Gregor Zunic

Gregor Zunic
Occupation	Software developer, startup founder
Known for	Co-founder of Browser Use
Education	ETH Zurich

Gregor Zunic is a software developer and startup founder based in San Francisco. He is the co-founder of Browser Use, an open-source library for AI browser automation, which he created alongside Magnus Müller. The project gained significant traction, accumulating over 50,000 GitHub stars within three months of its launch and later exceeding 75,000 stars.

Early career

Zunic studied at ETH Zurich, where he met co-founder Magnus Müller. Prior to Browser Use, Zunic built several ventures. He co-founded Real Fake Photos, an AI headshot generator that grew to over 100,000 users. He also created Spexia, a search engine optimization tool aimed at startup founders, which he developed from 2023 to 2024. Despite Spexia's growing revenue, Zunic left the project in July 2024, citing a lack of motivation and a desire to work on more technically ambitious problems.

Browser Use

After leaving Spexia, Zunic and Müller began experimenting with web scraping and observed that AI agents had difficulty interacting with web browsers reliably. Existing tools were fragile and required frequent maintenance. They built a prototype of Browser Use in five weeks. The tool converts website interfaces into structured text that AI models can process, parsing both HTML and visual elements to enable agents to click buttons, fill forms, and navigate websites. This approach differs from screenshot-based methods, which tend to be less reliable.

Browser Use launched on GitHub and quickly went viral. The project received additional attention in March 2025 when it was identified as one of the tools powering Manus, a Chinese AI agent platform that had itself gained widespread notice. Browser Use was part of Y Combinator's Winter 2025 batch. The company raised $17 million in funding led by Felicis Ventures, with participation from Paul Graham and Y Combinator, among other investors. The company operates from San Francisco and provides both the open-source library and a commercial cloud API for browser automation at scale.

Browser Use's website lists teams at companies including Airbnb, Amazon, Anthropic, Apple, Google, Meta, Microsoft, OpenAI, Stripe, and others as users of the tool. The company positions its product in the artificial intelligence, open source, API, and automation sectors.