Hackathons in October 2026
These are the hackathons with registration or the build phase happening in October 2026. Deadlines are listed in Indian time; register early, as some hackathons close when they are full.
Hackathons with a registration deadline in October 2026 come first. For everything coming up later, see all upcoming hackathons.
Open and upcoming
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 for 3 days.
Datathon by Hack4Hack · Online · ₹1L in prizes · Free · Registration closes 20 Oct 2026
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 30 Oct 2026
Frequently asked questions
Which hackathons are open in October 2026?
This page lists every hackathon on Hack4Hack whose registration or submission window falls in October 2026, updated automatically as organizers publish new ones.
Do I have to pay to register on Hack4Hack?
No. A Hack4Hack account is free, and most hackathons are free to enter. When an organizer charges a fee, it is shown on the hackathon page before you register.