Compare 10 options for tasks you use AssemblyAI for. Their feature coverage differs; check the summaries and plan details. Production speech AI APIs for transcription and voice agents
| Tool | Pricing | Score | API | Ongoing free tier | Self-hosting |
|---|---|---|---|---|---|
| AssemblyAIthis one Production speech AI APIs for transcription and voice agents | Freemium | 118 | Yes | Unknown | No |
| Speak AI AI transcription and conversation analysis platform | Freemium | 0 | Yes | Unknown | No |
| Voice.ai AI voice agents and audio tools for business and creators | Freemium | 5 | Yes | Unknown | Unknown |
| Cartesia Real-time voice AI for production applications | Freemium | 65 | Yes | Unknown | No |
| Inworld AI Real-time voice AI infrastructure for conversational applications | Contact | 17 | Yes | Unknown | No |
| SpeechEasy AI-powered text-to-speech for voiceovers and audio content | Freemium | 2 | Unknown | Unknown | No |
| Speechtext Convert speech to accurate text with AI in 50+ languages | Paid | 3 | Yes | Unknown | No |
| CassetteAI AI-powered generative audio for music, sound effects, and voice | Paid | 1 | Yes | Unknown | No |
| Amical Voice-to-text dictation with AI smarts across all your apps | Freemium | 3 | Unknown | Unknown | No |
| 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 |
Speak AI automatically captures, transcribes, and analyzes voice, video, and meeting recordings in 100+ languages with speaker identification. It extracts key themes, sentiment patterns, and custom insights from large conversation volumes, while supporting deployment of AI agents for customer interactions and support workflows. Built for research teams, sales operations, healthcare providers, and agencies processing high volumes of call data.
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.
Cartesia provides the core infrastructure for building voice-driven systems—combining speech synthesis, speech recognition, and an agent framework. Built for production workloads, it enables enterprises to deploy voice applications for customer service, fraud detection, and real-time conversations that operate at scale.
Inworld AI is a platform for building voice-enabled conversational experiences at scale. It combines speech synthesis, speech recognition, voice cloning, and LLM orchestration into a unified API, eliminating the need to integrate multiple vendors. Developers can deploy interactive voice agents for customer support, entertainment, language learning, and AI companions.
SpeechEasy converts written text into natural-sounding synthetic audio using advanced AI technology. The platform offers multiple high-quality voice options and runs seamlessly across desktop and mobile devices. It's designed for video creators, educators, and publishers who need professional voiceovers without lengthy recording sessions.
AI-powered transcription platform that converts audio and video into text with high accuracy across 50+ languages. Features speaker identification, domain-specific models for healthcare and legal fields, and interactive editing tools. Used by professionals, researchers, and content creators for interviews, podcasts, meetings, and documentation.
CassetteAI generates high-quality audio on demand—music, sound effects, and voice synthesis—all optimized to run on edge devices. Designed for game developers, creators, and real-time applications, it offers lightning-fast rendering with affordable per-use pricing. Streaming-first API makes integration seamless across JavaScript, Python, and cURL.
Amical is an AI-powered dictation tool that converts speech into perfectly formatted text, adapting tone and style to match each application. It supports over 100 languages and works seamlessly across Mac, Windows, iOS, and Android, integrating with Gmail, Slack, Notion, and dozens of other platforms. Choose between private local AI models for maximum privacy or cloud-based providers like OpenAI for advanced accuracy.
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.