AT&T Fiber vs Sonic
Sonic ranks higher on our formula, 86 to 81 on each provider's best plan. AT&T Fiber is cheaper over two years (from $50/mo all-in), and Sonic sells the faster top plan (10 Gbps).
Prices last checked September 2026.
Side by side
AT&T Fiber and Sonic compared
Real cost is the two-year monthly average with the promo step-up, equipment rental and installation folded in.
| Measure | AT&T Fiber | Sonic |
|---|---|---|
| Technology | Fiber | Fiber, DSL |
| Fastest plan | 5 Gbps | 10 Gbps |
| Upload on fastest plan | 5 Gbps | 10 Gbps |
| Lowest advertised price | $50/mo | $50/mo |
| Lowest real cost | $50/mo | $50/mo |
| Price steps up after promo | No | No |
| Data caps | None | None |
| Contracts | None required | None required |
| Equipment fee | Included | Included |
| States served | 22 | 1 |
| Our rating (best plan) | 81/100 | 86/100 |
Plans
Every plan from both
AT&T Fiber
FiberChecked Sep 11, 2026- Fiber 300300 Mbps · $50/mo · real $50
- Fiber 500500 Mbps · $65/mo · real $65
- Fiber 1 Gig1 Gbps · $80/mo · real $80
- Fiber 5 Gig5 Gbps · $95/mo · real $95
Sonic
FiberDSLNot yet checked- Fiber 1 Gig1 Gbps · $50/mo · real $50
- Fiber 10 Gig10 Gbps · $80/mo · real $80
Honest assessment
Where each one wins
AT&T Fiber
- Symmetrical upload and download
- No annual contract, no data cap
- Price does not jump after year one
- Only built in parts of 21 states
- Install windows can be far out
- Multi-gig limited to newer builds
Sonic
- 10 Gig symmetrical for $80
- Explicit no-data-selling policy
- Includes phone service
- California only, and only parts of it
- Build concentrated in the Bay Area
- DSL fallback elsewhere is slow
Head to head
Cities where AT&T Fiber and Sonic compete
Markets where we have both on record. Each page ranks every provider there.
Questions
AT&T Fiber vs Sonic, answered
Is AT&T Fiber or Sonic better?
Sonic ranks higher on our formula, 86 to 81 on each provider's best plan. AT&T Fiber is cheaper over two years (from $50/mo all-in), and Sonic sells the faster top plan (10 Gbps).
Which is cheaper, AT&T Fiber or Sonic?
AT&T Fiber has the lower real cost: $50 a month averaged over two years with fees included, against $50 for Sonic. The advertised entry prices are $50 for AT&T Fiber and $50 for Sonic.
Which is faster, AT&T Fiber or Sonic?
Sonic sells the faster top plan, at 10 Gbps down and 10 Gbps up. AT&T Fiber tops out at 5 Gbps down and 5 Gbps up. For most households upload speed matters more than the headline download figure.
Where can I get both AT&T Fiber and Sonic?
We have both on record in 5 markets, including San Jose, CA; San Francisco, CA; Oakland, CA; Fremont, CA; Sacramento, CA. Availability still varies street by street.
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