Hook0

Hook0 is an open-source webhooks-as-a-service platform that lets developers send webhooks with a single API call, handling deliverability, retries, and security ^S1. It is used by developers who need to provide webhook functionality to their users without building and maintaining the infrastructure themselves ^{S1 S87}. The main practical value is reducing the time to first webhook from multiple engineering sprints to about 30 minutes, with features like HMAC signatures, two-phase retries, and delivery logs ^{S87 S1}.

• Identity: Hook0 is an open-source webhooks-as-a-service (WaaS) platform ^S1.
• Core purpose: It solves the problem of building and maintaining webhook infrastructure, which typically requires multiple engineering sprints ^S87.
• Intended users: Developers who need to send webhooks from their applications and let their users subscribe to events ^S1.
• Product scope: It is a single platform offering a cloud service, a self-hostable open-source version, and a REST API ^S87.
• Positioning: Hook0 positions itself as a fully open-source alternative to proprietary webhook services, with no open-core tier ^S87.
• Claimed distinction: It claims to be fully open-source (SSPL-1.0) and bootstrapped, with no VC pressure on pricing ^{S87 S1}.

Webhooks As A Service. hook0.com: an estimated 8,624 total monthly visits and about 107 monthly organic visits across 48 ranking keywords. Scout crawled 9 pages and measured a technical health score of 87/100.

• Total traffic (modeled): 8,624 monthly visits across all channels.
• Organic search traffic (estimated): 107 monthly visits from search.
• Strongest sampled ranking: webhook services at position 2.
• Leading page in the collected evidence: https://www.hook0.com/.
• Closest measured organic competitor: infobip.com, appearing 1 times in the sampled first-page SERPs.
• Technical crawl: 9 pages, health score 87/100.

Website intelligence — Collected evidence

Company identity and positioning

Total website traffic

Domain identity

Website capture

Top organic keywords

Independent Google result page

Query: webhook services

Website intelligence — Collected evidence

Prioritized website intelligence pages

Features

Pricing and plans

Integrations and supported platforms

Product and company updates

No supporting public-page evidence was collected for this category.

This analysis created the first position baseline at 2026-10-23T14:39:58.184Z. Movement appears after the next fresh analysis using the same location and language.

Sampled competitors

Website intelligence — Collected evidence

Customers, testimonials, and first-party review claims

No supporting public-page evidence was collected for this category.

Independent review sources discovered

No links to supported independent review platforms were discovered on the collected pages.

AI-assistant referral traffic

• Estimated current generative-AI referral share: 1.6%

Scout traffic model did not return a separate AI-referral trend series for this domain.

Website intelligence — Collected evidence

Site-stated AI capabilities

These are first-party product claims, not independent measurements of AI-search visibility.

Website intelligence — Collected evidence

Website evidence gaps

• customers: no usable public page was collected; verify whether the site publishes this evidence.
• reviews: no usable public page was collected; verify whether the site publishes this evidence.
• changes: no usable public page was collected; verify whether the site publishes this evidence.
• identity: no usable public page was collected; verify whether the site publishes this evidence.

Independent reviews

Customer proof

No named customers, testimonials, or customer case studies were found.

Independent mentions

• hook0/hook0 — # hook0/hook0 ... Open-source webhook server that helps you provide webhooks to your users. It handles for you a great amount of features that are usually tedious to (re)implement. - Stars: 1477 - Forks: 101 - Watchers: 1477 - Open issues: 5 - License: Other - Homepage: https://www.hook0.com - Default branch: master - Created: 2021-07-20T13:42:17Z ... - Discord (Live Discussions) - Gitlab Issues (Report Bugs, Questions, Feature Requests) - Twitter (Latest News) - Website (Login, sign up)
• Hook0: Free Webhook Platform, HMAC Signatures, EU Hosting — Hook0 is an Open-Source Webhooks-as-a-service (WaaS) that makes it easy for developers to send webhooks. Developers make one API call, and Hook0 takes care of deliverability, retries, security, and more.
• Webhook Platform: Send, Sign, Retry, Monitor / Hook0 — Hook0 is an open-source webhook platform that sends events to your subscribers with HMAC-SHA256 signatures, two-phase retries that back off over days, and a dead letter queue when an endpoint stays down. Every delivery is logged with request, response, status code and latency, and you can replay any event from the dashboard. A drop-in subscriber portal lets your users manage their own endpoints, secrets and event filters, so support stops fielding secret-rotation tickets. Run it self-hosted on D
• Hook0 Pricing: Free Tier, and What Happens When You Go Over — Hook0 has a free Developer plan with 100 webhook events a day, HMAC signatures and delivery monitoring, and no credit card. Paid Cloud plans start at €59 a month for Startup, with Pro for higher volume. On paid plans, overage is billed per event rather than blocked (€0.003 on Startup, €0.0001 on Pro), so a traffic spike never interrupts delivery. Retries, HMAC signing and delivery logs are included, with no per-endpoint fees. Hook0 Cloud runs on EU
• Webhook API: One REST Call to Deliver Events / Hook0 — takes care of delivery. It signs each request with HMAC-SHA256, retries failed endpoints in two phases (fast retries for short blips, slow ... delivery logs. Pass your own event_id and Hook0 deduplicates on it, so a retried call never fires twice
• Releases · hook0/hook0 · GitHub — ## Release list ## frontend/v1.2.1 frontend/v1.2.1 hook0-bot released this 21 Sep 23:01 frontend/v1.2.1 `ea5ac0a` ... :1.2.1` (DockerHub) - `ghcr.io/hook0/hook0-frontend:1.2.1` ... GHCR) - `registry.gitlab.com/hook0/hook0/hook0-frontend:1.2.1`
• Explanation / Hook0 Documentation — ​ Webhooks that just work. - Straightforward API - Documentation with working examples - Multiple SDKs - Local development support: `hook0 listen` forwards webhooks to a port on your machine (Hook0 CLI vs ngrok for receiving webhooks on localhost)
• Hook0 — Hook0 (also written "hook zero" or "hook0") is an open-source webhooks-as-a-service platform. Developers make one API call — Hook0 handles retries, HMAC signatures, delivery monitoring, and EU-hosted compliance. ... /hook0 - GitHub: github.com/hook0 - Web

External links were grounded in one live web search. Search snippets are leads, not independently scraped page content; rejected links remain available in Review evidence.

Not found on the collected pages: contact and support. This only means Scout did not find it on the pages it read; it says nothing about the company itself.

Not found in the collected public sources: public roadmap, changelog or release notes, status page, separate help center or knowledge base.

Not measurable: wayback: rate limited by archive.org, ladder stopped after 1 probe(s). A gap here means the lookup was unavailable, not that the finding is negative.

Scout — Bounded technical crawl

• Pages crawled: 9 of 15 maximum
• Technical health: 87/100
• Critical issues: 0
• Warnings: 20
• Notices: 8

Issues

Crawled pages

This is a bounded Scout crawl. Core Web Vitals and Lighthouse scores are not claimed unless a dedicated performance audit is connected.

Modeled acquisition channels

First-party connections

No first-party Search Console or Analytics numbers are shown until the site owner authorizes the corresponding Google account. Scout traffic model values above are modeled estimates, not private analytics totals.

The collected pages mention competitors Svix and Hookdeck in pricing comparisons ^S81, but no detailed feature-by-feature comparison is provided. Evidence gaps include lack of independent customer reviews, detailed security certifications beyond PCI for Stripe, and specific uptime SLAs for cloud plans. Open questions remain about the exact scope of the Enterprise plan and the level of support included in the free tier.

This report is based on 15 collected pages from hook0.com, including the homepage, pricing, webhook platform, webhook API, GDPR subprocessors, privacy policy, and security pages. The collection used static and browser rendering rendering, with a sitemap mapping 106 URLs. External proof search was performed but no additional verification requests were made. Limitations: the report relies solely on vendor-published information; no independent customer or third-party reviews were collected.

• Official Websitehttps://www.hook0.com/Verified
• Pricing Pagehttps://www.hook0.com/pricingVerified
• Official Websitehttps://www.hook0.com/webhook-platformVerified
• Documentationhttps://www.hook0.com/webhook-apiVerified
• Official Websitehttps://www.hook0.com/gdpr-subprocessorsVerified
• Official Websitehttps://www.hook0.com/privacy-policyVerified
• Official Websitehttps://www.hook0.com/securityVerified
• Official Websitehttps://www.hook0.com/termsVerified
• Official Websitehttps://www.hook0.com/terms-of-saleVerified
• Official Websitehttps://www.hook0.com/eu-webhook-infrastructureVerified
• Official Websitehttps://www.hook0.com/build-vs-buy-webhooksVerified
• Official Websitehttps://www.hook0.com/built-to-lastVerified
• Official Websitehttps://www.hook0.com/data-processing-addendumVerified
• Official Websitehttps://www.hook0.com/entitymapVerified
• Articlehttps://github.com/hook0/hook0/Verified
• Review Sitehttps://webhookadmin.com/en/blog/webhook-delivery-services-compared/Verified
• Review Sitehttps://www.blog.brightcoding.dev/2025/08/10/hook0-the-open-source-webhook-server-that-lets-your-app-speak-to-the-worldVerified
• Articlehttps://github.com/hook0/hook0/releasesVerified
• Articlehttps://documentation.hook0.com/explanationVerified
• Articlehttps://www.linkedin.com/company/hook0Verified