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Epicenter

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ChatGPT's memory feature in an open, portable format

Summer 2025Founded 20251 peopleSan Francisco, CA, USA

About

Epicenter is an ecosystem of open-source, local-first apps that share a memory. We store all your work—notes, transcripts, chat histories—in a single folder of plain text and SQLite. Every tool we build shares this memory: your text editor, personal assistant, etc.. It's open, tweakable, and yours. Grep it, open it in Obsidian, host it wherever you like. The choice is yours. Our vision is to build a personal workspace where you own your data, choose your own AI models, and replace siloed apps with open, interoperable alternatives. All while preserving authenticity and being free and open source. ❤️

Founders · 1

Braden Wong
Braden WongFounder
Yale

At 18, I taught myself to code while studying ethics, politics, and economics at Yale. Since then, I’ve averaged ~10k commits/year and worked at three YC startups. I wrote my 65-page senior thesis on open-source governance and digital platforms. I care deeply about data ownership, open-source, and interdisciplinary thinking. https://github.com/braden-w/ I build tools to help automate the boring parts of my writing. Hopefully, something good comes from it!

Launch

Launched on Y Combinator · Aug 2025
View launch post ↗

A shared workspace for everything you think, write, and build.

Epicenter launches an open-source, local-first suite of tools, centered on a single memory stored in a folder, including a text editor, CRM, personal assistant, and more. It aims to keep tools interconnected to support interdisciplinary work and preserve data ownership, with epicenter.sh as the first product—a local-first assistant built around plain-text data.

ConsumerSaaSProductivityOpen SourceNote-takingAI Assistant

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