Gladia
Real-time and async audio transcription API with speaker diarization and 99-language support - free tier includes 600 hours of processing per month.
Gladia is a developer-focused audio AI API that provides high-accuracy speech-to-text transcription for both real-time streaming and asynchronous file processing. It supports 99 languages, speaker diarization to identify individual speakers in a conversation, and audio intelligence features like summarization and named entity extraction. The API is designed for low latency in real-time use cases such as live meeting transcription, call center monitoring, and voice interfaces. Gladia raised a €5.5M seed round in 2022 and offers a generous free tier of 600 hours per month - making it accessible for startups building meeting, podcast, or voice-driven applications. Usage-based pricing applies above the free threshold.
Key Features
- 99-language transcription with automatic language detection for multilingual audio
- Speaker diarization - identifies and labels individual speakers throughout the recording
- Real-time streaming transcription with low-latency WebSocket API for live use cases
- Audio intelligence add-ons: summarization, sentiment analysis, and named entity extraction
- Word-level timestamps for precise search, clipping, and editing workflows
- Free tier: 600 hours per month with usage-based billing at $0.00036/second afterward
Use Cases
- SaaS developers building meeting transcription features into their product without building ML infrastructure
- Call center analytics teams extracting speaker turns and sentiment from recorded support calls
- Podcast platforms adding auto-generated transcripts, chapters, and show notes to episode feeds
- Voice interface developers building real-time voice-to-action pipelines with low-latency streaming
Pros
- Free tier of 600 hours per month is genuinely large enough for small products to serve real users
- Real-time WebSocket API and async file API in one platform cover both latency-sensitive and batch use cases
- Diarization plus summarization in one API call reduces the pipeline complexity for meeting intelligence apps
Cons
- Accuracy on low-quality audio, heavy accents, or highly technical jargon can fall below AssemblyAI or Deepgram
- Audio intelligence add-ons (summarization, entities) are priced separately from base transcription
- Smaller developer community and documentation ecosystem compared to Deepgram or AssemblyAI
Gladia Alternatives
Explore similar tools and alternatives
Looking for alternatives to Gladia? Here are some similar tools you might like:
AssemblyAI
Speech AI API with best-in-class transcription, speaker diarization, sentiment analysis, and LeMUR LLM-over-audio.
Deepgram
Voice AI API with sub-100ms Nova-3 STT, Aura-2 TTS, and a unified Voice Agent API - 1,300+ enterprise customers; $229M raised at $1.3B valuation.
Otter.ai
AI meeting transcription and note-taking tool that records, transcribes, and summarizes conversations in real-time.
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