head to head · open source
novu vs keploy
novu has 40,002 GitHub stars, 4,494 forks, 105 open issues and last shipped yesterday. keploy has 18,463 stars, 2,357 forks, 725 open issues and last shipped yesterday. novu leads on adoption by 117% (40,002 vs 18,463 stars). novu is written in TypeScript under a custom or non-standard licence; keploy is written in Go under Apache-2.0. novu has attracted 11% as many forks as stars, keploy 13%. novu was the more recently maintained of the two, and both are self-hostable with no licence fee.
Two open source projects, one decision. Both are free and self-hostable — the differences are community size, license terms, language stack and release pace.
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Side by side
| novu | keploy | |
|---|---|---|
| GitHub stars | ★ 40K | ★ 18K |
| License | Custom / other | Apache-2.0 |
| Written in | TypeScript | Go |
| Last push | 2026-09-17 | 2026-09-17 |
| Forks | ⑂ 4.5K | ⑂ 2.4K |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick novu if
- You weight community size — 40K stars and counting
- You want the Custom / other license terms
- Your stack matches TypeScript
- You value the larger contributor base for long-term maintenance
pick keploy if
- You want the keploy feature set and don't need the biggest community
- You prefer the Apache-2.0 license terms
- Your stack matches Go
- You evaluated both and keploy fits your workflow better
About novu
Novu is an open source communication infrastructure platform for building and managing multi channel notifications in products and connecting them to AI agents. It lives in the Node.js/TypeScript ecosystem and targets developers who need to send and receive messages across email, SMS, push, in app inbox, chat, and collaboration tools like Slack and Microsoft Teams.
About keploy
Keploy is an open source Go project in the API and integration testing ecosystem. It is a developer centric API and integration testing tool that creates safe, isolated production sandboxes for API, integration, and end to end testing. The project records API calls, database queries, and streaming events, then replays them as tests and data mocks. It captures traffic at the network layer with eBPF, so the README says it is code less and language agnostic.
read the full keploy overview →
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Frequently asked questions
Is novu or keploy more popular?
novu has 40,002 GitHub stars and keploy has 18,463. novu has the larger community by that measure.
Are novu and keploy free?
Both are open source. novu has no licence declared in this registry, and keploy is licensed under Apache-2.0. Both are free to self-host.
What is the difference between novu and keploy?
novu is written in TypeScript and keploy in Go. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, novu or keploy?
Choose novu if you want the larger community (40,002 stars) or its Custom / other licence terms. Choose keploy if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.