Xfinity vs AT&T in Texas — Overview
Xfinity (Comcast) and AT&T are the two most widely available internet providers across Texas, and they compete head-to-head in Houston, San Antonio, and dozens of mid-size cities. However, they deliver internet through fundamentally different technology — and that difference shapes almost everything about the customer experience.
Xfinity uses cable (DOCSIS 3.1) infrastructure, delivering download speeds up to 2 Gbps but with asymmetric upload speeds and a 1.2 TB monthly data cap on most plans. AT&T's best product is AT&T Fiber, which uses fiber-optic lines to deliver symmetric speeds up to 5 Gbps with no data caps. However, AT&T also serves many Texas addresses with older DSL or IPBB technology that maxes out at 100 Mbps — a critical distinction when comparing.
In Texas, Xfinity has the broadest cable footprint, covering most of the Houston metro, parts of San Antonio, and several mid-size cities. AT&T Fiber has been aggressively expanding across Texas and now reaches significant portions of Houston, Dallas-Fort Worth, San Antonio, and Austin. The overlap zone — where both providers offer competitive service — is where this comparison matters most.
Speed Comparison: Xfinity vs AT&T
**Xfinity speeds** range from 75 Mbps ($30/month) to 2 Gbps ($120/month). The most popular plan is 400 Mbps at $55/month. All Xfinity cable plans have asymmetric speeds — the 400 Mbps plan delivers roughly 10-15 Mbps upload. The 1 Gbps plan ($80/month) offers about 35 Mbps upload. Only the 2 Gbps plan provides meaningful upload capacity at 200 Mbps, but it requires Xfinity's XB8 gateway and a wired connection for full speeds.
**AT&T Fiber speeds** range from 300 Mbps ($55/month) to 5 Gbps ($180/month) — all with symmetric upload. The 300 Mbps plan delivers 300 Mbps both down and up. The 1 Gbps plan ($80/month) provides 1 Gbps symmetric. This symmetry is AT&T Fiber's single biggest advantage, especially for remote workers, content creators, and households that rely on video conferencing, cloud backups, or live streaming.
**AT&T DSL/IPBB** — many Texas addresses only qualify for AT&T's copper-based service at 25-100 Mbps. This is not competitive with Xfinity cable. Always verify the AT&T technology type at your address before comparing plans. If AT&T offers only DSL at your address, Xfinity cable is almost certainly the better choice.
Real-world performance: Ookla Speedtest data for Texas shows AT&T Fiber median download of 940 Mbps on the gigabit plan versus Xfinity median of 850 Mbps. The larger gap is upload: AT&T Fiber delivers 900+ Mbps upload versus Xfinity's 35 Mbps on the same tier.:
Pricing and Data Caps
**Xfinity pricing** starts at $30/month for 75 Mbps and scales to $120/month for 2 Gbps. Xfinity frequently offers promotional rates for the first 12-24 months, after which prices increase by $10-30/month. A 1-year or 2-year term agreement is often required to lock in promotional pricing. Equipment rental adds $14/month for the xFi Gateway unless you bring your own DOCSIS 3.1 modem.
**Xfinity's 1.2 TB data cap** applies to most plans in Texas. Overage charges are $10 per additional 50 GB block, up to $100/month maximum. You can remove the cap by adding xFi Complete for $25/month (which also includes the gateway rental) or by upgrading to the 2 Gbps plan. For heavy-usage households — 4K streaming on multiple TVs, large game downloads, cloud backups — the 1.2 TB cap can be a real constraint.
**AT&T Fiber pricing** starts at $55/month for 300 Mbps and goes to $180/month for 5 Gbps. AT&T Fiber has no data caps on any plan and no annual contracts. Pricing is straightforward with no promotional increase after 12 months. Equipment (BGW320 gateway) is included at no additional charge. AutoPay discount of $5/month is available on all tiers.
**AT&T DSL/IPBB pricing** starts at $55/month for 25-100 Mbps with a 1 TB data cap. This represents poor value compared to both AT&T Fiber and Xfinity cable, and should only be considered if no other wired option is available.
Contract comparison: Xfinity typically requires a 1-2 year agreement for promotional pricing with an early termination fee. AT&T Fiber is month-to-month with no contract and no ETF. This flexibility is a significant AT&T advantage for renters and anyone uncertain about their long-term living situation.:
Verdict: Which Should You Choose in Texas?
**Choose AT&T Fiber if** it is available at your Texas address. The combination of symmetric speeds, no data caps, no contracts, and stable month-to-month pricing makes AT&T Fiber the stronger product for most households. Remote workers, gamers, streamers, and large families benefit most from the unlimited data and strong upload speeds. The 300 Mbps plan at $55/month is the best value entry point.
**Choose Xfinity if** AT&T Fiber is not available at your address, or if you need a budget entry point below $50/month. Xfinity's 75 Mbps plan at $30/month and 200 Mbps plan at $40/month undercut AT&T Fiber's starting price. If you are a light internet user — web browsing, email, casual streaming on 1-2 devices — Xfinity's lower tiers are sufficient and more affordable.
**Choose Xfinity with xFi Complete ($25/month add-on) if** you need unlimited data on cable. This removes the 1.2 TB cap and includes the gateway rental, making the effective unlimited cost roughly $105/month for gigabit — comparable to AT&T Fiber's 1 Gbps at $80/month but with weaker upload.
**Avoid AT&T DSL/IPBB**. If AT&T only offers copper-based service at your address, Xfinity cable is the clear winner. Do not compare AT&T DSL pricing to AT&T Fiber pricing — they are fundamentally different products despite sharing the AT&T brand.
In the Texas markets where both Xfinity cable and AT&T Fiber compete — Houston, San Antonio, and surrounding suburbs — AT&T Fiber wins on technology, value, and flexibility. Xfinity wins on price at the low end and on raw download speed at the 2 Gbps tier.
Frequently Asked Questions
Is Xfinity or AT&T better in Texas?
AT&T Fiber is the better choice where available in Texas, offering symmetric speeds, no data caps, and no contracts. Xfinity is better if AT&T Fiber is not available at your address or if you need a plan under $50/month. Avoid AT&T DSL — it is not competitive with Xfinity cable.
Does Xfinity have a data cap in Texas?
Yes. Xfinity enforces a 1.2 TB monthly data cap on most plans in Texas. Overage charges are $10 per 50 GB up to $100/month. You can remove the cap by adding xFi Complete for $25/month or by subscribing to the 2 Gbps plan. AT&T Fiber has no data caps on any plan.
Where do Xfinity and AT&T overlap in Texas?
Xfinity and AT&T compete head-to-head in the Houston metro, parts of San Antonio, and several mid-size Texas cities. In Dallas-Fort Worth, AT&T Fiber is widely available but Xfinity has minimal coverage — Spectrum is the primary cable provider in DFW. Check both providers at your specific address to see what is available.