ContextBolt vs Memex · an honest comparison

ContextBolt vs Memex

Memex is a research desk you set up. ContextBolt is a net you leave out.

Basic is free · no account, no card · capped at 150 bookmarks
Bookmarks MCP server for Claude, Cursor & Codex Claude Desktop · ContextBolt connected example library
What did I save about rate limiting?
Used search_bookmarks
Token buckets beat fixed windows for bursty trafficX · @dan_abramov
How we rate limit 40k req/s on one boxReddit · u/pgstash
Rate limiting is a product decision, not a configPriya Patel
Searched 847 saves across X, Reddit and LinkedIn

Web pages and social saves in one library. On Pro, your agent searches it without you leaving the conversation. Example exchange.

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Here is the verdict.

ContextBolt is the better fit if the useful thing is usually something you saved in passing rather than a document you sat down to study. It captures your X, Reddit and LinkedIn saves automatically, keeps the text of any page you save, tags everything with AI, and on Pro your agent searches the library by meaning. Memex is a research desk, with inline annotation, shared spaces and Obsidian and Readwise sync for the pages you sit down to study. Basic is free. Pro is $6 a month.

Where ContextBolt wins
  • It fills itselfMemex holds what you deliberately annotated or filed into a space. ContextBolt captures the saves you make on X, Reddit and LinkedIn, so the library grows without you thinking about it.
  • No spaces to design firstAI tags every save on arrival and clusters it into topics. You do not choose a structure before you have anything to put in it.
  • It answers your agentPro exposes the whole library over MCP, so Claude or Codex can pull the source you saved while you are drafting, rather than after you have gone looking.
What Memex is built for
  • Annotation and shared spacesInline highlights and notes on a live page, plus collaborative spaces, for the pages you study deliberately. ContextBolt keeps the article text of every save instead, so the useful paragraph is findable later, marked or not.
  • Obsidian and Readwise syncMemex pushes into an existing note-taking setup. ContextBolt's route into other tools is MCP on Pro, so your agent reads the library directly rather than a copy being pushed anywhere.

Here is every feature side by side.

FeatureContextBoltMemex
X, Reddit and LinkedIn saves Captured as you save them, nothing to resave (ahead) Save each one yourself
Getting organized AI tags and topic clusters, applied on arrival (ahead) Tags and spaces you set up
Finding it again Ranked local search over text and tags. Pro adds semantic search over MCP (ahead) Full-text keyword search across saved pages and annotations
Annotating a live page Not a markup tool. Keeps the article text so search finds the paragraph later Inline highlights and notes
Feeding your notes app MCP on Pro. Your agent reads the library directly Syncs to Obsidian and Readwise
Inside Claude, Cursor or Codex MCP endpoint on Pro (ahead) Copy and paste, unless your agent has its own route in
Price Basic free, Pro $6/month Free core, paid sync. Check current terms

ContextBolt ahead on that row

What each one costs.

ContextBolt Basic (free) + $6/month Pro AI search, MCP endpoint, social bookmarks
Memex Free core + paid sync (check current terms) View pricing

The longer story.

Memex is a serious research tool. Annotate a live page, gather sources into spaces, search the full text of everything you saved, push it all into Obsidian. It is built by people who clearly do a lot of reading.

It also assumes you are going to set something up. Spaces, tags, a sync target. That assumption is where most people fall off, including me. ContextBolt assumes nothing. Save the way you already do and the library builds itself.

Structure only helps what made it in

Every organized library has the same failure. The system works perfectly on the twenty pages you consciously filed, and does nothing about the four hundred things you saved in a hurry and never touched again.

The four hundred are where the useful stuff hides. A Reddit reply where somebody describes exactly the edge case you are about to hit. An X thread with the pricing table you wanted. A LinkedIn post you kept because the structure was good.

ContextBolt goes after those. It captures the saves you make on X, Reddit and LinkedIn, so they arrive without a second step. Web pages save in one click with their article text. Then AI tags every one of them by topic, so there is no structure to design and nothing to keep up with.

Search that does not need your filing to have been good

Memex searches the full text of what you saved, which is genuinely strong. It still needs you to remember something the page actually said.

ContextBolt searches the text and the AI tags together, on your machine. So “migration rollback” surfaces the thread that only ever said “we had to put it back at 3am”. You are searching what the thing was about rather than what it happened to say.

On Pro that same search runs inside Claude or Codex over MCP. You ask for what you saved about rollback problems while you are already writing the migration plan, instead of stopping to go and find it.

What it costs

ContextBolt Basic is free with no clock on it and capped at 150 bookmarks. Pro is $6 a month, no annual plan, and removes the 150 cap and adds cloud sync and the MCP endpoint.

Memex has a free core with paid sync. We have not verified its current checkout price and are not going to invent one, so check the terms for the plan you would be on. The bookmark manager pricing guide covers the tools whose prices we have confirmed.

Where Memex still fits

Memex is for deliberate study. Annotating a live page, gathering sources into shared spaces, and pushing all of it into Obsidian or Readwise so your notes app stays the center of the system. That is its job and it is built by people who do a lot of reading.

It is not the job most saving is. ContextBolt is not a markup tool, has no Memex importer and runs in desktop Chrome, and it is built for the four hundred things you saved in passing and never filed. Keep an annotated archive exactly where it is, and start ContextBolt free on your next save.

The test

Install it and save nothing differently for a week. Do not build a structure, because there is nothing to build.

On day eight, look for something you half-remember. If the library found it without you having filed it anywhere, that is the whole argument. Start free with ContextBolt Bookmarks, or read the AI bookmark managers roundup for the wider field.

Common questions.

What does Memex cost?

The core is free with paid sync on top, and we have not verified its current checkout price, so we are not going to print one. Check the terms for the plan you would actually be on. ContextBolt Basic is free and Pro is $6 a month with no annual plan.

Does ContextBolt annotate pages?

No. It is not a markup tool, so there are no highlights, inline notes or shared spaces. It saves a page with its article text so search works and the save outlives the original, which means the useful paragraph is findable later whether or not you marked it at the time.

I already use Obsidian. Does ContextBolt sync to it?

No. Pushing pages into Obsidian is Memex's job. ContextBolt's route into other tools is MCP on Pro, which means your agent reads the library directly, including the social saves that never made it into your notes, rather than a copy being pushed anywhere.

Why is automatic capture worth more than a tidy structure?

Because structure only helps what made it in. Spaces and tags work beautifully on the twenty pages you consciously filed and do nothing for the four hundred things you saved on your phone in a hurry. ContextBolt is aimed at the four hundred.

Can I move my Memex data across?

No, there is no importer. Leave it alone. Run ContextBolt on new saves for a couple of weeks and judge it on what turns up in the library that you never would have filed by hand.

One install.
Every save, findable.

Free up to 150 bookmarks. Pro removes the cap and adds the AI connection, for $6 a month.

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