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Willow

YC X25

San Francisco, US · Founded 2025 · 7 employees · Hiring · 9 known investors

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Willow is a voice-to-text application that transcribes and formats spoken words into written text across desktop and mobile devices. It serves professionals and knowledge workers across any app or device, using AI to handle formatting, punctuation, and style adaptation.

Also known as Willow Voice

AI & Machine LearningConsumerDeveloper ToolsFuture of WorkArtificial IntelligenceProductivityAIUnited States of AmericaAmerica / Canada

Founders & leadership· Y Combinator alumni (X25)

Willow was founded in 2025 by Allan Guo.

AGAllan Guo
Allan GuoCo-founder & CEOAllan Guo studied computer science at Stanford and conducted research in machine learning and neuroscience at Stanford Medical School. He co-founded and leads Willow, and has previously worked on ventures in music, healthcare technology, and e-commerce.

Investors · 9

Seven Seven Sixlisted by Seven Seven SixPalm Beach Gardens · $500K – $5M

How we know: sevensevensix.com · open dataset · 5k.vc investor directory · Not right? Tell us

Y Combinatorlisted by Y CombinatorSan Francisco · $500K

How we know: the Y Combinator directory · Not right? Tell us

Goodwater CapitalreportedBurlingame · $5M – $50M

How we know: open dataset · 5k.vc investor directory · Not right? Tell us

Hetz VenturesreportedTel Aviv · $1M – $10M

How we know: funding news · Not right? Tell us

Liquid VenturesreportedSan Francisco · $250K – $5M

How we know: open dataset · 5k.vc investor directory · Not right? Tell us

New Enterprise Associates (NEA)reportedMenlo Park · $200K – $40M

How we know: open dataset · 5k.vc investor directory · Not right? Tell us

Phyto PartnersreportedBoca Raton

How we know: open dataset · 5k.vc investor directory · Not right? Tell us

SmartFinreportedBrussels · $1.1M – $55M

How we know: open dataset · 5k.vc investor directory · Not right? Tell us

Funding

SEC filings, press & company announcements

$14M disclosed across 2 rounds · 2026

Source: company announcements and press reports — follow each round's link for the claim.

Related companies · 9

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Aqua VoiceAqua Voice is an AI-powered voice-to-text application that converts speech into refined text in real time for use across apps, from coding to writing and team communication. It serves developers, content creators, and professionals seeking faster typing alternatives with accuracy optimized for technical and natural language contexts.
ZapierZapier provides a platform for connecting AI models and agents to workflows and business applications, enabling teams to automate tasks across over 9,000 apps without coding. The platform serves enterprises, operations teams, and businesses of all sizes looking to deploy AI-driven automation for lead capture, customer support, employee onboarding, and other business processes.
Retell AIRetell AI builds an enterprise-grade voice AI platform that handles phone calls for industries including healthcare, delivery, and insurance. The platform enables businesses to automate customer-facing voice interactions.
AI toolsNotta provides AI-powered transcription tools available as a web app, mobile app, and Chrome extension, along with features such as AI summaries, meeting minutes, screen recording, and a sales-focused AI agent for recording and analyzing meetings and syncing with CRM. It serves individuals and businesses looking to transcribe and organize voice and meeting content.
RoarkRoark builds a quality testing platform for voice AI agents using audio-based evaluation models. The platform allows teams to simulate calls before launch, score production conversations on audio, and validate fixes before customer deployment in healthcare, finance, insurance and other regulated industries.
LindyLindy is an AI executive assistant that manages email, schedules meetings, takes notes, and handles administrative tasks for individual professionals and teams. It integrates with email, calendar, and hundreds of third-party applications to automate workplace busywork.
AptenApten builds AI agents that automate student enrollment workflows for educational institutions across SMS, phone, email, and web channels. The platform manages student communications throughout their lifecycle—from prospecting to re-engagement—while maintaining conversation context across all touchpoints and integrating with existing CRM and admissions systems.
Raven TechRaven Tech develops artificial intelligence and data processing systems, with a focus on next-generation operating system technology.

Companies working in the same space as Willow.

In the news

Willow Voice - Voice is Your New Keyboardycombinator.com · May 2025

Frequently asked questions

What does Willow do?
Willow is a voice-to-text application that transcribes and formats spoken words into written text across desktop and mobile devices. It serves professionals and knowledge workers across any app or device, using AI to handle formatting, punctuation, and style adaptation.
Who founded Willow?
Willow was founded by Allan Guo in 2025.
Who are Willow's investors?
Willow's investors include BoxGroup, Seven Seven Six, Y Combinator, Goodwater Capital, Hetz Ventures, Liquid Ventures, New Enterprise Associates (NEA), Phyto Partners and 1 more.
How much funding has Willow raised?
Willow has disclosed $14M raised across 2 rounds.
Where is Willow headquartered?
Willow is headquartered in San Francisco, US.