Delta Fiber
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.
- Company typePrivate
- Founded2018
- HeadquartersSchiedam, Netherlands
- Headcount501–1,000
- GTM typeB2B and B2C
- OfferingServices
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.
Delta Fiber firmographics
Firmographics- 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
Delta Fiber industry classification
Industry- 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
Where Delta Fiber is headquartered
LocationHeadquarters
- HQ city
- Schiedam
- HQ country
- Netherlands
- HQ region
- Europe
Offices2 records
Markets served
Delta Fiber business model
Business model- GTM type
- B2B and B2C
- Offering type
- Services
- Cost components
- Infrastructure, Personnel, Marketing or Sales, Operations, Technology or R&D
Revenue model
- 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.
- 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.
- 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
Delta Fiber product offering
Product offeringCore 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
Companies that use Delta Fiber
Customer profileNamed customers3 records
Segments3 records
Ideal customer profiles3 records
Delta Fiber technology and API
TechnologyTechnology focussed Yes
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Integration6 records
Feature3 records
Delta Fiber partnerships and signals
Strategic signalPartnerships
Five partnerships are on record, tiered core and major.
- RENDO Fiber (RENDO)coreJoint 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.
- OdidomajorWholesale partner delivering internet and TV services over DELTA Fiber's open fiber network, contributing to strong revenue growth alongside DELTA's own retail operations.
- VodafoneZiggomajorMajor telecom operator that entered into partnership to deliver services over DELTA Fiber's fiber-optic network as newest wholesale partner.
- T-MobilemajorNetwork sharing partnership where DELTA Fiber and T-Mobile have made their networks fully available to each other, expanding service coverage for both parties.
- RE-NETcorePartner 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
Delta Fiber competitors and assessment
Company assessmentDirect 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
Delta Fiber social profiles
Digital presenceDelta Fiber compliance and trust
Trust signalCompliance2 records
Delta Fiber financial estimates
Financial estimateRevenue estimate
Valuation estimate
Delta Fiber leadership team
Management profileNumber of profiles
Profiles9 records
Delta Fiber subsidiaries and ownership
Company hierarchySubsidiaries6 records
Delta Fiber funding detail
Funding detailFunding overview
Funding rounds2 records
Investors1 record
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Delta Fiber M&A and investment
M&A and investmentM&A1 record
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about Delta Fiber
What does Delta Fiber do?
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.
Is Delta Fiber a public or private company?
Delta Fiber is a private company. It is classified as private equity controlled and is currently operating.
When was Delta Fiber founded?
Delta Fiber was founded in 2018. It employs 501 to 1,000 people.
Where is Delta Fiber based?
Delta Fiber is headquartered in Schiedam, Netherlands, in the Europe region.
How does Delta Fiber make money?
Three revenue lines are on record. Retail Telecommunications Services are the primary driver. The others are wholesale Network Access and network Construction Services.
Who are Delta Fiber's main competitors?
Direct peers on record are KPN, VodafoneZiggo, Odido, T-Mobile Netherlands and Eurofiber. Emerging players are Glaspoort, Freedom Internet, Online.nl and Helden van Nu (NLconnect member ISPs). Deutsche Glasfaser is listed as a regional player.
Does Delta Fiber have an API?
No public API is recorded for Delta Fiber.
What industry is Delta Fiber in?
Delta Fiber's product category is Fiber Telecommunications Services. Its primary akta.pro industry code is HDAIADAE, Fiber ISPs (FTTH/FTTP Retail Providers), with a secondary code of HDAIACAF, Open-Access Fiber Network Operators (Wholesale-Only). Its NAICS code is 517111 and its SIC code is 4841.