DORS/CLUC

What DORS/CLUC does

DORS/CLUC (Dani otvorenih računarskih sustava / Croatian Linux Users' Conference) is a regional technology conference held annually in Zagreb, Croatia, focused on free and open-source software, GNU/Linux, modern development practices, and DevOps. Founded in 1993 and now in its 31st edition (April 24-25, 2026), it is the longest-running conference of its kind in the Balkan/Southeast European region. The event is organized jointly by two Croatian non-profit associations — HrOpen (est. 1992) and HULK (est. 1996) — and is held at Algebra Bernays University in Zagreb.

The core product is a two-day multi-track conference featuring technical talks, practical workshops, inspirational keynotes, and policy discussions across cloud-native development, DevOps, infrastructure, security, AI/ML, and open-source ecosystem topics. Sub-conferences extend the surface area into OpenStreetMap, Open Data, and Digital Education; a parallel Open 4 Business track targets open-source-friendly SMEs. The underlying technology stack is a conventional conference platform with live-streaming infrastructure provided by CARNet (Croatian Academic and Research Network) via the Meduza platform, enabling global remote attendance, with all recorded talks subsequently published under a CC BY-SA 4.0 license on a dedicated YouTube channel (@DORSCLUCconf_official).

The business model is freemium and non-commercial in character. Conference attendance is free, removing financial barriers to community participation; optional paid supporter tiers — a 55 EUR "Clothed Freedom Penguin" merchandise ticket and a 200 EUR "DORS/CLUC Supporter Ticket" — allow attendees to contribute financially. Primary revenue is generated through corporate sponsorships structured across Gold, Status, and Friend tiers, with a sponsor roster for 2026 including Google, Nimium, Oradian, and Open IT alongside community partners such as the Free Software Foundation Europe, Red Hat, CARNet, and the University of Zagreb's SRCE and FER. The audience spans developers, software architects, and DevOps engineers as the primary segment, with secondary segments including open-source SMEs and FLOSS advocates.

Name

DORS/CLUC

Legal name

DORS/CLUC (Dani otvorenih računarskih sustava / Croatian Linux Users' Conference)

Website

https://dorscluc.org

Company type

Private

Founded year

1992

Operating status

Operating

Headcount range

251–500 employees

Short description

DORS/CLUC is a 33-year-old annual regional technology conference in Zagreb, Croatia, organized by the non-profits HrOpen and HULK, serving developers, DevOps engineers, and open-source SMEs with free admission, live streaming, and freemium supporter tiers.

Ownership category

akta.pro rank

Product category

Technology Conference

NAICS

Convention and Trade Show Organizers (561920), Media Streaming Distribution Services, Social Networks, and Other Media Networks and Content Providers (51621)

akta.pro primary industry

Association & Society Conference Management (Nonprofit, Professional Bodies) (THAHACAA)

akta.pro secondary industries

Academic & Education Conference Organizers (THAHACAE), Virtual/Hybrid Conference Production & Platform Management (THAHACAM), Academic & Scientific Conferences (MPAGAGAD)

Keywords

• Technology conference
• Open source community
• Developer events
• DevOps conference
• FLOSS advocacy

Headquarters

HQ city

Zagreb

HQ country

Croatia

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B and B2C

Offering type

Services

Cost components

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

Revenue model

1. Conference Attendance: Free basic entry to DORS/CLUC 2026 serves as the primary community engagement model. Optional paid tiers provide supplementary revenue: Clothed Freedom Penguin (55 EUR) and DORS/CLUC Supporter Ticket (200 EUR) allow attendees to support the conference financially.

Pricing tiers

Go-to-market motion1 record

Distribution channels3 records

Marketing channels7 records

Core offering

DORS/CLUC organizes and hosts an annual free-to-attend regional technology conference in Zagreb, Croatia, focused on free and open-source software, open systems, GNU/Linux, modern development, and DevOps. The conference delivers technical sessions, workshops, keynotes, and policy talks across multiple tracks, complemented by free global live streaming and publicly published recorded talks. Supplementary programming includes the Open 4 Business meetup for regional open-source SMEs, subconferences on OpenStreetMap, Open Data, and Digital Education, and facilitated connections to the NGI Zero funding program for open-source projects.

Product overview

DORS/CLUC (Dani otvorenih računarskih sustava / Croatian Linux Users' Conference) is a regional technology conference serving the tech community for 33 years. The conference offers a single unified event focused on Modern Development and DevOps, featuring multiple tracks covering development, architecture, DevOps, infrastructure, security, and community/policy topics. The event provides live streaming, recorded sessions published under CC BY-SA 4.0 license, and includes sub-conferences on OpenStreetMap, Open Data, and Digital Education. DORS/CLUC also encompasses the Open 4 Business meetup for regional companies and facilitates connections to the NGI Zero funding program for open source projects.

Differentiator

Problem solved

Functional benefit

Brands

• Open 4 Business: An open source businesses' event, part of the DORS/CLUC conference with talks, lightning talks, networking with finger food and beer.

Products and services

• DORS/CLUC Conference The 31st annual regional conference for Modern Development and DevOps, free to attend and held April 24–25, 2026 at Algebra Bernays University in Zagreb. Features technical sessions, practical workshops, inspirational keynotes, and policy topics covering cloud-native development, AI/ML, DevOps, infrastructure, security, and open-source technology. Targeted at developers, software architects, and DevOps engineers in the Balkan region.
• Open 4 Business An open-source businesses meetup within the DORS/CLUC community, featuring talks, lightning talks, and networking with finger food and beer. Free to attend without a DORS/CLUC ticket, designed to provide a regional platform for companies to share free software and open-source expertise and to promote collaboration among open-source-friendly SMEs.
• DORS/CLUC Live Stream Free live streaming service for the DORS/CLUC Conference, broadcasting multiple tracks via CARNet's Meduza platform so remote attendees worldwide can follow sessions in real time.
• DORS/CLUC Subconferences (OpenStreetMap, Open Data, Digital Education) Specialized thematic subconferences within DORS/CLUC focusing on OpenStreetMap mapping and cartography, open-data usage and liberation, and digital education topics.

Segments3 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Partnerships

17 partnerships are on record, tiered core and minor.

• HrOpencoreStrategic or Co-development PartnerThe Croatian Association for Open Systems and Internet (HrOpen), established in 1992, is one of the two primary organizers of DORS/CLUC. HrOpen is a self-financed, non-profit association that promotes FLOSS technology through workshops, seminars, and conferences.
• HULKcoreStrategic or Co-development PartnerThe Croatian Linux Users' Association (HULK) is a non-profit citizen association that has been promoting GNU/Linux and FLOSS technology in Croatia since 1996. HULK is responsible for organizing DORS/CLUC and maintaining the www.linux.hr website.
• Algebra Bernays UniversitycoreGTM or Marketing PartnerAlgebra Bernays University is the venue partner hosting DORS/CLUC 2026. As a key educational institution in Croatia, it provides the conference location and logistical support.
• NimiumcoreGTM or Marketing PartnerNimium is a Gold sponsor for DORS/CLUC 2026. They provide open source software solutions and GNU/Linux-based solutions, and have been a longtime supporter of the conference.
• Open ITcoreGTM or Marketing PartnerOpen IT is a Gold sponsor providing infrastructure modernization services. They are part of the Open 4 Business community and supporter of open source initiatives.
• GoogleminorGTM or Marketing PartnerGoogle is a Status sponsor for DORS/CLUC 2026. Their Zagreb team focuses on educational features and Gemini model advancement for Google Search.
• OradianminorGTM or Marketing PartnerOradian is a Status sponsor and global fintech company building cloud-based core banking technology for financial institutions across Africa and Southeast Asia.
• CARNetcoreTechnology or IntegrationCARNet (Croatian Academic and Research Network) provides the live streaming infrastructure for DORS/CLUC 2026, enabling global remote access to conference sessions.
• University of Zagreb Computing Centre (SRCE)minorGTM or Marketing PartnerSRCE is the main computing centre and architect of e-infrastructure for the University of Zagreb and research system. They provide infrastructure support for initiatives like OpenCode.HR.
• Faculty of Electrical Engineering and Computing (FER)minorGTM or Marketing PartnerFER is Croatia's leading academic and research institution in electrical engineering, computing, and ICT. Provides logistical and organizational support to DORS/CLUC.
• Flying PenguinminorGTM or Marketing PartnerFlying Penguin is a DevOps and SRE consultancy that offers premium development services worldwide. Friend sponsor and supporter of Open 4 Business.
• AxiansminorGTM or Marketing PartnerFriend sponsor, part of infrastructure modernization projects community.
• SpyrosoftminorGTM or Marketing PartnerFriend sponsor, part of the software development community.
• APIS ITminorGTM or Marketing PartnerFriend sponsor, part of the IT services community.
• Red HatminorGTM or Marketing PartnerFriend of Open 4 Business, supporting the open source business community goals.
• Free Software Foundation EuropeminorGTM or Marketing PartnerFriend of Open 4 Business, promoting free software values.
• NGI Zero / NLnet FoundationminorGTM or Marketing PartnerNGI Zero program connects with DORS/CLUC to promote funding opportunities for open source projects in digital commons and networked technology areas.

Scale indicators3 records

Recent moves6 records

Expansion highlights5 records

Emerging players

• FOSSASIA Summit: FOSSASIA is an Asia-based open-source community conference with similar grassroots, FLOSS-focused positioning — comparable as an emerging peer that overlaps with DORS/CLUC's open-source community audience and non-commercial ethos, though operating in a different geography.

Direct peers

• LibrePlanet: LibrePlanet is the Free Software Foundation's annual conference focused on free software philosophy, governance, and community — directly comparable to DORS/CLUC in its FLOSS community focus and non-commercial, community-led ethos.
• EuroPython: EuroPython is Europe's main Python community conference, organized by volunteers with similar community-led principles — directly comparable in non-profit European tech conference model and developer audience overlap.
• Devoxx: Devoxx is a major European developer conference series covering Java, cloud, AI, and DevOps — directly comparable in audience (software architects, developers) and conference format, though it operates at significantly larger commercial scale.
• State of the Map (OpenStreetMap): State of the Map is the annual global OpenStreetMap conference — directly comparable as a niche FLOSS sub-conference that DORS/CLUC partially overlaps with via its OpenStreetMap sub-track, sharing audience and FLOSS community ethos.
• FOSDEM: FOSDEM is the largest free and open-source developer conference in Europe, held annually in Brussels with free admission, multiple dev rooms, and community-driven organization — directly comparable to DORS/CLUC in mission, model, and audience.
• Config Management Camp: Config Management Camp is a community-run open-source DevOps and infrastructure conference in Belgium — directly comparable in its free-admission, community-organized format focused on DevOps tooling.

Broad incumbents

• Open Source Summit Europe: Open Source Summit Europe is the Linux Foundation's flagship European FLOSS conference, much larger in scale but covering overlapping audiences (developers, DevOps, open-source maintainers) and competing for similar sponsorships in the European market.
• Red Hat Summit: Red Hat Summit is the commercial flagship open-source enterprise conference, sponsored by a company (Red Hat) that is itself a Friend-tier sponsor of DORS/CLUC — comparable in enterprise FLOSS audience overlap and competing for sponsor share of voice in the European market.
• KubeCon + CloudNativeCon Europe: KubeCon is the flagship CNCF conference for Kubernetes and cloud-native DevOps, attracting many of the same developers, DevOps engineers, and cloud sponsors (Google, Red Hat) that DORS/CLUC targets in the Balkan region.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks5 records

Key highlights6 records

Customer concentration

• YouTubeyoutube.com/@DORSCLUCconf_official
• Facebookfacebook.com/dorscluc
• LinkedInlinkedin.com/company/dorscluc

Revenue estimate

Valuation estimate

Number of profiles

Profiles6 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 DORS/CLUC