Quantum Fiber Review
Fiber with price-lock guarantee up to 8 Gbps
Overall Rating
Based on our testing (How we rate)
Quick Answer
Quantum Fiber scores 8/10 in our testing. It's best for price for life and no data caps. Key strength: Price for life guarantee. Main weakness: DSL speeds very slow in many areas.
Quick Summary
Quantum Fiber (formerly CenturyLink) offers fiber internet across 36 states with speeds up to 8 Gbps. Known for price-lock guarantees, no data caps, and straightforward pricing.
Pros & Cons
What we like
- Price for life guarantee
- No data caps
- No contracts required
- Fiber expanding to more areas
- Simple pricing structure
- Good customer service ratings
What could be better
- DSL speeds very slow in many areas
- Fiber availability limited
- Aging infrastructure in some regions
Quantum Fiber Pricing
- Up to 100 Mbps
- Price for life
- No data caps
- No contract
- 940 Mbps symmetric
- Price for life
- No data caps
- Free router
- 8000 Mbps symmetric
- Price for life
- No data caps
- Premium equipment
Key Features
Quantum Fiber In-Depth Review
Quantum Fiber is Quantum Fiber (formerly CenturyLink) offers fiber internet across 36 states with speeds up to 8 Gbps. Known for price-lock guarantees, no data caps, and straightforward pricing. With an overall rating of 8/10 based on our testing, it delivers strong performance across key metrics in the internet providers space.
Key Findings
- Price for life guarantee: This stands out in our testing as a key strength of Quantum Fiber.
- No data caps: This stands out in our testing as a key strength of Quantum Fiber.
- No contracts required: This stands out in our testing as a key strength of Quantum Fiber.
Performance & Speed
Quantum Fiber delivered solid performance in our testing. Price for life guarantee.
Features & Functionality
Quantum Fiber includes self install, mobile app. The features cover the essentials, though power users may find some gaps compared to premium alternatives. We particularly appreciated price for life guarantee.
Pricing & Value
Quantum Fiber pricing starts at $45/month. The premium pricing is justified if you need the advanced features, but may be overkill for basic use cases.
Ease of Use
Quantum Fiber's interface has a moderate learning curve. Most users will get comfortable within a few sessions. There's room for UX improvements, but core functionality is accessible.
Our Testing Methodology
We tested this internet provider extensively over several weeks, evaluating real-world performance, ease of use, and value for money.
- Users who prioritize price for life guarantee
- Users looking for a solid, capable option
- Users who can't accept dsl speeds very slow in many areas
- Budget-restricted users who need a more affordable option
The Bottom Line
Quantum Fiber is a solid performer that works well for most users. Its strength in price for life guarantee makes it worth considering, though dsl speeds very slow in many areas may affect certain users.
Affiliate Disclosure
Some products are sponsored. Rankings reflect our honest assessment. Our editorial content is independent and unbiased. We may earn a commission if you make a purchase through our links. Read our full disclosure
Starting from
$45/mo
- Best High Speed Internet for StreamingFast, reliable internet for Netflix, gaming, and 4K video
- Best High Speed Internet for GamingLow latency and fast speeds for online gaming
- Best Internet for Working from HomeReliable upload speeds for video calls and file sharing
- Best Internet for Large FamiliesHandle multiple devices and heavy usage
- Best Internet for Smart Home DevicesReliable connectivity for IoT and smart devices
- Best Internet for Rural AreasBroadband options for areas with limited coverage
- Best Internet for ApartmentsFlexible plans without long-term contracts
- Best Fiber Internet ProvidersGigabit speeds with fiber optic technology
- Best Cable Internet ProvidersWidely available high-speed cable internet
- Best Satellite Internet ProvidersInternet anywhere with satellite coverage
- Best 5G Home InternetFixed wireless 5G for home broadband
- Best Gigabit Internet Providers1000 Mbps speeds for power users
- Best Internet with No Data CapsTruly unlimited internet without throttling
- Best Cheap High Speed InternetAffordable broadband that doesn't break the bank
- Best No-Contract InternetMonth-to-month flexibility without commitments
Quantum Fiber FAQ
How much does Quantum Fiber cost?
Quantum Fiber starts at $45.00/mo for the Simply Unlimited plan. They also offer Fiber 500 ($50/mo), Fiber Gig ($70/mo), Fiber 8 Gig ($200/mo).
Is Quantum Fiber worth it in 2025?
Quantum Fiber scores 8/10 in our testing. Price for life guarantee. However, dsl speeds very slow in many areas.
What are the pros and cons of Quantum Fiber?
Pros: Price for life guarantee; No data caps; No contracts required. Cons: DSL speeds very slow in many areas; Fiber availability limited; Aging infrastructure in some regions.
Is Quantum Fiber safe to use?
Quantum Fiber is a legitimate internet providers service. We recommend reviewing their privacy policy for full details.
Is Quantum Fiber available in my area?
Quantum Fiber availability varies by location. Enter your zip code above to check if Quantum Fiber services your address.
What speeds does Quantum Fiber offer?
Quantum Fiber offers speeds varying by plan and location. Actual speeds depend on your location and infrastructure.