ThinnestAI is Now Backed by the AssemblyAI Startup Program

World-Class Speech AI to Build Better Voice Agents for India

We are excited to announce that Thinnest AI is now backed by the AssemblyAI Startup Program — gaining access to the most accurate speech-to-text models in the world to power the next generation of voice AI agents for Indian businesses.

AssemblyAI builds the most accurate speech-to-text models in the world. Their Universal-3 Pro model is purpose-built for production applications where accuracy matters — and for India’s diverse linguistic landscape, that accuracy is transformative.

Why AssemblyAI for India?

India’s voice AI challenge is unique. Every call involves accents from different regions, code-mixing between Hindi and English (and Tamil and English, and Telugu and English), noisy mobile connections, and telephony-grade 8kHz audio. Most global STT models struggle with this reality. AssemblyAI’s Universal-3 Pro excels at it.

Universal-3 Pro: Built for Real-World Speech

AssemblyAI’s Universal-3 Pro model delivers industry-leading accuracy across the exact conditions our voice agents operate in:

• Indian Accent Excellence: Trained on diverse global accents including Indian English variants — from South Indian to North Indian, urban to rural
• Code-Mixed Speech: Handles natural Hinglish (Hindi-English), Tanglish (Tamil-English), and other code-mixed conversations that dominate Indian business calls
• Telephony Optimization: Purpose-built for 8kHz telephony audio with background noise, compression artifacts, and variable connection quality
• Real-Time Streaming: Low-latency streaming transcription for live voice agent conversations with instant partial results

Beyond Transcription: Intelligence Built In

Universal-3 Pro is not just an STT model — it is a complete speech understanding platform. Every transcription comes with built-in intelligence:

• Speaker Diarization: Automatically identify and separate speakers in multi-party calls — essential for customer support analytics
• Sentiment Analysis: Detect customer sentiment in real-time to trigger escalations, adjust agent behavior, or flag at-risk conversations
• PII Redaction: Automatically detect and redact sensitive information (phone numbers, Aadhaar numbers, credit card details) for DPDPA 2023 compliance
• Topic Detection: Understand what the conversation is about for routing, categorization, and analytics
• Custom Vocabulary: Boost recognition of domain-specific terms — product names, medical terms, legal jargon, financial instruments

What This Means for Our Users

The AssemblyAI Startup Program directly improves transcription quality for every Thinnest AI voice agent:

• Higher accuracy: Universal-3 Pro delivers best-in-class word error rates on Indian English and code-mixed speech
• Better conversations: More accurate transcription means fewer misunderstandings, fewer “I didn’t catch that” moments, and more productive calls
• Compliance ready: Built-in PII redaction for DPDPA 2023, RBI data protection, and enterprise security requirements
• Richer analytics: Sentiment, topics, and speaker separation provide actionable insights from every conversation
• Enterprise scale: Generous credits mean we can serve high-volume use cases — call centers, sales teams, and customer support operations — without compromise

Building for Bharat’s Voice-First Future

India has over 500 million voice-first users who prefer speaking over typing. Business communication happens in a beautiful chaos of languages — a sales call might start in English, switch to Hindi for rapport, throw in Marathi for emphasis, and close in English again. AssemblyAI’s Universal-3 Pro handles this reality with grace.

Combined with our existing voice AI stack:

• Vega STT for ultra-low-latency Indian language recognition (~100ms)
• Cartesia Sonic-2 for expressive, natural-sounding TTS
• Deepgram Nova-3 for real-time turn detection
• 300+ LLM models for intelligent conversation handling

AssemblyAI adds another world-class engine to our multi-model architecture — letting us route each call to the best STT model for the language, accent, and audio conditions.

The Program

AssemblyAI's Startup Program provides generous transcription credits, dedicated technical support, and access to their full model suite — enabling startups like us to build production-grade speech AI without worrying about costs during the critical early scaling phase.

Try It Yourself

Experience AssemblyAI-powered voice agents on Thinnest AI — try our live demo and hear the difference best-in-class transcription makes for Indian accents and code-mixed speech.

Or sign up for free and build your own voice agent in minutes:

Start Building Free →

25 free voice minutes • 200 chat messages • No credit card required

Thank You, AssemblyAI

We are grateful to the AssemblyAI team for believing in our mission. Being backed by the company that builds the most accurate STT models in the world is a massive vote of confidence. This partnership will help us deliver voice agents that truly understand every Indian voice.

— The Thinnest AI Team