Gladia

What is Gladia?

Gladia is an enterprise-grade AI audio infrastructure platform providing speech-to-text (STT) and native audio intelligence through a unified API. Founded by Jean-Louis Queguiner and Jonathan Topart, Gladia solves the problems of fragmented audio pipelines by combining high-accuracy multilingual transcription, real-time code-switching, and downstream analytical layers into a developer-first, sovereign solution.

Built around the mission to “Turn audio into your most valuable dataset,” Gladia enables engineering teams, startups, and global enterprises to deploy scalable voice solutions without the latency, infrastructure management, or compliance challenges of self-hosted open-source models. Powered by proprietary models including Solaria-1 and Solaria-3, Gladia provides sub-300ms latency for live voice agents, contact center analytics, and AI meeting assistants across more than 100 languages.

• Platform Role: AI Audio Infrastructure, Multilingual Speech-to-Text (STT) Engine & Audio Intelligence API
• Founders & Organization: Jean-Louis Queguiner and Jonathan Topart (Gladia SAS / Gladia Inc.)
• Architecture & SDKs: REST API, WebSocket Streaming, Python SDK, Node.js SDK, and native Pipecat/LiveKit voice agents

Use Cases:

• Powering conversational voice agents and voice bots requiring sub-300ms real-time audio transcription and low-latency interaction
• Transcribing and structuring customer support calls in CCaaS platforms with automated sentiment scoring and CRM sync
• Driving automated AI meeting assistants and note-takers with state-of-the-art speaker diarization (pyannoteAI) and action item summaries
• Generating accurate subtitles and closed captions across 100+ languages for media, video editing, and broadcast platforms
• Processing multilingual calls with mid-sentence code-switching and automated Personally Identifiable Information (PII) redaction

Technology:

• Proprietary Solaria speech model series (Solaria-1 universal STT and Solaria-3 optimized for conversational English and European languages)
• Native audio intelligence engine integrating speaker diarization, sentiment analysis, entity extraction, and audio-to-LLM pipelines
• European Union data sovereignty with 100% EU data residency options and strict zero-data-training retention policies by default
• Full enterprise compliance stack certified under ISO 27001:2022, SOC 2 Type II, HIPAA, and GDPR

Target Users:

• Voice agent developers and engineers building low-latency conversational AI applications and telephony bots
• Product teams building AI meeting assistants, note-takers, and automated collaboration software
• Contact Center as a Service (CCaaS) providers and sales intelligence platforms analyzing customer call streams
• Media platforms, video editors, and broadcasters scaling automated transcription, captioning, and dubbing pipelines

Acquisition: Independent enterprise AI audio infrastructure company headquartered in Paris, France

What are the key features of Gladia?

Gladia's key platform features are

• Sub-300ms Real-Time Streaming: Ultra-low latency WebSocket streaming engineered for live conversational voice agents and responsive telephone systems.
• Native Multilingual Code-Switching: Automatically detects and transcribes over 100 languages, seamlessly handling speakers switching languages mid-sentence without losing accuracy.
• Market-Leading Speaker Diarization: Powered by pyannoteAI integration, it accurately identifies and separates distinct speakers, timestamps, and conversational turns.
• Built-In Audio Intelligence: Provides sentiment analysis, topic detection, summarization, and named entity recognition (NER) natively without secondary LLM hops.
• Automated PII Redaction: Safeguards sensitive customer privacy by automatically redacting names, phone numbers, emails, addresses, and payment data.
• Custom Vocabulary & Jargon Tuning: Ingests domain-specific terms, acronyms, and industry glossaries to avoid miswriting technical language.
• GladiaFlow Desktop Dictation: Zero-code real-time dictation app bringing Gladia's speech intelligence directly to local desktop applications.
• EU Data Sovereignty & Privacy: Guarantees 100% EU data residency with a contractual commitment that user audio is never used for model training.

How much does Gladia cost?

Gladia operates on a usage-based pay-as-you-go model alongside volume discounts and custom enterprise licensing tiers.

Developer & Pay-As-You-Go Tiers:

• Free Credit Welcome: Grants up to €50 in non-expiring free transcription credits for new sign-ups to test asynchronous and real-time APIs in the developer playground.
• Pay-As-You-Go: Usage-based billing per audio hour (typically around $0.00021 per second / approx. $0.75 per audio hour for standard async transcription), including built-in diarization and intelligence features.

Enterprise Tier:

• Custom Enterprise Pricing: Tailored pricing for high-volume deployments with dedicated account management, guaranteed 99.95% uptime SLAs, private cloud/on-premise deployment options, and customized DPA agreements.

Disclaimer: Gladia pricing scales with audio duration and concurrency requirements. Free developer credits are provided upon sign-up; enterprise volume discounts and custom SLAs require direct contact via gladia.io.

Who should use Gladia?

Gladia is designed for developers, engineering teams, and enterprise voice products, including

• Conversational Voice AI Developers: Teams implementing real-time agentic voice bots using frameworks like Pipecat, LiveKit, or Retell.
• Meeting Assistant & Note-Taking Founders: Builders creating collaborative meeting recorders, automated CRM loggers, and enterprise summarizers.
• Contact Center Operations (CCaaS): Telephony platforms (like Aircall) analyzing massive call volumes for quality assurance and compliance monitoring.
• Video & Media Production Platforms: Creators and SaaS platforms (like VEED and Mojo) generating fast, accent-resilient subtitles in multiple languages.

What are the best alternatives to Gladia?

Some of the strongest Gladia alternatives include

• Deepgram
• AssemblyAI
• Speechmatics
• Whisper (OpenAI / Self-Hosted)
• ElevenLabs (Scribe)
• Rev AI

What are the pros and cons of Gladia?

What are the pros of Gladia?

• Native code-switching handles multi-language conversations seamlessly within the same audio stream
• All-in-one API bundles speaker diarization and audio intelligence without costly add-on micro-billing
• Ultra-low latency under 300ms enables natural, human-like responses in conversational voice agents
• Strict EU data privacy guarantees with default zero data retention for training purposes
• Developer-friendly ecosystem with fast setup times, rich documentation, and native voice stack integrations

What are the cons of Gladia?

• Voice-agent infrastructure is developer-oriented, requiring API integration knowledge for custom platforms
• On-premise deployments and custom private cloud setups are reserved exclusively for enterprise agreements
• Real-time telephony setups require reliable WebSocket connections to maintain minimum latency guarantees

Why should you choose Gladia?

Building real-time voice applications often requires piecing together separate vendors for transcription, speaker separation, and conversational intelligence—or struggling with the resource overhead of hosting Whisper models internally. Gladia solves this by providing a sovereign, all-in-one AI audio infrastructure. With out-of-the-box diarization, sub-300ms response times, and superior handling of real-world conversational accents, Gladia ensures your downstream LLMs and CRMs receive clean, structured data every time.

• Accelerate voice agent response loops with sub-300ms streaming speech recognition
• Capture natural conversational shifts with accent resilience and native mid-sentence code-switching
• Eliminate middleware costs by receiving speaker turns, sentiment, and summaries in a single API call
• Ensure strict regulatory compliance with ISO 27001, SOC 2 Type II, and 100% EU data residency

How does Gladia compare to competitors?

The primary distinction between Gladia, Deepgram, AssemblyAI, and Speechmatics lies in Gladia's native multilingual code-switching, integrated audio intelligence, and EU-first compliance posture. While Deepgram emphasizes raw latency and AssemblyAI focuses on post-processing APIs, Gladia bundles advanced pyannoteAI diarization, multi-language streaming across 100+ languages, and default zero-training guarantees without charging extra for core metadata features.

How do we rate Gladia?

What is our review and verdict on Gladia?

Gladia stands out for its fast, accurate speech-to-text and developer-friendly APIs. It’s great for building apps around voice, calls, or media processing without heavy setup. The real-time transcription is impressive, and language support keeps improving. Pricing and advanced customization may need closer evaluation, but overall it’s a solid choice for teams working with audio AI at scale.

Conclusion

Gladia makes working with audio data feel fast, structured, and developer-friendly by turning speech into usable insights in real time. Its APIs handle transcription, speaker recognition, and language processing with strong accuracy, making it a solid fit for apps that rely on voice data. Instead of building complex pipelines from scratch, teams can plug in and scale quickly. Overall, Gladia simplifies audio intelligence and helps businesses unlock more value from conversations with less effort.