Hook0 vs Building Your Own
Every engineering team eventually asks: should we build webhook infrastructure ourselves or use a service?
Here's what "building it yourself" actually involves.
Component breakdown
Webhook delivery is not just "make an HTTP POST when something happens." Here's every component you'll end up building, with realistic time estimates:
| Component | What It Involves | Estimated Hours |
|---|---|---|
| HTTP delivery engine | Queue consumer, connection pooling, timeout handling, redirect following | 40h |
| Retry logic with backoff | Fixed retry schedule, jitter, configurable delays, per-endpoint state | 32h |
| Signature generation | HMAC-SHA256 signing, key rotation, multiple signature schemes | 16h |
| Dead letter queue | Failed event storage, inspection API, manual replay, retention policy | 32h |
| Event type system | Type hierarchy, schema validation, versioning | 24h |
| Subscription management | CRUD API, URL validation, filtering rules, enable/disable | 24h |
| Delivery logging | Request/response storage, timing data, searchable history | 24h |
| Dashboard UI | Event browser, delivery status, replay controls, subscription management | 80h |
| Monitoring & alerting | Success rate tracking, latency metrics, endpoint health, circuit breakers | 32h |
| Multi-tenant isolation | Per-tenant rate limits, data isolation, access control | 40h |
| API authentication | Token management, scoping, rotation | 24h |
| Circuit breakers | Per-endpoint failure tracking, automatic disable/re-enable | 16h |
| Rate limiting | Per-endpoint and global rate limits, backpressure | 12h |
| Total | 396h |
That's roughly 10 engineering weeks. At $150/hour fully loaded, that's $59,400 in engineering time, before ongoing maintenance.
The costs you don't plan for
The 396 hours above gets you to "it works." Then reality hits:
Ongoing maintenance
- Queue infrastructure monitoring and scaling
- Database growth management (delivery logs accumulate fast)
- Security patches for HTTP client libraries
- On-call rotation for delivery failures
- Schema migration when you add features
Edge cases you'll discover in production
- Endpoints that accept the connection but never respond (slow loris)
- Endpoints that return 200 but with an error body
- DNS resolution failures that are transient vs permanent
- TLS certificate issues on customer endpoints
- Redirect loops
- IPv6-only endpoints
- Endpoints behind CDNs that cache POST requests (yes, this happens)
Opportunity cost
Every hour on webhook infrastructure is an hour not on your product. For a startup, 10 weeks of engineering time can be the difference between shipping a feature that wins a deal or not.
Build your own if
- You need custom protocols beyond HTTP, delivery to message queues, or non-standard auth
- You process billions of events daily and have the team to operate custom infrastructure
- Webhooks are your core product (if you're building a webhook platform, obviously build it)
- Regulatory requirements prohibit third-party services (though Hook0 self-hosting works in air-gapped environments too)
Pick Hook0 if
- You want to ship webhook support this week, not next quarter
- You'd rather maintain your product than your infrastructure
- You need self-hosting without building from scratch
- You're a small team: you don't have 10 engineering weeks to spare and you don't have the ops capacity for custom infrastructure
Start with Hook0, migrate if needed
Hook0 is open-source (SSPL-1.0). If you outgrow the hosted service:
- Self-host Hook0 on your own infrastructure
- Fork and customize if you need specific behavior
- Use the codebase as a reference implementation if you decide to build from scratch
You're not locked in. The code is there. The API is documented. See the Getting started tutorial to have your first webhook running in 10 minutes.
Cost comparison
| Build Your Own | Hook0 Cloud | Hook0 Self-Hosted | |
|---|---|---|---|
| Initial engineering | ~$59,400 (396h) | $0 | ~$2,000 (setup) |
| Monthly maintenance | ~$5,000-10,000 (engineering time) | Usage-based pricing | Infrastructure costs only |
| Time to first webhook | 2-3 months | 10 minutes | 1-2 hours |
| Ongoing feature development | On you | Included | Community + your contributions |
Further reading
- All webhook service comparisons -- how Hook0 compares to Svix, Hookdeck, and others
- Webhook retry logic -- the retry system you'd otherwise build yourself
- Webhook best practices -- production patterns for producers and consumers