Important Dates:
- Start: September 16, 2025
- Submission Deadline: October 1, 2025 (12 PM PT)
- Winners Announced: October 7, 2025

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Modern Stack Hackathon – Convex

Theme:
Build a new app (must start after Sept 16) using any/all modern stack sponsors: Convex, Firecrawl, Vapi, Better-Auth, Autumn, Resend, OpenAI.

Prizes:

• Overall Winner: $10,000 cash + major partner perks
• Second Place: $3,000 cash + perks
• Third Place: $2,000 cash + perks
• Best Use of OpenAI: $5,000 in OpenAI credits
• $20,000 total (cash, credits, products)

How to Participate:

1. Build a new app—project must be started after Sept 16, using at least one sponsor.
2. Share progress—post and tag sponsors on Twitter (X) or LinkedIn.
3. Submit—upload with video demo to vibeapps.dev, use the modernstack tag, before the deadline. No localhost demos allowed.

Registration:
Required via Luma: luma.com/modernstackhackathonv1

Resources:
Docs and getting started links for each sponsor (Convex, Firecrawl, Vapi, Better-Auth, Autumn, Resend, OpenAI), Convex Discord.

Judging:
Panel of engineers, founders, and dev advocates from Convex and sponsor orgs.

Rules:

• New builds only (post-Sept 16)
• Must use at least one sponsor product or platform
• Demo must be publicly accessible (no localhost)
• Submit before deadline
• Multiple entries allowed
• Source code doesn't need to be public

Official Page:
convex.dev/hackathons/modernstack

Submission:
Use vibeapps.dev and tag your project with modernstack.
Public web demo required (no localhost).

Support:
Convex and sponsor docs, Discord channels

thank you:

• Thank you to this guy for the helping understand p2p with webrtc so easily