Xfinity internet plans can reach gigabit download speeds of up to 3 Gbps on a cable or fiber connection. Its cheapest, cable internet-only plan is $39.99 per month, but if you want fiber internet, keep in mind that it costs a hefty $299.95 per month. That said, it offers more plan variety than Sonic, which has three options: Fusion Fiber, Standard Fiber, and Basic Fiber.
With Sonic, you get speeds up to 10 Gbps but pricing is much cheaper at $49.99 per month. What you won’t get are other connection options, as you’re stuck with only one fiber internet plan. It’s also only available in certain areas of California, so availability is extremely limited.