| Platform | Title | Accessibility | Start Date | Format | Participants | Location | Organizer | Contact | |
|---|---|---|---|---|---|---|---|---|---|
 | Code 4 BEST | Likely open | 10/04/2026 | in-person | 57 | Košice, Slovakia | BEST Hackathon | Upgrade | |
 | Battle of AI Test Tools | Worth reaching out | 03/04/2026 | in-person | 269 | San Francisco, United States | TatianaSF com | Upgrade | |
 | Ignite | Likely open | 03/04/2026 | in-person | 2 | Houston, Texas | Cougarettes | Upgrade | |
| Hack Like W@CC 2026 | Likely open | 03/04/2026 | in-person | 9 | Atlanta, Georgia | Women at College of Computing @ GT | Upgrade | |
| Vibe-coding HACathon | Building AI for Finance | Likely open | 03/04/2026 | in-person | TBD | San Francisco, United States | AI Valley | Upgrade | |
| Building Agents: NYC Hackathon [limited capacity] | Likely open | 03/04/2026 | in-person | 45 | New York | Robert Kwiatkowski | Upgrade | |
| XHacks 2026 | Likely open | 03/04/2026 | in-person | 109 | Pittsburgh, United States | UXA | Upgrade | |
 | Production Engineering Hackathon | Likely open | 03/04/2026 | online | 7 | Online | Major League Hacking | Upgrade | |
| PantherHacks 2026 | Likely open | 04/04/2026 | in-person | 3 | Orange, California | Chapman Computer Science Club | Upgrade | |
| Mem0rable Game Night: Community Builders + GTM | Worth reaching out | 04/04/2026 | in-person | TBD | San Francisco, United States | Hassan Ferozpurwala | Upgrade | |
| 유레카! Cursor Hackathon Seoul | Likely open | 04/04/2026 | in-person | TBD | Seoul, South Korea | SeoAnnie | Upgrade | |
| Builders Day by HackUnion | Likely open | 04/04/2026 | in-person | 9 | Hyderabad, Telangana | HackUnion | Upgrade | |
| MLH HACKDAY GREATER NOIDA | Likely open | 04/04/2026 | in-person | 1 | Greater Noida, Uttar Pradesh | Google Gemini | Upgrade | |
| Builder's Rave | Worth reaching out | 04/04/2026 | in-person | TBD | San Francisco, United States | Sentient Foundation | Upgrade | |
| Build Your Startup in 72 Hours | IDEANIX Launchpad | Likely open | 04/04/2026 | online | 7 | Online | Ideanix | Upgrade | |
| AI Ad Making Hackathon | Likely open | 04/04/2026 | in-person | TBD | Bengaluru | Conscious Engines | Upgrade | |
| ClubHacks | Likely open | 04/04/2026 | in-person | 11 | Windsor, Ontario | UWindsor Computer Science Society | Upgrade | |
| HackFest 2026 | Worth reaching out | 04/04/2026 | in-person | 257 | Gurugram, India | Tech4hack | Upgrade | |
| OpenAI Codex Community Hackathon - Mumbai | Likely open | 04/04/2026 | in-person | 170 | Mumbai | Ty Bertao | Upgrade | |
| Open Source Hack Day: Surogate / Invergent AI | Worth reaching out | 04/04/2026 | in-person | 17 | București, Romania | Răzvan Deaconescu | Upgrade | |
| Open Source Hack Day: Hacktor Watch / Zephyr OS | Worth reaching out | 04/04/2026 | in-person | 25 | București, Romania | Răzvan Deaconescu | Upgrade | |
| India OnChain Tour #19 - Delhi Edition | Likely open | 04/04/2026 | in-person | 46 | Noida, India | Nexido | Upgrade | |
| How to anticipate with systems thinking? | Likely open | 04/04/2026 | in-person | 7 | Espoo, Finland | Manan Aggarwal | Upgrade | |
| Build with TRAE @Hyderabad | Worth reaching out | 04/04/2026 | in-person | 156 | Hyderabad, India | HackPrix Community | Upgrade | |
| Solana Hackathon Kick-off, Ohrid | Likely open | 04/04/2026 | in-person | 27 | Ohrid, North Macedonia | Aleksandar Karadimche | Upgrade |
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