Xfinity vs Sonic: Side by Side Comparison

A Side-by-Side Comparison of Xfinity and Sonic Net in 2021.

Both Xfinity from Comcast and Sonic Net are highly ranked in terms of coverage for residential internet service providers. Xfinity holds the top spot as the largest residential cable provider in the country and Sonic is the eighth largest cable provider and 22nd largest fiber provider. Not only do they both offer their services to a widespread population in the U.S., but they also offer fiber and have plans with similar speeds and unlimited data. Although they share these things in common, it’s important to look at what sets these providers apart to make an informed decision. We recap these differences below.

Xfinity Info

Price Range


Sonic Info

Price Range


Xfinity vs. Sonic Comparison
Provider Xfinity Sonic
Speed 50-2,000 Mbps 20-1,000 Mbps
Pricing $29.99-299.95/mo. $39.99-59.99/mo.
Service Type Cable or Fiber DSL, Copper or Fiber
Provider Xfinity Sonic
High-Speed Plans Yes Yes
Unlimited Data Select Plans Yes
Contract-Free Plans No Yes
TV Service Yes No
Phone Service Yes Yes

Xfinity Internet Deals †

Last updated on 7/20/2021

†All plans not available in all areas or to all customers. Verify details with Xfinity.

Sonic Internet Deals †

Last updated on 6/7/2021

†All plans not available in all areas or to all customers. Verify details with Sonic.

Xfinity vs. Sonic Performance Overview

Xfinity from Comcast is the number one cable provider in the U.S.—they offer their services to more than 112.1 million people across 39 states. In addition to their cable service, customers can also opt for their fiber services as well. People who live in the area serviced by Xfinity can also enjoy plans with unlimited data as well as the option for contract-free plans.

Sonic Net offers DSL internet service to 2.9 million people and its fiber service to about 398,000 people. Sonic customers can choose to bundle their internet with phone services and, like Xfinity, Sonic’s plans come with unlimited data.

Xfinity Installation

If your home is not wired for Xfinity’s service and you’re a new customer, your home will likely require professional installation for a fee of $90. However, if you live in or are moving to an area that is serviced by Xfinity, your home may already be wired for their service and you can choose to self-install for free—you just need to pick up the tools or have them shipped to you.

Sonic Installation

Sonic Net offers free professional installation to new customers for their DSL and fiber services. Depending on which service you choose and where you live, you may be able to opt for self installation, if you prefer. Their self-installation kit comes with a guide to set up the equipment.

Xfinity Contracts, Equipment Fees & Fine Print

Most of Xfinity’s plans require a contract length of 1-2 years. Make sure to thoroughly read your contract for the early termination fees, because if you break the contract early, you may need to pay anywhere from $5-$10 for each remaining month. If you’d prefer to not have a contract, you can pay an additional $10/month to go contract-free. You will also need to pay $14/month to rent the modem and router, or you can use your own equipment as long as it’s compatible.

Sonic Contracts, Equipment Fees & Fine Print

Sonic Net requires a 1-year contract for all of its plans and does not have the option to go contract-free. If you cancel after a month, you will be charged an early termination fee of $149 or the remaining monthly charges; Sonic will allow you to pay the cheaper option. Sonic charges a rental fee of $9.50/month to lease a modem.

Xfinity Data Caps

Depending on where you live, you may be able to choose from Xfinity’s internet plans with unlimited data. If you don’t live in one of these areas, your plan will likely feature a 1 TB data cap. If you end up going over this cap, which isn’t likely for average households, you will be required to pay $10 for an additional 50 GB. You can also add unlimited data for an extra monthly fee of $30.

Sonic Data Caps

Sonic Net does not have data caps on any of their plans.

Great Service

on October 06, 2019

First time Xfinity subscriber. Exceeded my expectations. I can honestly say I was very impressed with all aspects of Xfinity. I just purchased a home in Delray Beach FL. From the initial appointment call to complete installation, Xfinity exceeded my expectations. Very impressed with the Tech. The tech arrived early. He introduced himself and ask me about my expectations. He explained what he was going to do and would have me watching NFL football today. Walked me through the setup and all options of the remote. I ordered cable and internet. I will say the internet service is faster than others. Very impressed with Xfinity.

Great internet service experience

on May 25, 2021

I had a problem with internet connectivity. The service person from Xfinity who came today (May 25) was outstanding. He was courteous, knowledgeable, and patient -- a real pro. He checked outdoor connections, the indoor cable, the modem, etc., and kept going until the problem was resolved. I hope Xfinity gives him a commendation for his great work.

Fiber service is great!

on November 22, 2017

I've been a Sonic customer for many years for their customer service alone. On the rare occasions I call, I get to immediately talk to a smart person who can fix things. That alone made me a loyal customer. Earlier this year they upgraded me to their gigabit service. My price actually went down, and now I have 1000 Mbps service both up and down. It's been fast and reliable, and I heartily recommend them.

Simply Awesome!

on December 14, 2020

Top-notch speed at 1Gbps up & down with no cap! It outright beats the others that I used to subscribe to. I have it for over 4 1/2 years in my neighborhood now. Lovin' it!

Xfinity vs. Sonic Coverage Availability

Xfinity Coverage & Availability

Sonic Coverage & Availability

Frequently Asked Questions about Xfinity & Sonic

  • Is Xfinity cheaper than Sonic?

    Sonic’s plans are cheaper than Xfinity’s. Xfinity’s cheapest plan, $49.95 per month, is slightly more expensive than Sonic Net’s cheapest plan at $39.99 per month. However, there’s a much larger gap between Xfinity’s most expensive plan, $299.95 per month, and Sonic’s most expensive plan which is $69.99 per month.

  • Who has faster speeds? Xfinity or Sonic?

    Xfinity has faster speeds than Sonic. Although Xfinity’s slowest speeds are 15 Mbps and Sonic’s slowest speeds are 20 Mbps, Xfinity’s speeds go up to 2000 Mbps whereas Sonic’s go up to 1000 Mbps. Be sure to check which speeds are available in your area.

  • Do Xfinity and Sonic have unlimited data?

    Both Xfinity from Comcast and Sonic Net have plans with unlimited data. Where Sonic’s plans always offer no data caps, Xfinity’s unlimited data plans are only offered in certain areas. If you don’t live in an area where Xfinity offers unlimited data, you may be able to receive a 1 TB data cap or add on unlimited data for an additional $30 per month.