Jan-Kasper Jakubowski

Jan-Kasper Jakubowski

HermitHermit
French-Polish builder | Memory & Health
#133142551 followers26 following
#22,624All time
281 KP

About

French-Polish builder based in Paris. I build at the intersection of AI and deeply personal problems, preserving family stories before they disappear (Tirith), and helping people carry their AI context across platforms (Hermit), and exploring how tech can improve chronic health management. Background: X-HEC Entrepreneurs (Polytechnique × HEC Paris), fullstack engineering, and a brief stint in the YC ecosystem. I run everything through my solo studio, Istari. Outside of building: marathon runner, football fan 🔴🔵, Warhammer painter, amateur theologian, and someone who thinks your grandmother's stories are worth more than most Series A decks.

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Maker History

  • Hermit
    HermitLeave ChatGPT while keeping everything it learned about you
    Mar 2026
    • 🎉
    Joined Product HuntJune 25th, 2018

Forums

Jan-Kasper Jakubowski•

1mo ago

Hermit - Leave ChatGPT while keeping everything it learned about you

Switching LLMs means losing years of context. Anthropic's Import Memory official prompt extracts ~40 stored facts: about 2% of what's in your conversations. Hermit processes your full ChatGPT data export and generates one structured profile per ChatGPT project and recurring theme, with temporal awareness (ACTIVE vs PAST). Ready-to-paste files for Claude Memory, Claude Projects, Gemini Gems, or any LLM. Free analytics. One-shot pricing, not a subscription. Data deleted within 24h.
Claude by Anthropicp/claudeNika•

1mo ago

People are switching from OpenAI to Claude following Sam Altman's announcement today.

TL;DR: Anthropic refused to sign a contract with the Pentagon that would have allowed the U.S. military to use all of its models without restrictions. Anthropic insisted on an exception, and brace yourself, that its models cannot be used: 1) for mass surveillance of citizens, 2) for autonomous killing. Now the administration is threatening that if the founder of Anthropic doesn't change his mind by a certain date, they will come after him.

Google, OpenAI, and Musk (Grok) have all signed the contract.

Following Sam Altman's announcement over the past few hours, people have been speaking out massively about cancelling their OpenAI subscriptions and subscribing to Claude.

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