CenturyLink vs Optimum: Which Internet Provider Is Better?
Updated
CenturyLink and Optimum only overlap in pockets — but where they do, the decision is really fiber versus cable (or fiber versus fiber). CenturyLink branding may mean slow DSL or a Quantum Fiber service. Optimum may mean cable today and fiber in the next neighborhood. Check the technology on the quote, not just the logo.
CenturyLink vs Optimum at a glance
| CenturyLink / Quantum Fiber | Optimum | |
|---|---|---|
| Common tech | Fiber (Quantum) or DSL (legacy CenturyLink) | Cable and fiber, market-dependent |
| 1 Gig ballpark | About $50/mo on Quantum Fiber promos | About $55/mo on current Auto Pay promo cards |
| Uploads | Fiber: strong / symmetrical or near-symmetrical; DSL: weak | Fiber: strong; cable: much lower uploads |
| Contracts | Quantum Fiber: no annual contract | Month-to-month promos with Auto Pay rules |
| Watch-outs | Do not buy DSL thinking it is fiber | Gateway fees after promo; post-promo rate steps |
CenturyLink / Quantum Fiber pricing
On Quantum Fiber's deals page (October 5, 2026), advertised tiers include 500 Mbps for $50, 1 Gig for $50 (promotional discount off a higher regular rate with bank AutoPay), 2 Gig and 3 Gig for $70 in select markets, and 8 Gig for $165. There is no annual contract on those fiber offers.
If your address only qualifies for CenturyLink DSL, expect much lower speeds over copper. That product should not be compared with Optimum fiber or even Optimum cable as an equal. Related reading: Google Fiber vs CenturyLink Fiber and AT&T vs Quantum Fiber.
See which brand actually serves your address
CenturyLink, Quantum Fiber and Optimum footprints are hyper-local. Check your ZIP.
Optimum pricing
Optimum's current internet cards show 300 Mbps for $35, 500 Mbps for $45 and 1 Gig for $55 with Auto Pay and paperless billing discounts. Gateway pricing is often promotional at first, then can step up. Plans advertise no data caps and a 60-day money-back window. Some markets get true fiber; others stay on cable with slower uploads — ask which one your address receives.
If you are leaving Optimum entirely, see best alternatives to Optimum internet.
How to choose where both appear
- Identify the tech. Quantum Fiber beats CenturyLink DSL. Optimum fiber beats Optimum cable on uploads.
- Compare uploads if you work from home or upload large files.
- Add equipment and Auto Pay rules to both quotes.
- Check brand transitions. Some former CenturyLink areas now bill as Brightspeed; see what changed with Brightspeed.
Which provider wins?
Pick Quantum Fiber / CenturyLink fiber when the quote is real fiber at a sharp gig price.
Pick Optimum when it offers fiber at your address with a better promo, or when CenturyLink only offers DSL.
Avoid CenturyLink DSL if any cable or fiber alternative reaches the property.
Need a side-by-side quote?
We can help you compare CenturyLink/Quantum Fiber and Optimum on real monthly cost.
Frequently asked questions
Is Quantum Fiber the same as CenturyLink?
Quantum Fiber is the fiber brand long associated with CenturyLink/Lumen fiber. Some accounts have moved between Quantum and CenturyLink billing. DSL under the CenturyLink name is a different, slower product.
Which is faster, CenturyLink or Optimum?
If both offer fiber at your address, compare the fiber tiers directly. Optimum also sells cable plans with slower uploads. CenturyLink DSL is usually the slowest option of the three.
Which is cheaper?
It depends on the address. Quantum Fiber often shows 1 Gig near $50/mo with Autopay discounts for new customers, while Optimum promo cards recently show 300 Mbps from $35 and 1 Gig from $55 with Auto Pay. Always compare the quote for your ZIP.