Delta Fiber

What Delta Fiber does

Delta Fiber Nederland B.V. is a privately held Dutch telecommunications company headquartered in Schiedam that operates an open, XGS-PON fiber-to-the-home network reaching approximately 1.7 million households and businesses across the Netherlands. Through its infrastructure arm DELTA Netwerk and an Ethernet Access Services (EAS) wholesale platform, the company sells passive and active wholesale capacity to more than 20 service providers — including Odido, VodafoneZiggo, T-Mobile, Freedom Internet, and Enreach NL — while directly serving consumers (DELTA), SMBs and enterprises (DELTA Zakelijk), and the Drenthe/Overijssel region via the RENDO Fiber joint venture. As of April 2026 the Caiway brand has been fully consolidated into DELTA, and the company is transitioning from a network-rollout phase toward customer activation on its existing footprint.

Name

Delta Fiber

Legal name

DELTA Fiber Nederland B.V.

Website

https://deltafiber.nl

Company type

Private

Founded year

2018

Operating status

Operating

Headcount range

501–1,000 employees

Short description

Delta Fiber is a Dutch open-network fiber operator, headquartered in Schiedam, that builds and wholesales XGS-PON infrastructure to 20+ service providers and serves 640,000+ consumer and business customers across the Netherlands.

Ownership category

akta.pro rank

Product category

Fiber Telecommunications Services

NAICS

Wired Telecommunications Carriers (517111), Wired and Wireless Telecommunications (except Satellite) (5171), Wired and Wireless Telecommunications Carriers (except Satellite) (51711)

SIC

Cable & Other Pay Television Services (4841), Radiotelephone Communications (4812)

akta.pro primary industry

Fiber ISPs (FTTH/FTTP Retail Providers) (HDAIADAE)

akta.pro secondary industries

Open-Access Fiber Network Operators (Wholesale-Only) (HDAIACAF), Rural & Universal Service Fixed Broadband Providers (HDAIABAJ), Fiber Optic Cabling (Singlemode/Multimode) (HDAFALAB)

Keywords

• Fiber broadband services
• Wholesale network access
• Business telecom solutions
• Television and mobile bundles
• Fiber network infrastructure

Headquarters

HQ city

Schiedam

HQ country

Netherlands

HQ region

Europe

Offices2 records

Markets served

GTM type

B2B and B2C

Offering type

Services

Cost components

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

Revenue model

1. Retail Telecommunications Services: Revenue from providing internet, television, fixed telephony, and mobile services to consumers and businesses under DELTA and Caiway brands. Customer base grew to over 640,000 users in 2025.
2. Wholesale Network Access: Revenue from wholesale partners (more than 20 service providers) delivering services over DELTA Fiber's open network, including Odido, VodafoneZiggo and others. This contributes to higher network utilization.
3. Network Construction Services: DELTA Netwerk builds and manages fiber networks throughout the Netherlands, contributing to network expansion revenue

Go-to-market motion3 records

Distribution channels5 records

Marketing channels6 records

Core offering

DELTA Fiber operates an open next-generation fiber-optic network (XGS-PON) across the Netherlands, delivering gigabit internet, interactive television, fixed telephony, and mobile services to consumers and businesses under the DELTA and DELTA Zakelijk brands. Through its wholesale arm DELTA Netwerk, the company enables more than 20 service providers — including Odido, VodafoneZiggo, and Freedom Internet — to resell broadband access over its shared infrastructure via Ethernet Access Services (EAS). Its portfolio also includes business-grade SD-WAN, premium "Unlimited Glasvezel" tiers reaching 8 Gbps, and the RENDO Fiber regional joint venture.

Product overview

DELTA Fiber is a Dutch telecom company operating an open, next-generation fiber-optic network (XGS-PON) across the Netherlands, reaching approximately 1.7 million households and businesses. The company operates as a platform-plus-brands model: DELTA Netwerk builds and manages the wholesale fiber network infrastructure and offers Ethernet Access Services (EAS) to over 20 service providers (including Odido, VodafoneZiggo, Freedom Internet, and T-Mobile). DELTA and DELTA Zakelijk are the primary retail brands serving consumers and businesses respectively, while Caiway is being consolidated into DELTA. The portfolio also includes RENDO Fiber (a regional joint venture in Drenthe/Overijssel), DELTA Mobiel (mobile services), and the DELTA Fiber Fonds (social donation initiative). The network supports symmetrical speeds up to 10 Gbps via XGS-PON, with consumer speeds of up to 8 Gbps and coax upgrades to 2 Gbps.

Differentiator

Problem solved

Functional benefit

Brands

• DELTA: Main consumer brand offering gigabit internet, interactive television, landline and mobile services
• DELTA Zakelijk
• Caiway

Products and services

• DELTA (Consumer Brand) Consumer-facing brand offering gigabit internet, interactive television, landline telephony, and mobile services over DELTA Fiber's open XGS-PON fiber network. DELTA is the primary national retail brand.
• DELTA Zakelijk (Business Brand) Business-focused brand offering superfast fiber connections for self-employed professionals, SMEs, and large enterprises, with customized solutions for sectors including healthcare, education, recreation, and government.
• DELTA Netwerk Infrastructure arm responsible for building, expanding, and managing the open fiber network across the Netherlands. Operates Ethernet Access Services (EAS) enabling wholesale partners to offer broadband services under their own brand without investing in physical network infrastructure.
• Caiway Second-largest fiber provider in the Netherlands; brand gradually merged into DELTA, with all customers fully transferred to DELTA by April 2026.
• RENDO Fiber Joint venture between DELTA Fiber and RE-NET providing fiber connectivity to Drenthe and Overijssel regions; over 55,000 households and businesses served as of 2025.
• DELTA Mobiel Mobile services offered by DELTA, including new data-centric subscription plans (FLEX Unlimited) and DELTA Mobiel offerings.
• DELTA Unlimited Glasvezel Premium fiber service tier offering the maximum achievable speed over the latest generation XGS-PON fiber technology.
• DELTA Zakelijk SD-WAN Software-Defined Wide Area Network service for business customers, enabling centralized management and optimization of wide-area network connections.
• RENDO Fiber (ZeelandNet) Regional brand providing internet services to the Zeeland province; wholly-owned subsidiary of DELTA Fiber.
• DELTA Fiber Fonds Charitable fund providing financial donations of 500 to 5,000 euros to non-profit organizations and foundations for digital equipment, WiFi infrastructure, or internet connections in DELTA Fiber-served areas.

Quantifiable outcome

• DELTA scored 962 out of 1000 points in Umlaut network test, rated 'outstanding', outperforming Odido (953), KPN (951), and Ziggo (942)
• +2 more outcomes

Named customers3 records

Segments3 records

Ideal customer profiles3 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration6 records

Feature3 records

Partnerships

Five partnerships are on record, tiered core and major.

• RENDO Fiber (RENDO)coreStrategic or Co-development Partner · 1 January 2017Joint venture between DELTA Fiber and RE-NET since 2017, providing fiber connectivity to regions in Drenthe and Overijssel. Through this collaboration, more than 55,000 households and companies have access to gigabit internet. RENDO contributes local knowledge and network management expertise, while DELTA Fiber adds construction and commercial expertise.
• OdidomajorChannel Partner/ Reseller/ DistributorWholesale partner delivering internet and TV services over DELTA Fiber's open fiber network, contributing to strong revenue growth alongside DELTA's own retail operations.
• VodafoneZiggomajorChannel Partner/ Reseller/ DistributorMajor telecom operator that entered into partnership to deliver services over DELTA Fiber's fiber-optic network as newest wholesale partner.
• T-MobilemajorStrategic or Co-development PartnerNetwork sharing partnership where DELTA Fiber and T-Mobile have made their networks fully available to each other, expanding service coverage for both parties.
• RE-NETcoreStrategic or Co-development PartnerPartner in RENDO Fiber joint venture, contributing local knowledge and ensuring adequate network management for Drenthe and Overijssel regions.

Scale indicators10 records

Recent moves8 records

Expansion highlights6 records

Direct peers

• KPN: Royal KPN is the incumbent Dutch telecom operator offering fixed broadband (including via Glaspoort JV), mobile, TV and business services. Directly competes with DELTA Fiber in both consumer FTTH and wholesale fiber access, and is the benchmark on network coverage and ARPU.
• VodafoneZiggo: VodafoneZiggo is the largest cable operator in the Netherlands (HFC network, Ziggo brand) and a major mobile provider. It is both a competitor to DELTA's consumer offering and a wholesale partner on DELTA's open fiber network, making it a hybrid direct peer.
• Odido: Odido (formerly T-Mobile Netherlands) is a major mobile operator that also delivers fixed broadband - including as a wholesale partner over DELTA Fiber's open network. Competes head-to-head in the consumer quad-play market and is one of DELTA's most important wholesale customers.
• T-Mobile Netherlands: T-Mobile Netherlands (part of Deutsche Telekom) provides mobile and fixed broadband in the Netherlands and has a network-sharing arrangement with DELTA Fiber. Operates in the same consumer and SME segments with overlapping product sets.
• Eurofiber: Eurofiber is a Belgian/Dutch open-access fiber infrastructure operator serving business customers and wholesale ISPs. Closely comparable to DELTA Netwerk's wholesale open-access fiber model across the Benelux region.

Emerging players

• Glaspoort: Glaspoort is a KPN/AAB joint venture deploying open-access fiber networks across the Netherlands. It is a direct competitor in fiber wholesale and was blocked by the ACM from acquiring 200K DELTA Fiber connections, indicating close strategic overlap.
• Freedom Internet: Freedom Internet is a Dutch independent ISP that delivers broadband services as a wholesale partner over DELTA Fiber's open network. Comparable as a fiber-only ISP business model and showcases the multi-tenant retail ecosystem DELTA enables.
• Online.nl: Online.nl (formerly Online Breedband / part of Eurofiber/Delta Group history) is a Dutch fiber ISP offering internet, TV and telephony. Comparable as a fiber-only retail ISP competing in the same Dutch consumer and SMB market as DELTA.
• Helden van Nu (NLconnect member ISPs): Helden van Nu is a Dutch fiber ISP active on multiple open-access networks including DELTA Fiber's. Representative of the long tail of smaller fiber ISPs that sell to consumers on DELTA's wholesale platform, illustrating the breadth of the partner ecosystem.

Regional players

• Deutsche Glasfaser: Deutsche Glasfaser is one of Germany's largest open-access FTTH operators, also PE-backed (EQT Infrastructure co-invested previously). Operates the same rural/underserved open-access fiber wholesale model as DELTA Netwerk but in Germany rather than the Netherlands.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks7 records

Key highlights7 records

Customer concentration

• Xx.com/deltafiber
• Facebookfacebook.com/deltanl

Compliance2 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles9 records

Subsidiaries6 records

Funding overview

Funding rounds2 records

Investors1 record

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 Delta Fiber