International hackathons you can join online (2026)
These hackathons run fully online, so you can build and submit from anywhere with an internet connection. Teams meet over video calls and share code on GitHub.
Open and upcoming
AgentX Hackathon 2026
Build AI agents that get real work done. 24 hours, online. Free to register.
Hackathon by Hack4Hack · Online · ₹3.75L in prizes · Free · Registration closes 2 Nov 2026
ML Gradient Wars 2026
A 48-hour ML battle. ₹5 lakh in prizes, and every member of the top 3 teams is referred to The Data Foundation for a 3-month internship.
Datathon by Hack4Hack · Online · ₹5L in prizes · ₹1999 entry · Registration closes 10 Nov 2026
Hack4Hack Crew Hiring Challenge 2026
We are hiring 2 Full-stack Engineers. Skip the CV: solve a real Hack4Hack problem. Paid internship or full-time, remote, open worldwide. Free to enter.
Hiring Challenge by Hack4Hack · Online · Prizes: 2 Full-stack Engineer roles: the top 5 for each problem statement get an interview · Free · Registration closes 15 Nov 2026
AgentRush USA 2026
Build AI agents that actually do the work. 7 problem statements, $5,000 in prizes for the top 15. Round 1 is free.
Hackathon by Hack4Hack · Online · USA only · $5,000 in prizes · Free · Registration closes Nov 22, 2026
Model Mayhem USA 2026
A 24-hour sprint, then a 48-hour final. $3,000 in prizes for the top 15. Round 1 is free; the top 100 teams make the final.
Datathon by Hack4Hack · Online · USA only · $3,000 in prizes · Free · Registration closes Nov 28, 2026
Past international hackathons
ML Challenge Hack4Hack 2026
A two-round machine-learning challenge. A 24-hour Round 1 starts when the problem statement and dataset go live on 22 Oct; the top 100 get a new problem and dataset on 27 Oct.
Datathon by Hack4Hack · Online · ₹1L in prizes · Free · Ended 28 Oct 2026
About international hackathons
Eligibility is set by each organizer: some hackathons are open to everyone, others only to students or to people in certain countries. Each hackathon page lists who can take part, its entry fee and its deadline.
Frequently asked questions
Can I join a hackathon from outside India?
Many online hackathons accept anyone, wherever they live, but each organizer sets its own eligibility. Read the "Who can participate" section on the hackathon page before you register.
How are prizes paid to international winners?
It depends on the organizer. The hackathon page and its rules explain how and in which currency prizes are paid.
Will I get a certificate?
Every team that submits a project gets a participation certificate when the hackathon ends, and winners get a certificate of achievement. Some organizers add their own certificates too.
Are there startup competitions open internationally?
Yes. The Hack4Hack Global Startup Challenge 2026 is open to startups from any country, free to apply, with online pitching for the top 25.