Compare 12 options for tasks you use Open Voice OS for. Their feature coverage differs; check the summaries and plan details. Open-source platform for building custom voice assistants
| Tool | Pricing | Score | API | Ongoing free tier | Self-hosting |
|---|---|---|---|---|---|
| Open Voice OSthis one Open-source platform for building custom voice assistants | Free | 7 | Yes | Yes | Yes |
| Voice.ai AI voice agents and audio tools for business and creators | Freemium | 5 | Yes | Unknown | Unknown |
| Vicuna Open-source chatbot rivaling ChatGPT quality | Free | 0 | Yes | Yes | Yes |
| Oxolo AI voice assistant for construction site documentation | Paid | 3 | Unknown | Unknown | No |
| Whisper OpenAI's multilingual speech recognition and translation model | Free | 228 | Yes | Yes | Yes |
| OpenScience Autonomous AI research workbench for scientific discovery | Free | 4 | Unknown | Yes | Yes |
| OpenArt Unified AI studio for images, videos, and interactive content | Freemium | 84 | Unknown | Yes | No |
| BillAI Bass Turn Big Mouth Billy Bass into an interactive AI voice assistant | Free | 1 | Yes | Yes | Yes |
| AVA Open-source AI voice agent for Asterisk phone systems | Free | 7 | Yes | Yes | Yes |
| AiryChat AI-powered assistants for document analysis, web search, and voice interactions | Freemium | 3 | Unknown | Unknown | No |
| OpenClaw Personal AI assistant that runs locally on your machine | Free | 88 | Yes | Yes | Yes |
| AiCogni Voice AI assistant for Android phones and smartwatches | Freemium | 9 | No | Unknown | No |
| Zenen Voice AI assistant that talks like a friend, with broad knowledge and creative thinking | Freemium | 2 | Unknown | Unknown | No |
Voice.ai is a platform for creating AI-powered voice agents that automate customer calls, combined with text-to-speech, voice cloning, and voice-changing capabilities. Designed for businesses automating support interactions and content creators producing audio content. The platform supports 15+ languages with enterprise-grade security including GDPR and HIPAA compliance.
Vicuna is a free, open-source conversational AI model developed by LMSYS, fine-tuned on 125K shared conversations to achieve competitive performance with commercial chatbots. It runs efficiently on consumer hardware including GPUs, CPUs, and Mac computers, making advanced AI accessible to researchers and developers. Available in multiple sizes from 7B to 33B parameters with extended context support.
Oxolo turns on-site voice notes into automated construction documentation. It captures speech, generates transcripts, extracts action items, and populates custom templates—all in the field. Built for construction teams that need faster, hands-free documentation workflows.
Whisper is a free, open-source speech recognition model that transcribes audio across 99 languages and translates spoken content into English. It handles noisy audio gracefully and comes in six sizes optimized for different accuracy-speed tradeoffs. Developers can run it locally or integrate it into applications via Python APIs and command-line tools.
OpenScience is an open-source AI-powered platform that automates the research process—from literature review through hypothesis generation, code execution, and experiment running. It integrates with scientific databases like UniProt and PubChem, and supports models from Anthropic, OpenAI, Google, and others. Researchers can define a research goal and let the system autonomously conduct investigations and summarize findings.
OpenArt is an AI-powered creative platform that transforms text prompts into professional-quality images, videos, audio, and interactive 3D environments. It integrates multiple cutting-edge AI models and provides intuitive tools for character consistency, scene composition, and multi-step storytelling. Perfect for creators, marketers, and studios looking to produce content at scale without specialized technical skills.
Transform a Big Mouth Billy Bass toy into an interactive AI voice assistant using Raspberry Pi 5 and Amazon Nova 2 Sonic. The fish listens to user speech, responds conversationally, and syncs its mouth movements to speech while the head and tail animate. An open-source project for makers and hardware enthusiasts.
AVA brings AI-powered voice automation to Asterisk and FreePBX, letting businesses handle inbound calls with natural language conversations. Deploy with your choice of speech-to-text and AI providers, or run everything locally on your infrastructure for complete privacy. Designed for telecom engineers and system administrators who need flexible, vendor-independent voice agents.
AiryChat is an AI augmentation platform that extends your team's capabilities through conversational AI. Built on OpenAI, Meta, and Google services, it processes documents, performs web research, generates images, and supports voice-based interactions with specialized assistant personas for different workflows.
OpenClaw is a free, open-source AI assistant that runs entirely on your machine. It connects to your favorite chat apps—WhatsApp, Slack, Telegram, Discord, and 20+ others—and can read files, browse the web, and execute commands. Built for Claude, GPT, and local models, it remembers your preferences across conversations and handles everything from email triage to autonomous background tasks.
A hands-free AI assistant powered by ChatGPT that responds to voice commands on Android devices and WearOS smartwatches. Offers writing assistance, real-time translation, and information retrieval without requiring touch interaction. Uses a credit-based pricing model for affordable, flexible access.
Zenen is a conversational AI available on iOS that lets you speak naturally to an intelligent assistant. It excels at brainstorming, storytelling, content creation, and answering questions across history, literature, and general knowledge. The tool openly acknowledges its limitations, framing creative imagination as a feature for ideation rather than strict factual accuracy.