Novu
Open-source notification infrastructure.
Novu is the leading open-source notification platform. Self-host or use the cloud. Workflow editor, multi-channel routing, in-app feed component, BYO providers.
Judged purely as an API. What the request contract guarantees on retry, how complete the webhook event coverage is, whether suppressions are readable and writable programmatically, and how much the message log retains when something needs debugging in production.
Against high-frequency programmatic sends where a missed delivery is a product failure, Novu covers idempotency keys, webhook coverage, event stream, the suppressions API, batch sending, and SDK breadth, and does not cover operating track record. Whether that gap matters depends on how central those are to the build.
- Idempotency keys: Yes
- Webhooks: Yes
- Event stream: Yes
- Operating since: 2021
- Suppressions API: Yes
- Best published rate per 1,000: Tiers not published in comparable form
- Batch sending: Yes
- SDKs: node, python, go, php, java, dotnet
- Deliverability: BYO provider.
BYO provider.
Teams that want self-hostable notification infrastructure.
- › Open source, MIT-licensed
- › Self-hostable
- › Active community
- › Self-hosting takes effort
- › Cloud pricing competitive only above 1M events/mo
Features at a glance
| API | Yes |
| SMTP | No |
| SDKs | node, python, go, php, java, dotnet |
| Webhooks | Yes |
| Templates | rich |
| React Email | Yes |
| Batch send | Yes |
| Scheduled send | Yes |
| Suppressions | Yes |
| Multi-tenant | Yes |
| Inbound parsing | No |
| Event stream | Yes |
| Idempotency keys | Yes |
| Dedicated IP | No |
Appears in rankings
8 Best Self-Hosted Email Tools (2026), Tested
Open-source notification infrastructure with email as one channel.
6 Best Notification Infrastructure Tools (2026), Tested
Open-source champion. Self-host or cloud, with BYO providers for email delivery.
12 Best Open-Source Email Tools (2026), Tested
Notification orchestration across channels.
10 Best Email Tools for Multi-Tenant SaaS (2026), Tested
Open-source and cloud paths for product teams building tenant-aware notification infrastructure.