Real-Time Voice Agentsfree

TEN Framework

Open-source framework for real-time conversational voice and multimodal agents

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What TEN Framework does

  • Open-source framework for real-time conversational voice and multimodal agents
  • Modular graph of extensions in Python, Go, C++ and Node
  • Ships a playground and a VAD and turn-detection model
  • Free to self-host under an open license

TEN Framework — straight answers

What is TEN Framework?

TEN Framework is listed under Real-Time Voice Agents, in the AI Agents & Automation category on Flocci AI Tools. Open-source framework for real-time conversational voice and multimodal agents. It is free, with no paid plan attached, and it lives at theten.ai.

Is TEN Framework free?

TEN Framework is listed as fully free — there is no paid tier attached to it in the catalog. That makes it one of the 397 entries on Flocci AI Tools with no upgrade path built in.

Can I use TEN Framework in a browser, or is there an app?

TEN Framework needs to be installed or self-hosted — it doesn't run in a browser tab. It is available on self-hosting and an API.

What can TEN Framework do?

TEN Framework does 4 things the catalog singles out: Open-source framework for real-time conversational voice and multimodal agents; modular graph of extensions in python, go, c++ and node; ships a playground and a vad and turn-detection model; free to self-host under an open license.

What is the best free alternative to TEN Framework?

Bolna is the closest free alternative: it sits in the same Real-Time Voice Agents sub-category and is free. Kyutai Unmute, LiveKit Agents and Pipecat also start free. The full list is on the alternatives page.

See the full list →

TEN Framework alternatives

Compare all alternatives →

Vapi

Real-Time Voice Agents
freemium
  • Orchestrates STT/LLM/TTS providers of choice into one low-latency voice-agent pipeline
  • Usage-based per-minute pricing with free trial minutes included
  • SOC 2/HIPAA/PCI compliance add-ons for regulated call-center deployments
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Retell AI

Real-Time Voice Agents
freemium
  • Free starting credit with no contract required
  • Supports swapping GPT, Claude or Gemini as the reasoning layer per agent
  • Batch calling campaigns plus live AI-to-human call transfer built in
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Bland AI

Real-Time Voice Agents
freemium
  • All-in-one per-minute pricing bundles LLM+STT+TTS with no separate token pass-through charges
  • Free start with call credits plus an inbound number included
  • Tiered platform fees (Build/Scale) unlock lower per-minute rates for high volume
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LiveKit Agents

Real-Time Voice Agents
free
  • Apache-2.0 open-source framework, fully self-hostable on your own servers
  • Native WebRTC client support across web/mobile/telephony out of the box
  • Native Model Context Protocol (MCP) support for tool-using voice agents
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Pipecat

Real-Time Voice Agents
free
  • BSD-2-Clause open-source Python framework for real-time voice/multimodal agents
  • Supports distributed multi-agent systems with handoffs over a shared bus
  • Maintained by Daily with an active plugin ecosystem for STT/LLM/TTS providers
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Ultravox

Real-Time Voice Agents
freemium
  • Speech-native processing skips the STT-to-text bottleneck, preserving tone/cadence/pitch
  • Free tier: 5¢/min including TTS for up to 5 concurrent calls
  • Open-weight models (fixie-ai) published on Hugging Face for research use
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Head-to-head comparisons

TEN Framework vs VapiTEN Framework vs Retell AITEN Framework vs Bland AITEN Framework vs LiveKit AgentsTEN Framework vs PipecatTEN Framework vs Ultravox