Open Conf · Athens, Greece · 7 Editions
Open Conf 2025
By the Numbers
November 21–22, 2025 · Dais Events Center, Marousi · Athens
1,017
Total Registrations
19
Countries Beyond Greece
4,839
All-time unique Registrations
2025 Registrations
Registration Breakdown — 1,017 total
Participation Beyond Greece — 19 countries, 46 participants
CROATIA
9
IRELAND
4
MALTA
4
ROMANIA
3
CYPRUS
3
UNITED KINGDOM
3
FRANCE
3
SERBIA
3
UKRAINE
2
SWITZERLAND
2
UNITED STATES
2
GIBRALTAR
1
ARGENTINA
1
POLAND
1
BELGIUM
1
CAMEROON
1
ESTONIA
1
UNITED ARAB EMIRATES
1
NETHERLANDS
1
Gender Distribution — estimated from first names
Women
29.1%
Men
70.9%
277 Women
675 Men
65 undetected
Based on 952 names with confident detection out of 1,017 registrations
Experience in Current Role — 878 responses
Year-over-Year — All Editions
Main Event Registrations by Category per Edition
2020: online edition (COVID-19) · 2021: held online, no records available
Workshops & Mentoring
Participation in Workshops (incl. CTF Challenges) & Mentoring Sessions per Edition
Workshops introduced in 2022 · Mentoring introduced in 2024 · CTF included in Workshops count
Companies by Sector
Companies by Sector — 2025 registrations
Who Attended — Top Companies 2025
Top 50 Companies — 2025 · size reflects number of attendees
NokiaZone01PwCAccentureAgile ActorsYodeckOpapNetcompanyeShareIntralotXMGwiEpignosisOptasiaEtraveli GroupNatechLight & WonderMondelezIntesa SanpaoloStarttech VenturesHeronDouleutarasKplerMantisOrfiumKaizen GamingTuv AustriaQualcoNtt DataNet-MerchΔιατραπεζικα Συστηματα Α.ΕCode4ThoughtAlphabit CybersecurityAlpha BankOpenbetBitloopsWorkableNovaHumaniTashitaInventyou HellasAwsSimpleappsSteelmetUni SystemsBetsson GroupJpmorganOteInstacarAlef Distribution Gr
Universities — 2025
University & Academic Participation — 129 attendees
Audience Tech Interests — 2025
What our community works with — 878 survey responses
29.1%
Women Participants (est.)
19
Countries Beyond Greece
878
Completed Interest Survey
7
Editions Since 2019