In San Antonio, the practical fiber-versus-cable decision usually comes down to AT&T Fiber and Spectrum. FCC filings for Bexar County show Spectrum's cable reaching roughly nine in ten serviceable locations and AT&T's fiber reaching a little under two in three, making AT&T, among the providers we track, the fiber network the most San Antonio homes can get. That means a large share of households can order either one — and the two take opposite approaches to the same customer. Spectrum leads with lower introductory prices and faster entry speeds, then raises its rates after the first year. AT&T charges a flat price from the start and matches upload speed to download on every tier. Google Fiber also reports fiber at roughly four in ten Bexar County locations and is worth checking where it reaches; this article focuses on the two networks the most San Antonio addresses can order, and works through what their two approaches cost over time, where each one's speed advantage actually matters, and which kind of household should take which deal.
The short version
Spectrum wins the first year in San Antonio: at every speed level the two sell in common, its introductory price is lower than AT&T's flat price, and its entry plan is faster than AT&T's. AT&T Fiber wins on predictability and upload speed: its price doesn't change after twelve months, and every tier sends data as fast as it receives it. A household that plans to renegotiate or switch once the promotion ends, and doesn't upload much, can reasonably take Spectrum's lower opening price. A household that wants a bill it can predict, works from home, or backs up large files will usually be better served by AT&T Fiber if its address is in the fiber footprint. Both skip data caps and annual contracts, so neither choice locks you in.
Cheapest intro: Spectrum · Fastest download: AT&T Fiber
Plans side by side
| Provider | Plan | Down / Up | Intro price | After promo | Contract | Data cap |
|---|---|---|---|---|---|---|
| AT&T Fiber | Fiber 300 | 300 / 300 Mbps | $55/mo | $55/mo | None | Unlimited |
| AT&T Fiber | Fiber 500 | 500 / 500 Mbps | $65/mo | $65/mo | None | Unlimited |
| AT&T Fiber | Fiber 1 Gig | 1000 / 1000 Mbps | $80/mo | $80/mo | None | Unlimited |
| Spectrum | Internet 500 | 500 / — Mbps | $50/mo | Not published | None | Unlimited |
| Spectrum | Internet Premier 1 Gig | 1000 / — Mbps | $70/mo | Not published | None | Unlimited |
Prices as encoded on our provider pages, last reviewed 2026-09-25. "Not published" means the provider does not publish a standard post-promo rate — expect the promotional price to rise. Coverage shown is modeled; verify the providers available at your exact address before ordering.
Which should you choose?
Choose AT&T Fiber if…
- The price is flat, so the bill in year two is the same as the bill in month one.
- Upload matches download on every tier, which helps with video calls, remote work, and cloud backups.
- FCC filings show its fiber reaching a clear majority of Bexar County locations, more than any other fiber provider we track there.
Choose Spectrum if…
- Its introductory prices are lower than AT&T's at each speed level both offer.
- It reaches nearly all Bexar County locations per FCC filings, including addresses AT&T's fiber hasn't reached.
- The entry plan starts faster than AT&T's entry tier, with no data cap and no contract.
Year one vs year two: how the bills compare
Spectrum's pricing is built around a twelve-month promotion. At the speeds both providers sell, its introductory rate comes in below AT&T's, and its cheapest plan is faster than AT&T's cheapest tier. For the first year, Spectrum is the lower bill. After that the promotional rate ends, and Spectrum doesn't publish the price that replaces it, so the plan table shows it as not published rather than guessing.
AT&T Fiber takes the opposite approach: one flat price with no promotional step-up. That makes the long-run comparison lopsided in AT&T's favor on predictability, even though it can't be settled precisely on cost without Spectrum's regular rate. A reasonable way to decide is to ask whether you'll actually revisit the bill in twelve months. If you will — calling to renegotiate or switching providers — Spectrum's opening discount is real money. If you'd rather set it and forget it, AT&T's flat price removes the surprise.
Where the speed difference shows up
On download speed, the two are close: both top out at a gigabit, and Spectrum's entry plan is faster than AT&T's entry tier. The meaningful gap is upload. Every AT&T Fiber tier uploads as fast as it downloads, while Spectrum's uploads are much slower than its downloads, as is typical of cable.
Whether that gap matters depends on the household. Streaming video, browsing, and gaming lean heavily on download, where Spectrum holds its own. Video meetings, sending large work files, posting video, and backing up phones to the cloud lean on upload, where fiber's symmetrical design is noticeably better. A San Antonio household with someone working from home most days will feel AT&T's advantage; a household that mostly watches and browses may never notice it.
Frequently asked questions
- Is AT&T Fiber available everywhere in San Antonio?
- No. FCC filings for Bexar County show AT&T's fiber at a little under two in three serviceable locations — the widest fiber footprint we track there, but not universal. Spectrum's cable reaches roughly nine in ten. Enter your exact address with AT&T to confirm fiber has been built to your home.
- Does Spectrum raise its price after a year in San Antonio?
- Yes. Spectrum's advertised prices are twelve-month promotional rates that rise afterward, and Spectrum doesn't publish the post-promotion price. AT&T Fiber's price is flat from the start. Neither provider requires an annual contract, so you can switch if the new Spectrum rate doesn't suit you.
- Which is better for working from home in San Antonio?
- Usually AT&T Fiber, if it reaches your address. Every AT&T tier uploads as fast as it downloads, which keeps video calls and large file transfers smooth. Spectrum's uploads are much slower than its downloads, fine for occasional calls but a bottleneck for heavy upload use.
Bottom line
Both the numbers above and the trade-offs are only as useful as what's actually available at your address — start there, then pick the column that fits.
Dig deeper
All providers in San Antonio · AT&T Fiber in San Antonio · Spectrum in San Antonio · Check your address