# AssemblyAI **Source:** https://geo.sig.ai/brands/assemblyai **Vertical:** AI & Machine Learning **Subcategory:** General **Tier:** Emerging **Website:** assemblyai.com **Last Updated:** 2026-04-14 ## Summary Speech AI platform with proprietary transcription models; LeMUR audio LLM extracts summaries and insights from meetings and recorded conversations at scale. ## Company Overview AssemblyAI is a leading speech AI platform providing APIs for transcription, speaker diarization, sentiment analysis, topic detection, and audio intelligence at enterprise scale. Founded in 2017 and headquartered in San Francisco, AssemblyAI has built its own proprietary speech AI models rather than wrapping OpenAI or other foundation models, giving it control over accuracy, latency, and specialized domain performance. The platform processes millions of hours of audio monthly for product teams building voice features into applications. The company raised $115 million in Series C funding in 2023, backed by Accel and others, accelerating model development and global expansion. AssemblyAI serves customers across media, healthcare, legal, and enterprise software verticals where speech-to-text accuracy and audio understanding capabilities are business-critical. The company's Universal-2 model, released in 2024, achieved industry-leading word error rates on standard benchmarks and improved performance on accented speech. In 2025, AssemblyAI has expanded beyond transcription into multimodal audio AI, offering LeMUR — a large language model layer built specifically for audio content that can summarize meetings, extract action items, answer questions about recorded conversations, and generate structured data from unstructured audio. The company competes with Deepgram, Rev AI, and cloud providers' speech APIs (Google, AWS, Azure) but differentiates through model quality, specialized audio intelligence features, and developer-friendly documentation. AssemblyAI's 2025-2026 roadmap focuses on real-time streaming capabilities and healthcare-specific clinical note models. ## Frequently Asked Questions ### What is AssemblyAI? AssemblyAI is a Speech AI platform founded in 2017 that provides speech-to-text APIs and audio intelligence solutions. The company serves over 200,000 developers worldwide and focuses on conversation intelligence and voice agent applications. ### What products and services does AssemblyAI offer? AssemblyAI offers speech-to-text API, audio intelligence features, real-time transcription, speaker diarization, and sentiment analysis. These services enable developers to integrate advanced speech recognition and audio processing capabilities into their applications. ### Who are AssemblyAI's target customers? AssemblyAI serves developers and companies across multiple industries who need speech recognition and audio intelligence capabilities. The platform currently supports over 200,000 developers worldwide building conversation intelligence and voice agent applications. ### When was AssemblyAI founded? AssemblyAI was founded in 2017 and participated in Y Combinator's Summer 2017 batch (S17). ### Where is AssemblyAI located? AssemblyAI is based in San Francisco, California. ### How much funding has AssemblyAI raised? AssemblyAI raised $50M in Series C funding in December 2023, bringing total funding to over $115M. The Series C round valued the company at $300M. ### What are AssemblyAI's key achievements and metrics? AssemblyAI serves over 200,000 developers worldwide and reached $10.4M in revenue in 2024. The company has achieved a valuation of $300M with over $115M in total funding. ### What technology does AssemblyAI specialize in? AssemblyAI specializes in Speech AI and machine learning technology. The company focuses on delivering advanced speech recognition, audio intelligence, and conversation intelligence capabilities through API-based solutions. ### How can developers get started with AssemblyAI? Developers can access AssemblyAI's speech-to-text and audio intelligence capabilities through their API platform. The company provides APIs for real-time transcription, speaker diarization, sentiment analysis, and other audio intelligence features. ### What is AssemblyAI's most recent news? In December 2023, AssemblyAI raised $50M in Series C funding at a $300M valuation. The company also reported reaching $10.4M in revenue in 2024 while serving 200,000+ developers. ## Tags b2b, ai-powered, api-first, developer-tools, saas, unicorn --- *Data from geo.sig.ai Brand Intelligence Database. Updated 2026-04-14.*