What Bandwidth IG does

Bandwidth IG, doing business as BIG Fiber, is a private U.S. dark fiber infrastructure provider founded in 2019 and headquartered at 530 Lakeside Drive, Suite 190, Sunnyvale, California. The company builds and operates 100% underground metro dark fiber networks serving data center operators and large enterprises in three metropolitan markets: the San Francisco Bay Area, Greater Atlanta, and Greater Portland. Its core product is dedicated, unlit fiber connectivity between customer endpoints, with the underground architecture and engineered routing positioned to reduce signal loss, latency, and route diversity limitations typical of legacy fiber networks.

The product portfolio consists of four offerings: the underlying BIG Fiber Dark Fiber Network, Data Center Connect for inter-facility connectivity, Corporate Connect for enterprise network needs, and Custom Data Center Solutions for bespoke network builds. Differentiation rests on purpose-built underground infrastructure, strategic placement in routes where incumbent providers do not operate, deep local market knowledge applied to custom network design, and a smaller organizational footprint enabling faster execution than large incumbent carriers. There are no patents, AI capabilities, or software products disclosed in source materials; the moat is fundamentally physical and geographic.

Revenue is generated through long-term infrastructure service agreements (IRUs or leases) that provide dedicated fiber connectivity between customer locations on a recurring subscription basis. The go-to-market is enterprise field sales — direct engagement with data center operators and large enterprises requiring customized network design. Pricing is quote-based, dependent on route scope, distance, and customization, and is not publicly disclosed. In 2025 the company secured $250 million in debt financing led by Stonepeak Credit with participation from La Caisse to fund further network expansion. Earlier-stage capital included an October 2020 round from SDC Capital Partners as lead investor. Jim Nolte holds the CEO role.

Name

Bandwidth IG

Legal name

BIG Fiber

Website

https://bandwidthig.com

Company type

Private

Founded year

2019

Operating status

Operating

Headcount range

11–50 employees

Short description

BIG Fiber (formerly Bandwidth IG) is a private U.S. dark fiber provider operating 100% underground metro fiber networks for data center operators and large enterprises across the San Francisco Bay Area, Greater Atlanta, and Greater Portland, delivering dedicated low-latency connectivity under long-term service agreements.

Ownership category

akta.pro rank

Product category

Dark Fiber Network Infrastructure

NAICS

Wired Telecommunications Carriers (517111), Wired and Wireless Telecommunications (except Satellite) (5171)

akta.pro primary industry

Wholesale Wavelength, Spectrum & Dark Fiber Providers (IRU/Leases) (HDAIALAI)

Keywords

• Dark fiber networks
• Metro fiber infrastructure
• Data center connectivity
• Enterprise fiber solutions
• Underground fiber networks

Headquarters

HQ city

Sunnyvale

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

Infrastructure, Operations, Personnel, Technology or R&D, Marketing or Sales

Revenue model

1. Dark Fiber Infrastructure Services: Provider of dark fiber network infrastructure to enterprises and data centers. Revenue is generated through long-term infrastructure service agreements providing dedicated fiber connectivity between locations.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels5 records

Core offering

Bandwidth IG (operating as BIG Fiber) provides purpose-built, 100% underground metro dark fiber network infrastructure to data centers and enterprises. The company delivers high-capacity, low-latency dedicated fiber connectivity solutions across three U.S. metropolitan markets (San Francisco Bay Area, Greater Atlanta, and Greater Portland), with offerings spanning data center interconnect, corporate network connectivity, and custom-built fiber solutions under long-term service agreements.

Product overview

BIG Fiber offers a portfolio of dark fiber network solutions serving data centers and enterprises across three major metro markets: San Francisco Bay Area, Greater Atlanta, and Greater Portland. The company's product suite consists of four core offerings: the main Dark Fiber Network infrastructure providing high-volume, low-latency connectivity; Data Center Connect for tying data centers together; Corporate Connect for enterprise network needs; and Custom Data Center Solutions for bespoke builds. All infrastructure is 100% underground with intentionally designed routing to reduce signal loss and latency.

Differentiator

Problem solved

Functional benefit

Products and services

• BIG Fiber Dark Fiber Network Metro dark fiber network infrastructure providing high-volume, low-latency connectivity for enterprises and data centers across three U.S. metropolitan markets. The 100% underground network is intentionally designed to reduce signal loss and latency with maximum diversity and scalable inventory.
• Data Center Connect Dark fiber solution enabling enterprises to connect their data centers together with new, low-latency infrastructure for high-capacity inter-facility connectivity. Targeted at data center operators requiring dedicated, scalable fiber between facilities.
• Corporate Connect Network solutions for corporate enterprises requiring dedicated fiber connectivity for their business operations. Provides corporate customers with high-capacity, reliable fiber infrastructure to connect enterprise locations.
• Custom Data Center Solutions Custom-built fiber network infrastructure designed to meet unique customer-specific requirements and challenges. Provides bespoke network designs tailored to address significant and specific customer infrastructure needs.

Segments2 records

Ideal customer profiles2 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature3 records

Scale indicators2 records

Recent moves5 records

Expansion highlights5 records

Broad incumbents

• Lumen Technologies: Major incumbent carrier with a national fiber footprint offering dark fiber, wavelengths, and managed network services. Operates broadly across telecom but overlaps with BIG Fiber in metro dark fiber to data centers and enterprises.
• Consolidated Communications: Regional incumbent telecom offering fiber-based services including enterprise dark fiber and wavelength connectivity to business customers across multiple US geographies.
• Crown Castle Fiber: Owns and operates extensive metro fiber networks (legacy Lightpath / Sidera) serving enterprise and carrier customers. A larger incumbent with overlapping dark fiber and enterprise connectivity offerings.

Direct peers

• Lightpath (Altice USA): Operates metro fiber networks serving enterprise, education, and carrier customers with dark fiber and lit services. Direct comparable in the metro dark fiber segment with similar custom enterprise focus.
• FiberLight: Metro dark fiber provider serving enterprises, hyperscalers, and carriers with high-capacity fiber infrastructure across multiple US markets. Closely comparable in business model and customer focus to BIG Fiber.
• Zayo Group: One of the largest US providers of dark fiber, wavelength, and lit services to enterprises, hyperscalers, and carriers across metro and long-haul markets. Most directly comparable to BIG Fiber as a wholesale dark fiber infrastructure provider.

Others

• TeleGeography: Telecom market research and data provider — adjacent/ecosystem participant that maps global fiber networks and tracks wholesale pricing relevant to dark fiber operators like BIG Fiber.
• Cyxtera Technologies: Data center colocation provider with interconnected facilities that consume metro dark fiber. Relevant ecosystem peer representing the customer-side demand for high-quality enterprise fiber connectivity.
• CoreSite / American Tower Data Centers: Major data center operator with deep fiber connectivity into its facilities. Comparable as a buyer of metro dark fiber rather than a builder, and a critical customer ecosystem for wholesale dark fiber providers like BIG Fiber.

Regional players

• Extenet (ExteNet Systems / Vertical Bridge): Designs, builds, and operates fiber and wireless infrastructure primarily for carriers and enterprises across distributed US markets, with overlap in dark fiber and enterprise connectivity services.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat4 records

Key risks6 records

Key highlights6 records

Customer concentration

• Xx.com/BandwidthIg
• LinkedInlinkedin.com/company/bandwidth-ig

Revenue estimate

Valuation estimate

Number of profiles

Profiles2 records

Funding overview

Funding rounds1 record

Investors1 record

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Bandwidth IG