Hook0 vs ngrok Receiving Webhooks on Localhost
ngrok puts any local service on a public URL. The Hook0 CLI does one narrower thing. It forwards webhooks to your local server through a relay you can self-host. This page compares the two on that job, and says where ngrok is the better pick.
The Short Answer
ngrok and Hook0 overlap on one job, which is getting webhooks onto your laptop while you build. ngrok is a general-purpose ingress that exposes any local HTTP, TCP or TLS service, with custom domains and traffic policies on paid plans. Hook0 is outbound webhooks-as-a-service, and its CLI ships hook0 listen, a WebSocket tunnel that forwards webhooks to localhost without an account. The relay behind it is open source and you can run your own. Use ngrok when you need to expose more than webhooks. Use Hook0 when the webhooks you are testing are the ones your product will send to its users.
Key Differences
General Ingress or Webhook Tunnel
ngrok exposes local HTTP, TCP and TLS services, so it covers demos, APIs, SSH and webhooks alike. hook0 listen 3000 covers webhooks only. It opens a WebSocket to the relay, prints a public URL, and forwards each incoming request to your local port.
No Account to Start
The ngrok agent needs an account and an authtoken before the first tunnel. hook0 listen generates a token locally and connects straight to the public relay, so you get a URL with no signup. Pass --token to keep the same URL across restarts.
A Relay You Can Host Yourself
The Hook0 relay server is open source under SSPL-1.0 and ships with a Helm chart in the Hook0 repository. Point the CLI at your own instance with --relay-url, so test payloads stay on infrastructure you run. ngrok is a hosted service.
Built for the Sending Side
Hook0's main product delivers webhooks to your users, with per-attempt logs, free retries, HMAC signatures and replay. The same CLI sends events, manages subscriptions and replays failures, so you can test the full loop from hook0 event send to your local handler.
Receiving Webhooks Locally
| Feature | Hook0 CLI | ngrok |
|---|---|---|
| Primary role | Outbound webhooks-as-a-service, with a dev tunnel in the CLI | General-purpose ingress and tunnels |
| Protocols exposed | HTTP webhooks forwarded to a local URL | HTTP/S and TCP; TLS on Pay-as-you-go |
| Account needed | No, for hook0 listen |
Yes, account and authtoken |
| Stable URL | Same token gives the same URL (--token) |
One development domain on every plan; custom domains on Pay-as-you-go |
| Free plan | Public relay at no cost | 1 GB data transfer, 20,000 HTTP/S requests, up to 3 endpoints |
| Request inspection | Terminal dashboard (TUI) with headers, body and status | Traffic Inspector, 24 h retention on Free |
| Webhook signature checks | HMAC-SHA256 signing on the sending side | verify-webhook traffic-policy action for many providers |
| Forwarding guard | Localhost only unless --allow-external |
Not applicable (you choose the upstream) |
| Self-host the relay | Yes, open source (SSPL-1.0) with a Helm chart | No, hosted service |
| Install | cargo install (needs Rust) |
Homebrew, apt, Windows store or direct download |
Where ngrok Fits Better
Pick ngrok when you need to expose something other than webhooks, such as a demo app, an API for a teammate, a TCP service, or an endpoint behind a custom domain with traffic policies. It also installs in one command on most systems, while the Hook0 CLI currently installs through Cargo.
Common Questions
Is Hook0 an ngrok alternative?
For one job, yes: receiving webhooks on localhost during development. hook0 listen forwards webhooks to your local server through a WebSocket relay, with no account. For anything beyond webhooks (TCP services, demos, custom domains, traffic policies), ngrok is the broader tool.
How do I receive webhooks on localhost with Hook0?
Install the CLI, then run hook0 listen 3000. It prints a public URL on play.hook0.com. Paste that URL into the provider or into a Hook0 subscription, and every request is forwarded to localhost:3000 and shown in the terminal dashboard.
Do I need an account to use hook0 listen?
No. The CLI generates a token on your machine and connects to the public relay. You need a Hook0 account only to send events through the Hook0 API, for example with hook0 event send.
Can I self-host the Hook0 relay?
Yes. The relay server is in the Hook0 repository under SSPL-1.0, with a Helm chart. Run your instance, then point the CLI at it with --relay-url. Add --insecure if it uses a self-signed certificate.
Can I keep the same webhook URL between sessions?
Yes. The URL comes from the token, so hook0 listen 3000 --token my-stable-token gives you the same URL each time. On ngrok, every plan includes one development domain.
Is Hook0 affiliated with ngrok?
No. ngrok is a trademark of its owner. Hook0 is independent and is not affiliated with or endorsed by ngrok. This page is a factual comparison for developers evaluating both.
How we compared, and our sources
This page compares how each tool receives webhooks on a local machine during development. ngrok figures come from its public pricing page and documentation. Hook0 figures come from the Hook0 CLI and relay source code and the CLI reference.
Sources
- ngrok pricing (consulted 2026-10-06)
- ngrok Share Localhost quickstart (consulted 2026-10-06)
- ngrok verify-webhook action (consulted 2026-10-06)
- Hook0 CLI reference (consulted 2026-10-06)
This is an independent comparison. Hook0 is not affiliated with, endorsed by, or sponsored by ngrok. Product names and trademarks belong to their respective owners, and every competitor figure links to a public source with the date we checked it.
Last reviewed 2026-10-06.
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