Free AI voice agents (2026)
AI voice agents that you can use without paying: open-source projects plus tools with a free plan. Here are the top 25 of 49 from the AgentScout directory.
How we picked and ranked: tools are matched by category, the pricing each maker states and what each tool says it does. They are ranked by GitHub stars as recorded on each listing (link checks 2026-10-18); tools without a tracked repo follow, by listing maturity. No paid placements.
1. Ollama
Runs open models such as Qwen, Gemma, DeepSeek and gpt-oss locally or in Ollama's cloud, and connects them to agents like Claude Code, OpenClaw and Codex.
Pricing (as stated): Open source · Mature
2. Langflow
Visual drag-and-drop builder for AI agents and workflows that you can run locally, deploy as an API or expose as an MCP server.
Pricing (as stated): Open source + cloud · Mature
3. Headroom
Library, proxy and MCP server that compresses tool outputs, logs, files and RAG chunks locally before they reach the LLM, cutting tokens for coding agents.
Pricing (as stated): Open source · Mature
4. LiteLLM
Open-source AI gateway and Python SDK that calls 100+ LLM providers in the OpenAI format, with cost tracking, guardrails, load balancing and logging.
Pricing (as stated): Open source + cloud · Mature
5. MemPalace
Local-first AI memory system that stores conversations verbatim with a pluggable backend and serves recall to agents without API calls.
Pricing (as stated): Open source · Mature
6. LocalAI
Self-hosted engine with an OpenAI-compatible API for running LLM, vision, voice and image models on your own hardware, including agents.
Pricing (as stated): Open source · Mature
7. QwenPaw
Personal AI assistant you can install locally or in the cloud, connected to multiple chat channels.
Pricing (as stated): Open source · Mature
8. XiaoZhi ESP32
Open-source voice chatbot firmware for ESP32 devices that talks through LLMs like Qwen and DeepSeek and controls hardware and services via MCP.
Pricing (as stated): Open source · Mature
9. FunASR
ModelScope's speech recognition toolkit for offline, streaming and edge ASR, with VAD, punctuation, speaker diarization and OpenAI-compatible/MCP serving.
Pricing (as stated): Open source · Mature
10. Pipecat
Open-source framework for voice and multimodal conversational agents.
Pricing (as stated): Open source · Mature
11. Eigent
Open-source cowork desktop app that runs multi-agent workflows locally.
Pricing (as stated): Open source · Mature
12. BrowserOS
Open-source agentic browser that runs AI agents locally.
Pricing (as stated): Open source · Mature
13. Bindu
Identity, communication and payments layer that lets AI agents talk to and pay each other.
Pricing (as stated): Open source · Mature
14. Oh My OpenCode Slim
Lean multi-agent suite for OpenCode that mixes models and delegates tasks automatically.
Pricing (as stated): Open source · Mature
15. Vision Agents
Stream's open framework for building real-time voice and video agents with any model.
Pricing (as stated): Open source · Mature
16. Repowise
Codebase intelligence tool that indexes code, call graph, git history and docs locally and answers questions for you and your coding agent over MCP.
Pricing (as stated): Open source · Mature
17. Superagent
SDK for AI agent safety that blocks prompt injections and unsafe tool calls, redacts PII and secrets, and runs red-team scenarios.
Pricing (as stated): Open source · Mature
18. Dograh
Self-hostable voice agent platform with a visual call-flow builder, bring-your-own speech and LLM providers and MCP control, pitched as an open alternative to Vapi and Retell.
Pricing (as stated): Open source + cloud · Mature
19. coucou
Mac notch and phone companion that monitors your Claude Code, Codex, Cursor and Gemini CLI sessions and lets you approve permissions on the go.
Pricing (as stated): Open source · Mature
20. MCPorter
TypeScript runtime and CLI for discovering and calling MCP servers from scripts, terminals and agents, or packaging them as standalone CLIs.
Pricing (as stated): Open source · Mature
21. ACI.dev
Open-source tool-calling platform connecting hundreds of tools to agents.
Pricing (as stated): Open source + cloud · Active
22. Kiro Crew
Kiro's open-source, persistent development workspace that runs unattended and recurring coding tasks locally or on your own hardware.
Pricing (as stated): Open source · Active
23. vocode
Open-source library for building voice-based LLM agents for phone calls and apps.
Pricing (as stated): Open source + cloud · Active
24. EvoAgentX
Framework for building, evaluating and automatically evolving LLM agents and agentic workflows.
Pricing (as stated): Open source · Active
25. Zeron
Native control plane for running and monitoring Claude Code, Codex, Cursor, Devin and other coding agents locally.
Pricing (as stated): Open source · Active
FAQ
What are the best free AI voice agents?
Ranked by tracked GitHub stars, the top free AI voice agents in our directory are Ollama, Langflow, Headroom, LiteLLM, MemPalace. Stars measure popularity, not fit, so compare a few against your own task.
How many free AI voice agents does AgentScout list?
49 tools match. This page shows the top 25. Pricing mix on this page: Open source (20), Open source + cloud (5).
Are these tools really free?
Pricing is what each maker states on their site. Open-source tools are free to self-host but may need a paid model API key or offer paid cloud plans; freemium tools have a free plan with limits. Check each official site.
Where can I see every tool for building voice agents?
Our task page lists all 85 tools we match to building voice agents.
Related: All tools for building voice agents · voice (17) · MCP & infra (11) · coding (7) · personal agents (4)
Similar searches: Open-source voice AI agent frameworks
By role: For game developers
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Facts come from our directory listings; pricing is as each maker states it and can change. Check official sites before you choose.