Every option in the catalog for when you need to build a phone agent that listens and answers live — 10 real-time AI voice agent platforms, 10 of them free or freemium, with the pricing tier printed on every row.
Flocci AI Tools lists 10 of them, ordered free tiers first: Bolna, Kyutai Unmute, LiveKit Agents, Pipecat and TEN Framework. Every one of them is free or has a free tier. Each entry states what it uniquely does rather than a score.
6 on this page are marked fully free with no paid plan at all: Bolna, Kyutai Unmute, LiveKit Agents, Pipecat and TEN Framework. The remaining 4 are freemium, trial or paid, and each is labelled with its exact tier so nothing surprises you at sign-up.
Free tools first, then freemium, then trial, then paid, and alphabetically inside each tier. Nobody pays to appear higher: Flocci AI Tools carries no ads, no sponsored slots and no paid listings, so the order reflects price and nothing else.
Bolna, Kyutai Unmute, Bland AI, Retell AI and Ultravox all work in a browser tab with no install needed — just open the site and go. 6 of the 10 free real-time AI voice agent platforms listed here are browser-based.
Retell AI, Ultravox and Vapi support Google sign-in, so you can start without creating a new account. That's 3 of the 10 free real-time AI voice agent platforms on this page.
LiveKit Agents, Pipecat and TEN Framework can be self-hosted or run locally without a browser — useful for privacy, air-gapped networks, or avoiding API rate limits. 3 of the 10 free real-time AI voice agent platforms here run offline.
| Tool | Pricing | Type | Listed for |
|---|---|---|---|
| Bolna | Free | Real-Time Voice Agents | Open-source framework for phone voice agents, from an India-based team |
| Kyutai Unmute | Free | Real-Time Voice Agents | Wraps any text LLM with Kyutai's streaming speech-to-text and text-to-speech for voice conversation |
| LiveKit Agents | Free | Real-Time Voice Agents | Apache-2.0 open-source framework, fully self-hostable on your own servers |
| Pipecat | Free | Real-Time Voice Agents | BSD-2-Clause open-source Python framework for real-time voice/multimodal agents |
| TEN Framework | Free | Real-Time Voice Agents | Open-source framework for real-time conversational voice and multimodal agents |
| XiaoZhi AI | Free | Real-Time Voice Agents | Open-source ESP32 voice chatbot with wake word, Opus streaming and a display |
| Bland AI | Freemium | Real-Time Voice Agents | All-in-one per-minute pricing bundles LLM+STT+TTS with no separate token pass-through charges |
| Retell AI | Freemium | Real-Time Voice Agents | Free starting credit with no contract required |
| Ultravox | Freemium | Real-Time Voice Agents | Speech-native processing skips the STT-to-text bottleneck, preserving tone/cadence/pitch |
| Vapi | Freemium | Real-Time Voice Agents | Orchestrates STT/LLM/TTS providers of choice into one low-latency voice-agent pipeline |