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OSS dev tool that builds entire apps from scratch by talking to you
Also known as GPT Pilot · GPT-Pilot · Pythagora · Pythagora.ai
Founders & leadership
Investors · 14
How we know: funding news · the VCSheet dataset · open dataset · 5k.vc investor directory · research · nordic9.com · Not right? Tell us
How we know: Moonfire Ventures's portfolio page · a partner's Signal profile · research · nordic9.com · Not right? Tell us
How we know: research · nordic9.com · open dataset · 5k.vc investor directory · rebelfund.vc · Not right? Tell us
How we know: funding news · press coverage · research · nordic9.com · Not right? Tell us
How we know: funding news · press coverage · research · nordic9.com · open dataset · 5k.vc investor directory · Not right? Tell us
How we know: funding news · press coverage · research · nordic9.com · Not right? Tell us
How we know: the VCSheet dataset · Not right? Tell us
Also in the syndicate · 5
Company profile
researched Aug 2026Pythagora AI develops an AI-powered software development tool that writes complete applications from ordinary-language conversation with a developer. Its initial product, GPT Pilot, is an open-source tool distributed as a Visual Studio Code extension that uses large language models, including GPT-4, to create applications through conversational interaction. The tool asks clarifying questions when a description is incomplete, writes modular code, requests developer confirmation before executing code, and reviews and fixes errors it encounters.
The company subsequently launched the Pythagora platform, positioned as a comprehensive AI developer environment that produces full-stack applications from a single prompt. Rather than generating code immediately, the platform first drafts a specification and a task list, after which an agent system writes frontend code, connects APIs, builds backend logic, manages databases and fixes its own errors using logs and breakpoints. The platform supports interactive debugging inside Visual Studio Code, lets users integrate their own APIs and import Swagger documentation, and keeps generated code open, editable and portable rather than locked to the vendor. Reported roadmap items as of the 2024 seed announcement included cloud deployment and automated test creation within the extension.
Founding story
Pythagora was founded in 2023 by Croatian entrepreneurs and engineers Leon Ostrez, Senko Rašić and Zvonimir Sabljić, who have backgrounds in software development and AI. Zvonimir Sabljić serves as co-founder and CEO. The open-source GPT Pilot tool emerged from the team's research into how much of the app-building process could be reliably automated with LLMs while retaining developer oversight.
Business model
The company offers an AI development platform, described by one investor profile as a B2B SaaS enterprise software product, built around an open-source core (GPT Pilot) delivered as a Visual Studio Code extension.
Traction
Investors include Y Combinator, Inovo, 500 Emerging Europe, Moonfire, Rebel and Uphonest Capital. Funding was earmarked for scaling research and development and for growing user adoption.
Latest developments
Pythagora launched its full-stack development platform, presented as an integrated AI developer environment that generates and runs applications from a single prompt for technical and non-technical users.
▸Full profile — market position, technology, go-to-market, geography, history
Market position
Pythagora positions itself as a complete AI developer covering the full development process from prompt to production, in contrast to assistants that generate code snippets or tools focused mainly on frontend output, and states it is the only platform in its category that does not delegate security to AI systems.
The company emphasises coverage of the full development workflow, including debugging, refactoring, code commits and bug fixes; interactive debugging and explanation of the agent's decisions within Visual Studio Code; user ownership of open, portable code without vendor lock-in; and human-controlled security.
Technology
The product uses large language models, including GPT-4, together with machine learning techniques and a multi-agent architecture. The system first generates a specification and task breakdown, then agents write frontend code, wire up APIs, implement backend logic, manage databases and debug using logs and breakpoints. Human oversight is retained by design: the tool asks clarifying questions and seeks developer approval before executing code, and the company states that security is handled by humans rather than delegated to AI systems.
Go-to-market
Distribution is centred on an open-source tool and a Visual Studio Code extension, which the company has said it will use to drive user adoption alongside continued research and development funded by its seed round.
Software developers and both technical and non-technical teams building internal dashboards, business-process automation and new digital products, including users new to prompt-based ("vibe") coding.
Geography
Founded in Croatia by Croatian founders and subsequently based in London; investors are based in the United States and Poland.
History
The startup was launched in 2023 in Croatia and released GPT Pilot, an open-source AI developer tool, as its first product. In May 2024 it announced a $4 million seed round. It later moved its base to London and introduced the Pythagora platform, described as an end-to-end AI developer platform for creating and running full-stack applications from a single prompt.
Compiled by commissioned research from 7 cited public sources — announcements, filings, and press listed under research sources below.
Key figures
latest reportedCompany-reported or press-reported figures, each dated to when it was claimed — not independently audited.
Founder mafia
2 people who came through Pythagora went on to found or lead other companies.
Timeline · 3
launches, deals, and filingsPythagora presented its platform as a comprehensive AI developer environment that creates and runs full-stack applications from a single prompt, combining frontend and backend development with debugging tools for technical and non-technical teams.
Pythagora AI announced the close of a $4 million seed funding round, with proceeds directed to research and development and to growing user adoption. Investors include Y Combinator, Inovo, 500 Emerging Europe, Moonfire, Rebel and Uphonest Capital.
$4M source ↗
Pythagora's first product, GPT Pilot, is an open-source AI coding tool available as a Visual Studio Code extension that builds applications through natural language conversation using GPT-4.
Dated company events from announcements, filings, and press; legal rows summarize public dockets and regulator releases.
In the news
▸Research sources · 7
primary sources listed
- Pythagora AI to raise $4 million in a seed round backed by Inovo, 500 Emerging Europe, Moonfire, Rebel, and Uphonest Capital. | Nordic 9nordic9.com · web
7 public sources were cited for this profile; the first-party ones are listed here.
Frequently asked questions
- What does Pythagora do?
- Pythagora AI is an AI development platform that builds, debugs and deploys full-stack applications from natural language prompts.
- Who founded Pythagora?
- Pythagora was founded by Zvonimir Sabljić.
- Who are Pythagora's investors?
- Pythagora's investors include Inovo VC, Maiora Rebel Ventures, Moonfire Ventures, Rebel Fund, 500 Emerging Europe, SQ Capital, UpHonest Capital, Y Combinator and 1 more.