How Memento compares

“How is this different from Obsidian?” is the first question most people ask, and a fair one. This page answers it for four tools you may already use — starting, each time, with what that tool does better.

Every comparison below comes down to the same three differences, so here they are once:

The agent runs hosted and unattended. Filing, linking and routines happen in a sandbox on our side, so they work from your phone and on a schedule while your laptop is closed.
Changes land as reviewable diffs. Every fact is marked confirmed, inferred or disputed, bigger edits wait in your inbox with a diff, and the whole library is version-controlled, so anything can be undone.
Storage is plain Markdown in a Git repository. Export the pages, the original sources and the full history at any time and read them with no Memento software at all.

What Memento does not do is also worth saying once: it is not local-first, the agent needs several minutes per capture (typically around eight, in two runs), and it is a hosted service you pay for rather than software you install.

Obsidian with Claude Code over the vault

The substitute that comes up on r/ClaudeCode: keep your notes in an Obsidian vault and point Claude Code (or Codex, or any coding agent) at the folder. It is a genuinely good setup, and Memento borrows more from it than from any notes app.

What it does better

Everything stays on your machine. Obsidian keeps notes as Markdown files in a local folder, and Claude Code runs in your own terminal with your own permissions, so nothing about your library ever leaves the laptop unless you sync it. The agent is fully in your hands: you pick the model, the prompts, the tools, and you watch it work. There is no daily run limit but your own budget, and a change is on disk the moment the agent writes it — no queue, no minutes of waiting.

What Memento does differently

Claude Code works while its process runs on your machine. It can be scheduled, but each route has a condition: a cloud routine (a research preview on Pro plans and up, one-hour minimum interval) clones a GitHub repository, so the vault has to live on GitHub and the changes come back as a branch; a Desktop scheduled task runs on your machine, so the machine stays on. From a phone, the Claude app’s Code tab can start a cloud session or remote-control a machine that is already running. Memento’s agent is hosted next to your library, so a share from your phone at the bus stop is filed by the time you sit down, and a routine runs with nothing of yours switched on.

Claude Code edits files in place; with the Obsidian Git plugin you can commit afterwards, but the tool has no notion of a fact being confirmed or merely inferred, and no review step between “the agent decided” and “the file changed”. Memento labels every fact confirmed, inferred or disputed, keeps each capture as a read-only source that the page cites, and holds bigger changes in your inbox as a diff until you approve them — with Git history underneath for the rest.

The storage is the same idea in both: plain Markdown, Git underneath. Memento just does the Git part for you, per account, with its own isolated credentials — and you can export the repository and carry on in Obsidian with Claude Code whenever you like.

Pick Obsidian with Claude Code instead if …

… you want your notes never to leave your machine, you enjoy tuning the agent yourself, or you already have the cron job and a laptop that stays on. Memento is for the person who wants the same result — an agent-maintained Markdown library — without operating it.

Obsidian or Logseq on their own

Without an agent, both are outstanding tools for people who like organising — and that is exactly the split.

What they do better

Both are local-first: Obsidian stores a vault as Markdown files in a folder of your choosing, and Logseq (the file-based edition, now called Logseq OG while the 2.0 beta moves to a database) stores plain-text Markdown or Org-mode files the same way, under an open-source licence (AGPL-3.0). Both work offline, both have desktop and mobile apps, and both let you link pages with [[wikilinks]] and see the backlinks. Obsidian has a community plugin directory in the thousands and a canvas, graph view and built-in databases; Logseq is an outliner where every paragraph is a block and today’s journal is the front door. Both are free to use for personal work; sync is a paid add-on in each. Your editing experience is instant and entirely yours.

What Memento does differently

Neither tool files anything for you. Where a note goes, which page it belongs to, what it links to, and whether last month’s note is still true are your job — AI plugins exist for both, but they run while the app is open, on the device it is open on, when you invoke them. Memento’s agent is hosted and works unattended: you capture from any device, and it distils the facts onto the right pages, links them and keeps the original as a source, on a schedule if you ask it to.

Version history in Obsidian is the File Recovery snapshots (or Sync’s history); Logseq has an opt-in Git auto-commit on desktop. Neither has a review step or a trust label, because there is nothing to review — you made every edit. In Memento a second author is writing into your library, so every fact carries a confirmed / inferred / disputed label, larger edits arrive as diffs in your inbox, and Git undo is always there.

The files are the same shape. A Memento export is a folder of Markdown pages with wikilinks, plus your source files and the Git history, which either app will open.

Pick Obsidian or Logseq instead if …

… organising is the part you enjoy, you want local-only storage, or you want a plugin ecosystem and a canvas today. Memento is for the person whose vault rotted the moment they stopped filing.

Notion AI or Capacities

The hosted alternatives: an app that runs on someone else’s servers, with an AI assistant built in.

What they do better

Notion is a full workspace: databases, real-time collaboration, sharing and permissions, templates, and a team can live in it. Notion AI answers questions across the workspace and connected tools and cites the pages it used, writes and summarises inside a page, fills database properties, and takes meeting notes; on Business and Enterprise plans, Custom Agents run on a schedule or on page events without you. Capacities is object-based (a Person, a Book, a Meeting are typed objects with their own properties), works offline with sync, has native mobile apps with quick capture from your phone, and its assistant summarises, translates and answers inside the app. Both are polished, mature products with far more surface than Memento.

What Memento does differently

The Capacities assistant works when you invoke it, on the text in front of you. Notion’s unattended agents exist, but on the two team plans, paid for in Notion credits on top of the seat; on Free and Plus, Notion AI is a trial. Memento’s hosted agent is on every plan, free included: capture from your phone and it files itself in the background, and a routine runs your prompt on a schedule with the laptop closed. It runs on your own model credential, inside a sandbox with no network access until you approve a destination, so the only model bill is the one you already have.

When Notion AI or the Capacities assistant writes into a page, the result is text in the page. Memento’s agent writes claims with a status — confirmed, inferred, disputed — each citing the read-only source it came from, and its bigger changes wait in your inbox as a diff. Notion keeps page history for a plan-dependent window; Memento’s Git history is complete and yours.

Storage: Notion exports Markdown and CSV, HTML or PDF from its own database; Capacities exports Markdown too. Memento’s pages are Markdown files in a Git repository the whole time — the export is the storage, not a conversion of it.

Pick Notion or Capacities instead if …

… you need a team in the same workspace, databases and shared permissions, or a native mobile app with years of polish behind it. Memento is a single-person library with an agent as its second author.

Claude Projects or ChatGPT memory

“Why not just use the chat app?” The chat apps now remember, and for a lot of people that is enough.

What they do better

Nothing to set up. Claude Projects and ChatGPT Projects let you drop documents and instructions into a project and every chat in it knows them; both apps keep a memory across chats that you can read, edit and switch off, and both can run a prompt for you on a schedule. The models are the best available, the apps are on every platform, and it costs you nothing beyond the subscription you already have.

What Memento does differently

Chat memory is a set of notes the assistant keeps about you — topics in Claude, saved memories plus a summary in ChatGPT — held inside the vendor’s app, and a scheduled task there hands its result to a chat. Memento is a library: a linked wiki of pages you can open, read and edit like documents, that a hosted agent keeps current unattended — filing what you capture from your phone, and running routines on a schedule into that same library while you are away.

A memory entry does not say whether you stated it or the model inferred it, and it does not show you what it replaced. Every Memento page carries a confirmed / inferred / disputed label per fact, cites a read-only source, and shows the agent’s edits as diffs you can review and undo in Git.

And it is yours to leave with. A data export from either chat app gives you your conversations, not the memory or the project files; a Memento export is your library — plain Markdown, your original files, the full history — readable in any editor, with your own Claude or OpenAI credential still the only model bill you pay.

Pick the chat app instead if …

… what you want is a good assistant that remembers your preferences, not a knowledge base you will read and rely on in a year. Memento is for the second thing; it uses the same models to build it.

What Memento is not

Not local-first. Your library lives in a hosted repository and the agent runs in a hosted sandbox. The export is complete, but the working copy is on our side.
Not instant. Filing a capture is agent work — typically around eight minutes, in two runs — and the free plan allows 20 runs a day (see Plans & limits).
Not a team workspace. One account, one person, several spaces. No shared editing.
Not a model. You bring your own Claude, OpenAI or other credential; Memento is the library and the librarian, not the intelligence.

If one of the four above fits you better, use it — the export exists so that switching in either direction is a folder copy, not a migration.