Radar · Speech and Voice Recognition in California
Best Speech and Voice Recognition Companies in California, United States
The 134 best Speech and Voice Recognition companies in California, United States in 2026, ranked by funding and momentum. Funding, investors, founders, valuation, tech stack and live signals. Top: Sesame.
By Riya SenguptaFinancials
134companies tracked
$2.5Bdisclosed funding
2unicorns
69have raised
Ranked: Best Speech and Voice Recognition companies in California
| # | Company | Disclosed funding | Last round | Employees | Founded | Founder | Patents & IP focus | Recent signals |
|---|---|---|---|---|---|---|---|---|
| 1 | Sesame Developer of voice-based artificial intelligence companions and lightweight eyewear products 82Funding top 18%AI top 28%Talent top 28%Patents top 34% All 8 signals ▾Fundingtop 18% AItop 28% Talenttop 28% Patentstop 34% Innovationtop 36% Techtop 41% Growthtop 45% Globaltop 48% Funding: Raised $250M across 1 rounds · 1 rounds over 1 yrs (1.0/yr) AI: Holds AI/ML patents (G06N-family CPC) · Product described with: artificial intelligence rank vs industry peers · Fliar Intelligence Index 82/100 | $250M | 8 mo ago | — | 2023 | Nate Mitchell Co-Founder & Chief Product Officer | 12 patents Patents concentrated in computing, sensing & instrumentation | 1 launch · 1 partnership |
| 2 | SoundHound 🦄 Provider of cloud and AI-based sound recognition solutions for multiple applications | $191M | 27 mo ago | 201 | 2005 | Majid Emami Co-Founder | 442 patents Patents concentrated in computing, sensing & instrumentation | — |
| 3 | Suki Developer of an AI assistant for clinical documentation and reasoning 80AI top 18%Funding top 19%Innovation top 20%Patents top 24% All 14 signals ▾AItop 18% Fundingtop 19% Innovationtop 20% Patentstop 24% Techtop 28% Moattop 28% Producttop 29% Growthtop 36% Newstop 39% Talenttop 41% Partnerstop 45% Marketbottom 49% Globalbottom 42% Customersbottom 10% AI: Classified as an AI company · Holds AI/ML patents (G06N-family CPC) Funding: Raised $165M across 5 rounds · 5 rounds over 9 yrs (0.6/yr) rank vs industry peers · Fliar Intelligence Index 80/100 | $165M | 16 mo ago | 45 | 2017 | Punit Soni Co-Founder & CEO | 62 patents AI-powered speech-to-text and contextual note generation for clinical documentation | 3 partnerships |
| 4 | AssemblyAI Provider of speech to text solutions | $115M | 30 mo ago | 39 | 2017 | Dylan Fox Founder & CEO | — | 1 launch · 1 partnership |
| 5 | Tellme Voice Recognition Technology | $107M | 312 mo ago | 342 | 1999 | — | — | — |
| 6 | Yellow.ai Provider of an AI platform for automating customer and employee service | $102M | 58 mo ago | 469 469 → 860 (+83%) | 2016 | Raghu Ravinutala Co-Founder & CEO | — | — |
| 7 | Descript Provider of an AI-powered platform for video and podcast creation | $101M | 43 mo ago | 86 86 → 182 (+112%) | 2017 | — | 23 patents Patents concentrated in computing, sensing & instrumentation | — |
| 8 | Chorus.ai Conversational intelligence platform for sales | $100M | 70 mo ago | 90 | 2015 | Russell Levy Co-Founder & CTO | 37 patents Disinfection/decontamination hardware and gas-sensing technologies for hygiene and safety applications | — |
| 9 | Cartesia Provider of real-time text-to-speech API with AI laughter and emotion | $86M | 15 mo ago | — | 2023 | Albert Gu Co-Founder | — | 2 launchs |
| 10 | Deepgram Provider of AI-based speech transcription software 84Tech top 11%AI top 22%Funding top 23%Moat top 28% All 12 signals ▾Techtop 11% AItop 22% Fundingtop 23% Moattop 28% Innovationtop 35% Growthtop 37% Talenttop 38% Newstop 40% Patentstop 41% Markettop 43% Producttop 45% Globalbottom 39% Tech: 73 technologies across 6/8 capability areas · Cloud: Amazon Cloudfront, Amazon S3 AI: Classified as an AI company · Holds AI/ML patents (G06N-family CPC) rank vs industry peers · Fliar Intelligence Index 84/100 | $86M | 6 mo ago | 107 | 2015 | Scott Stephenson Co-Founder | 23 patents Efficient transformer-based speech recognition and training data alignment technologies | 2 launchs |
| 11 | Syllable Provider of an AI-based digital assistant for healthcare communication system | $86M | 49 mo ago | 46 | 2016 | Sarel Jooste Co-Founder | — | — |
| 12 | Five9 Provider of cloud contact center software with AI and automation | $84M | 72 mo ago | 1,513 1,513 → 3,066 (+103%) | 2001 | — | 42 patents AI-powered NLP training and call summarization for contact center automation | 2 partnerships · 2 awards |
| 13 | Speak Mobile app to practice conversational English 57Customers top 10%Moat top 22%Funding top 25%Tech top 33% All 10 signals ▾Customerstop 10% Moattop 22% Fundingtop 25% Techtop 33% Markettop 43% Talenttop 45% Producttop 46% Globalbottom 36% Growthbottom 22% Newsbottom 21% Customers: App rating 4.8★ (37,781 reviews) · Review volume +58% in 6 mo Moat: Editorial + unicorn rating 8/10 · Soonicorn rank vs industry peers · Fliar Intelligence Index 57/100 | $84M | 26 mo ago | 48 | 2016 | Connor Zwick Co-Founder & CEO | — | — |
| 14 | Rasa Developer of a platform for building and deploying AI agent solutions | $71M | 28 mo ago | 26 | 2016 | Alexander Weidauer Co-Founder | — | — |
| 15 | Otter.ai Developer of an AI meeting agent providing transcription and summarization | $70M | 63 mo ago | 125 | 2016 | Yun Fu Co-Founder & CTO | 34 patents Real-time AI transcription, summarization, and context-aware meeting capture technologies. | — |
| 16 | Wispr Flow Developer of AI-powered voice dictation software for seamless text creation 87Growth top 20%Tech top 28%AI top 30%Funding top 34% All 10 signals ▾Growthtop 20% Techtop 28% AItop 30% Fundingtop 34% Markettop 35% Talenttop 38% Moattop 40% Customerstop 47% Productbottom 48% Globalbottom 45% Growth: Web rank 500,000 → 50,000 YoY · Fresh capital in last 24 mo Tech: 50 technologies across 5/8 capability areas · Cloud: Amazon Cloudfront, Amazon S3 rank vs industry peers · Fliar Intelligence Index 87/100 | $70M | 7 mo ago | — | 2021 | Sahaj Garg Co-Founder & CTO | — | — |
| 17 | Orion AI-enabled workforce communication solution provider | $63M | 53 mo ago | 50 | 2013 | Gregory Taylor CEO & President | 158 patents Patents concentrated in electrical & electronics | — |
| 18 | Sanas AI powered accent translation software | $56M | 16 mo ago | 9 | 2020 | Anant S Co-Founder & Head of Revenue | 29 patents Neural speech processing: real-time accent conversion, voice enhancement, and noise suppression | — |
| 19 | Promptu Provider of voice recognition and natural language understanding technology | $53M | 207 mo ago | 10 | 2000 | — | — | — |
| 20 | Brain AI Provider of an AI-based real-time generative computer interface | $52M | 58 mo ago | 85 | 2015 | Jerry Yue Founder and CEO | 576 patents Robotic perception, mapping, and navigation with multi‑sensor calibration and data de‑duplication | — |
| 21 | PullString Provider of a cloud and AI-based publishing platform for voice apps | $45M | 122 mo ago | 40 | 2011 | — | 8 patents AI-powered tools for creating, animating, and delivering interactive audio-visual characters | — |
| 22 | Siri Intelligent assistant for Apple devices, simplifying tasks with voice and privacy | $40M | 198 mo ago | 18 | — | — | — | — |
| 23 | Voiceflow Provider of a platform to build and scale AI agent solutions | $38M | 34 mo ago | 73 | 2018 | Andrewe Lawrence Co-Founder | — | — |
| 24 | Eta Compute Manufacturer of the SoCs for edge computing and embedded systems | $32M | 66 mo ago | 16 16 → 8 (-50%) | 2015 | — | — | — |
| 25 | VoiceBase Provider of call center analytics solutions | $32M | 125 mo ago | 28 | 2010 | Walter Bachtiger Co-Founder & CEO | 6 patents Speech transcription, analytics, and anonymization platform for audio media content | — |
| 26 | Voicea Provider of an AI-based meeting and agenda management platform | $28M | 87 mo ago | 19 | 2016 | — | — | — |
| 27 | Clearspeed Provider of AI and voice-based risk assessment platform | $27M | 11 mo ago | 100 | 2016 | Kurt Martin Co-Founder | 2 patents Audio sample quality control and assessment in digital sound processing | — |
| 28 | Sensely Conversational AI solutions for enterprises | $26M | 79 mo ago | 9 | 2013 | — | — | — |
| 29 | Avaamo Provider of conversational AI platform for enterprises | $24M | 58 mo ago | 19 | 2014 | Ram M Founder and CEO | — | 1 partnership |
| 30 | Bland Provider of AI phone calling solutions | $22M | 21 mo ago | — | 2023 | Sobhan Nejad Co-Founder & COO | 6 patents Modular anchoring systems for construction and marine structures | — |
| 31 | Nexmo Provider of voice and messaging API for enterprises to reach customers | $22M | 148 mo ago | 38 | 2010 | — | 60 patents Patents concentrated in electrical & electronics | — |
| 32 | PlayAI Provider of AI voice generator | $22M | 18 mo ago | — | 2019 | Mahmoud Felfel Co-Founder & CEO | — | — |
| 33 | Fireflies 🦄 Provider of a platform automating meeting transcription and summarization | $19M | 60 mo ago | 78 | 2016 | — | — | — |
| 34 | BoomCloud 360 Developer of cloud-based platform optimizing sound on devices and content | $18M | 100 mo ago | 19 | 2014 | — | 277 patents Advanced spatial audio processing and crosstalk cancellation for immersive sound reproduction | — |
| 35 | Ava Provider of AI-based transcription and captioning services for various applications | $16M | 49 mo ago | 20 | 2014 | — | 159 patents Scalable blockchain consensus, smart‑contract precompiles, and NFC payment wallet integration. | — |
| 36 | Avoma Developer of an AI platform for meeting management and team collaboration | $15M | 53 mo ago | 15 | 2017 | Albert Lai Co-Founder | — | — |
| 37 | Audience Advisor and investor in premium domain names and Web 3.0 | $15M | 195 mo ago | 199 | 2000 | — | 190 patents Advanced audio signal processing and speech AI for noise suppression, enhancement, and latency reduction | — |
| 38 | Resemble AI It provides AI-based voice duplication systems | $12M | 3 mo ago | 21 | 2019 | Saqib Muhammad Co-Founder | — | — |
| 39 | Drivemode App-based digital assistance for driver | $12M | 110 mo ago | 9 | 2014 | Yo Koga Chief Executive Officer | 8 patents Patents concentrated in computing, sensing & instrumentation | — |
| 40 | Teachfx AI-driven application to measure student engagement | $12M | 44 mo ago | 18 18 → 23 (+28%) | 2017 | Jamie Poskin Founder | — | — |
| 41 | millionways Provider of an AI-based personality analytics platform | $10M | 38 mo ago | 14 | 2017 | — | — | — |
| 42 | Gnani.ai Provider of AI-powered voice and chat automation platform for enterprises | $8M | 2 mo ago | 119 119 → 265 (+123%) | 2016 | Ganesh Gopalan Co-Founder & CEO | — | 1 job opening · 3 internships · 2 launchs |
| 43 | Willow Voice Provider of AI-powered voice dictation software for all applications | $5M | 7 mo ago | — | 2024 | Ian Ye Co-Founder | — | 3 launchs |
| 44 | Phonic Developer of a voice AI platform for building and evaluating voice agents. | $4M | 14 mo ago | — | 2024 | Nikhil Murthy Co-Founder | — | — |
| 45 | Rime Developer of text-to-speech platform providing customizable, realistic, and fast voice generation | $3M | 12 mo ago | 6 | 2020 | Lily Clifford Founder & CEO | — | 1 partnership |
| 46 | Kalpa Labs Developer of speech models focused on large action models and efficiency | $500K | 8 mo ago | — | 2025 | Prashant Shishodia Co-Founder & CEO | — | — |
| 47 | Blue Developer of an AI assistant enabling hands-free iPhone application control | $500K | 12 mo ago | — | 2024 | Peter Krogh Co-Founder | 13 patents CNC sheet‑metal slitting, leveling, and handling machines for precision metal processing | 1 launch |
| 48 | Retell Developer of an AI voice agent platform for call automation | $500K | 21 mo ago | — | 2023 | Todd Li Co-Founder | — | 2 launchs · 4 partnerships |
| 49 | Shiboleth Generative AI and deep learning-based audio fraud protection services | $500K | 24 mo ago | — | 2023 | Esty Scheiner Co-Founder | — | — |
| 50 | Roark Provider of testing platform for voice AI | $500K | 12 mo ago | — | 2020 | Daniel Mizzi Co-founder & CTO | — | — |
Top 12 Speech and Voice Recognition companies in California
#1
Series B · San Francisco, California · founded 2023$250Mraised▾
Series B · San Francisco, California · founded 2023
Developer of voice-based artificial intelligence companions and lightweight eyewear products. The company focuses on creating lifelike computer interactions through voice technology. It aims to develop a personal agent that can assist users and provide information. The company also designs eyewear with high-quality audio to provide convenient access to a companion.
Fliar Intelligence Index™ 82how this company ranks against its industry peers
Funding
top 18%AI
top 28%Talent
top 28%Patents
top 34%Innovation
top 36%Tech
top 41%Funding: Raised $250M across 1 rounds · 1 rounds over 1 yrs (1.0/yr) · Last round Series B (Oct 2025)
AI: Holds AI/ML patents (G06N-family CPC) · Product described with: artificial intelligence
Talent: 4 named leaders on record · 4 C-suite/founder profiles curated
Audience (LinkedIn): 24k LinkedIn followers — 2.3% of this cohort's audience
Hiring (LinkedIn): 3 hiring posts in 12 mo (public) · momentum +3 · hiring: Industrial Designer, ML Scientist
Activity (LinkedIn): 2 product launches · 1 partnerships (incl. SMPL) announced in 12 mo
Funding rounds
- Oct 2025Series B$250M
Founders & team
Investors
Sequoia Capital, Spark Capital, Summit Partners
Tech stack
Apple Icloud MailDatadogDatocmsGoogle AnalyticsGoogle WorkspaceGsap
#2
Series C · San Francisco, California · founded 2015 · 107 employees$85.9Mraised▾
Series C · San Francisco, California · founded 2015 · 107 employees
Provider of AI-based speech transcription software. It uses deep learning-enabled and custom-trained speech models to process voice data. Its features include speech-to-text, real-time streaming, multi-language support, as well as on-premise deplorability. It has applications in monitoring sales and support calls. Caters to the Finance, Government, and Software industries.
Fliar Intelligence Index™ 84how this company ranks against its industry peers
Tech
top 11%AI
top 22%Funding
top 23%Moat
top 28%Innovation
top 35%Growth
top 37%Tech: 73 technologies across 6/8 capability areas · Cloud: Amazon Cloudfront, Amazon S3 · Observability: Datadog, Fullstory
AI: Classified as an AI company · Holds AI/ML patents (G06N-family CPC) · Product described with: ai-based, deep learning
Funding: Raised $85.9M across 6 rounds · 6 rounds over 10 yrs (0.6/yr) · Last round Series C (Dec 2025)
Audience (LinkedIn): 41k LinkedIn followers — 4.0% of this cohort's audience
Activity (LinkedIn): 2 product launches announced in 12 mo
Funding rounds
- Dec 2025Series C$143.2M
- Nov 2022Series B$47M
- Jan 2021Series B$25M
- Jun 2020Series A—
Founders & team
Investors
Wing Venture Capital, SAP.iO, Y Combinator, Nvidia, Madrona, Alkeon Capital Management
Tech stack
Amazon CloudfrontAmazon S3Amazon Web ServicesCloudflareCloudflare Bot ManagementContentsquare
#3
Series A · San Francisco, California · founded 2021$69.6Mraised▾
Series A · San Francisco, California · founded 2021
Developer of AI-powered voice dictation software for seamless text creation. This software offers effortless voice dictation across various applications, significantly increasing writing speed and accuracy. It adapts to different writing styles and contexts, automatically correcting errors and understanding nuanced language. The software includes features such as AI command mode for document control and whispering mode for discreet use. It is designed to improve writing efficiency and overcome writer's block by allowing users to focus on their thoughts rather than the mechanics of typing.
Fliar Intelligence Index™ 87how this company ranks against its industry peers
Growth
top 20%Tech
top 28%AI
top 30%Funding
top 34%Market
top 35%Talent
top 38%Growth: Web rank 500,000 → 50,000 YoY · Fresh capital in last 24 mo
Tech: 50 technologies across 5/8 capability areas · Cloud: Amazon Cloudfront, Amazon S3 · Observability: Microsoft Clarity, Sentry
AI: Classified as an AI company · Product described with: ai-powered
Funding rounds
- Nov 2025Series A$25M
- Jun 2025Series A$30M
- Oct 2022Series A$10M
- Oct 2022Conventional Debt—
Founders & team
Investors
Menlo Ventures, New Enterprise Associates, 8VC, Notable Capital, Flight Fund, TriplePoint Capital
Tech stack
Amazon CloudfrontAmazon S3Amazon Web ServicesApple Sign-InCloudflareCloudflare Browser Insights
#4
Series B · Santa Clara, California · founded 2019 · 21 employees$12Mraised▾
Series B · Santa Clara, California · founded 2019 · 21 employees
Resemble provides AI-based voice duplication systems. It provides solutions to cloning, languages, games, smart assistant, and digital characters. It provides voice content that can be consumed via Web or API.
Funding rounds
- Mar 2026Series B—
- Dec 2025Series B$13M
- Jul 2023Series A$8M
- May 2021Seed—
Founders & team
Investors
Mercuri, Craft Ventures, AET Fund, Firstminute Capital, Betaworks, Javelin Venture Partners
Tech stack
BootstrapBugherdCloudflareCloudflare Bot ManagementCloudflare Browser InsightsCore-Js
#5
Series B · Covina, California · founded 2016 · 119 employees$7.7Mraised▾
Series B · Covina, California · founded 2016 · 119 employees
Provider of AI-powered voice and chat automation platform for enterprises. The platform offers tools for building agentic AI agents, speech-to-text conversion, and real-time translation. It provides features such as voice biometrics, call analytics, and automated quality assurance. The platform supports omnichannel automation, multilingual capabilities, and integration with various enterprise systems.
LinkedIn Pulse recent public activity · Jul 2026
Audience: 117k LinkedIn followers — 11.3% of this cohort's audience
Hiring: 1 hiring post in 12 mo (public) · hiring: Senior Staff Engineer — Voice AI Platform
Activity: 2 product launches announced in 12 mo
Funding rounds
- Mar 2026Series B$10M
- Jul 2024Series A$4M
- Mar 2022Series A$832.2K
- Aug 2021Series A$1.2M
Founders & team
Investors
Samsung Venture Investment, Info Edge Ventures, Startup Karnataka, Commonwealth Inclusive Growth Services, Aavishkaar Capital, Deep Learning
Tech stack
AddtoanyAddtoany Share ButtonsAmazon S3Amazon Web ServicesApple Icloud MailAzure
#6
Series D · Redwood City, California · founded 2017 · 45 employees$165Mraised▾
Series D · Redwood City, California · founded 2017 · 45 employees
Developer of an AI assistant for clinical documentation and reasoning. The AI solution captures patient conversations to generate notes, instructions, and orders. It adapts to clinician workflows, streamlining documentation across care settings. The platform integrates with major EHRs and health technology applications. It offers capabilities spanning pre-charting, documentation, and clinical decision support.
Fliar Intelligence Index™ 80how this company ranks against its industry peers
AI
top 18%Funding
top 19%Innovation
top 20%Patents
top 24%Tech
top 28%Moat
top 28%AI: Classified as an AI company · Holds AI/ML patents (G06N-family CPC)
Funding: Raised $165M across 5 rounds · 5 rounds over 9 yrs (0.6/yr) · Last round Series D (Jan 2025)
Innovation: 62 patents (top 22% of patent-holders) · 55 filings since 2022 vs 6 in 2017-21 · 5 product lines
Audience (LinkedIn): 39k LinkedIn followers — 3.7% of this cohort's audience
Activity (LinkedIn): 3 partnerships (incl. Sevocity Electronic Health Records) announced in 12 mo
Funding rounds
- Jan 2025Series D—
- Oct 2024Series D$70M
- Dec 2021Series C$55M
- Mar 2020Series B$20M
Founders & team
Investors
Flare Capital Partners, First Round Capital, Venrock, Breyer Capital, Epsilon Health Investors, March Capital
Tech stack
CloudflareCloudflare Bot ManagementCloudflare Browser InsightsCookieyesCore-JsEmotion
#7
Series A · San Francisco, California · founded 2023$86Mraised▾
Series A · San Francisco, California · founded 2023
Provider of real-time text-to-speech API with AI laughter and emotion. The company offers models, agents, and solutions for various applications. These include customer service, healthcare, gaming, and logistics. It provides voice cloning and supports multiple languages. The company focuses on developer-first, enterprise-ready solutions with API and SDK integration.
LinkedIn Pulse recent public activity · Jul 2026
Audience: 27k LinkedIn followers — 2.6% of this cohort's audience
Activity: 2 product launches announced in 12 mo
Funding rounds
- Mar 2025Series A$64M
- Dec 2024Seed$22M
Founders & team
Investors
Index Ventures, Lightspeed Venture Partners, FactoryHQ, Conviction, SV Angel, General Catalyst
Tech stack
Base UiCart FunctionalityClerkCloudflareCloudflare Bot ManagementCore-Js
#8
Series D · San Diego, California · founded 2016 · 100 employees$27Mraised▾
Series D · San Diego, California · founded 2016 · 100 employees
Provider of AI and voice-based risk assessment platform. It provides a platform that supports businesses in voice analytics to track risks and alert users on possible fraud. It offers data to its users to support customer experience. It leverages AI technology for identifying conversational fraud analysis. It also provides tools for identifying financial fraud, security risks, IP theft prevention, supply chain compliance, transaction or individual vetting, and more.
LinkedIn Pulse recent public activity · Jul 2026
Audience: 6k LinkedIn followers
Funding rounds
- Jun 2025Series D$60M
- Oct 2022Series C$27M
Founders & team
Investors
King Philanthropies, Align Private Capital, IronGate Capital Advisors, KBW Ventures, Bravo Victor Venture Capital, Mobeus Equity Partners
Tech stack
Amazon S3Amazon SesAmazon Web ServicesCloudflareCloudflare Bot ManagementCore-Js
#9
Series B · Palo Alto, California · founded 2020 · 9 employees$56.4Mraised▾
Series B · Palo Alto, California · founded 2020 · 9 employees
AI powered accent translation software. The platform analyzes conversations and provides accent matching support. It modulates accents in real-time, and preserves voices and emotions. The platform integrates a virtual microphone with agent system to streamline the translation process. Its patented technology eliminates noise and preserves natural voice, ensuring seamless communication. With a focus on breaking down language barriers, it aims to enable effortless communication globally.
LinkedIn Pulse recent public activity · Jul 2026
Audience: 34k LinkedIn followers — 3.2% of this cohort's audience
Funding rounds
- Feb 2025Series B$65M
- Mar 2023Series B$14.7M
- Mar 2022Series A$36.1M
- Aug 2021Seed$5.5M
Founders & team
Investors
General Catalyst, Quiet Capital, DN Capital, Human Capital, Insight Partners, Google Ventures
Tech stack
Amazon Web ServicesChili PiperCloudflareCloudflare Bot ManagementCore-JsCrazy Egg
#10
Seed · San Francisco, California · founded 2024$5Mraised▾
Seed · San Francisco, California · founded 2024
Provider of AI-powered voice dictation software for all applications. This software offers fast and accurate speech-to-text conversion, adapting to individual speaking styles and automatically correcting errors and formatting text. It supports multiple languages and works seamlessly across various platforms and applications, eliminating the need for copying and pasting. The software prioritizes user privacy with end-to-end encryption. Custom dictionaries can be added to increase accuracy. Background noise is filtered to ensure clear transcription, even in quiet environments.
LinkedIn Pulse recent public activity · Jul 2026
Audience: 12k LinkedIn followers
Activity: 3 product launches announced in 12 mo
Funding rounds
- Nov 2025Seed$4.5M
- Jun 2025Seed$500K
Founders & team
Investors
Y Combinator, BoxGroup, Burst Capital, Seven Seven Six
Tech stack
CloudflareCloudflare Bot ManagementCore-JsFacebook PixelFramer SitesGoogle Analytics
#11
Public · Santa Clara, California · founded 2005 · 201 employees$191Mraised▾
Public · Santa Clara, California · founded 2005 · 201 employees
Provider of cloud and AI-based sound recognition solutions for multiple applications. It is a mobile application for consumers to search and discover music via voice control. The engine is based on its proprietary technologies speech-to-meaning and deep meaning understanding, it allow users to ask multiple questions and filter results. Features include natural language understanding, speech recognition, audio and music identification, multi-lingual text-to-speech, and more. It offers applications for iOS and Android users.
LinkedIn Pulse recent public activity · Jul 2026
Audience: 101k LinkedIn followers — 9.8% of this cohort's audience
Funding rounds
- Feb 2024Post IPO$3.7M
- Jan 2023Post IPO$25.1M
- May 2018Series E$100M
- Jan 2018Series D—
Founders & team
Investors
Walden Venture Capital, Nvidia, Tencent, Mercedes-Benz, Hyundai Motor Company, Midea
Tech stack
Acquia Cloud PlatformAcquia Cloud Site FactoryAdobe AnalyticsAdobe Experience Platform Identity ServiceAdobe Experience Platform LaunchAmazon Advertising
#12
Acquired · Palo Alto, California · founded 2019$21.5Mraised▾
Acquired · Palo Alto, California · founded 2019
Provider of AI voice generator. It can clone and generate speech with hyper-realism across any language.
Funding rounds
- Nov 2024Seed$21M
- 2023Seed$500K
Founders & team
Investors
Kindred Ventures, 500 Global, Race Capital, Y Combinator, Soma Capital, TRAC
Tech stack
CloudflareCloudflare Browser InsightsDocusignGoogle AnalyticsGoogle Font ApiGoogle Tag Manager
Funding & investor landscape
$2.5Btotal disclosed funding
69companies funded
181disclosed rounds
1rounds last 90 days
Most active investors
New Enterprise Associates4 rounds
SV Angel4 rounds
Intel Capital3 rounds
Notable founders
Nate Mitchell
Co-Founder & Chief Product Officer · Sesame
Ryan Brown
Co-Founder · Sesame
Adam Sypniewski
CTO · Deepgram
Scott Stephenson
Co-Founder · Deepgram
Sahaj Garg
Co-Founder & CTO · Wispr Flow
Tanay Kothari
Co-Founder & CEO · Wispr Flow
Saqib Muhammad
Co-Founder · Resemble AI
Zohaib Ahmed
Co-Founder & CEO · Resemble AI
Ganesh Gopalan
Co-Founder & CEO · Gnani.ai
Ananth Nagaraj
Co-Founder & CTO · Gnani.ai
Punit Soni
Co-Founder & CEO · Suki
Albert Gu
Co-Founder · Cartesia
Prism market signals · United States · country-scoped Prism corpus, 18,724,995 docs
Market landscape — 10 sub-themes by coverage
Share of Speech and Voice Recognition coverage by sub-theme.
Regulatory-risk over time rising
Funding & growth over time
funding rising · growth rising
RESEARCH IN CALIFORNIA · AI & Compute
How research on Speech Ai in California is moving
A read on the academic research around Speech Ai in California — which themes are gaining ground, the institutions and researchers driving them, and how the tone is shifting. Based on 474 papers.
UC Berkeley, UCLA, and USC lead California's speech-AI research across phonetics, brain-computer interfaces, and synthesis, with overwhelmingly optimistic momentum (breakthrough/advancement dominating concern 6:1).
474 papers · stance +0.51 · 44% breakthrough · 13% concern
top institutions
- University of California, Berkeley76
- University of California, Los Angeles59
- University of Southern California57
- University of California, Davis51
- University of California, San Diego47
leading researchers
Edward F. Chang · Shrikanth Narayanan · Sudarsana Reddy Kadiri · Georgia Zellou · Matthew K. Leonard · Steven J. Luck
prism intelligence · tone & topics
91% positive · 0% critical tone
Artificial IntelligenceMachine LearningHealthNeuroscienceComputer ScienceBiology
▲
Breakthroughs179 · 38%
▲ 35%→39% share
▲1.1× share momentum0 median citations75% since 2021mostly methods-led
Electroencephalography research is surging — papers rose from 1 to 13, signaling brain-signal speech decoding as a rapidly emerging frontier.
rising sub-themes (early→recent)
- Speech recognition12→33
- Pattern recognition (psychology)2→16
- Electroencephalography1→13
- Robustness (evolution)1→8
- Natural language processing5→12
Newly emergingTransformer 0→9 · Pipeline (software) 0→7 · Decoding methods 0→6
Landmark Attention Is All You Need · 6,510 cites
◆
Advancements172 · 36%
▼ 38%→36% share
▼0.9× share momentum0 median citations73% since 2021mostly empirical
Neural decoding and gesture recognition newly emerged, while Decoding methods climbed 1→11, advancing multimodal speech-AI pipelines.
rising sub-themes (early→recent)
- Speech recognition14→35
- Pattern recognition (psychology)5→17
- Decoding methods1→11
- Perception3→13
- Word (group theory)1→8
Newly emergingGesture recognition 0→5 · Neural decoding 0→5 · Linguistics 0→5
Landmark Natural TTS Synthesis by Conditioning Wavenet on MEL Spectrogram Predictions · 2,596 cites
▼
Concerns54 · 11%
▼ 12%→11% share
▼0.9× share momentum0 median citations72% since 2021mostly empirical
Noise and speech-perception vulnerabilities newly surfaced, as Perception concerns intensified from 2→8 papers.
rising sub-themes (early→recent)
- Speech recognition2→9
- Perception2→8
- Pattern recognition (psychology)1→6
- Stimulus (psychology)1→4
- Sensory system1→3
Newly emergingSensitivity (control systems) 0→3 · Speech perception 0→3 · Noise (video) 0→3
Landmark Speech Production as State Feedback Control · 436 cites
Common questions
How many Speech and Voice Recognition companies are there in California, United States?
Radar tracks 134 indexable Speech and Voice Recognition companies headquartered in California, United States that meet our profile-completeness bar.
What is the total funding raised by Speech and Voice Recognition companies in California, United States?
The Speech and Voice Recognition companies in California, United States on this list have raised a combined $2.5B in disclosed equity funding across 69 funded companies.
Which is the highest-funded Speech and Voice Recognition company in California, United States?
Sesame is the highest-funded Speech and Voice Recognition company in California, United States, with $250M in disclosed equity funding.
How many Speech and Voice Recognition companies in California, United States are funded?
69 of the 134 Speech and Voice Recognition companies in California, United States on this list have disclosed at least one equity funding round.
How many Speech and Voice Recognition unicorns are there in California, United States?
2 Speech and Voice Recognition companies in California, United States on this list are valued at $1B or more.
Who are the top investors in California, United States Speech and Voice Recognition companies?
The most active investors in California, United States Speech and Voice Recognition companies on this list include Y Combinator, 500 Global, Khosla Ventures, New Enterprise Associates, SV Angel.
Riya SenguptaFinancials
Riya reads income statements for fun. She covers the real money in a sector — revenue, growth, who actually earns — and never met a vague claim she didn't want a number for.