Open-source discovery
Find open-source building blocks
Tell us what you are building and find the open-source projects it usually needs. Every result shows license, maintenance, maturity and adoption signals, and Ossy helps you compare the candidates.
Create a free account with your email and a password. Prefer no password? Sign in with an emailed link instead.
Not sure where to start? Browse by what you are building.
Features
What you can do
Search by what you need
Describe the building block ("auth library", "vector database") and get matching open-source projects.
Filter by license and source
Narrow by tags, stars, platform (GitHub and more) and license constraints such as permissive or no copyleft.
Ask Ossy
Chat about the results: compare candidates, ask follow-ups, and let Ossy search projects, tools and packages for you.
Shortlist and export
Select the projects worth a closer look and export the list as Markdown or plain text.
Discovery only, not legal advice: check each project's license and terms before you use it. Read the disclaimer.
Starting points
What are you building?
Pick the closest match for ready-made searches. You sign in first, then the catalog opens with the search already set. See all starting points
A SaaS or web app
Accounts, billing, a database and a way to see what is happening.An API or backend service
Storage, background work, authentication and monitoring.An AI feature or agent
Vector search, agent frameworks and the data behind them.A content or marketing site
A CMS for editors and privacy-friendly analytics.An internal tool
Sign-in, a database, reports and jobs that run in the background.
Pricing
Free and Premium
Provisional plans: limits may change and Premium pricing is not set yet.
Free
Free
No card needed
Everything you need to search and compare.
- Results per pageUp to 20
- Ask Ossy (chat)10 messages a day
- Export the selection (Markdown / text)Not included
- Saved shortlists on your account2 lists, 10 repos each
Premium More room
To be announced
Billed monthly
For keeping your research: more saved lists with more repos each, so more of your shortlist stays in one place. Email alerts about saved projects are planned and not switched on yet.
- Results per pageUp to 100
- Ask Ossy (chat)Unlimited
- Export the selection (Markdown / text)Included
- Saved shortlists on your account20 lists, 50 repos each
Compare plans
| Feature | Free | Premium |
|---|---|---|
| Search by need, tags and filters | Included | Included |
| License and source filters | Included | Included |
| Results per page | Up to 20 | Up to 100 |
| Ask Ossy (chat) | 10 messages a day | Unlimited |
| Export the selection (Markdown / text) | Not included | Included |
| Compare shortlisted repos side by side | Up to 2 | Up to 4 |
| Saved shortlists on your account | 2 lists, 10 repos each | 20 lists, 50 repos each |
| Ossy project note (up to 400 characters) | Kept in this browser | Kept on your account, on every device |
| Price | Free | To be announced |
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