Sonic Fiber vs AT&T Fiber
Two real fiber networks, not cable. The difference comes down to top speed, how many plans you choose from, what you pay later, and whether you already have AT&T wireless.
Prices and plans change often and vary by address. Check each provider before you order.
The short version
If you want the fastest speed, or one simple price with no tiers to think about, Sonic is hard to beat where it's available. If you only need 300 Mbps to 1 Gbps and you already bundle AT&T wireless, AT&T's starting price can come in lower.
Both are real fiber with matching upload and download speeds, so this is a closer call than Sonic against cable.
Side by side
| Provider | Fastest speed | Intro price / mo | Price after intro / mo | Install fee | Technology | Upload = download? |
|---|---|---|---|---|---|---|
| Sonic Fiber | 10 Gbps | $49.99 | $59.99 | Free | Fiber | Yes |
| AT&T | 5 Gbps | $50 | $135 | Free | Fiber | Yes |
Source: Sonic's own city pages (competitive research, September 2026), listing the fastest plan each provider offers. That makes it a marketing source, and it compares top plans rather than entry-level ones. Competitor prices vary by address and change often, so confirm them on each provider's site.
AT&T's promotions depend on autopay and on bundling with wireless, and they changed in June 2026, so the intro figure above may not match what AT&T shows you. Confirm on att.com.
AT&T's plan lineup vs Sonic's single plan
On June 7, 2026, AT&T consolidated its fiber lineup to four tiers: 300 Mbps, 500 Mbps, 1 GIG and 5 GIG. AT&T said prices start at $35 a month for customers who combine its wireless and home internet service.
Sonic sells essentially one fiber plan, up to 10 Gbps, at one price, with an optional $10 a month home phone add-on. There's no tier ladder to climb.
Speed: 10 Gbps vs 5 Gbps
Sonic's ceiling is twice AT&T's. For many households, though, 1 Gbps is plenty, and getting past that needs a multi-gig router and wired connections. Sonic's FAQ is upfront that maximum speeds require 10 Gbps-capable equipment, and that the top speeds are reached over Ethernet.
The extra headroom matters most if you move big files, run a home server, or want to avoid upgrading later.
Price
Sonic. $49.99 a month for the intro period and $59.99 after in the Bay Area, with pricing starting at $40 a month in Los Angeles and Dallas.
AT&T. Starting at $35 a month with a wireless bundle, rising with speed. The everyday price for the 5 GIG tier is listed at $135 a month, the same figure Sonic uses in its comparison.
Install, equipment and availability
Sonic's comparison lists free installation for both. Third-party trackers say AT&T includes its gateway on fiber plans. With Sonic you can use your own router or rent eero equipment.
AT&T Fiber covers many more metro areas nationwide. Sonic is concentrated in the Bay Area and the Los Angeles and Dallas areas, and builds block by block even there.
Who should pick which
Pick Sonic if you want the highest speeds, a flat price, and the available fiber at your address is Sonic's.
Pick AT&T if you want a slower, cheaper tier, you already have AT&T wireless, or Sonic doesn't serve your street.
Questions
Is Sonic faster than AT&T Fiber?
On paper, yes. Sonic's top plan is 10 Gbps and AT&T's is 5 Gbps, both with uploads matching downloads. To use more than 1 Gbps you need equipment with multi-gig ports, and Sonic's own FAQ says 10 Gbps requires 10 Gbps-capable gear connected by Ethernet.
Which is cheaper, Sonic or AT&T Fiber?
It depends on the speed you need. AT&T's lower tiers start at $35 a month for customers who bundle AT&T wireless, which can beat Sonic's price. At the top end, Sonic's 10 Gbps plan costs less than AT&T's 5 Gbps plan.
Do Sonic and AT&T Fiber have data caps?
Sonic's September 2026 comparison lists unlimited, uncapped data for both. Sonic also has no contracts.
Can I get both at my address?
Possibly, but fiber availability differs by street. Check Sonic's site for Sonic and att.com for AT&T.
What do I get for signing up through your link?
Sonic's referral page advertises the first month free for new customers who sign up through a referral link, and its rules say referred customers get the current new-customer promotions and pricing at the time they sign up. Sonic sets the offer and can change it. The referral only counts if you start from the link, so don't begin the order from sonic.com.
Sources
- Sonic: San Francisco page (competitive table, Sept 2026)
- Sonic: fiber internet plans and pricing model
- RTTNews: AT&T's June 2026 fiber lineup
- AT&T fiber tiers and prices (third-party tracker, Sept 2026)
Plans, prices and offers change. Figures above were checked in September and October 2026.
More Sonic Fiber guides
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