AI · alternatives · 2026
24 alternatives to AI Voice Agent SDK
The open-source framework for real-time AI voice
AI Voice Agent SDK is an open-source framework that enables developers to build real-time voice agents and virtual avatars for various applications including telephony, web, mobile, robotics, and wearables. It provides… Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes.
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Video SDK 3.0▲770Build and integrate real-time multimodal AI characters.
2024 · videosdk.live · its alternatives →
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Tighter instruction adherence in speech agents
Feb 2026 · developers.openai.com · its alternatives →
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I've been obsessed for the past ~year with the possibilities of talking to LLMs. I built a bunch of one-off prototypes, shared code on X, started a Meetup group in SF, and co-hosted a big hackathon. It turns out that there are a few low-level problems that everybody building conversational/real-time AI needs to solve on the way to building/shipping something that works well: low-latency media transport, echo cancellation, voice activity detection, phrase endpointing, pipelining data between models/services, handling voice interruptions, swapping out different…
2024 · github.com · its alternatives →
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Research teams trust. Conversations customers love.
2025 · getperspective.ai · its alternatives →
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Have a natural, spoken conversation with AI! Contribute to KoljaB/RealtimeVoiceChat development by creating an account on GitHub.
2025 · github.com · its alternatives →
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Agenta▲362Open-source prompt management & evals for AI teams
Nov 2025 · agenta.ai · its alternatives →
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Hey HN, we've been working with OpenAI for the past few months on the new Realtime API. The goal is to give everyone access to the same stack that underpins Advanced Voice in the ChatGPT app. Under the hood it works like this: - A user's speech is captured by a LiveKit client SDK in the ChatGPT app - Their speech is streamed using WebRTC to OpenAI’s voice agent - The agent relays the speech prompt over websocket to GPT-4o - GPT-4o runs inference and streams speech packets (over websocket) back to the agent - The agent relays generated speech using WebRTC back to the user’s device The…
2024 · github.com · its alternatives →
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Pushing the boundaries of conversational AI
2025 · rapport.cloud · its alternatives →
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Chikka▲444Uncover user insights with intelligent AI voice interviewer
2025 · chikka.ai · its alternatives →
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Premium AI voice quality without the premium price tag.
2025 · async.com · its alternatives →
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Make an AI voice chat app in 21 lines of JavaScript
2024 · github.com · its alternatives →
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Retell AI▲300API that helps developers build human-like voice agents
2024 · retellai.com · its alternatives →
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Open Agents▲161OpenAgents - The collaboration OS for AI agents. Contribute to openagents-org/openagents development by creating an account on GitHub.
Apr 2026 · open-agents.dev · its alternatives →
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Bringing the power of Grok Voice to all developers
Dec 2025 · x.ai · its alternatives →
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Voice Agent API▲118One API to build production-ready voice agents
Apr 2026 · assemblyai.com · its alternatives →
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Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →