
Retell AI
Bland AI
Smith.ai
Bolna
Deepgram
Voiceflow
Goodcall
Voice AI Infrastructure for the Internet

hookVM
Webhook.site
ngrok
Hooklistener
Webhooks.cc
Hookmetry
RequestBin
Debug webhooks on localhost in seconds. Receive, inspect, edit, and replay webhooks directly to your localhost using a CLI and WebSockets. No tunneling hacks. Free to start.

Which is more popular?
Based on our record, Vapi seems to be more popular. It has been mentioned 9 times since March 2021.
Website, pricing, platforms and company facts side by side.
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| Website | vapi.ai | hookreplay.dev |
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What each product offers, as listed by its team.


No features have been listed yet.
Possible disadvantages
An editorial look at what each product does well and who it suits.


No analysis of Vapi yet.
Overall verdict
Why this product is good
Recommended for
Walkthroughs and reviews on video.
Exploring Vapi A Quick Review - Discuss what is needed to compare to Air.Ai
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How often each product is chosen within a category, 0–100% relative to the other.


As answered by people managing Vapi and HookReplay.dev.
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.
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.
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.
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.
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.
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.
Share your experience with using Vapi and HookReplay.dev. For example, how are they different and which one is better?
External articles and on-site reviews we used to compare the two products.


Developers shouldn’t have to guess what happens to their conversations once they hit the platform. With Vapi and Retell, “ownership” often comes with strings attached. SigmaMind AI takes the opposite stance: your data...
Iâd recommend Vapi if you are planning to create advanced AI meeting agents. It is great for creating custom flows and integrates easily with all of your databases, CRMs, and knowledge bases.
Vapi is a San Francisco-based AI Voice Agent Development Agency founded 2023. This company is well-known for its developer-first platform that supports businesses to deploy their own AI voice agents. Vapi is one of...
We have no reviews of HookReplay.dev yet. Be the first one to post
Recommendations tracked on public social media and blogs since March 2021.


The Vapi platform helps developers build and deploy voice agents and AI products in Python, React, and TypeScript. It provides two ways to make intelligent voice apps. It's assistant's option allows you to create simple conversational... - Source: dev.to / 8 months ago
It can make/take phone calls[0], but they need to be prompted on the nature of the call, the data they need, and how to collect it. They can also output the results of the call via API. An AI agent from Masterworks recently called me... - Source: Hacker News / 9 months ago
### Resources **VAPI Documentation:** [vapi.ai/docs](https://vapi.ai/docs) – Voice agent API, webhook integration, real-time call transcription, intent detection endpoints, assistant configuration, function calling. **Twilio Voice... - Source: dev.to / 10 months ago
Tracking HookReplay.dev since Jan 2026.
When comparing Vapi and HookReplay.dev, you can also consider the following products.

API that enables developers to build human-like voice agents
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Receive, deliver, and debug webhooks with reliability, observability, and developer-first tooling.
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Instantly generate a free, unique URL and email address to test, inspect, and automate (with a visual workflow editor and scripts) incoming HTTP requests and emails.
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Smith.a is one of the best virtual receptionist and chat services that offer phone calls, answer chats and take messages for you and your staff.
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ngrok enables secure introspectable tunnels to localhost webhook development tool and debugging tool.
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