Comcast Internet in Boulder, CO — Plans, Pricing, and Availability
Comcast (now called Xfinity) is the most widely available internet provider in Boulder, CO. Compare plans, pricing, and speeds for Boulder addresses.
Comcast is the most widely available home internet provider in Boulder, Colorado. In 2017, Comcast rebranded its consumer internet service as Xfinity — same company, same network, same customer service number. If you've been a Comcast customer for years, you're already an Xfinity customer; the only thing that changed is the name on the bill.
Comcast / Xfinity Plans in Boulder
| Plan | Speed | Price/mo | Contract |
|---|---|---|---|
| Connect | 75 Mbps | ~$30–$40 | None |
| Connect More | 200 Mbps | ~$40–$55 | None |
| Fast | 400 Mbps | ~$55–$70 | None |
| Gigabit | 1,200 Mbps | ~$70–$90 | None |
Prices vary by address and current promotion. Introductory pricing typically applies for the first 12–24 months, then increases.
What to Know Before You Sign Up
Equipment fee: Comcast/Xfinity charges ~$15/month to rent their modem/router. Buying a compatible modem outright pays for itself in under a year and eliminates the monthly fee.
Price after promo: The Connect plan often starts low. Ask about the post-promo rate before committing — it's usually $10–$20 higher per month.
No annual contract: All current Xfinity plans in Boulder are month-to-month.
Data cap: Standard plans include a 1.2 TB/month data allowance. Most households don't hit this, but heavy streamers or homes with multiple users should check their usage.
Is Comcast Available at My Address?
Comcast/Xfinity covers most of Boulder — North Boulder, Downtown, South Boulder, and the Hill are all well-served. Some newer developments on the edges of Boulder County may have limited availability.
Check availability at Xfinity's site — takes about 30 seconds with your address.
Comcast vs. Other Boulder Providers
| Provider | Technology | Max Speed | Price |
|---|---|---|---|
| Comcast / Xfinity | Cable | 1,200 Mbps | $30–$90/mo |
| Quantum Fiber | DSL / Fiber | Up to 940 Mbps | $50–$75/mo |
| T-Mobile Home Internet | 5G/LTE | 33–300 Mbps | $50/mo |
| ALLO | Fiber | Up to 2 Gbps | ~$50–$90/mo (expanding 2026) |
See the full Boulder home internet comparison for a side-by-side breakdown of all providers.
Sources
- Xfinity internet plans — Tier 3. Plan names, speeds, and pricing for Boulder. Accessed 2026-05-16.
- FCC Broadband Map — Boulder, CO — Tier 1. Provider coverage by address. Accessed 2026-05-16.