HookReplay.dev's answer

Still early — just launched. Currently used by indie developers and small teams debugging Stripe and Shopify integrations. No big logos yet. Focused on building a great product first.

Hookmetry's answer:

Since Hookmetry is still early‑stage, it’s focused on individual developers and small SaaS teams testing webhook reliability. As traction grows, we can list customers like:

– SaaS startups migrating webhook endpoints

– Indie developers debugging Stripe/Razorpay integrations

– Teams needing observability into retries and payload drift

HookReplay.dev's answer

With ngrok, every code change means triggering another webhook. Add a log? Trigger again. Set a breakpoint? Too late, it timed out. Trigger again. With HookReplay, you trigger once. Then replay 100 times while you debug. Same webhook. Same payload. Unlimited attempts to get your code right. That's not a small difference — it's hours saved per debugging session.

Hookmetry's answer:

Most competitors only inspect payloads or provide basic forwarding. Hookmetry goes deeper:

1. Zero-Configuration Setup: Create secure public endpoints in one click. You can start capturing and inspecting live webhooks from any provider in under 5 seconds.
2. Bulletproof Security & Trust: Cryptographic signature validation happens automatically. Stop guessing why your Stripe, GitHub, or Shopify signature verification failed; Hookmetry checks them in real-time.
3. Massive Time Savings (One-Click Replay): No more waiting for Stripe or GitHub to retry a failed webhook. Select the failed event, click "Replay," and send the exact original payload back to your handler.
4. No-Setup Local Tunneling: Easily forward webhooks to your local machine (http://localhost:3000) to test and develop webhook-dependent features locally.
5. Frictionless Collaboration: Share encrypted debug sessions with teammates or third-party API support staff with secure, shareable links, avoiding copy-pasting messy JSON payloads into Slack.
6. AI Diagnostics Engine: When a webhook fails, Hookmetry analyzes headers, body content, and provider-specific schemas to tell you exactly what went wrong and how to fix it.

This makes Hookmetry the developer’s debugging companion, not just another inspection tool.

HookReplay.dev's answer

Developers who integrate third-party webhooks Stripe, Shopify, GitHub, Twilio, Paddle, etc. Basically anyone who's ever clicked "Send test webhook" more times than they'd like to admit.

Hookmetry's answer:

Hookmetry is built for:

• Backend & Full-Stack Developers building integrations with third-party SaaS APIs (payment gateways, authentication providers, communication platforms).
• QA & Testing Engineers simulating complex event-driven user journeys without manually triggering actions in dashboard sandboxes.
• DevOps & Platform Teams monitoring API health, latency patterns, and retry behaviors in staging and production systems.
• Technical Support Engineers diagnosing issues for customers who report that "events aren't syncing" between platforms.

Its audience is technical, hands‑on, and focused on reliability in production systems.

HookReplay.dev's answer

11pm on a Sunday. A customer's Stripe payment went through, but their subscription wasn't created. I needed to debug the webhook handler. Set up ngrok. Triggered a test payment. Added a log statement. Triggered again. Set a breakpoint — webhook timed out before I could step through. Triggered again. Changed the URL in Stripe because ngrok restarted. Triggered again. Three hours later, I found a typo in my event type check. I remember thinking: I just re-triggered the same webhook 40+ times. Why can't I just capture it once and replay it until I find the bug? That's the moment HookReplay was born. The tool I wished existed that night.

Hookmetry's answer:

Hookmetry was born from a founder’s frustration with silent webhook failures during SaaS migrations. Existing tools showed payloads but didn’t explain why signatures failed or retries multiplied. The product was built to solve real developer pains, starting with Stripe and Razorpay signature mismatches, and has grown into a platform for webhook observability and debugging.

HookReplay.dev's answer

ASP.NET Core for the backend, PostgreSQL for storage, WebSockets for real-time forwarding to the CLI. The CLI is built in .NET and distributed via npm — runs on macOS, Windows, and Linux. Nothing fancy. Boring tech that works.

Hookmetry's answer:

Hookmetry is engineered for ultra-low latency event ingestion, high availability, and real-time telemetry rendering. To achieve this, the platform is built on a modern, robust, and highly reliable technology stack:

• Backend Engine (Node.js & Fastify): Our core ingestion layer is powered by Fastify, a next-generation, low-overhead Node.js web framework. Fastify is benchmarked to process HTTP requests up to 2x faster than Express, ensuring that incoming webhooks are acknowledged with microsecond-level response times.
• Real-Time Data Layer (PostgreSQL & Redis): We utilize PostgreSQL for ACID-compliant storage of persistent configurations, user accounts, and metadata. In parallel, Redis handles high-speed caching, dynamic rate-limiting, and real-time event streaming to deliver instant updates to the frontend dashboard.
• Interactive Dashboard (React & Vite): Powering a lightning-fast, highly responsive single-page dashboard. Vite ensures sub-second development updates and extremely optimized production bundles.
• Sleek Interface (Tailwind CSS & Recharts): Crafted with a developer-first, high-fidelity user interface. Tailwind CSS powers a responsive, dark-mode native design with fluid transitions, while Recharts renders real-time telemetry, response times, and failure patterns in intuitive visual charts.
• Security & Validation Layer: Native, cryptographic verification engines supporting automated signature checks for Stripe, GitHub, Shopify, Razorpay, Svix, Clerk, Twilio, and custom HMAC configurations.

HookReplay.dev's answer

Three things most webhook tools don't do: 1- Replay the same webhook unlimited times 2- Edit payloads before replaying (test edge cases) 3- Keep a full history of every webhook received HookReplay does all three, plus real-time forwarding like ngrok.

Hookmetry's answer:

Hookmetry is an AI-powered webhook telemetry and observability platform built for modern development teams. Webhooks are the nervous system of modern software, connecting services like Stripe, Clerk, and GitHub to your application. However, when they fail, they fail silently—causing lost revenue, broken user onboarding, or out-of-sync databases.

Hookmetry acts as an intelligent proxy that captures, decodes, and reconstructs every webhook event. It gives developers full visibility into raw headers, payloads, response times, and cryptographic signatures. With advanced features like one-click replays, local server forwarding, and an AI-powered diagnostic engine, Hookmetry reduces webhook troubleshooting time from hours to seconds.