What Tweede golf does

Tweede Golf B.V. is a privately-held Dutch Rust engineering consultancy founded in 2009 and headquartered in Nijmegen with an additional office in Delft. The firm offers three core service lines — Rust engineering (systems, web, and embedded development), instructor-led Rust training, and Rust adoption consulting — sold through direct, sales-led engagements with custom quote-based pricing and multi-year contracts. Its client base spans nine-plus named organizations including Microsoft, NXP Semiconductors, Infineon, Technolution, Rocsys, Gemeente Amsterdam, ISRG/Let's Encrypt, the Dutch Electoral Council (Kiesraad), Lightyear, and GAMA, covering embedded semiconductors, internet infrastructure, automotive, robotics, gaming, and Dutch national and municipal government.

Technically, Tweede golf is built around Rust's memory-safety properties and operates across systems, web, and embedded domains. Its proprietary contributions include a Rust Interop Guide for integrating Rust into existing C, C++, Python, Java, Kotlin, and JavaScript codebases, plus an extensive open-source portfolio (ntpd-rs, Statime, sudo-rs, zlib-rs, openleadr-rs, sequential-storage, nrf-modem, teach-rs, Abacus, MailCrab). Several of these projects carry significant production weight: ntpd-rs secures time synchronization for Let's Encrypt (covering 700M+ websites), sudo-rs is shipped as a drop-in replacement in Ubuntu 25.10, and Abacus underpins the Dutch Electoral Council's seat-allocation process. The company maintains Silver Membership in the Rust Foundation and co-founded the Trifecta Tech Foundation in 2024 as a non-profit governance home for its public-benefit open-source work.

Commercially, Tweede golf generated approximately $1.5M in annual revenue as self-disclosed in late 2023, with no external venture capital and ownership concentrated among three co-owners (Erik — Director of Open Source, Hugo — Business Director, Marlon — CTO). The business runs lean at ~18 employees, monetizes primarily through custom consultancy engagements and training contracts, and uses open-source contributions as a top-of-funnel demand-generation channel rather than a direct revenue stream. Funding for open-source infrastructure projects is sourced separately via grants from bodies such as the Sovereign Tech Fund (€440k for Pendulum) and the Internet Security Research Group/Prossimo initiative.

Name

Tweede golf

Legal name

Tweede Golf B.V.

Website

https://tweedegolf.nl

Company type

Private

Founded year

2009

Operating status

Operating

Headcount range

11–50 employees

Short description

Tweede golf is a Dutch Rust engineering consultancy providing systems, web, and embedded software development, training, and adoption consulting to enterprise, government, and infrastructure clients including Microsoft, NXP, Infineon, ISRG/Let's Encrypt, and the Dutch Electoral Council.

Ownership category

akta.pro rank

Product category

Software Engineering Consulting

NAICS

Software Publishers (51321)

SIC

Services-Computer Programming Services (7371)

akta.pro primary industry

Software Development (Programming, Frameworks, Dev Tools) (EDABAFAA)

Keywords

• Rust engineering services
• Embedded software development
• Rust training
• Open-source infrastructure
• Memory-safe software

Headquarters

HQ city

Nijmegen

HQ country

Netherlands

HQ region

Europe

Offices2 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. Rust Engineering Consultancy: The company provides Rust engineering services including systems engineering, web engineering, and embedded engineering. Revenue is generated through client engagements and consultancy projects.
2. Rust Training Services: The company offers embedded Rust training and general Rust training services, providing hands-on instruction tailored to client needs.

Pricing tiers

Go-to-market motion1 record

Distribution channels3 records

Marketing channels8 records

Core offering

Tweede golf is a Rust engineering consultancy that delivers systems, web, and embedded software development services, instructor-led Rust training, and Rust adoption consulting to clients ranging from start-ups to enterprises and government bodies. The firm also maintains an extensive portfolio of open-source infrastructure projects (ntpd-rs, Statime, sudo-rs, zlib-rs, openleadr-rs, sequential-storage, nrf-modem, teach-rs, Abacus) that are used in production by organizations including ISRG/Let's Encrypt, Canonical/Ubuntu, and the Dutch Electoral Council. Revenue is generated primarily through professional engineering, training, and consulting engagements.

Product overview

Tweede golf is a Rust engineering consultancy offering professional services and maintaining open-source projects. The company provides three core service offerings: Rust Engineering Services (systems, web, and embedded software development), Rust Training Services (instructor-led training for teams), and Rust Consulting Services (expert guidance on Rust adoption). The company also maintains an extensive portfolio of open-source Rust libraries and initiatives, including Project Pendulum (comprising ntpd-rs for NTP and Statime for PTP time synchronization protocols), sudo-rs (memory-safe sudo/su implementation), zlib-rs (memory-safe compression), openleadr-rs (OpenADR protocol implementation), sequential-storage (flash memory storage crate), and nrf-modem (async Rust support for Nordic LTE modems). The Rust Interop Guide provides educational resources for integrating Rust with other programming languages.

Differentiator

Problem solved

Functional benefit

Brands

• Project Pendulum: A project building modern, open-source implementations of the Network Time Protocol (NTP) and Precision Time Protocol (PTP) in Rust, focused on security and memory safety.
• Trifecta Tech Foundation

Products and services

• Rust Engineering Services Professional Rust software engineering services covering systems, web, and embedded software development, team augmentation, and end-to-end project delivery for organizations adopting or scaling Rust.
• Rust Training Services Instructor-led and hands-on Rust programming training for development teams, covering embedded systems, systems programming, and web engineering in Rust, tailored to client needs.
• Rust Consulting Services Expert Rust programming consultancy helping organizations adopt Rust, review existing codebases, and optimize Rust implementations, including guidance on interoperability with C, C++, Python, Java, and JavaScript codebases.

Quantifiable outcome

• ntpd-rs secures 700M+ websites through Let's Encrypt
• +2 more outcomes

Named customers11 records

Segments4 records

Ideal customer profiles3 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature8 records

Partnerships

Eight partnerships are on record, tiered core and minor.

• Trifecta Tech FoundationcoreStrategic or Co-development Partner · 1 January 2024In 2024, the owners of Tweede golf created Trifecta Tech Foundation as a non-profit and the long-term home for their open-source projects that serve the public benefit. Tweede golf is committed to supporting it through in-kind and financial donations. The foundation governs sudo-rs, zlib-rs, teach-rs, and other open-source projects including Pendulum initiatives.
• Rust FoundationcoreStrategic or Co-development PartnerTweede golf is a Silver Member of the Rust Foundation, demonstrating deep involvement in the Rust ecosystem and commitment to the language's development and community.
• Ferrous SystemscoreStrategic or Co-development PartnerFerrous Systems is a partner of Tweede golf, collaborating on Rust ecosystem projects including sudo-rs (jointly implemented by Ferrous Systems and Tweede golf for Prossimo).
• NLnet LabscoreStrategic or Co-development PartnerNLnet Labs is a partner of Tweede golf. They co-funded the first milestones of Statime (PTP implementation) and have been involved in Pendulum and open-source infrastructure projects.
• SIDNminorStrategic or Co-development PartnerSIDN (Dutch internet registry operator for .nl domain) is an Innovation Partner of Tweede golf, supporting innovation in internet infrastructure.
• iHubminorStrategic or Co-development PartneriHub (Radboud University) is a partner of Tweede golf, collaborating on innovation projects such as the ID Contact digital identification pilot.
• OpenLEADR Project (LF Energy)coreStrategic or Co-development Partneropenleadr-rs is part of the OpenLEADR Project, governed by the Linux Energy Foundation (LF Energy). Joint effort by Tweede golf and ElaadNL for OpenADR protocol implementation.
• Dutch Electoral Council (Kiesraad)coreStrategic or Co-development PartnerTweede golf engineers joined the Electoral Council developer team to build Abacus, an open-source application supporting the paper-based vote counting process for Dutch election results and seat distribution.

Scale indicators3 records

Recent moves7 records

Expansion highlights5 records

Broad incumbents

• SUSE: Enterprise Linux distribution and open-source infrastructure vendor. Comparable as a Linux ecosystem steward that could adopt memory-safe rewrites like sudo-rs across its enterprise distributions.
• Red Hat: Largest commercial open-source company (RHEL, Fedora, Ansible). Adjacent in mission and customer base as an enterprise-focused open-source infrastructure provider, though much broader in scope than Rust services.
• Thoughtworks: Global technology consultancy with deep open-source and platform engineering practice. Larger incumbent competing for the same enterprise modernization and custom engineering budgets, though without Rust specialization.
• Canonical: Commercial Ubuntu sponsor and broader open-source services company. Adopted sudo-rs into Ubuntu 25.10, making it both a downstream distribution partner and an adjacent open-source services incumbent.

Others

• JetBrains: Developer tooling vendor with first-party Rust support (RustRover IDE) and active in the Rust ecosystem. Adjacent ecosystem participant rather than direct competitor, but shapes the developer experience and adoption curve for Rust.
• Mozilla: Originating sponsor of the Rust programming language. Ecosystem-level relationship rather than direct competitor; Mozilla's stewardship decisions materially shape demand for Rust services.
• Internet Security Research Group (Prossimo): Parent of Let's Encrypt and operator of the Prossimo initiative that funds memory-safety rewrites of critical internet infrastructure. Direct funder of ntpd-rs development by Tweede golf and key ecosystem counterparty.

Direct peers

• NLnet Labs: Dutch open-source internet infrastructure organization (DNSSEC, NSD, Unbound). Strategic partner of Tweede golf, co-funded Statime milestones, and shares the open-source infrastructure stewardship ethos.
• Integer 32: US-based Rust services consultancy offering training, consulting, and development. Directly comparable business model focused exclusively on the Rust programming language.
• Ferrous Systems: Germany-based Rust engineering consultancy of comparable scale and footprint. Co-implemented sudo-rs with Tweede golf for Prossimo and competes directly for enterprise Rust engagements across EMEA.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks7 records

Key highlights6 records

Customer concentration

• GitHubgithub.com/tweedegolf
• LinkedInlinkedin.com/company/tweede-golf-software-engineering
• Xx.com/tweedegolfbv

Revenue estimate

Valuation estimate

Number of profiles

Profiles3 records

Funding overview

Funding rounds

Investors

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 Tweede golf