Voice Agents Python Packages

onepin

Onepin Python SDK + CLI — orchestrate, validate & ship production-ready voice audio across 100+ TTS models

unpod

SDK to use unpod's calling infra and speech pipeline

attenlabs-saa

Addressee detection for voice agents: device-directed speech detection that runs before STT, so background speech, side conversations, and the agent's own TTS echo never trigger it. No wake word, model-agnostic, drop-in for LiveKit, Pipecat, ElevenLabs, Twilio, and OpenAI. The layer your VAD and turn detection are missing.

dograh-sdk

Open source voice AI platform. Self-hosted alternative to Vapi and Retell. On Prem, BYOK across Speech to Speech or LLM/STT/TTS, with a visual workflow builder, MCP native and telephony support.

neurosym-ai

Neuro-symbolic guardrails for LLMs — injection detection, harm filters, output guards, streaming safety, and action-plan validation.

saa-livekit-client

Addressee detection for voice agents: device-directed speech detection that runs before STT, so background speech, side conversations, and the agent's own TTS echo never trigger it. No wake word, model-agnostic, drop-in for LiveKit, Pipecat, ElevenLabs, Twilio, and OpenAI. The layer your VAD and turn detection are missing.

provedex

Cryptographic evidence layer for AI agents. Ed25519-signed, SHA-256-chained audit logs anyone can verify offline.

saa-pipecat-client

Addressee detection for voice agents: device-directed speech detection that runs before STT, so background speech, side conversations, and the agent's own TTS echo never trigger it. No wake word, model-agnostic, drop-in for LiveKit, Pipecat, ElevenLabs, Twilio, and OpenAI. The layer your VAD and turn detection are missing.

spekoai

Official Speko Python SDK (spekoai) - one API for every voice AI provider: STT, TTS, and LLM routing + failover, sync + async

voice-agents

Voice-Agents is a production-ready Python library for building enterprise-grade voice-enabled AI applications. Built by Swarms Corporation, it provides seamless integration with multiple TTS/STT providers including OpenAI, ElevenLabs, and Groq, with real-time streaming capabilities optimized for agent-based architectures.

call2me

Official Call2Me Python SDK — Build AI voice agents in minutes

vent-livekit

CLI for coding agents to call, evaluate, and fix voice agents autonomously. Works with Vapi, Retell, LiveKit, ElevenLabs, Bland, and custom endpoints.

telnyx-agent-toolkit

Official one-stop shop for AI Agents and developers building with Telnyx.

provedex-pipecat

Cryptographic evidence layer for AI agents. Ed25519-signed, SHA-256-chained audit logs anyone can verify offline.

vapiserve

A framework for building API servers for Vapi custom tools with integrated service providers

provedex-langchain

LangChain BaseCallbackHandler that signs every LLM and tool callback via the Provedex sidecar. Covers LangGraph by inheritance.

voiceeval

VoiceEval: World-Class Open-source Voice AI Testing Framework