Open Voice OS alternatives

These 12 tools sit in the same categories as Open Voice OS and are ranked by community score. Open-source platform for building custom voice assistants.

Tool	Pricing	Score	Categories
Open Voice OSthis one Open-source platform for building custom voice assistants	Free	7	Audio & Voice, Chatbots
Whisper OpenAI's multilingual speech recognition and translation model	Free	228	Audio & Voice, Coding
Doubao ByteDance's all-in-one AI assistant for chat, content, and tasks	Free	190	Chatbots, Productivity
OpenRouter Access 400+ AI models from a single API gateway	Freemium	177	Coding, Chatbots
ChatGPT OpenAI’s conversational assistant for everyday tasks.	Freemium	381	AI Writing, Chatbots
DeepSeek Open-weight frontier models, free to chat.	Free	262	Coding, Chatbots
Deepgram Enterprise voice AI unifying speech-to-text, text-to-speech, and agents	Freemium	118	Audio & Voice, Chatbots
Vapi Voice AI agents for enterprise customer conversations	Contact	78	Chatbots, Productivity
Haystack Open-source AI orchestration framework for agents and RAG	Freemium	77	Coding, Productivity