Every option in the catalog for when you need to build a phone agent that listens and answers live — 6 real-time AI voice agent platforms, 6 of them free or freemium, with the pricing tier printed on every row.
Flocci AI Tools lists 6 of them, ordered free tiers first: LiveKit Agents, Pipecat, Bland AI, Retell AI and Ultravox. Every one of them is free or has a free tier. Each entry states what it uniquely does rather than a score.
2 on this page are marked fully free with no paid plan at all: LiveKit Agents and Pipecat. 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.
| Tool | Pricing | Type | Listed for |
|---|---|---|---|
| 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 |
| 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 |