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Quantum Fiber vs. Optimum Internet Providers Compared

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Quantum Fiber Vs Optimum

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Rosslyn Elliott

Written by Rosslyn Elliott - Pub. Nov. 10, 2023 / Updated Oct. 9, 2024

You are currently comparing:

Quantum Fiber Vs Optimum

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Plans starting at: $50

Popular Package: Up to 8Gbps

Download speeds up to: 8 Gbps

Connection Types: Fiber

Call today & find the best Quantum Fiber internet deals
1-833-440-3323

Plans starting at: $40

Popular Package: 1 Gig Fiber Internet

Download speeds up to: 1 Gbps

Connection Types: Fiber & Cable

Call today & find the best Optimum internet deals
1-833-337-0356

Quantum Fiber Staff rating

4.3

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

Quantum Fiber is a new, all-fiber brand owned by parent company Lumen Technologies. Lumen is the seventh-largest ISP in the U.S., based on its combined internet service of both all-fiber internet and DSL. In total, Lumen serves about 3 million customers [1]. Quantum Fiber is the all-fiber brand of Lumen. A second DSL-based brand also owned by Lumen is known as CenturyLink. We will review CenturyLink’s DSL service separately, as the two brands are very different in what they offer customers. Quantum Fiber is a very strong choice for internet service that earns good customer satisfaction ratings. If you sign up for Quantum Fiber, you’re going to get lightning-fast speeds and reliable service. Quantum Fiber offers clear, low pricing for gigabit fiber speeds that run up to 8000 Mbps. Fiber speeds will provide you with an internet connection that can handle any use you want from a home internet connection, including heavy streaming and gaming.

PROS

Blazing-fast fiber speeds No data caps Low monthly prices

Cons

Limited availability in rural areas Some connections may be only FTTC Fiber buildout takes time
Call today & find the best Quantum Fiber internet deals
1-833-440-3323

Optimum Staff rating

3.5

Optimum features good speeds but poor customer satisfaction scores

Optimum is a major national cable internet provider. Most of Optimum’s 4.3 million subscribers receive cable internet service. But the ISP is also adding some all-fiber connections in select markets. Optimum is the internet brand name of Altice USA, which rolled the company formerly called Suddenlink into the Optimum brand in 2022 [1]. Altice/Optimum is the 6th-largest ISP in the nation [2]. Optimum seems to check off all the right boxes for many of its offerings. You will have no data caps and no required contracts with Optimum internet plans. You will also get free equipment rental included with your monthly plan price. And Optimum’s prices are good (at least while the promotions last). So why are Optimum’s national customer satisfaction scores so low? We’ll check into that as we give you an overview of what to expect from an Optimum internet connection.

PROS

Gigabit download speeds No data caps or contracts 2-year price guarantee

Cons

Poor customer satisfaction scores Slower upload speeds for cable than all-fiber Price hikes after promo rates
Call today & find the best Optimum internet deals
1-833-337-0356

Quantum Fiber Pricing

4.5

Great prices for Quantum Fiber plans up to 960 Mbps

Your prices will be good for Quantum Fiber. The first-tier price for all-fiber service will be $50/month for 500 Mbps. With any of the Quantum Fiber plans, you will get the use of a 360 Wi-Fi router for free. Quantum Fiber has no data caps and no required contracts. That means you won’t run into unexpected data overage charges or early termination fees. We like this simple, affordable pricing for fast fiber speeds. It's one of the best deals you’ll find on fiber internet.
Call today & find the best Quantum Fiber internet deals
1-833-440-3323

Optimum Pricing

3.0

Good initial prices followed by price hikes

Cable internet is the chief type of connection that Optimum provides its customers. Because of improvements to cable internet technology, you can get gigabit download speeds from many cable internet companies like Optimum. You just won’t get the same upload speeds from cable as you will from an all-fiber connection [3]. Whether you get the usual cable service or all-fiber, you will get good prices from Optimum, and those prices will be locked for 2 years. Here’s an example. You’ll pay $40/month for Optimum’s first tier plan, which is up to 300. That is a good price for these speeds. The catch is that after those two years, standard prices will take effect, which will spike your bill higher. That may be why Optimum is seeing year-over-year declines in its cable customers [4]. The price hikes may be pushing people to other options at the end of their two-year promotion.
Call today & find the best Optimum internet deals
1-833-337-0356

Quantum Fiber Reliability and Performance

4.5

All-fiber internet from Quantum: the latest and greatest technology

Quantum Fiber uses the newest internet technology available. Their fiber-optic lines send data using light signals instead of electricity, and that’s why fiber is so much faster than any other kind of internet technology. An all-fiber connection will give you symmetrical speeds and enough bandwidth to handle any internet activities you choose. If you get a gigabit fiber plan, you can have up to 10 devices doing heavy streaming or real-time games online, and you will still have smooth performance. In some cases, though, Quantum Fiber advises that it may need to run Fiber-to-the-Curb (FTTC), with the last few feet of line to your house connected with coaxial cable. This is important, because even those few feet of coaxial cable will slow your upload speeds. Most of the time, that will not be the case, and you will get the all-fiber connection known as Fiber-to-the-Home (FTTH). But it is important to understand the difference in performance just in case you’re in that small minority that will get an FTTC fiber connection. Even an FTTC connection may still be the fastest internet in your area, though, and a Fiber-to-the-Home connection will definitely be your fastest choice.
Call today & find the best Quantum Fiber internet deals
1-833-440-3323

Optimum Reliability and Performance

4.0

Cable and fiber both provide fast download speeds, but cable's upload speeds are slower

With hybrid fiber-coaxial (HFC) technology, Optimum gives its cable customers gigabit download speeds but much slower upload speeds. That’s typical for cable internet service. Optimum is comparable to other major cable internet providers such as Spectrum and Xfinity, offering upload speeds at a maximum of around 35-50 Mbps. Optimum differs from the cable internet competition because it is also launching into the all-fiber internet market. Optimum’s current fiber internet customer base is small but has doubled in the last couple of years from around 100,000 to over 200,000 subscribers [4]. By 2025, Optimum plans to create over 6.5 million fiber passings [5]. Fiber internet’s most striking advantage over cable internet is that fiber offers symmetrical upload and download speeds. This is a game-changer for online gaming, videoconferencing, and large homes with multiple devices. When Altice merged Suddenlink under the Optimum brand, the company had two distinct “footprints” left from where the old Optimum and Suddenlink coverage had existed. Suddenlink’s coverage area had been primarily in the South and West. Optimum was strong in the Northeast, and particularly in the tri-state area of New York, New Jersey, and Connecticut. Now, the fiber buildout is fastest in that tristate area [1]. Your chances of getting fiber internet from Optimum in the next year or two will be better if you live in the tri-state area.
Call today & find the best Optimum internet deals
1-833-337-0356

Quantum Fiber Equipment, Installation and Bonus Features

4.0

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

If you order a fiber plan from Quantum Fiber, both your equipment and installation fee will be included free of extra charge. Keep in mind that equipment fees and prices do change with various promotions, so make sure you check with your customer support rep on current fees when you call. If you use the free router included with your Quantum Fiber plan, you will get their 360 Wi-Fi system. 360 Wi-Fi is a mesh network, which is much more sophisticated than a single modem/router [2]. You will be able to set up extra Wi-Fi Pods to ensure seamless coverage of your entire space, which is especially helpful if you live in a large home or one with thick walls. You will also have the option to use your own router. The only drawback is that Quantum Fiber tech support cannot give service or information for your personal router the way they can support their own equipment.
Call today & find the best Quantum Fiber internet deals
1-833-440-3323

Optimum Equipment, Installation and Bonus Features

4.0

No equipment rental fees, free installation with Optimum plans

Optimum will provide your modem/router as part of your monthly plan fee, with no extra rental charge. If you have a compatible cable plan, you may even get a Wi-Fi 6 router, which will give you higher speeds for multiple devices than Wi-Fi 5. Fiber internet plans from Optimum will often include the Wi-Fi 6 gateway as well. If you would rather use your own modem and router, Optimum will allow it. Just be sure to check for compatibility with their specs. Standard installation is free with Optimum plans.
Call today & find the best Optimum internet deals
1-833-337-0356

Quantum Fiber Experience & Support

4.0

Quantum Fiber earns high customer satisfaction ratings

Because the split in branding between Quantum Fiber and CenturyLink DSL is still very recent, we have to interpret customer satisfaction rankings that were previously based on the name “CenturyLink” for both brands. Customer satisfaction is much higher for Quantum Fiber than for the DSL provided by CenturyLink. The American Customer Satisfaction Index shows that split in results by dividing “CenturyLink” specifically into fiber and DSL. Fiber (aka, Quantum Fiber) ranks 16 points higher than the DSL service [3]. For Quantum Fiber, these customer satisfaction rankings tell the story clearly. You are likely to have a great internet experience with Quantum Fiber. To avoid confusion, be aware that there is still a certain amount of online cross-marketing between the two companies. Pay attention to the speeds available, whether your internet source labels it “Quantum Fiber” or “CenturyLink.” If the speed is above 200 Mbps, it is a Quantum Fiber product. If the speed is 100 Mbps or below, it is CenturyLink DSL. Overall, we highly recommend Quantum Fiber for its top-of-the-line speeds and reliability, great pricing, and good customer satisfaction ratings.
Call today & find the best Quantum Fiber internet deals
1-833-440-3323

Optimum Experience & Support

3.0

Optimum customer satisfaction: the big question mark

With so many seemingly good points to its service and pricing, why has Optimum’s customer satisfaction scored significantly below average according to J.D. Power? [6] A random sampling of online user reviews seems to indicate two major complaints. The first is outages and failure of technical response. The second is a more general dissatisfaction with the phone system, being transferred around to different departments, and getting contradictory responses from different phone reps when trying to solve billing issues. Because this is a fairly even distribution of complaints, it’s likely that Optimum is just not quick enough in responding to customer concerns, whether they be technical or billing-related. We can’t know the reason for this dysfunction. Often, these kinds of responsiveness issues happen when companies are understaffed or have high staff turnover in their customer service. But until Optimum gets better ratings, we have to give them only 3 stars for customer satisfaction.  
Call today & find the best Optimum internet deals
1-833-337-0356

Quantum Fiber FAQ's

To order or learn more, call the number on this page or visit BuyCenturyLink.com.
No, but both are owned by the same parent company, Lumen. Quantum Fiber is all-fiber internet with super-fast, symmetrical speeds and unlimited data. CenturyLink internet is an affordable DSL home internet service that offers unlimited data. Both types of internet allow you to work from home, shop online, connect multiple users and devices, and stream movies.
Internet availability may vary depending on your location. To check if CenturyLink DSL or Quantum Fiber internet is available in your area, enter your zip code here at CompareInternet.com. We’ll give you a complete list of providers available in your area.
Yes, both CenturyLink and Quantum Fiber allow you to connect multiple users and devices simultaneously. Whether it's for work, school, or entertainment purposes, you can connect and use multiple devices on the same internet connection. Fiber will give you higher speeds than DSL that may work better for multiple devices.
Yes, Quantum Fiber provides Wi-Fi service. With Wi-Fi, you can enjoy wireless connectivity in your home, allowing you to connect your devices without the need for wired connections. The maximum internet speed available for Wi-Fi may vary depending on your location and your internet plan.
Call today & find the best Quantum Fiber internet deals
1-833-440-3323

Optimum FAQ's

To order or learn more, call the number on this page or visit OptimumSavings.com.
No, Optimum does not impose data caps on any of its internet plans. You will have unlimited data on both cable internet and fiber internet plans from Optimum.
Optimum offers a free internet speed upgrade service to loyal customers, providing faster speeds and better value without changing the current price.
Optimum provides two options for renting a modem: one includes tech support and equipment replacement, while the other option is for purchasing a compatible modem.
To explore different speed options for your Optimum Internet service, you can enter your zip code here at CompareInternet.com to see what plans are available in your area.
Optimum offers savings on monthly bills through their Internet + Mobile Savings program, allowing customers to save up to $30/month by combining Optimum Internet and Optimum Mobile services.
Only Optimum Mobile and Optimum Internet customers are eligible for the Internet + Mobile Savings program offered by Optimum.
Call today & find the best Optimum internet deals
1-833-337-0356

Quantum Fiber Accolades

Call today & find the best Quantum Fiber internet deals
1-833-440-3323

Optimum Accolades

Call today & find the best Optimum internet deals
1-833-337-0356

Quantum Fiber Internet Plans

PlanService TypeDownload SpeedMonthly Price
Free Equipment & Free Installation!
Up To 8GbpsFiber InternetUp to 8,000 Mbps Only $165
*Offers and availability may vary by location and are subject to change.
Free Equipment & Free Installation!
Up To 3GbpsFiber InternetUp to 3,000 Mbps Only $100
*Offers and availability may vary by location and are subject to change.
Free Equipment & Free Installation!
Up To 940MbpsFiber InternetUp to 940 Mbps Only $75
*Offers and availability may vary by location and are subject to change.
Free Equipment!
Up To 500MbpsFiber InternetUp to 500 Mbps Only $50
*Offers and availability may vary by location and are subject to change.
Call today & find the best Quantum Fiber internet deals
1-833-440-3323

Optimum Internet Plans

PlanService TypeDownload SpeedMonthly Price
$200 Optimum Prepaid Mastercard! Free installation!
1 Gig Fiber InternetFiber InternetUp to 1,000 Mbps Only $80
*Offers and availability may vary by location and are subject to change.
$50 Optimum Prepaid Mastercard! Free installation!
500 Mbps Fiber InternetCable InternetUp to 500 Mbps Only $60
*Offers and availability may vary by location and are subject to change.
Free Installation!
300 Mbps Fiber InternetCable InternetUp to 300 Mbps Only $40
*Offers and availability may vary by location and are subject to change.
Call today & find the best Optimum internet deals
1-833-337-0356

Quantum Fiber Customers Review

4.5
Pricing
4.5
4.5
Reliability & Performance
4.5
4.0
Equipment, Installation & Features
4.0
4.0
Customer Experience & Support
4.0
4.3
Overall Rating
4.3
Russell Berkley
1.0
from Littleton, CO on August 2025
PSA. Do not work with Quantum Fiber it it is an option near you. I currently have CenturyLink ($65 for gigabit). I'm moving now, and I'm being forced to Quantum Fiber (Same company) instead. They jacked up their prices nearly 100% to $55 plus equipment rental for 500 down. It gets worse. I bite the bullet and get it because it's still cheaper than comcast bs. I schedule the install a week out before I'm officially moving (I work from home, internet is vital). 24 hours before the appointment they delay it with no explanation. 3 days later and 3 times contacting them, I have not been given a reschedule or explanation for the delay. This is the scummiest company I've ever encountered and it's not a contest. It has taken me hours to get to the point where one of their reps will actually cancel the account. It's all, 'oh would you like $25 bucks and no information'
Billie T
1.3
from Hooper, UT on August 2025
If I could give 0 stars I would, they “chose” my backyard to install the main box in, destroyed a main sprinkler line, played the “blame game” about who broke it so nobody ever reimbursed us for fixing it, they are CONSTANTLY demanding access to my backyard to get to the box. My husband let one of their salesman talk him into getting their service (he didn’t realize they are directly tied to Century Link, so the box in the backyard IS there’s), the salesman outright lied to my husband stating that “no they wouldn’t need access to our backyard for installation and that the box isn’t “theirs” when in fact it is and the install went not only to that box, but they had to bury a line across my entire back yard, drill holes in my house, and had no regard to the plants they were stepping all over in my flowerbed while doing the work. I am currently looking for a different provider so I can cancel them and ship their stuff back. The service goes down no less than 3 times a day, the speed is worse than slow, their IT services provide nothing but excuses. We have had them less than a month and I refuse to stay, I guess you get what you pay for, although the price is low the quality is lower than low. If you are considering Quantum Fiber all I can say is RUN don’t walk away from them and go with absolutely any other provider.
Clark E
1.0
from Loveland, CO on August 2025
Worst service ever. Their installation is a joke. They have no regard for a neighborhood,. They just barge in, take over, ruin yards, install overhead lines with no care, concern or common sense. Based on other reviews of how good their service is, and previous CenturyLink experience, I would never do business with Quantum.
Finn G
1.3
from Arvada, CO on July 2025
Worse than Comcast and that's hard to do, we do not think there is much (Dumpy Trump) worse than this corp. Everything goes pretty much as expected until your hardware fails. then watch out. They will play every game in the book from no shows, but I knocked but no one answered, its a no show, CYA to get this. 19+ days no internet, finally the dog rats out the clown coming up the drive, and Quantum tell me I have to go to the house where their equipment is, and make an appointment with that homeowner for Quantum to appear for repair, I do not work for them also I have not the slightest idea which house (over there) he talking about, I do not know those folks. Also I do not make up this service persons schedule, I do not know his supervisor WHAT THE HELL????? Why can't he do this, because he F---- lazy and stupid. We quite, took shit off the wall and sent back, never to trust this crap corp again. Now we are back with Comcast and hating every minute of it. A city the size of Denver and the best they can offer are the two crappiest providers on the planet. We have tried there are just no good options. But Quantum is the worst.
Nichole S
1.0
from Lehigh Acres, FL on June 2025
When digging for their lines the were incompetent. They hit our underground utility and knocked the power out for several hours. The local power company had to send several trucks out to fix what they broke. When the power came back on one of my major appliances did not come back on. The foreman stated it was their fault and they would replace my appliance. After filing a claim the company decided they will not be responsible for their actions. This is not the first time they did this. It has happened in another local community. They lie and damage property. BEWARE!
Call today & find the best Quantum Fiber internet deals
1-833-440-3323

Optimum Customers Review

3.0
Pricing
3.0
4.0
Reliability & Performance
4.0
4.0
Equipment, Installation & Features
4.0
3.0
Customer Experience & Support
3.0
3.5
Overall Rating
3.5
Catherine Pape
2.0
from Watertown, CT on August 2025
Last dec.switched to fiber and was told there was no price increase. Went from under 200 to 282. Also they keep charging me for three tvs and I only have 2. Will not give me credit or change my bill.
Robert P
1.3
from Watertown, CT on August 2025
This is the worst internet company that I have rented from. The price points are at best on par with their competitors, and at worst, grossly overcharged. But the most significant concern with Optimum is their piss-poor customer service. If you ever have an issue with coverage or billing, prepare to navigate a Kafkaesque labyrinth of sleepy phone representatives, with the personalities of a baked potato from Applebees and the reasoning capabilities of a beta Chatbot. Optimum served its purpose... for one year. When I moved, I temporarily disconnected my Wifi service, intending to renew it in the new location. The company rep assured me that I could keep the same equipment and plan in the next apartment... only to get there and have Optimum tell me that I needed to upgrade to fiber. Well, not wanting to deal with the 100 dollar install fee and 20 dollar monthly price hike, I decided to switch to Verizon (a great decision by the way—I cut my bill in half, and could install the wifi gateway myself). A new Odyssey of phone calls with Optimum's "retention" team began. Let me save you the trouble: they will offer you competitive counteroffers, gift cards, credits, and other perks, but read the fine print, because the good stuff expires long before the price lock that they promise. At one point, I nearly thought they wouldn't actually let me leave. In short, it's a load of dug, and this is the type of company that needs to swindle and lie in order to stay afloat. Please, save yourself the money and gray hairs. Look elsewhere.
Douglas K
2.3
from Ozark, MO on August 2025
Run around every time you try to talk to someone. Too much money for basic internet
Amanda Hunter
3.3
from Boyce, LA on August 2025
They're not very willing to work with you on anything
Doreen Depalo
1.5
from Yonkers, NY on July 2025
Service is too expensive for just WI. Fi, i'm on the fixed income and low subsidy service does nothing but buffer all the time not worth the price
Call today & find the best Optimum internet deals
1-833-337-0356
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