AI Startup Intelligence

AI Voice Agent Startups

Explore voice and speech AI startups building voice agents, transcription, speech generation, telephony infrastructure, and conversational interfaces.

Companies tracked: 98Key segments: voice agents, speech generation, transcriptionUpdated: September 4, 2026

Voice AI Market Snapshot

tracked companies

visible location clusters

funding signals surfaced

Voice AI is moving from standalone speech models toward full-stack agent infrastructure for calls, support, sales, and operations.

Representative Companies

A crawler-visible sample of companies from the AI Market Watch database.

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Company	Location	Funding	Focus
Aqua Voice Founded 2023	San Francisco	Not disclosed	YC-backed startup providing fast, accurate, and private frontier voice input as an AI layer to write and prompt into any application.
Klang Founded 2022	Helsingborg, Sweden	~SEK 8M (~€720K / ~$780K)	European AI platform that transcribes, summarizes, and analyzes conversations for professional use cases.
Cartesia Founded 2023	San Francisco, USA	$191M	A real-time multimodal AI company developing ultra-low latency generative voice models powered by novel State Space Model (SSM) architectures.
Hi Auto Founded 2019	Tel Aviv, Israel	$23M total ($15M Series A + $4.5M Seed + $3.5M additional; plus $4M credit line)	Hi Auto automates drive-thru order-taking with AI-powered voice technology for quick-service restaurants.
SuperBryn Founded 2025	Bengaluru, India	$1.2M	A reliability, evaluation, and observability platform for enterprise voice AI agents that enables companies to move from pilot to production with high accuracy and low latency.
Gradium Founded 2025	Paris, France	$100M	Gradium develops audio language models (ALMs) that enable ultra-low latency, realistic voice AI interactions at scale
VoAgents Founded 2024	Toronto, Canada	$0	Managed omnichannel AI platform that captures leads from ads, engages via WhatsApp and ~300ms voice agents, and books deals into CRM—live in days.
Neosapience Founded 2017	Seoul, South Korea	$29M	Korean AI startup behind Typecast, an emotionally expressive AI voice, avatar, and conversational-agent platform.
Uplift AI Founded 2024	San Francisco, USA	$3.5M	A voice-first AI platform developing foundational speech models for regional languages to provide digital access to non-literate populations in emerging markets.
Subtle Computing Founded 2023	Palo Alto, USA	$6.0M	An AI-powered hardware and software company developing 'Voicebuds,' next-generation earbuds that utilize on-device AI to isolate human speech from background noise rather than just blocking all sound.
NamiTech Founded 2022	Ho Chi Minh City, Vietnam	$6.0M	A conversational AI startup specializing in noise-robust voice technology and speech processing solutions for enterprise and individual productivity.
Medicall Founded 2025	Seoul, South Korea	$150K	South Korean startup building DentalCall, an AI voice agent platform that automates phone reception, appointment scheduling, patient recalls, and patient management for dental clinics.
PeachWiz Founded 2010	Cumming, USA	Undisclosed	An AI-powered technology incubator and platform provider specializing in interactive enterprise audiobooks and human-AI synergy solutions that transform static content into engaging knowledge ecosystems.
Flai Founded 2025	San Francisco, USA	$6.0M	An AI-powered conversational platform that provides human-like voice assistants specifically tailored to automate phone calls, SMS, and emails for automotive dealerships.
telli technologies GmbH Founded 2024	Berlin, Germany	$18.5 Million	AI voice agents designed to automate B2C sales outreach and customer service calls, handling tasks such as lead qualification, appointment booking, callbacks, and product suggestions.
Contented Founded 2023	Christchurch, New Zealand	NZD $4.1M	An AI-powered platform that transforms workplace conversations and unstructured audio into structured business documentation, actionable insights, and scalable intellectual assets.
Ringg AI Founded 2023	Bengaluru, India	$6.64M	A no-code, multilingual multichannel AI agent platform that lets enterprises deploy production-grade agents across voice, chat, WhatsApp, and web for complex real-time conversations in 20+ languages.
Hume Founded 2021	New York, USA	~$74M–$80M (Seed + $12.7M Series A + $50M Series B; additional ~$17.8M 2025 extension reported)	Voice AI research company providing the data and evaluation layer for emotionally intelligent voice AI (expression measurement, human feedback, simulation/eval), plus empathic speech APIs (EVI/Octave).
Subtle Founded 2023	Palo Alto, USA	$6.0M	A voice-first technology company developing specialized hardware and AI models designed for private, high-accuracy voice interaction and whisper-level dictation in any environment.
Synthio Labs Founded 2024	San Francisco, United States	$5.5 million	Synthio Labs is a clinical-grade voice AI company building AI agents for life sciences customer engagement, focusing on automating compliance-driven interactions and enhancing patient engagement.