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Where APIs break, and real security gets built.
Paris is a global hub for digital innovation, powering industries from mobility and energy to public services and AI. HAC Paris unites hackers, defenders, and security teams for live exploits, hands-on labs, and real-world tactics to secure the APIs behind Europe’s most ambitious platforms.
500+
participants
300+
companies
20+
speakers
20+
sessions
Join the hackers and security pros who brought their skills, and left sharper.
Hack live
Watch APIs break in real time, and learn how to fix them before attackers do.
Hands-on labs
Stop listening, start doing. Test real tools and defenses on real systems.
Unfiltered war stories
Hear how breaches happened and what actually stopped them—straight from the people who lived it.
Practical, not theoretical
Get tactics and frameworks you can use immediately.
Community that builds and breaks
Join hackers, defenders, and engineers who care about one thing: making APIs stronger
PortSwigger is a web security company on a mission to enable the world to secure the web.
dev.events is the #1 tech conference listing. Coded at night under caffeine, ad-free, curated by tech community.
The finest in geek entertainment
Aikido Security (Founded 2022, Ghent) is the developer-first security platform that unifies code, cloud, protection, and attack testing in one suite of best-in-class products. Built by developers for developers, Aikido helps teams of any size ship secure software faster, automate protection, and simulate real-world attacks with AI-driven precision. The platform’s proprietary AI cuts noise by 95%, delivers one-click fixes, and saves developers 10+ hours per week. Aikido Intel proactively uncovers vulnerabilities in open source packages before disclosure, helping secure more than 50,000 organizations worldwide, including Niantic, Visma, Montblanc, and GoCardless.
PortSwigger is a web security company on a mission to enable the world to secure the web.
dev.events is the #1 tech conference listing. Coded at night under caffeine, ad-free, curated by tech community.
The finest in geek entertainment
Aikido Security (Founded 2022, Ghent) is the developer-first security platform that unifies code, cloud, protection, and attack testing in one suite of best-in-class products. Built by developers for developers, Aikido helps teams of any size ship secure software faster, automate protection, and simulate real-world attacks with AI-driven precision. The platform’s proprietary AI cuts noise by 95%, delivers one-click fixes, and saves developers 10+ hours per week. Aikido Intel proactively uncovers vulnerabilities in open source packages before disclosure, helping secure more than 50,000 organizations worldwide, including Niantic, Visma, Montblanc, and GoCardless.
Upstream delivers a cloud-based, AI-powered cybersecurity platform purpose-built for connected vehicles, smart mobility, and the IoT ecosystem.
Attend
Secure your spot and be part of the proving ground for API security.
Speak
Got a war story, zero-day research, or a defense strategy that worked when everything was on fire? This is your stage.
Sponsor
Support the event that’s bringing real API security into the spotlight, and get in front of the people who live it every day.
