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.

zhook.dev's answer:

As a project that prioritizes the developer community, Zhook's current user base consists of:

-Hobbyists and Independent Makers: Utilizing the generous free tier for side projects and IoT experimentation.

-Production Development Teams: Using Pro and Business tiers for mission-critical webhooks and backend ingress.

-IoT Integrators: Users leveraging the MQTT-to-HTTP bridge for automated event routing.

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.

zhook.dev's answer:

Developers should choose Zhook when they need permanent infrastructure rather than a temporary development tool.

Eliminates "Glue Code": It replaces the need for custom Lambda functions or scripts used solely for payload reformatting or MQTT bridging.

Resilience against Schema Changes: The AI-assisted ETL allows product or business teams to fix broken mappings without waiting for a developer to redeploy code.

Real-time Reliability: It utilizes distributed WebSocket connections and Redis-backed memory to ensure events are delivered as fast as possible with a large retry window for downtime protection.

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.

zhook.dev's answer:

Backend Engineers: Developers tired of writing repetitive boilerplate for webhook ingestion and security.

AI & Automation Developers: Teams building "Agent-Ready" backends that require standardized data mappings. IoT & Hardware Hobbyists: People tinkering with Arduinos and ESPs who need an easy way to bridge MQTT data to standard web services.

Enterprise Teams: Organizations requiring long-term audit trails (Vault) and compliance-ready data archiving.

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.

zhook.dev's answer:

We're 3 devs who met on an MMORPG in 2006 and have been building cool things since.

The project was born from nearly 20 years of shared history in the software industry. The founders noticed they were repeatedly rebuilding the same "front door" infrastructure for private backends across different companies and decided to build a definitive, all-in-one service to address those recurring pain points once and for all.

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.

zhook.dev's answer:

Zhook is built for high-concurrency and real-time responsiveness using a modern distributed stack:

Real-time Layer: Distributed WebSocket connections.

Memory & Ingress: Redis and distributed memory systems.

Transformation Engines: JSONata and Python-based sandboxes for payload mapping.

Developer Tooling: An NPM-based client and a specialized CLI for terminal-based event streaming.

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.

zhook.dev's answer:

Zhook differentiates itself by moving beyond simple "tunneling" to become an intelligent event orchestration layer.

-The 2-Year Immutable Vault: Unlike temporary tunnels, Zhook provides a searchable, permanent record of every event for compliance and auditing.

-Native AI Transformation: It includes a central management layer that uses AI and MCP to map incoming payloads to your backend's expected schema in real-time.

-MQTT-to-HTTP Bridge: It functions as a global subscriber that can trigger webhooks based on IoT broker patterns without requiring external glue code.

-Multi-Format Support: While most competitors focus on JSON, Zhook handles large files, plaintext, and binary data out of the box.