Here are more ongoing or upcoming hackathons in April and May 2025 with prize money over $50,000 (excluding the sites you already checked):
Agentforce Virtual Hackathon: Runs through April 30, 2025, with a $50,000 grand prize and additional $20,000 category prizes.
AssemblyAI AI Hackathon: Fully virtual, offering over $50,000 in cash prizes for AI-driven projects.
Google Cloud Hackathons (Solve for India, Build for India): Multiple events throughout the year with large prize pools and seed funding opportunities.
Adobe GenSolve Hackathon: Scheduled for July-August, but Adobe also runs CodVita and Women in Tech hackathons in March/April with significant cash awards.
Flipkart GRiD: Starts in June but has a prize pool and internship offers worth over $50,000.
Bitcamp 2025: Scheduled for April, known for substantial prize pools and industry backing.
WEHack: April 2025 in Texas, a major inclusive hackathon with notable prizes and industry sponsors.
HackKU25: April 18-20, 2025, at University of Kansas, with a strong prize offering and open to students globally.
Hacklytics: February 2025, but often has spring/summer editions with big cash prizes for data science solutions.
UGAHacks X: February 2025, but check for ongoing tracks or late spring extensions.
Google Girl Hackathon: March, with major prizes and presentation opportunities at Google offices.
Adobe Women in Technology Scholarship Hackathon: March/April, includes large scholarships and cash awards.
Myntra HackerRamp: Typically runs in spring with significant prize money and hiring opportunities.
JP Morgan Chase Code for Good: Large-scale hackathon with cash prizes and job offers, usually in spring/summer.
Uber HackTag: Known for high-value prizes and unique challenges, typically in the first half of the year.
Some events' exact 2025 prize pools are still being finalized, but these are among the largest and most reputable hackathons globally this season.
Let me know if you want details on any specific one!