Quantum Fiber vs. EarthLink Internet Providers Compared

Quantum Fiber brings superior internet speeds and reliability at an appealing price.

Quantum Fiber is a fiber-optic network under the parent company Lumen Technologies, which also operates CenturyLink’s DSL-based service. According to the latest data from June 2025, the Federal Communications Commission states that Quantum Fiber is available to just over 2.3% of U.S. households, making it one of the largest fiber-optic networks in the United States [1]. The service operates in 18 states, as well as a number of cities, with the strongest coverage in Arizona, Colorado, Florida, Iowa, Minnesota, Nebraska, Oregon, Utah, and Washington [2]. In May 2025, AT&T announced plans to acquire Quantum Fiber's parent company for nearly $6 billion; the transaction is expected to close in 2026 [3]. AT&T has indicated that no immediate changes are planned and will continue to "prioritize putting customers first" following the acquisition. The sale ultimately resulted in Lumen reporting $915 million in losses for Q2 2025, with Lumen attributing losses to the accounting changes, and "not from money actually spent" [4]. Quantum Fiber delivers symmetrical fiber-optic speeds ranging from 200 Mbps to 8000 Mbps in select markets, with no data caps or contract requirements. The service stands out for its "Price for Life" guarantee, which locks in your monthly rate permanently—a significant advantage in an industry where 63% of customers reported price increases in the past year [5].

Great prices and a Price-for-Life Guarantee.

Quantum Fiber offers straightforward pricing that includes an autopay discount. Monthly costs are approximately $5 higher if you don't enroll in automatic payments. In most markets, the two primary plans available are the 500 Mbps and 1,000 Mbps (1 Gig) tiers. Multi-gigabit options—up to 2 Gig, up to 3 Gig, and up to 8 Gig plans—are available in select areas. All plans include free equipment rental during an initial period, unlimited data, and no contracts [7].

Value Analysis

When evaluating internet plans, the cost per megabit provides insight into true value. Quantum Fiber's entry-level 500 Mbps plan at $50 per month equates to 10 cents per Mbps—a competitive rate for fiber service. This pricing structure positions Quantum Fiber favorably against cable providers that may advertise lower introductory rates but dramatically increase rates after promotional periods end.

Fees and the Price-for-Life Guarantee

Quantum Fiber’s "Price for Life" guarantee locks in your plan rate permanently, making it a great deal. Unlike most cable internet providers that raise prices after the promotional period of one or two years, Quantum Fiber maintains your original rate indefinitely. If you sign up for the 200 Mbps plan at $30 per month, that rate remains locked in, even if the same plan later costs new customers $20 more. This guarantee applies specifically to your base service rate. Three potential cost increases are still possible:

1. Equipment rental fees: Quantum Fiber provides free equipment during an "initial period." After this period ends, rental fees may apply. You can drop these fees altogether by using your own compatible router.
2. Installation costs: Professional installation is currently free, though Quantum Fiber states this "could change in the future," and additional products or services might incur extra installation costs.
3. Taxes and miscellaneous fees: Local and state taxes and regulatory fees may increase over time, beyond Quantum Fiber's control.

No Data Caps or Contracts

All Quantum Fiber plans include unlimited data, allowing unrestricted internet use within the acceptable use policy without overage fees or speed throttling. The absence of contracts means you can cancel or modify service at any time without incurring early termination fees.

Earthlink will charge you more initially, but prices even out by the second or third year

Many internet service providers will offer you a great promotional price for a year or two, but then raise prices much higher. Earthlink will not offer you initial promotional prices, so their plans may initially give you sticker shock. For initial prices, Earthlink will charge you more for every type of internet service: fiber, fixed wireless, or satellite. But in some cases, over the course of a few years, you may even end up saving a little money with Earthlink. Only a head-to-head comparison of specific providers in your area will tell you, so check out our price plan comparisons using your zip code.

Pricing will also vary significantly based on your internet connection type

The biggest difference between Earthlink plans is whether your chosen plan has a data cap. Earthlink Fiber internet won’t have data caps. Earthlink satellite internet and fixed wireless (4G LTE or 5G) will have data caps. If you have a plan with data caps, you may end up having to buy extra data at the end of the month. Because of these unpredictable charges, satellite pricing and fixed wireless pricing for Earthlink are less stable than for their other plans. But here’s an unusual benefit of Earthlink Wireless Home Internet. Most Earthlink plans require a one-year contract, but Earthlink’s Wireless Home Internet plans do not require a contract [2].

Symmetrical upload and download speeds and superior reliability during peak usage times.

Quantum Fiber utilizes fiber-optic technology, which provides two key advantages over cable and DSL: symmetrical upload and download speeds, and superior reliability during peak usage times. Symmetrical speeds mean your upload capacity matches your download speed. On the 8000 Mbps plan, for instance, you receive 8000 Mbps in both directions. This is valuable for video conferencing, uploading large files, livestreaming, and cloud backups.

Fiber-to-the-Home vs. Fiber-to-the-Curb

In most installations, Quantum Fiber deploys Fiber-to-the-Home (FTTH), where fiber-optic cable runs directly to your residence. This provides the fastest possible speeds with full symmetrical performance. However, in some cases, Quantum Fiber may install Fiber-to-the-Curb (FTTC), where the final connection to your home uses coaxial cable. Even a short coaxial cable segment will reduce upload speeds compared to pure fiber. If you receive an FTTC connection, your download speeds may remain at the advertised levels, but your upload speeds will be slower than the symmetrical speeds typical of FTTH. Before installation, confirm which connection type your location will receive.

Performance Capacity

A gigabit fiber plan from Quantum Fiber supports about 10 devices simultaneously, enabling high-bandwidth activities (such as 4K streaming and online gaming) while maintaining smooth performance. The combination of low latency, high bandwidth, and consistent speeds makes fiber particularly well-suited for households with multiple heavy internet users.

Earthlink’s performance depends completely on the networks of major partners

One of Earthlink’s claims to fame is having “the largest network,” because Earthlink serves 90% of the United States [1]. The reality is that Earthlink does have a very large coverage area, but Earthlink does not own the networks in those areas. Differences between Earthlink’s partner networks will mean that your internet speed and performance will vary if you sign up with Earthlink. Just like Earthlink’s pricing, the quality of the service they can deliver depends on other providers. Most of the time, this works out fine because Earthlink partners with reputable ISPs. But Earthlink does not have control over your service, and that can be a disadvantage if something goes wrong. If you get Earthlink Fiber, you are probably going to be happy with your speed and reliability. Fiber is known for these advantages. Earthlink satellite or fixed wireless will often be too slow for real-timeactivities such as real-time gaming or videoconferencing. Reliability issues are going to be more likely with Earthlink’s satellite internet or Wireless Home Internet. Both satellite and wireless internet can be affected by weather. Fixed wireless can also slow down at peak times when thenetwork is congested with more traffic. Satellite internet tends to have high latency, which means a slight lag in the transmission of a signal. Latency is not noticeable for many internet activities but may affect real-time data transfer for gaming and videoconferencing.

Get free use of a  360 Wi-Fi mesh router or use your own router

Quantum Fiber provides its 360 Wi-Fi equipment at no additional cost during an initial period. This system includes a SmartNID ONT device and up to four mesh Wi-Fi pods. The number of Wi-Fi pods will be determined by your installation technician based on your home's size. Most equipment has Wi-Fi 6 connectivity, but Wi-Fi 7 is available in select areas. The mesh network architecture offers better coverage than traditional single-router setups. This is beneficial for larger homes or properties with thick walls that impede wireless signals. The 360 Wi-Fi system creates whole-home connectivity by placing pods throughout your space, eliminating dead zones and ensuring seamless handoff as you move between areas. This setup supports the high device counts and bandwidth demands typical of modern households.

Professional Installation

Quantum Fiber currently provides free professional installation. The internet provider has noted this "could change in the future," and customers requiring additional products or services may incur extra installation costs. Professional installation ensures proper fiber-optic connection, optimal equipment placement for your home's layout, and immediate resolution of any technical issues. The installation process:

• Running fiber-optic cable to your home (FTTH) or to the curb (FTTC)
• Installing the SmartNID ONT
• Positioning mesh Wi-Fi pods throughout the home
• Testing connection speeds and performance
• Explaining system features and troubleshooting resources

Earthlink’s installation fees and equipment fees vary

We can't give a score for any kind of consistent pricing or equipment fees because of Earthlink's 3rd party seller business model. Earthlink’s lower rating from us in this category results from the lack of simple, freely available information on pricing and fees on their website, as well as their higher prices for equipment and installation. This lack of transparency is one of the weaknesses of the telecom industry. We recommend that Earthlink, along with other internet providers, begin to be much more straightforward about which services are available across the United States and how much they cost in each area. Satellite equipment will cost you considerably more if you buy it upfront, which is typical of satellite. Earthlink will offer you the option to rent the equipment if that is more feasible. Satellite equipment will come from Viasat, Earthlink’s satellite internet partner. Because Viasat’s equipment fees are $12.99/month or $299.99 prepaid, consumers should estimate that Earthlink’s fees for Viasat equipment will be similar or slightly higher [3]. Earthlink’s bonus services include Easy Tech for unlimited tech support at $9.95 a month. Earthlink Guardian provides parental monitoring, Earthlink Protect gives security protection, and Earthlink Online Backup will protect you from data loss.

Quantum Fiber ratings often skewed by CenturyLink

According to the 2025 American Customer Satisfaction Index (ACSI) report comparing internet providers, Quantum Fiber scored 71 out of 100 points—a 7% decline from the previous year. This places Quantum Fiber four points below the fiber industry average of 75 [3]. The 2025 ACSI data also indicated that overall fiber provider scores decreased by 1% year-over-year across the industry [8]. The J.D. Power 2024 U.S. Residential Internet Service Provider Satisfaction Study did not differentiate between Quantum Fiber and CenturyLink DSL, instead reporting combined results for Lumen Technologies. In the West, where Quantum Fiber has its strongest presence, Lumen Technologies ranked last with a score of 511 out of 1,000. This combined scoring methodology means CenturyLink's lower-performing DSL service likely impacted the overall rating. If you compare fiber and DSL services within the Lumen portfolio, the ACSI shows Quantum Fiber's fiber service scores 16 points higher than CenturyLink's DSL offerings. This gap showcases that fiber customers report better experiences than DSL subscribers. The 7% satisfaction decline and below-average ACSI score suggest Quantum Fiber has customer experience downfalls regardless of its technical advantages. Issues affecting its customer experience ratings likely include installation delays, equipment problems, billing discrepancies, and customer service responsiveness. Reddit backs this up, with some users frustrated with Quantum Fiber's reliability: "The speed is great, consistent 550mbps up and down, but it is so unreliable" [9]. Other subscribers report a more positive experience, but do note that they are utilizing their own equipment instead of the Quantum Fiber-supplied equipment: "Love [Quantum Fiber], just get your own wifi equipment" [10]. Despite the below-average satisfaction scores, Quantum Fiber remains a strong technical choice where available. The combination of fast symmetrical speeds, unlimited data, no contracts, competitive pricing, and the price-for-life guarantee creates genuine value.

Earthlink is known above all for superior customer service

When you research Earthlink online, you will see that Earthlink survives on its customer service. The company gets good, solid ratings for customer service, where many ISPs fall far short. That means that if you call Earthlink, odds are that you will be satisfied with what they do for you. There are just a couple of caveats to that recommendation. First, some customers report that their customer service has been routed to Earthlink’s partner providers, which removes the whole point of having Earthlink service if you’re seeking their brand of better customer service. Second, Earthlink acknowledged beginning to “reshore” its service in September 2021, which implicitly reveals that the company had offshored its customer service [4]. Offshoring customer service to foreign countries is not only potentially frustrating for the customer, but worse for U.S. workers. Many internet providers now base their customer service in the United States, and we hope Earthlink will be sure to provide its own customer support from within the country.