Best Internet Providers in Sunnyvale, CA
Compare 9 providers serving 155,805 Sunnyvale residents. Fiber, cable, 5G, and satellite plans in the heart of Silicon Valley.
Quick Answer: Best Internet in Sunnyvale
Xfinity is the most widely available provider in Sunnyvale, CA, covering about 89% of the city with cable and fiber speeds up to 2 Gbps. AT&T Fiber reaches 77% of addresses with symmetrical speeds up to 5 Gbps. Verizon Fios serves 30% of Sunnyvale with solid fiber plans. T-Mobile 5G provides a wireless alternative at $40-50/month with no contracts.
Key Takeaways
- Best for coverage: Xfinity at 89% of Sunnyvale addresses
- Best for speed: AT&T Fiber up to 5 Gbps symmetrical
- Best for renters: T-Mobile 5G, no contract, $40-50/mo
- Silicon Valley advantage: Dense fiber infrastructure from multiple providers
- 9 providers: Among the most competitive markets in California
Sunnyvale Internet Providers Comparison
Verified February 2026. Coverage percentages based on FCC data.
| Provider | Technology | Max Speed | Starting Price | Data Cap | Contract | Call Now |
|---|---|---|---|---|---|---|
| Xfinity | Cable/Fiber | 2 Gbps | $30/mo | 1.2 TB | No | 1-844-963-0138 |
| AT&T Internet | Fiber/DSL | 5 Gbps | $55/mo | None (fiber) | No | 1-855-850-5977 |
| T-Mobile 5G | 5G/Fixed Wireless | 245 Mbps | $40/mo | None | No | 1-844-275-9311 |
| Verizon Fios | Fiber/5G | 2 Gbps | $50/mo | None | No | 1-855-387-1456 |
| Spectrum | Cable | 1 Gbps | $30/mo* | None | No | 1-844-481-5997 |
| HughesNet | Satellite | 100 Mbps | $39.99/mo | Limited | 2-year | 1-855-543-5405 |
| Viasat | Satellite | 150 Mbps | $39.99/mo | Unlimited* | No | 1-855-463-9333 |
| Starlink | LEO Satellite | 250 Mbps | $120/mo | Soft cap | No | Online only |
*Spectrum first-year promo. Viasat Unleashed plan. Prices before taxes/fees.
Top Sunnyvale Internet Providers Reviewed
Xfinity Internet in Sunnyvale
Xfinity leads Sunnyvale coverage at 89% with cable and fiber service. Plans start around $30/month for 200 Mbps and scale to 2 Gbps. The 1.2 TB data cap applies to most plans; unlimited data costs an additional $30/month.
Choose If:
- You want the widest coverage in Sunnyvale
- Budget-friendly pricing is your priority
Avoid If:
- The data cap is a dealbreaker for your household
AT&T Fiber in Sunnyvale
AT&T Fiber covers 77% of Sunnyvale with symmetrical speeds up to 5 Gbps and no data caps. Starting at $55/month for 300 Mbps, AT&T is the performance leader for tech professionals working from home in Silicon Valley.
Choose If:
- You need symmetrical speeds for uploads and video calls
- No data caps matter for your household
Avoid If:
- You want the lowest possible monthly price
Verizon Fios in Sunnyvale
Verizon Fios serves about 30% of Sunnyvale with symmetrical fiber speeds up to 2 Gbps. Plans start at $50/month for 300 Mbps with no data caps or contracts. Solid option in areas where it overlaps with Xfinity and AT&T.
Choose If:
- Fios is available and you want reliable symmetrical fiber
Avoid If:
- Your address is outside the 30% Fios footprint
Sunnyvale Speed and Price Comparison
| Speed Tier | Xfinity | AT&T Fiber | Verizon Fios | T-Mobile 5G |
|---|---|---|---|---|
| 300 Mbps | $30/mo | $55/mo | $50/mo | $40-50/mo |
| 500 Mbps | $60/mo | $65/mo | $70/mo | - |
| 1 Gbps | $80/mo | $80/mo | $90/mo | - |
| 2 Gbps | $120/mo | $110/mo | $120/mo | - |
Read our fiber vs cable comparison for more details.
Internet in Sunnyvale: Local Overview
- Population: 155,805
- CBSA: 41940 (San Jose-Sunnyvale-Santa Clara)
- Major employers: Google, Apple, LinkedIn, Juniper Networks
- Fiber providers: AT&T, Verizon Fios, Xfinity
Sunnyvale is at the center of Silicon Valley, driving high demand for fast, reliable broadband. Tech workers who regularly upload large files, join video conferences, and run cloud-based tools benefit from the city's robust fiber infrastructure. AT&T and Xfinity compete aggressively here, and Verizon Fios is expanding its footprint.
The city's mix of single-family homes and apartment complexes means coverage varies. T-Mobile 5G is a popular option for renters in multi-unit buildings where wired installation can be difficult.
Internet by Area
- Downtown Sunnyvale: Strong Xfinity and AT&T coverage
- Lakewood Village: AT&T Fiber and Xfinity available
- Birdland: Xfinity dominant with expanding Verizon Fios
- Ponderosa/Fair Oaks: Multiple provider options including fiber
Sunnyvale Internet FAQ
What is the best internet in Sunnyvale?
Xfinity has the widest coverage at 89%. AT&T Fiber delivers the fastest speeds up to 5 Gbps symmetrical.
Is fiber available in Sunnyvale?
Yes. AT&T covers 77%, Verizon Fios serves 30%, and Xfinity offers fiber in parts of its network.
How much does internet cost in Sunnyvale?
Plans start at $30/month for cable. Fiber plans begin at $50-55/month. Most pay $60-100/month.
What is the fastest internet in Sunnyvale?
AT&T Fiber at up to 5 Gbps symmetrical. Xfinity and Verizon Fios both offer up to 2 Gbps.
Is T-Mobile 5G available in Sunnyvale?
Yes. T-Mobile covers about 59% of Sunnyvale at $40-50/month with no contracts or data caps.
About the Author
Last Updated: February 7, 2026
Reviewed quarterly for accuracy using FCC data and provider confirmation.
Editorial Disclosure
InternetProviders.ai provides accurate, unbiased information. Some providers are partners who compensate us for signups through our links or phone numbers. This does not influence our ratings. See our editorial guidelines and how we make money.
Internet Speed Requirements for Sunnyvale Households
The speed you need in Sunnyvale depends on how many people and devices use your connection simultaneously. A single person streaming video and browsing the web can get by with 50-100 Mbps. A household of 2-3 people with regular streaming and video calls should target 200-300 Mbps. Larger families with 4 or more heavy users benefit from 500 Mbps to 1 Gbps plans, especially when multiple people are streaming in 4K, gaming online, or working from home at the same time.
Upload speed matters just as much as download speed for Sunnyvale residents who work remotely. Video conferencing platforms like Zoom and Teams require at least 5 Mbps upload for stable HD video, and 10 Mbps or more for group calls with screen sharing. If multiple household members participate in video calls simultaneously, ensure your plan provides at least 20-25 Mbps upload speed. Fiber plans offer the best upload performance with symmetrical speeds.
How to Choose an Internet Provider in Sunnyvale
Start by checking which providers actually serve your specific address in Sunnyvale, as coverage can vary significantly even within the same city. Enter your address on each provider's website or use our comparison tool to see all available options. Compare the actual speeds offered at your address, not just the provider's maximum advertised speed, since availability of faster tiers depends on local infrastructure.
Beyond speed, compare the total monthly cost including equipment rental fees, installation charges, and price increases after promotional periods end. Providers in Sunnyvale, California may offer different promotions depending on the season and competition in your area. Ask about no-contract options to maintain flexibility, and check whether a provider requires a credit check, as some offer prepaid alternatives. Reading recent customer reviews specific to Sunnyvale gives the most relevant picture of service quality and reliability in your neighborhood.
Internet Equipment Options in Sunnyvale
Most internet providers in Sunnyvale offer the option to rent a modem and WiFi router for $10-15 per month or use your own compatible equipment. Purchasing your own modem and router costs $140-250 upfront but saves $120-180 annually in rental fees, paying for itself within 12-18 months. Check your provider's compatible equipment list before purchasing to ensure the modem supports your plan speed and technology type.
For homes in Sunnyvale larger than 1,500 square feet or with multiple floors, a mesh WiFi system provides better coverage than a single router. Mesh systems like Google Nest WiFi, Eero, and TP-Link Deco use multiple access points to blanket your home with consistent signal. If your home has coaxial wiring from previous cable TV service, a MoCA adapter can create a wired backbone between access points for even better performance without running new Ethernet cables.