San Mateo
Starlink’s satellite service reaches 100% of San Mateo with download speeds around 220 Mbps and uploads near 30 Mbps, earning a speed score of 69 that sits just below the city average of 65’s higher-performing tiers. As a satellite technology, it delivers reliable coverage everywhere but comes with higher latency than wired connections, which can affect gaming and video calls. Since San Mateo is well-served by faster fiber and cable options, it’s worth checking what wired technologies are available at your specific address before committing. Starlink remains a strong pick if you need coverage in a spot where those wired services don’t reach.
About Starlink
Starlink offers satellite internet with 220 Mbps download speeds across 100% of San Mateo, earning a speed score of 69/100—which is just below average for the state. While these speeds are adequate for most everyday tasks, satellite internet comes with higher latency that can impact video calls and gaming, so you should first check if faster fiber or cable options are available at your specific address. If traditional providers don’t reach your location, Starlink can be a solid backup option for rural or underserved areas.
Available Plans
Ngso Satellite
Speeds: 25-100 Mbps download typical, with brief periods of higher speeds up to 220 Mbps. Upload speeds 5-10 Mbps typical. Speeds vary based on location, time of day, and network congestion. Latency 25-60ms typical. No data caps. No contracts – cancel anytime. One-time hardware purchase of $599 for standard dish and router (or $12/mo financing available in some areas). $50 shipping and handling fee. Service requires clear view of sky. 30-day trial period – full refund if returned within 30 days. Best effort service – speeds not guaranteed. Network management during congestion may prioritize certain traffic types. Monthly service fee subject to change.
Speed Score: Faster than 81% of all internet options in California
SPEED SCORE
Local data shows excellent speeds for your area
This score is based on local bandwidth data and indicates this provider offers some of the best speeds available in your area.
The calculated local speed score is based on real-world data showing average speeds in your area. Speed Score’s are not static and fluctuate based on the location being checked for serviceability. Average speeds within a ZIP Code may not be reflective of your specific location. Enter your full address to access the most accurate speed score.
EST. CAPABILITIES
Good
Adequate
Adequate
Good
THE TAKEAWAY
Our recommendation for San Mateo
Verizon reaches about 45.8% of San Mateo exclusively through licensed fixed wireless, with plans topping out at 1000/75 Mbps (Speed Score 81) in select areas. If your address qualifies for that gigabit tier or the more widely available 300/20 Mbps plan (Speed Score 78), you’ll get above-average performance that beats the city’s 65 average—though fixed wireless can be more sensitive to signal and congestion than a wired connection. Check your specific address first, since availability varies widely across these tiers, and if you’re only eligible for the 50/5 Mbps plan (Speed Score 44), it’s worth comparing the wired options at your location before committing.
About Verizon
Verizon covers about 46% of San Mateo through fixed wireless technology, which can be adequate but may have reliability issues compared to fiber or cable. Their best plan offers 1000/75 Mbps with excellent speeds (score: 81), but it’s only available in about 7% of the area, while most coverage areas get their 300/20 Mbps plan with good speeds (score: 78). Before choosing Verizon, I’d recommend checking if fiber or cable providers serve your address first, as those technologies typically offer more consistent performance for modern internet needs.
Available Plans
Licensed Fixed Wireless
Licensed Fixed Wireless
Licensed Fixed Wireless
Speeds: Fios speeds are wired and based on maximum wired speed to your router. Actual speeds may vary. 5G Home Internet speeds vary with location and conditions. Fees: Monthly equipment charges may apply; router purchase option available. One-time setup/activation fees may apply. Contracts: Generally no annual contract required; month-to-month service available. Data: No data caps on Fios plans. Early termination: If promotional pricing applied, early termination may result in charges. Availability varies by address. Additional taxes, fees, and surcharges apply.
Unwired Ltd
Speeds up to 300 Mbps
Speed Score: Faster than 79% of all internet options in California
SPEED SCORE
Local data shows average speeds for your area
This score is based on local bandwidth data and indicates this provider offers competitive speeds in your area.
The calculated local speed score is based on real-world data showing average speeds in your area. Speed Score’s are not static and fluctuate based on the location being checked for serviceability. Average speeds within a ZIP Code may not be reflective of your specific location. Enter your full address to access the most accurate speed score.
EST. CAPABILITIES
Good
Adequate
Adequate
Good
THE TAKEAWAY
Our recommendation for San Mateo
Unwired Ltd offers licensed fixed wireless in San Mateo with plans reaching 300↓/25↑ Mbps and a speed score of 79/100, which lands above the city’s average of 65 and makes it a competitive option where available. Since it covers about 18.7% of the city, check whether service reaches your specific address first. Fixed wireless is a solid choice for everyday browsing, streaming, and remote work, though if you have demanding upload needs or want the lowest latency, it’s worth confirming whether fiber or cable is also available at your location.
About Unwired Ltd
Unwired Ltd offers fixed wireless internet with decent speeds (300 Mbps download) that score slightly better than average for San Mateo, but they’re only available to about 19% of the area. Fixed wireless can be adequate for most households, though it may experience occasional reliability issues compared to fiber or cable. If you’re in their coverage area and don’t have access to fiber or cable options, Unwired could work for you, but check for those faster, more stable technologies first.
Available Plans
Licensed Fixed Wireless
Speed Score: Faster than 58% of all internet options in California
SPEED SCORE
Local data shows below average speeds for your area
This score is based on local bandwidth data and is an indicator that there are better options in your area.
The calculated local speed score is based on real-world data showing average speeds in your area. Speed Score’s are not static and fluctuate based on the location being checked for serviceability. Average speeds within a ZIP Code may not be reflective of your specific location. Enter your full address to access the most accurate speed score.
EST. CAPABILITIES
Good
Adequate
Adequate
Good
THE TAKEAWAY
Our recommendation for San Mateo
T-Mobile covers about 80.8% of San Mateo with licensed fixed wireless, delivering up to 100↓/20↑ Mbps at a speed score of 58/100—below the city’s average of 65, which reflects the inherent limits of wireless compared to wired options. This plan can handle everyday browsing, streaming, and video calls, but performance may vary based on signal strength and network congestion at your specific address. Since San Mateo has 4 fiber and 2 cable providers available, it’s worth checking whether a wired connection is offered at your location if you need consistently higher speeds and lower latency. If fixed wireless is your best or most convenient fit, T-Mobile is a reasonable choice for lighter internet use.
About T-Mobile
T-Mobile offers Licensed Fixed Wireless service to about 80% of San Mateo, but with below-average speeds (39-58 speed scores) that may struggle with modern internet needs like streaming, video calls, or multiple users. Fixed wireless can also be affected by weather and signal interference, making it less reliable than fiber or cable options. Before choosing T-Mobile, I’d recommend checking if faster providers with fiber or cable service are available at your address, as those would likely serve you better.
Available Plans
Licensed Fixed Wireless
Licensed Fixed Wireless
Speeds typically 72-245 Mbps, some locations may receive 5G service with speeds up to 245+ Mbps. Actual speeds vary based on location, network conditions, and device capabilities. No annual contracts, no data caps, no equipment fees. Price Lock guarantee for existing customers on eligible plans. AutoPay discount required using eligible payment method (bank account or debit card). Credit check required. Service availability and speeds depend on cellular network coverage in your area. Not available in all areas. Taxes and fees additional.
Speed Score: Slower than 71% of all internet options in California
SPEED SCORE
Local data shows below average speeds for your area
This score is based on local bandwidth data and is an indicator that there are better options in your area.
The calculated local speed score is based on real-world data showing average speeds in your area. Speed Score’s are not static and fluctuate based on the location being checked for serviceability. Average speeds within a ZIP Code may not be reflective of your specific location. Enter your full address to access the most accurate speed score.
EST. CAPABILITIES
Poor
Poor
Poor
Poor
THE TAKEAWAY
Our recommendation for San Mateo
HughesNet delivers satellite internet with 100↓/5↑ Mbps across all of San Mateo, so availability isn’t an issue—but its speed score of 29/100 falls well below the city average of 65, and satellite’s high latency makes it a poor fit for video calls, gaming, or streaming-heavy households. Since San Mateo is served by 11 providers, including four with fiber and two with cable, we’d strongly recommend checking what wired options are available at your specific address first. HughesNet is best viewed as a fallback for locations where faster ground-based service simply isn’t reachable.
About HughesNet
HughesNet offers satellite internet with 100% coverage in San Mateo, but with a speed score of only 29/100, it’s significantly slower than most other options in the state. Satellite internet also comes with high latency that makes video calls and gaming difficult, so you should definitely check if faster options like fiber or cable are available at your address first. HughesNet works best as a last-resort option for locations where no other providers offer service.
Available Plans
Gso Satellite
Satellite internet service with download speeds up to 25 Mbps and upload speeds up to 3 Mbps. All plans include data allowances (15-200 GB/month depending on plan) with reduced speeds after cap is reached. Bonus Zone (2AM-8AM) offers additional data. 24-month service commitment required; early termination fees apply up to $400. Equipment lease fee included in monthly price. Professional installation required ($100-$150 fee may apply). Weather and line-of-sight conditions may affect service quality. Not available in all areas. Actual speeds may vary and are not guaranteed.
Speed Score: Slower than 84% of all internet options in California
SPEED SCORE
Local data shows below average speeds for your area
This score is based on local bandwidth data and is an indicator that there are better options in your area.
The calculated local speed score is based on real-world data showing average speeds in your area. Speed Score’s are not static and fluctuate based on the location being checked for serviceability. Average speeds within a ZIP Code may not be reflective of your specific location. Enter your full address to access the most accurate speed score.
EST. CAPABILITIES
Poor
Poor
Poor
Poor
THE TAKEAWAY
Our recommendation for San Mateo
Viasat’s satellite service covers 100% of San Mateo and delivers download speeds up to 100 Mbps, making it a reliable fallback wherever wired options don’t reach. That said, its speed score of 16/100 sits well below the city average of 65, and satellite technology carries inherently high latency that can strain video calls, gaming, and other real-time uses. Since San Mateo is well-served by faster wired technologies—including fiber and cable at many addresses—it’s worth checking what else is available at your specific location before committing. If those options don’t reach your home, Viasat remains a solid choice for staying connected.
About Viasat Inc
Viasat Inc offers satellite internet coverage across 100% of San Mateo, but with download speeds of 100 Mbps and only 3 Mbps upload (scoring just 16/100 in the state), this is a below-average option that should really only be considered as a last resort. Satellite internet typically comes with high latency that makes video calls and gaming difficult, plus the very slow upload speeds will be frustrating for common tasks like sharing photos or video conferencing. I’d strongly recommend checking if faster cable or fiber providers are available at your address first, and only turn to Viasat if you have no other options.
Available Plans
Gso Satellite
24-month minimum service term required with early termination fees up to $400. Speeds may vary based on location, network conditions, and time of day. Installation fee typically $99-$299. Equipment lease fee of $13/mo or purchase option available. Data plans include priority data allowances (ranging from 40GB to 300GB depending on plan); after priority data is exhausted, speeds may be reduced during network congestion. Actual speeds may be lower than advertised maximum speeds. Service requires clear view of southern sky for satellite dish installation. Credit check required. Standard rates apply after promotional period ends, typically $69.99-$199.99/mo depending on plan. Some plans subject to data caps with additional fees for overage or speed throttling.
Viasat Carrier Services Inc
Speeds up to 25 Mbps
Plans start at $49.99 /mo *
Speed Score: Slower than 100% of all internet options in California
SPEED SCORE
Local data shows below average speeds for your area
This score is based on local bandwidth data and is an indicator that there are better options in your area.
The calculated local speed score is based on real-world data showing average speeds in your area. Speed Score’s are not static and fluctuate based on the location being checked for serviceability. Average speeds within a ZIP Code may not be reflective of your specific location. Enter your full address to access the most accurate speed score.
EST. CAPABILITIES
Poor
Poor
Poor
Poor
THE TAKEAWAY
Our recommendation for San Mateo
Viasat’s Gso Satellite service in San Mateo delivers 25↓/3↑ Mbps, and as a satellite technology it comes with high latency and limited performance that make it best suited for basic browsing rather than streaming, gaming, or video calls. With a speed score of 0 against a city average of 65, this option falls well below what’s typical in the area. San Mateo is served by 11 providers—including four with fiber and two with cable—so it’s worth checking your specific address for faster, lower-latency alternatives before committing.
About Viasat Carrier Services Inc
Viasat Carrier Services Inc offers only satellite internet in San Mateo with very slow speeds of 25 Mbps download and 3 Mbps upload, which scores 0/100 in the state and has extremely limited coverage at just 0.4% of census blocks. Satellite internet also comes with high latency that makes it unsuitable for video calls, gaming, or streaming. You should definitely check if other providers offer fiber, cable, or even DSL service at your address first, as nearly any other technology would provide a better internet experience.
Available Plans
Gso Satellite
Speeds may vary based on location, network conditions, and number of users. 24-month minimum service term required with early termination fees up to $300. Monthly data allowance varies by plan (typically 40GB-300GB); speeds reduced to 1-5 Mbps after data limit reached. Installation fee typically $99-$299. Monthly equipment lease fee $10-$13. Actual speeds may be lower than advertised due to factors including congestion, weather, and satellite connectivity. Subject to Viasat Internet Service Agreement and Acceptable Use Policy. Prices subject to change.
Compare San Mateo providers head-to-head
See how San Mateo’s providers stack up against each other — speed, coverage, price, and who wins block by block.
Best Fit by Household Type in San Mateo
Best Fit
Students & Roommates
Sonic.net's 10 Gbps fiber near College of San Mateo in Hillsdale offers unbeatable shared bandwidth.
Hillsdale ZIP 94403 has 41% Sonic.net fiber coverage with symmetrical 10000/10000 Mbps speeds.
Check first: Sonic.net only reaches 11% citywide; verify exact address availability before committing to lease.
Best Fit
Remote Workers
AT&T fiber delivers 5000/5000 Mbps symmetrical speeds across 59% of San Mateo residences.
Upload speeds match downloads—critical for video calls.
Check first: Remaining AT&T areas get only 100/20 copper; confirm fiber availability at your address.
Best Fit
Gamers & Streamers
Xfinity's 2000/300 Mbps cable reaches 83% of San Mateo with low-latency wired connectivity.
Widest fast-tier coverage in city; strong presence in Hayward Park and ZIP 94404 areas.
Check first: Upload capped at 300 Mbps; streamers uploading 4K content should prioritize AT&T fiber zones.
Best Fit
Rural & Edge-of-City Homes
Starlink provides 220/30 Mbps satellite across 100% of San Mateo with no wired infrastructure.
Only true citywide option; works where cable and fiber don't reach edge properties.
Check first: Higher latency than wired; check if Xfinity's 99% cable footprint reaches you first.
Top ZIP-Level Insights in San Mateo
Hillsdale
Sonic.net is currently the strongest option for Tech-savvy households needing extreme bandwidth.
Sonic.net's 10 Gbps fiber covers 41.2% here—highest concentration in San Mateo—plus AT&T fiber reaches another 47.5% of the ZIP.
Baywood
AT&T is currently the strongest option for Reliable symmetrical fiber for remote work.
AT&T fiber dominates with 70.5% coverage at 5000/5000 Mbps; Xfinity cable available to 25.2% as backup option.
Hayward Park
AT&T is currently the strongest option for Balanced fiber and cable competition.
Nearly even split: AT&T fiber covers 49.6% and Xfinity cable reaches 48.4%, giving residents strong negotiating leverage for pricing.
ZIP 94404
Xfinity is currently the strongest option for Wide cable availability with multi-gig speeds.
Xfinity leads with 48.8% cable coverage at 2000/300 Mbps; AT&T fiber trails at 36.8% but offers symmetrical 5000/5000 speeds.
Internet providers near San Mateo
Coverage can change completely a few miles down the road. If you’re moving to or shopping just outside San Mateo, check the neighboring market directly.
San Mateo Internet FAQs
What is the fastest internet provider in San Mateo, CA?
Sonic.net offers 10000/10000 Mbps symmetrical fiber to 11% of San Mateo, the fastest residential speeds available. AT&T fiber delivers 5000/5000 Mbps to a much larger 59% of the city, making it the fastest widely-available option for most residents.
Can I get fiber internet in Hillsdale San Mateo?
Yes, Hillsdale ZIP 94403 has exceptional fiber coverage: Sonic.net's 10 Gbps fiber reaches 41.2% of the area and AT&T's 5 Gbps fiber covers 47.5%. Combined, nearly 90% of Hillsdale addresses have access to at least one fiber provider with symmetrical gigabit-plus speeds.
What is the cheapest internet option in San Mateo?
Astound Broadband's cable service covers 65% of San Mateo and typically offers promotional starting rates below AT&T and Xfinity. T-Mobile's fixed wireless reaches 50% of the city at 100/20 Mbps speeds and often runs competitive entry-level promotions for existing mobile customers.
What internet speed do I need for 4K streaming and working from home?
You need 25-50 Mbps download and at least 10 Mbps upload for simultaneous 4K streaming and video conferencing. AT&T fiber (5000/5000 Mbps to 59% of San Mateo) or Xfinity cable (2000/300 Mbps to 83%) both exceed these requirements with substantial headroom for multiple users.
Is fiber available near Hillsdale Shopping Center?
Yes, the Hillsdale area (ZIP 94403) has the city's best fiber options: 41.2% coverage from Sonic.net at 10000/10000 Mbps and 47.5% from AT&T at 5000/5000 Mbps. Verify your exact shopping center address, as coverage varies block-by-block even within this well-served neighborhood.
How We Analyze Internet in San Mateo
FCC Broadband Data
We use the FCC National Broadband Map, updated quarterly with provider-reported coverage at the census block level.
Speed Score
Our proprietary score weights technology type (fiber=100%, cable=85%, etc.) with download (70%) and upload (30%) speeds, ranked as a state percentile.
Coverage Calculation
Provider coverage shows what percentage of census blocks in San Mateo report service availability from each provider.
Data Coverage for San Mateo
How We Calculate Speed Score
Our Speed Score is a state-level percentile ranking (0-100) that shows how a provider’s service compares to all other internet options available in your state.
The Formula:
We calculate a raw performance score using:
Technology Factor × (Download Speed × 70% + Upload Speed × 30%)
Technology Factors:
Not all connections are equal. We weight each technology based on real-world reliability and performance:
- Fiber: 100% – Fastest, most reliable technology
- Cable: 85% – High speeds, shared neighborhood bandwidth
- Fixed Wireless (Licensed): 70% – Dedicated spectrum, weather-dependent
- Copper/DSL: 65% – Distance-limited, aging infrastructure
- Fixed Wireless (Unlicensed): 60% – Shared spectrum, variable performance
- Satellite (LEO): 40% – Low-earth orbit (e.g., Starlink), higher latency
- Satellite (GEO): 15% – Geostationary orbit, significant latency
Percentile Ranking:
After calculating raw scores, we rank every service option in your state by geographic coverage (census blocks served). A score of 85 means this service performs better than 85% of all internet options available in your state.
Data Source: FCC National Broadband Map data, updated quarterly.
How We Calculate Capabilities
Estimated Capabilities predict how well each internet plan supports common household activities based on speed requirements and connection type.
Rating Scale:
- Excellent – Optimal performance, handles peak usage easily
- Good – Reliable performance with minimal issues
- Fair – Functional but may experience slowdowns during heavy use
- Poor – Not recommended; expect frequent buffering or lag
How We Rate Each Category:
Streaming
Based on download speed. 4K streaming requires 25+ Mbps per stream; HD requires 5+ Mbps. We account for multiple simultaneous streams.
Multi-device
Evaluates total bandwidth capacity divided by typical household device count (phones, tablets, smart TVs, computers). Fiber and cable handle many devices better than DSL or satellite.
Gaming
Considers both upload speed (for sending game data) and latency (ping time). Fiber and cable excel here; satellite connections struggle due to inherent signal delay.
Whole Home
Assesses whether the connection can reliably serve an entire household during peak evening hours. Factors in technology type (shared vs. dedicated bandwidth) and total speed capacity.
Note: Actual performance depends on your specific location, network congestion, and equipment quality.