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01 / Dedicated fiber
Enterprise fiber
A private fiber circuit built to your building, with symmetrical bandwidth from 100 Mbps to 100 Gbps and a written SLA. We quote it from every carrier lit at your address and compare the results side by side.
The short answer
Reviewed September 2026
Enterprise fiber is a dedicated fiber-optic circuit installed for one customer, delivering symmetrical, unshared bandwidth, typically 100 Mbps to 100 Gbps, backed by a service-level agreement for uptime, latency and repair time. It costs more than shared broadband because the carrier reserves the capacity for you alone.
Typical speeds
100 Mbps – 100 Gbps, symmetrical
Typical monthly cost
$600 – $1,300 for 1 Gbps; higher above 10 Gbps
Install interval
2–6 weeks on-net · 60–120 days with construction
SLA
99.99% uptime, 4-hour repair, latency and packet-loss targets
What it is
Enterprise fiber (often sold as dedicated fiber internet or fiber DIA) is a glass strand (or a wavelength on one) terminated in your building and reserved for your traffic. Upload and download speeds are identical, bandwidth is committed rather than “up to,” and the carrier signs an SLA that pays credits when they miss. On-net means the carrier already has fiber in the building; near-net means they must build from the street, which is where install fees and long intervals come from.
When it is the right choice
Any site that runs the business on its connection: headquarters, clinics, plants, studios, and offices with cloud-hosted phones or heavy upload traffic. If a one-hour outage costs more than the difference between broadband and fiber for a month, you want enterprise fiber, usually with a diverse backup path behind it.
What we compare
Every quote is normalized to five numbers: monthly recurring cost including taxes and amortized install, committed speed, contract term and renewal window, build interval, and the SLA with its actual credit schedule. Then we mark the one we would sign and say why.
Carriers we quote
AT&T, Verizon, Lumen, Zayo, Lightpath, Spectrum Business, Comcast Business, Cox, Frontier, FiberLight, LOGIX, Uniti, VinaKom and the regional fiber builders serving your address. See the full list on the Carriers page.
See all carriers
Typical pricing
What enterprise fiber usually costs
A dedicated fiber circuit typically costs $350–$650 a month at 100 Mbps, $600–$1,300 at 1 Gbps and $1,200–$2,900 at 10 Gbps on a 36-month term. The single biggest variable is whether the carrier is already in your building: on-net circuits price toward the low end and install in weeks; off-net circuits carry roughly a 20 percent premium or a construction charge, and carriers usually waive one-time fees under $1,000 to win the order. Above 10 Gbps, wavelengths and dark fiber are priced case by case. A 10 Gbps wave between data centers has been quoted under $1,000 a month, and a dark-fiber pair within a metro runs from under $1,000 to several thousand depending on route.
| Tier | Typical monthly | Market average |
|---|---|---|
| 100 Mbps | $350 – $650 | ≈ $500 |
| 1 Gbps | $600 – $1,300 | ≈ $900 |
| 10 Gbps | $1,200 – $2,900 | ≈ $2,000 |
| Wave / dark fiber | Case by case | 10G wave from < $1,000 |
Industry benchmark ranges for US quotes on 36-month terms, 2025–2026. Reviewed September 2026. Your address, term and whether a carrier is already in the building move the number, and that is exactly what we quote.
Learn the lingo
Enterprise Fiber terms, explained plainly.
The words carriers use in quotes and contracts, and what they mean for your bill. Ask us anything we missed.
What does “on-net” mean?
A carrier is on-net when its fiber already terminates in your building, so a new circuit is a configuration change rather than a construction project. On-net carriers install in weeks and usually price lower. Near-net or off-net carriers must build to you, which adds a construction interval and often an install fee.
What is the difference between enterprise fiber and business fiber?
Business fiber (AT&T Business Fiber, Frontier Business Fiber, Verizon Fios Business) is a shared, best-effort service sold at consumer-style prices, often asymmetrical and without a meaningful SLA. Enterprise or dedicated fiber reserves the bandwidth for you and carries a contractual SLA. Many sites are well served by business fiber as a primary or backup link; the difference shows up in the contract, not the cable.
What is MRC?
Monthly recurring cost: the fixed monthly price of a circuit, usually quoted before taxes and regulatory surcharges. We compare MRC after adding those and after amortizing any one-time install or construction charge across the term.
What is an SLA and what does it actually pay?
A service-level agreement is the carrier’s written commitment on uptime (usually 99.99% for dedicated fiber), latency, packet loss, jitter and mean time to repair. When they miss, you receive bill credits, typically a percentage of that month’s MRC. Credits rarely cover the real cost of an outage, so the SLA is best read as a signal of how the carrier engineered the circuit.
What is a wavelength?
A dedicated color of light on a shared fiber strand, sold as a private point-to-point circuit at 10, 100 or 400 Gbps. Wavelengths connect data centers and large campuses; for a single office needing internet access, dedicated internet over fiber is the right product.
What is dark fiber?
Unlit fiber strands leased from a carrier that you light with your own equipment. It gives you unlimited capacity and full control but makes you the network operator. It suits large campuses and data-center interconnects, not typical offices.
How long does enterprise fiber take to install?
Two to six weeks when a carrier is on-net. If the carrier has to bring fiber from the street, expect 60 to 120 days and sometimes longer for right-of-way permits. We ask every carrier to state a firm construction interval before you sign.