Underline Infrastructure
Underline Infrastructure is a venture-backed open-access fiber network operator that designs, finances, builds, and operates multi-purpose fiber networks for U.S. municipalities, serving residential, SMB, enterprise, and MDU customers across Colorado Springs, Fountain, and El Paso County, Colorado.
- Company typePrivate
- Founded2020
- HeadquartersNew York, United States
- Headcount51–100
- GTM typeB2B and B2C
- OfferingServices
What Underline Infrastructure does
Underline Infrastructure is a venture-backed private company that designs, finances, builds, and operates open-access fiber networks for U.S. municipalities, targeting communities that lack fast, affordable, and fair internet connectivity. Founded in March 2020 and headquartered in Colorado Springs, Colorado, the company currently serves residential, small/medium business, enterprise, multi-dwelling unit, and ISP-on-network customers in Colorado Springs, Fountain, and (as of 2026) the broader El Paso County region. Its core technology stack combines point-to-point Active Ethernet fiber architecture, software-defined networking (SDN), and a LiDAR-based network design system with two-centimeter accuracy to deploy dedicated symmetrical gigabit and multi-gigabit services rather than shared splitter architectures. The platform enables a consumer-facing marketplace where multiple ISPs compete on neutral infrastructure, allowing near-instant provider switching without truck rolls.
Underline's business model rests on two complementary revenue streams: recurring subscription fees from residential and commercial subscribers (priced $45 to $225 per month across 500 Mbps to 10 Gbps symmetrical tiers) and marketplace economics from multiple ISPs operating on its network. The company employs a hybrid go-to-market combining direct-to-consumer self-service sign-up, enterprise field sales targeting municipal and city-leader engagements, and wholesale ISP partnerships on the open-access marketplace. Pricing is all-inclusive with no equipment rental fees, and Underline Impact (a 2024-launched nonprofit program) extends subsidized connectivity to low-income households. Capital is sourced from institutional investors under a fully-funded model that requires no community capital expenditure, with a total of approximately $42.4 million raised across a 2020 seed, 2022 SEC-registered exempt offering of approximately $7.37 million (part of a $9.74 million filing), and a 2022 round of approximately $35 million.
The company maintains SOC2, ISO 27001, and PCI-DSS certifications across its data centers and software systems, requires all on-network ISPs to sign a pledge on net neutrality and privacy, and holds privacy positions that prohibit sale of identifiable or de-identified personal data. Leadership is founder-led by CEO Bob Thompson (former SVP at Guardian Life and capital markets experience at UBS and CIBC), supplemented by a CCO appointment in 2025 and a technical team with prior experience at Google Fiber, AT&T, and Verizon.
Underline Infrastructure firmographics
Firmographics- Name
- Underline Infrastructure
- Legal name
- Underline Infrastructure, LLC
- Website
- https://underline.com
- Company type
- Private
- Founded year
- 2020
- Operating status
- Operating
- Headcount range
- 51–100 employees
- Short description
- Underline Infrastructure is a venture-backed open-access fiber network operator that designs, finances, builds, and operates multi-purpose fiber networks for U.S. municipalities, serving residential, SMB, enterprise, and MDU customers across Colorado Springs, Fountain, and El Paso County, Colorado.
- Ownership category
- akta.pro rank
Underline Infrastructure industry classification
Industry- Product category
- Open-Access Fiber Internet Services
- NAICS
- Wired Telecommunications Carriers (517111)
- SIC
- Telephone Communications (No Radiotelephone) (4813)
- akta.pro primary industry
- Neutral-Host Fiber & Shared Access Network Operators (HDAIACAJ)
- akta.pro secondary industries
- Fiber ISPs (FTTH/FTTP Retail Providers) (HDAIADAE), Municipal & Community Broadband Networks (HDAIACAE), Municipal & Community Broadband ISPs (HDAIADAH)
Keywords
Where Underline Infrastructure is headquartered
LocationHeadquarters
- HQ city
- New York
- HQ country
- United States
- HQ region
- North America
Offices1 record
Markets served
Underline Infrastructure business model
Business model- GTM type
- B2B and B2C
- Offering type
- Services
- Cost components
- Infrastructure, Supply Chain, Technology or R&D, Personnel, Operations, Marketing or Sales
Revenue model
- Internet Access Subscription: Monthly recurring fees from ultra-fast fiber internet access provided to residential and commercial subscribers. Underline bills customers a unified monthly fee that includes access charges and service provider charges.
- Open Access Marketplace: Revenue from hosting multiple ISPs on their neutral network infrastructure, where service providers compete for end customers through the Underline marketplace platform.
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| Subscription | Monthly | 500/500 Mbps symmetric fiber internet |
| Subscription | Monthly | 1/1 GIG symmetric fiber internet |
| Subscription | Monthly | 2.5/2.5 GIG symmetric fiber internet |
| Subscription | Monthly | 5/5 GIG symmetric fiber internet |
| Subscription | Monthly | 10/10 GIG symmetric fiber internet |
Go-to-market motion2 records
Distribution channels5 records
Marketing channels5 records
Underline Infrastructure product offering
Product offeringCore offering
Underline Infrastructure builds, finances, and operates neutral open-access fiber networks delivering ultra-fast symmetrical internet (500 Mbps to 10 Gbps) to residential and business subscribers in U.S. communities. The company sells fiber internet subscriptions, business connectivity services, MDU solutions, and community-wide network deployments to municipalities, while operating an SDN-powered marketplace that lets multiple ISPs compete on a single physical network. Additional revenue is generated by licensing the underlying technology to other network owners and providing network design, construction, operations, and maintenance services.
Product overview
Underline Infrastructure offers a comprehensive open-access fiber network platform designed to serve as an operating system for communities. The core offering consists of multi-purpose fiber networks delivering ultra-fast internet access with symmetrical speeds up to 10 Gbps, powered by a software-defined networking platform that enables the Underline Marketplace for consumer choice. Additional offerings include business internet services, MDU solutions, and professional services for network design, construction, operation, and potential community ownership transfer. The company also operates Underline Impact, a nonprofit program supporting low-income connectivity.
Differentiator
Problem solved
Functional benefit
Brands
- Underline Impact: First-of-its-kind nonprofit program launched in March 2024 providing internet access support for low-income households.
Products and services
- Underline Fiber Internet (Residential) Ultra-fast fiber internet service for residential subscribers with symmetrical speeds from 500 Mbps to 10 Gbps, no data caps, no contracts, transparent all-inclusive pricing, free equipment and installation, and the ability to switch service providers through the Underline marketplace.
- Underline Business Internet Services Multi-gigabit fiber internet for small and medium businesses, with enterprise-grade connectivity options, dedicated local support, voice services, and provider competition through the open-access marketplace.
- Multi-Purpose Community Fiber Networks End-to-end community fiber network solutions for municipalities and city governments covering engineering, private financing, construction, and operation, designed to support broadband plus modernized water systems, transit, energy, and smart city applications.
- Underline Marketplace (Open-Access ISP Platform) Software-defined marketplace platform on which multiple internet service providers compete to deliver internet, TV, telehealth, entertainment, and other services to subscribers over Underline's neutral fiber network, with instant provider switching via click-of-a-button provisioning.
- MDU (Multi-Dwelling Unit) Connectivity Services Fiber connectivity solutions for multi-dwelling unit buildings including apartments and condominiums, providing property owners, landlords, and real estate developers with managed broadband for residents.
- Network Design & Engineering Services Data-driven network design and engineering services using LiDAR-based 3D modeling and optimization algorithms to engineer community-specific fiber network architectures.
- Network Construction Services End-to-end fiber network construction services delivered through industry-leading EPC partners with real-time production visibility, metric-driven workforce management, and adherence to strict safety protocols.
- Network Operations & Maintenance Ongoing network operations, scheduling, troubleshooting, outage management, and customer service delivered through Underline's software-defined approach to managing fiber networks.
- Community Transfer Option Optional purchase right for partner communities to acquire the Underline-built fiber network after it is built, fully stabilized, and de-risked, providing a path to community ownership.
- Software-Defined Networking (SDN) Platform Licensing Licensable SDN platform that powers open-access networks, enabling instant provider switching with click-of-a-button provisioning, private dedicated connections between application providers and end users, and multi-purpose smart city infrastructure capabilities.
Quantifiable outcome
- Point-to-point architecture ensures each subscriber receives dedicated fiber port at full 1 Gbps or optional 10 Gbps, compared to competitors sharing ports among 16-64 homes causing congestion
- +1 more outcomes
Companies that use Underline Infrastructure
Customer profileNamed customers7 records
Segments5 records
Ideal customer profiles5 records
Underline Infrastructure technology and API
TechnologyTechnology focussed Yes
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Feature5 records
Underline Infrastructure partnerships and signals
Strategic signalPartnerships
Four partnerships are on record, tiered core.
- InCoax Networks ABcoreInCoax Networks AB received an initial deployment order from Underline for its in-building broadband access platform and CPE units through strategic partner CTIconnect. The deployment supports Underline's open-access fiber network operations in Colorado and El Paso County, covering more than 100,000 planned fiber gigabit-plus connections. This marks InCoax's entry into the US market with a scalable rollout model.
- CTIconnectcoreCTIconnect serves as the strategic partner that secured the InCoax deployment order with Underline, acting as a channel partner in the equipment procurement process.
- Engineering, Procurement, and Construction (EPC) FirmscoreUnderline partners with the nation's largest and industry-leading EPC firms for network construction, leveraging their experience and success track record. Underline manages the entire construction process with adherence to strict safety protocols and metric-driven workforce management.
- Service Providers on Underline NetworkcoreMultiple ISPs operate on Underline's open access network, offering internet, TV, telehealth, entertainment, and other services. All service providers must sign a pledge committing to net neutrality, transparency, and best practices in privacy and security.
Scale indicators4 records
Recent moves9 records
Expansion highlights6 records
Underline Infrastructure competitors and assessment
Company assessmentMarket position
Competitive moat6 records
Key risks5 records
Key highlights6 records
Customer concentration
Underline Infrastructure social profiles
Digital presenceUnderline Infrastructure compliance and trust
Trust signalCompliance3 records
Underline Infrastructure financial estimates
Financial estimateRevenue estimate
Valuation estimate
Underline Infrastructure leadership team
Management profileNumber of profiles
Profiles6 records
Underline Infrastructure funding detail
Funding detailFunding overview
Funding rounds3 records
Investors2 records
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Underline Infrastructure M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about Underline Infrastructure
What does Underline Infrastructure do?
Underline Infrastructure builds, finances, and operates neutral open-access fiber networks delivering ultra-fast symmetrical internet (500 Mbps to 10 Gbps) to residential and business subscribers in U.S. communities. The company sells fiber internet subscriptions, business connectivity services, MDU solutions, and community-wide network deployments to municipalities, while operating an SDN-powered marketplace that lets multiple ISPs compete on a single physical network. Additional revenue is generated by licensing the underlying technology to other network owners and providing network design, construction, operations, and maintenance services.
Is Underline Infrastructure a public or private company?
Underline Infrastructure is a private company. It is classified as venture growth investor backed and is currently operating.
When was Underline Infrastructure founded?
Underline Infrastructure was founded in 2020. It employs 51 to 100 people.
Where is Underline Infrastructure based?
Underline Infrastructure is headquartered in New York, United States, in the North America region.
How does Underline Infrastructure make money?
Two revenue lines are on record. Internet Access Subscription is the primary driver. The others are open Access Marketplace.
Does Underline Infrastructure have an API?
No public API is recorded for Underline Infrastructure.
What industry is Underline Infrastructure in?
Underline Infrastructure's product category is Open-Access Fiber Internet Services. Its primary akta.pro industry code is HDAIACAJ, Neutral-Host Fiber & Shared Access Network Operators, with a secondary code of HDAIADAE, Fiber ISPs (FTTH/FTTP Retail Providers). Its NAICS code is 517111 and its SIC code is 4813.