Hook0
Hook0 is an open-source Webhooks-as-a-Service platform that manages webhook delivery, retries, and security through an API call.
What Hook0 is
Hook0 is an open-source Webhooks-as-a-Service platform that manages webhook delivery, retries, and security through an API call. Configurable two-phase retries handle delivery failures, and events that exhaust their retry budget can go to a dead letter queue. Hook0 signs payloads with HMAC-SHA256 and timestamps to help subscribers detect replay attempts. Delivery logs show requests, responses, status codes, and latency; events can be replayed from the dashboard or API. A subscriber portal lets customers manage endpoint URLs, secrets, and event filters. Developers can use the REST API, Python and Node.js SDKs, or an MCP server for AI assistants. Hook0 says it connects with more than 3,000 apps through Zapier and also lists Integromat. Its cloud service is hosted in France and keeps customer data in Europe. The free Developer plan is free, with 100 events per day; excess events are blocked. VAT, with excess events billed rather than blocked.
Good
- Configurable retries and a dead letter queue.
- Signed payloads include timestamps.
- Events can be replayed from the dashboard or API.
- REST API and Python and Node.js SDKs.
Watch out
- Free Developer plan blocks events over 100 per day.
- Free plan retains data for seven days.
- Paid Startup plan costs €59/mo excl. VAT.
- Self-hosting excludes managed updates and stated uptime.
Who it suits
Hook0 suits teams that need webhook delivery, retry handling, and event visibility in an API-based workflow. It offers a free developer tier and a self-hosted option, as well as paid cloud plans.
Verdict
Hook0 combines webhook delivery controls with signing, logs, and replay tools. Check the free plan's event cap and whether its support and retention limits fit your needs.
Plans and prices
From Hook0's own pricing page, checked 2 Oct 2026.
| Plan | Price | What it gives you |
|---|---|---|
| Developer | Free | 1 developer · 1 application · 10 event types · 10 subscriptions · 100 events/day · Extra events blocked · 7 days data retention · Community support · FREE Forever |
| Self-hosted | Free | Host your own instance · SSPL-1.0 · Community support · Infrastructure scaling, 99.9% uptime, and managed updates not included · FREE Forever |
| Startup | €59 a month | 25 developers · 1 application · 50 event types · 300 subscriptions · 30,000 events/day · Then €0.003/event · 14 days data retention · Email support (3-day response) · €59 /mo excl. VAT |
| Pro | €190 a month | Unlimited developers, applications, event types, and subscriptions · 100,000 events/day · Then €0.0001/event · 30 days data retention · Priority email support (3-day response) · Static source IPs on demand · €190 /mo excl. VAT; €1,824/yr excl. VAT (20% off) |
| Enterprise | Priced on request | Unlimited everything · Custom events per day · Custom data retention · Custom SLA and dedicated support · Enterprise security and compliance · Static source IPs on demand · Custom /year |
The facts
Each one read from Hook0's own pages, with the date it was checked.
What it does
- API and SDKs
- Hook0 provides a REST API and SDKs for Python and Node.js, plus an MCP server for AI assistants.checked 2 Oct 2026
- Compliance
- Hook0 says its cloud infrastructure is hosted by Clever Cloud in France and cites the provider's SOC 2 and ISO 27001 audits.checked 2 Oct 2026
- Delivery
- Hook0 supports configurable two-phase retries and a dead letter queue when deliveries exhaust their retry budget.checked 2 Oct 2026
- Hosting
- Hook0 says its cloud service is hosted in France and keeps customer data in Europe.checked 2 Oct 2026
- Integrations
- Hook0 says it connects with more than 3,000 apps through Zapier and describes Integromat as another integration option.checked 2 Oct 2026
- Monitoring
- Delivery logs include request, response, status code, and latency, and events can be replayed from the dashboard or API.checked 2 Oct 2026
- Notable limit
- The free Developer plan blocks events over its 100-events-per-day limit, whereas paid Cloud plans bill excess events per event without blocking them.checked 2 Oct 2026
- Product
- Hook0 is an open-source Webhooks-as-a-Service platform that handles webhook delivery, retries, and security from an API call.checked 2 Oct 2026
- Security
- The security page says Hook0 uses a signed DPA, discloses subprocessors, encrypts hourly backups, and restricts production access behind a two-factor VPN.checked 2 Oct 2026
- Signing
- Hook0 signs payloads with HMAC-SHA256 and includes timestamps to help subscribers detect replay attacks.checked 2 Oct 2026
- Subscriber portal
- The subscriber portal lets customers manage their endpoint URLs, secrets, and event filters.checked 2 Oct 2026
- Support
- The free Developer plan includes community support, while paid plans list email or priority email support with a three-day response time.checked 2 Oct 2026
- Use cases
- Hook0 describes use cases including SaaS customer notifications, e-commerce, IoT, data synchronization, and internal service communication.checked 2 Oct 2026
The company
- Company
- Hook0 describes itself as an independent European company that is bootstrapped and has no venture capital funding.checked 2 Oct 2026
- Headquarters
- Chantonnay, Francechecked 28 Sep 2026
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