What Relined does

Relined Fiber Network B.V. is a Dutch dark fiber infrastructure provider founded in 2003 and headquartered in Vianen, Netherlands. The company operates a 50,825+ km fiber network spanning the Netherlands, Germany, and Denmark, including a COBRA submarine cable to the Nordics and metro networks in Amsterdam (20–30 datacenters connected) and Frankfurt (20+ datacenters), with 120+ redundantly connected datacenters across the footprint. Routes are predominantly along TenneT high-voltage power pylons and ProRail railway embankments, providing physically secure corridors with low attenuation.

The core product is Dark Fiber — unlit, undivided optical fiber leased to customers who install their own optical equipment and gain full control over bandwidth, encryption, and routing. Relined layers on Wavelength Division Multiplexing (WDM) services (10 Gbit/s to 400+ Gbit/s, with private connection, private network, and optical-layer encrypted variants), Ethernet services (1 Gbit/s to 400+ Gbit/s), Cloud Connectivity, Datacenter Connectivity, and Peering via the integrated NDIX platform. Optical-layer encryption is delivered in collaboration with Fujitsu and ADVA.

Relined is a wholly-owned subsidiary of TenneT, the Dutch state-owned electricity transmission system operator, and operates German subsidiary Relined GmbH as well as Stuttgart-based Globalways GmbH (acquired November 2020). Revenue is generated primarily through monthly recurring fiber and WDM subscriptions plus one-time connection build fees, sold via a consultative, account-manager-led direct sales motion to enterprise, healthcare, education, government, system integrator, ISP, network operator, datacenter, and media & entertainment customers. The company holds ISO 27001 and ISO 9001 certifications and is positioning for NIS2 compliance.

Name

Relined

Legal name

Relined B.V.

Website

https://relined.eu

Company type

Private

Founded year

2003

Operating status

Operating

Headcount range

11–50 employees

Short description

Relined Fiber Network is a Dutch dark fiber and WDM infrastructure provider serving enterprise, government, healthcare, and datacenter customers across the Netherlands, Germany, and Denmark via a 50,825+ km owned-and-leased fiber network. It is a wholly-owned subsidiary of Dutch state-owned TSO TenneT.

Ownership category

akta.pro rank

Product category

Telecommunications Infrastructure / Dark Fiber Network Services

akta.pro primary industry

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

akta.pro secondary industries

Cross-Border Terrestrial Fiber Corridors & International Terrestrial Gateways (HDAIALAH), Subsea & Terrestrial Backhaul to Data Centers and Cloud On-Ramps (IX/DC Interconnect) (HDAIALAJ), Neutral-Host Fiber & Shared Access Network Operators (HDAIACAJ)

Keywords

• Dark fiber networks
• Fiber optic connectivity
• WDM services
• Datacenter connectivity
• Enterprise network infrastructure

Headquarters

HQ city

Vianen

HQ country

Netherlands

HQ region

Europe

Offices5 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. Dark Fiber Rental: Monthly recurring rental fee for dark fiber infrastructure, covering network management, maintenance, troubleshooting, and fiber rental. Price depends on the length of the connection.
2. Connection Setup / One-time Build Fees: One-time costs for constructing the connection and laying the network, dependent on the design and required materials. Combined with monthly fees for a complete solution.
3. Ethernet Services: Ethernet connectivity services billed on a subscription basis, with speeds scalable from 1 Gbit/s to 400 Gbit/s and above.
4. WDM Solutions (Private Connection, Private Network, Encrypted): Wavelength Division Multiplexing services billed as recurring subscriptions, including professional network management and dedicated infrastructure.
5. Peering Services (via NDIX): Public and private peering services enabling direct internet traffic exchange. Offered at marketplace locations in the Netherlands and Germany.

Pricing tiers

Go-to-market motion2 records

Distribution channels1 record

Marketing channels6 records

Core offering

Relined Fiber Network supplies dark fiber (unlit optical fiber) connections that are reliable and stable across the Netherlands, Germany, and Denmark, enabling organizations to deploy their own equipment and control bandwidth, encryption, and network design. Its portfolio is built on a 50,825+ km owned and partner fiber footprint, complemented by managed WDM, Ethernet, cloud connectivity, and NDIX-based peering services for enterprise, public sector, ISP, and datacenter customers.

Product overview

Relined Fiber Network is a Dark Fiber provider offering high-quality connectivity across Northwest Europe. The core product is Dark Fiber (unlit fiber optic cables), complemented by WDM (Wavelength Division Multiplexing) services for maximum capacity (up to 400+ Gbit/s), Ethernet connectivity (1-400 Gbit/s), Cloud Connectivity, Peering via the NDIX network, VLAN services, and Datacenter Connectivity. The company operates longhaul networks in the Netherlands, Germany, and Denmark, plus metro networks in Amsterdam and Frankfurt. The portfolio is delivered via dedicated infrastructure with professional network management and 24/7 support.

Differentiator

Problem solved

Functional benefit

Products and services

• Dark Fiber Unlit fiber optic cables providing private, undivided, and scalable network connections. Customers use their own equipment to light the fiber, gaining full control over bandwidth, encryption, and network configuration. Available nationwide across the Netherlands, Germany, and Denmark, plus metro networks in Amsterdam and Frankfurt, and an offshore connection to Denmark via the COBRA cable.
• Ethernet Services Scalable high-capacity Ethernet connectivity for data traffic ranging from 1 Gbit/s to 400 Gbit/s and beyond. Provides direct, secure connections between locations, datacenters, and partners with low latency, ring structures, and redundant configurations.
• WDM (Wavelength Division Multiplexing) Wavelength Division Multiplexing services that multiplex multiple data streams over a single fiber with capacities from 10 Gbit/s up to 400 Gbit/s and higher per connection. Offered in three variants: WDM Private Connection (point-to-point), WDM Private Network (custom-built with specific latency/redundancy requirements), and WDM Encrypted (optical-layer encryption).
• Cloud Connectivity Connectivity services enabling fast and simple connections between different datacenters and cloud platforms without the customer having to manage a complete network.
• Peering Services Public and private internet traffic exchange between networks without per-bit costs. Offers public peering VLAN (ISP Unicast) supporting IPv4 and IPv6, and private peering via dedicated VLAN. Available at NDIX marketplace locations in the Netherlands and Germany.
• NDIX Services Advisory and connection services utilizing the NDIX network platform for connecting customers and helping them select service providers.
• VLAN Services VLAN services enabling easy and fast connection of multiple customers using the trusted NDIX network.
• Datacenter Connectivity Direct connections to datacenters enabling organizations to connect their network infrastructure with strategic datacenter locations.

Quantifiable outcome

• Network reduced from 36 km to 14 km between Amsterdam Zuidoost and Science Park
• +3 more outcomes

Named customers9 records

Segments9 records

Ideal customer profiles5 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature7 records

Partnerships

Five partnerships are on record, tiered core and minor.

• Globalways GmbH (acquired from Datacenter One)coreOthers · 1 November 2020Relined acquired Globalways GmbH from Datacenter One in November 2020. Globalways, based in Stuttgart, had been providing professional IT services with maximum data security to customers in Germany for over ten years. The entire organization was acquired including all services and employees. This acquisition strengthened Relined's position in the German market and enabled better utilization of its nationwide dark fiber backbone.
• DATA CASTLE (DCD Data Center Developers + Angelo Gordon)coreStrategic or Co-development PartnerStrategic partnership for the development of advanced data centers in Germany. DATA CASTLE — a joint venture between DCD Data Center Developers and global US investment manager Angelo Gordon — is building FRA1 in Frankfurt and BER1 in Berlin (expected operational end 2026). Relined provides dark fiber connectivity to these new facilities, expanding routing options, capacity, and redundancy for Relined customers. The collaboration may extend to the broader DACH region.
• NDIXcoreTechnology or IntegrationThe NDIX network is integrated into Relined's fiber network, enabling an extensive peering platform. Organizations at marketplace locations in the Netherlands and Germany can exchange traffic directly with other connected parties automatically and without cost settlement. NDIX services are offered as part of Relined's product portfolio.
• TenneTcoreOthersTenneT is the Dutch state-owned electricity transmission system operator and the parent company of Relined. Relined was founded in 2003 to market the unused capacity of ProRail and TenneT's fiber networks. TenneT's ownership provides Relined with a long-term-oriented capital structure and strategic backing.
• ProRailminorOthersRelined was established in 2003 to market the unused capacity of ProRail's (and TenneT's) fiber networks. ProRail's fiber infrastructure along railway embankments forms part of the dark fiber network available to Relined customers.

Scale indicators7 records

Recent moves7 records

Expansion highlights5 records

Market position

Competitive moat6 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/relined
• Xx.com/RelinedFiber

Compliance3 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles6 records

Subsidiaries1 record

Funding overview

Funding rounds

Investors

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

M&A1 record

Investments

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

Frequently asked questions about Relined