Compare 12 options for tasks you use AVA for. Their feature coverage differs; check the summaries and plan details. Open-source AI voice agent for Asterisk phone systems
| Tool | Pricing | Score | API | Ongoing free tier | Self-hosting |
|---|---|---|---|---|---|
| AVAthis one Open-source AI voice agent for Asterisk phone systems | Free | 7 | Yes | Yes | Yes |
| Voice.ai AI voice agents and audio tools for business and creators | Freemium | 5 | Yes | Unknown | Unknown |
| Vapi Voice AI agents for enterprise customer conversations | Contact | 78 | Yes | No | No |
| Retell AI Build AI voice agents for phone conversations | Freemium | 74 | Yes | Yes | Yes |
| OneAI AI phone agent platform for automated sales and customer service | Contact | 1 | Yes | Unknown | No |
| AiCogni Voice AI assistant for Android phones and smartwatches | Freemium | 9 | No | Unknown | No |
| Simple Phones AI voice agent handles your business calls 24/7 | Freemium | 1 | Yes | No | No |
| AiryChat AI-powered assistants for document analysis, web search, and voice interactions | Freemium | 3 | Unknown | Unknown | No |
| Mistral AI European frontier models and autonomous agents for developers | Freemium | 176 | Yes | Unknown | No |
| Tiledesk Build and deploy AI agents across channels without code | Freemium | 11 | Unknown | Unknown | Unknown |
| AskAI Multi-specialist AI platform with instant access to 9 expert assistants | Freemium | 6 | Unknown | Yes | No |
| Deepgram Enterprise voice AI unifying speech-to-text, text-to-speech, and agents | Freemium | 118 | Yes | Unknown | No |
| AI Coustics Clean audio for smarter voice AI systems | Freemium | 9 | 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.
Vapi is an AI voice agent platform that automates customer support, sales, and appointment scheduling at enterprise scale. Built with integrations to leading AI models like OpenAI and Anthropic, and business tools like Salesforce and HubSpot, it handles high-volume conversations with real-time monitoring and compliance controls.
Retell automates inbound and outbound phone conversations with AI agents that sound natural and human-like. Handle appointment booking, customer service, lead qualification, and more. Deploy on Twilio or Vonage infrastructure, or on your own servers for enterprise security.
OneAI automates phone-based business communications with AI agents that handle outbound prospecting, inbound support, and meeting scheduling at scale. The platform integrates with major CRMs to qualify leads, warm-transfer prospects to sales teams, and optimize calling campaigns through continuous testing. Built for sales teams and contact centers seeking improved efficiency and lead contact rates.
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.
Simple Phones deploys a customized AI voice agent to manage inbound and outbound business calls. The agent answers calls, routes to your team, and learns continuously from interactions. Eliminate phone tag and routine call handling with natural voice automation that scales automatically.
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.
Mistral develops frontier large language models and autonomous agents running on-premise or in the cloud. The Le Chat platform provides direct model access with image generation and code execution, while Vibe automates complex multi-step tasks with organizational knowledge integration. EU-based infrastructure and multi-cloud deployment options support privacy-conscious workloads.
Tiledesk is an AI agent operating system that lets you automate customer interactions, lead qualification, and internal workflows through visual design. Deploy across web, WhatsApp, voice, SMS, email, and messenger without writing code. It combines conversational AI with human escalation, knowledge base retrieval, and appointment scheduling into a single platform.
AskAI combines multiple AI specialists (lawyer, accountant, nutritionist, etc.) with tools for writing, coding, image generation, and video creation. It integrates several language models—Claude, ChatGPT, Gemini, DeepSeek—through one interface. Free access with daily limits; Pro plan at $14.99/month offers unlimited conversations.
Deepgram provides unified APIs for building voice-powered applications without integrating separate speech services. It handles real-time and batch transcription, natural speech synthesis, and AI-driven conversational agents across 10 languages. Trusted by enterprises including Twilio, Cloudflare, and IBM for contact center automation, podcast processing, and voice analytics.
AI Coustics is an audio processing platform that improves voice AI accuracy by cleaning and enhancing incoming audio before it reaches speech recognition models. It offers speech enhancement, voice activity detection, and speaker isolation tools, all optimized for low-latency production environments. Used by voice agent developers across 187 countries.