
ChatGPT
Claude AI
LLM OneStop
Stop losing answers in AI chats. LLMnesia indexes conversations across ChatGPT, Claude, Gemini and more so you can find old prompts, answers, ideas, and decisions instantly. All local, nothing leaves your machine.

The modern platform for creating, sharing, and collaborating on AI prompts. Advanced version control and real-time testing.

Website, pricing, platforms and company facts side by side.
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| Website | llmnesia.com | diffyn.com |
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| Company | Startup from Thailand · 1 - 9 employees · 2026 | — |
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In their own words, as submitted to SaaSHub.


LLMnesia is a Chrome extension that helps you search, rediscover and reuse your AI conversation history across tools like ChatGPT, Claude, Gemini and other major LLM platforms. As AI becomes part of everyday work, more and more valuable knowledge gets buried inside old chats: useful answers,...
No description of Diffyn yet.
What each product offers, as listed by its team.


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The Ultimate Prompt Tool for Creators – Visualize & Organize with Diffyn
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As answered by people managing LLMnesia and Diffyn.
LLMnesia's answer
LLMnesia turns scattered AI chat history into a searchable personal knowledge base. Instead of losing useful answers across ChatGPT, Claude, Gemini and other LLM tools, it indexes your past conversations locally in a Chrome extension so you can search, revisit and reuse what you have already learned or created.
Diffyn's answer:
Addresses workflow and change management on LLM prompts, provide teams with traceability and visualization of tests across multiple models, provide deeper understading into efficiency of these prompts.
LLMnesia's answer
Most AI tools focus on creating new conversations. LLMnesia focuses on recovering the value already locked inside your existing conversations. It is lightweight, browser-based, privacy-conscious, and designed for people who use multiple AI platforms rather than just one. The goal is simple: stop repeating prompts, stop losing good answers, and make your AI history genuinely useful.
Diffyn's answer:
Diffyn is the platform that specializes on both change management and multi-model analysis.
LLMnesia's answer
LLMnesia is built as a Chrome extension using modern web technologies, including JavaScript, browser extension APIs, local indexing and search, and integrations with major LLM web platforms. The wider product ecosystem also uses Next.js, TypeScript and Supabase for supporting web and analytics tooling.
Diffyn's answer:
React, Next.js, POSTGRESQL
LLMnesia's answer
LLMnesia is for heavy AI users who rely on LLMs for work, research, writing, coding, product building, learning or decision-making. The main audience includes founders, developers, researchers, writers, consultants, students and anyone who has valuable information buried across many AI chats.
Diffyn's answer:
Professionals incorporating LLMs or AI tools in their workflow and wants to keep track of changes and test their prompts.
LLMnesia's answer
LLMnesia started from a real frustration: after using AI tools intensively, the useful answers, ideas, code snippets and decisions were scattered across different platforms and hard to find again. The product was built to solve that problem directly by making AI conversation history searchable, reusable and easier to manage. It grew from a personal need into a tool for anyone who depends on LLMs every day.
Diffyn's answer:
I started working on Diffyn when I notice that prompting has become an essential part of work across many industries. While there are version control platofrms like github, they are not designed for just prompt management are can be overkill such applications, it is also not integrated natively with various LLMs and relevant tools for users to validate ideas and visualise results properly.
LLMnesia's answer
LLMnesia is still an early-stage product, so there are no major public enterprise customers to list yet. Current users are individual AI power users, builders, developers, researchers and founders.
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External articles and on-site reviews we used to compare the two products.


Recently used this to find chats on same subject but spread over ChatGPT, Claude, Deepseek, Perplexity. Claude Code support is also very cool.
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