FOSDEM
- Organizer
- FOSDEM VZW (volunteer-run, non-profit)
- Category
- Database
- Website
- fosdem.org
- Typical place
- Brussels, Belgium
- Topics
- Database systemsData engineering
Free and Open source Software Developers' European Meeting: free, no-registration weekend event at ULB Solbosch, Brussels, early February (late Jan/early Feb). 2021 and 2022 were online-only. FOSDEM has ~750-1,100 schedule entries a year across dozens of devrooms; COVERAGE IS LIMITED TO DATA-RELATED DEVROOMS (Databases, PostgreSQL, MySQL/MariaDB, HPC/Big Data/Data Science, Data Analytics, Graph, Fast and Streaming Data, AI/ML rooms) plus a few data-related main-track/lightning talks; each edition's notes list the exact rooms included. The paid FOSDEM PGDay held the Friday before is tracked separately as fosdem-pgday. Sponsor tiers: Cornerstone mapped to title, Main to other. Social accounts are FOSDEM's own, as linked from the fosdem.org/2027 home page (no X/Twitter link shown there).
At a glance
- Next event
- Jan 30–31, 2027Brussels, Belgium
- Call for papers
- Open until Nov 16, 20267 days left
- Audience
- 8,000 attendees2026
- Tickets
- Free1 price, 2026
- Sponsorship
- Packages not published
- Sponsors
- 17 in 2026▲ +31% vs 2025 (13)
- Program freshness
- 97#40 of 127 · 2% reruns
- Similar conferences
- preFOSDEM MySQL Belgian Days, Percona Live, PostgreSQL Conference Europe
Speakers it attracts
The 220 people who spoke at FOSDEM in 2024–2026, by their record at the other conferences we track.
Most established speakers
- Bruce Momjian · EDBKeynoted 8 other conferences, spoke at 22: Percona Live, Swiss PGDay, PGConf India…
- Peter Zaitsev · PerconaKeynoted 7 other conferences, spoke at 15: Data Con LA, PostgreSQL Conference Europe (PGConf.EU), Percona Live…
- Maxime BeaucheminKeynoted 4 other conferences, spoke at 8: DataEngBytes, OSA CON (Open Source Analytics Conference), Airflow Summit…
- Russell Spitzer · SnowflakeKeynoted 3 other conferences, spoke at 11: Coalesce, Community Over Code (formerly ApacheCon), Iceberg Summit…
- Holden KarauKeynoted 2 other conferences, spoke at 12: PyData, Data Day Texas, Data + AI Summit…
- Karen (Karrie) JexKeynoted 1 other conference, spoke at 13: PyCon (national Python conferences), EuroPython, PostgreSQL Conference Europe (PGConf.EU)…
- Ryan Booz · RedgateKeynoted 1 other conference, spoke at 13: PASS Data Community Summit (formerly PASS Summit), PostgreSQL Conference Europe (PGConf.EU), Postgres Conference (PostgresConf)…
- Claire Giordano · MicrosoftKeynoted 2 other conferences, spoke at 9: PostgreSQL Conference Europe (PGConf.EU), PGConf NYC (Postgres Summit US from 2026), PGConf.dev (formerly PGCon)…
- Danica Fine · SnowflakeKeynoted 2 other conferences, spoke at 8: Snowflake Summit, Current (formerly Kafka Summit), PyCon (national Python conferences)…
- Gülçin Yıldırım Jelinek · XataSpoke at 14 other conferences: PostgreSQL Conference Europe (PGConf.EU), Berlin Buzzwords, Percona Live…
- Tomas Vondra · MicrosoftKeynoted 1 other conference, spoke at 11: Swiss PGDay, PostgreSQL Conference Europe (PGConf.EU), PGConf.DE (PostgreSQL Conference Germany)…
- Matt Topol · ColumnarKeynoted 1 other conference, spoke at 10: Coalesce, PyData, Data Council…
Activity by year
Sponsor companies per year
Distinct companies sponsoring any event that year.
- Partial or unverified list
8 of 8 years have a partial, unverified or missing sponsor list, so their bars undercount.
Speakers per year
Distinct people on stage at any event that year; same year axis as sponsors.
Events
| Dates | Event | Place | Format / status | Attendance | Sponsors | Speakers |
|---|---|---|---|---|---|---|
| Jan 30–31, 2027 | FOSDEM 2027 | Brussels, Belgium | Announced | — | 5 | — |
| Jan 31, 2026 – Feb 1, 2026 | FOSDEM 2026 | Brussels, Belgium | 8,000 | 17 | 86 | |
| Feb 1–2, 2025 | FOSDEM 2025 | Brussels, Belgium | 5,000 | 13 | 127 | |
| Feb 3–4, 2024 | FOSDEM 2024 | Brussels, Belgium | 5,000 | 16 | 53 | |
| Feb 4–5, 2023 | FOSDEM 2023 | Brussels, Belgium | 5,000 | 14 | 69 | |
| Feb 5–6, 2022 | FOSDEM 2022 | — | Online | — | 10 | 68 |
| Feb 6–7, 2021 | FOSDEM 2021 | — | Online | — | 11 | 87 |
| Feb 1–2, 2020 | FOSDEM 2020 | Brussels, Belgium | 5,000 | 15 | 64 | |
| Feb 2–3, 2019 | FOSDEM 2019 | Brussels, Belgium | 5,000 | 14 | 58 |
Attendance over time
Reported attendance for 6 of 9 events; figures are as published by the organizer.
Most frequent speaker companies
Speaker appearances across all events, by the speaker's company.
Similar conferences
Conferences with the most similar speaker mix: their speakers come from the same companies. Bars are cosine similarity on a 0–1 scale; between conferences even the closest pairs share only part of their crowd.
Sponsors over the years
Top 25 of 37 sponsoring companies, ranked by years sponsored. Each cell shows the highest tier that year; hover for the events.
- Title / headline
- Other / unspecified