Memdex is a Chrome extension that turns every AI conversation into reusable memory. It auto-captures your chats across ChatGPT, Claude, and Gemini, stores them encrypted on your laptop (IndexedDB, never uploaded), and underlines reusable context in your next prompt like Grammarly underlines typos. One click to inject when you need it just like grammarly. Free for your 10 most recent chats. Pro for unlimited.
Hey Product Hunt 👋
I'm Andrew. After spending most of last year jumping between ChatGPT, Claude, and Gemini, three things wore me down:
1. Every new chat starts at zero. I keep re-explaining the same project, the same constraints, the same voice.
2. My "memory" lives in someone else's cloud — locked to one model, invisible, unmovable.
3. The existing fixes are heavier than the problem: vector DBs, accounts, settings panels, prompts called /remember.
So I built Memdex.
Memdex is a browser extension that does three things, automatically:
• Saves every chat on ChatGPT, Claude, Gemini, Perplexity, and Grok to encrypted files on your laptop. Never uploaded, never trained on.
• Detects when something you already discussed is relevant to what you're typing now — like Grammarly, but for context.
• Injects that memory into any AI tool with one click. No copy-paste. No re-explaining.
The aha is the second tab: you open a fresh Claude window and it already knows your project, because last week's ChatGPT thread is on your disk and Memdex just pulled it in.
It's local-first (memory never leaves your machine), cross-model (one memory, every tool), and zero-ritual (no /remember, no DB, no signup to start). Free tier auto-saves your 10 most recent chats; Pro is unlimited.
👉 Add to Chrome: https://chromewebstore.google.co...
👉 Site: https://memdex.ai
What I'd love feedback on:
- Where "detect" feels noisy vs. genuinely useful
- Which tools you want next (Cursor, Windsurf, v0, Lovable are on the list)
- Anything that makes you not believe "local-first" — I want to fix the perception, not just the reality
Building in public from here — happy to answer anything in the thread.
— Andrew
Interesting product. One thing I’m curious about from a technical standpoint though, I’m guessing Memdex relies on scraping data from ChatGPT/Claude/Gemini web apps, doesn’t that become fragile over time?
I built a small chrome extension for myself a while ago that scraped linkedin job descriptions, and it kept breaking whenever linkedin changed their dom structure. From what I have seen, a lot of companies intentionally change frontend structures specifically to make scraping harder.
Did you think about this problem while building Memdex? Curious how you’re making the integrations stable long-term.
First of all congrats on your launch! I just checked your website and landing page storytelling is great which is usually first thing that caught my eye in any new tool and something i spent good time to deliver it in my own tool as it is the first impression for any new user. I use Claude a lot and many times it misses the past convos even though i ask it to update the memory but in fact it still repeats the same old information. Does Memdex helps solving this issue?
"Reusable local memory" is the part most AI tools paper over with "your data is private" wording without actually solving the locality problem. Curious which decision was harder — the storage shape or deciding what NOT to capture. That second one usually defines how a memory tool ages.
The Grammarly-for-context framing is strong. The place I’d be careful is separating durable memory from stale task state.
Some things really should follow me everywhere: product constraints, preferred wording, customer language, recurring project facts. Other things are only useful for this week’s thread and become confusing later. I’d love a lightweight way to mark injected context as “keep reusing this” vs “only for this task/session,” plus a small preview of why Memdex thinks a prior chat is relevant before it inserts it.
I literally had a discussion with Claude about this and few days ago and wanted to build something.
No the issue remains: how do I get my mobile conversations tracked as well?
Hey Andrew! Sounds obvious but it actually isn't. Also jumped between all of them and know how hard is to set again the context. I'm sure ti's gonna change the game. Wish you all the best!
Reusable conversational memory is one of the biggest unlocks for practical AI workflows.
I just woke up and opened Product Hunt to see what’s launching today. Memdex caught my eye so I went through the homepage, and the way you described the context detection flow felt clean. Great work! By the way I lose my best AI chats all the time. Scrolling through the history is a nightmare. So this idea... I like it. I have a question though. Since everything stays on my device, how does the matching actually work? Is it just looking for the same words, or does it understand the meaning behind them? Either way, cool product. Rooting for you.
About Memdex on Product Hunt
“Turn every AI conversation into reusable local memory”
Memdex launched on Product Hunt on May 23rd, 2026 and earned 178 upvotes and 22 comments, earning #2 Product of the Day. Memdex is a Chrome extension that turns every AI conversation into reusable memory. It auto-captures your chats across ChatGPT, Claude, and Gemini, stores them encrypted on your laptop (IndexedDB, never uploaded), and underlines reusable context in your next prompt like Grammarly underlines typos. One click to inject when you need it just like grammarly. Free for your 10 most recent chats. Pro for unlimited.
Memdex was featured in Productivity (652.2k followers) and Artificial Intelligence (469.2k followers) on Product Hunt. Together, these topics include over 229k products, making this a competitive space to launch in.
Who hunted Memdex?
Memdex was hunted by Andrew chan. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
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Andrew chan