A unified, OpenAI-compatible gateway to every major LLM provider. One endpoint, one key, one bill - with automatic routing and failover.
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Vapi
Retell AI
Bland AI
Eleven Labs
Voiceflow
Deepgram
Bolna
Smith.ai
PromptLayer
Langfuse
Helicone AI
PromptHub
LangSmith
AI Prompt Finder
AI Prompt Generator
Promptaa
PromptLayerNo features have been listed yet.
Based on our record, Vapi should be more popular than PromptLayer. It has been mentiond 9 times since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
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 services that may require a single system prompt for the underlying model's operations. - Source: dev.to / 6 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 using this technology. [0] https://vapi.ai/. - Source: Hacker News / 7 months ago
### Resources **VAPI Documentation:** [vapi.ai/docs](https://vapi.ai/docs) โ Voice agent API, webhook integration, real-time call transcription, intent detection endpoints, assistant configuration, function calling. **Twilio Voice API:** [twilio.com/docs/voice](https://twilio.com/docs/voice) โ Phone integration, call handling, webhook callbacks, TwiML response formatting, call status tracking. **GitHub... - Source: dev.to / 8 months ago
## Resources **VAPI**: Get Started with VAPI โ [https://vapi.ai/?aff=misal](https://vapi.ai/?aff=misal) **VAPI Documentation:** Official [VAPI API reference](https://docs.vapi.ai) covers WebSocket voice streaming, real-time transcription configuration, and function calling patterns for conversational AI. **Twilio Voice API:** [Twilio Media Streams](https://www.twilio.com/docs/voice/media-streams) documentation... - Source: dev.to / 8 months ago
Paul Atreides uses the Voice as a tool for control and assertion. Imagine commandeering an AI agent with this voice. We built an AI agent using Composio, Vapi, and OpenAI TTS integrated with Gmail, Slack, and Google Calendar. It can summarise emails, schedule meetings, and search for Slack messages. Your entire morning routine is stress-free. - Source: dev.to / 11 months ago
Looks nice, and it's nice that it also supports function call simulation. I've been collecting a list of tools for prompt engineering, I've added Knit now. Newly added: https://promptknit.com/ Newly added: https://github.com/promptfoo/promptfoo https://promptable.ai/ https://github.com/ianarawjo/ChainForge https://promptknit.com/ https://promptrefine.com/ https://www.vellum.ai/ https://www.everyprompt.com/... - Source: Hacker News / about 3 years ago
Retell AI - API that enables developers to build human-like voice agents
Langfuse - Langfuse is an open-source LLM engineering platform that helps teams collaboratively debug, analyze, and iterate on their LLM applications.
Bland AI - An AI Phone Calling API
Helicone AI - Open-source LLM Observability for Developers
Eleven Labs - The most realistic and versatile AI speech software, ever. Eleven brings the most compelling, rich and lifelike voices to creators and publishers seeking the ultimate tools for storytelling.
PromptHub - Test, deploy, and manage your prompts with PromptHub, a prompt management tool designed to be usable by your whole team, not just engineers.