Mem is a note-taking app built on the argument that filing notes is wasted effort — you write, and AI handles connection and retrieval instead of asking you to maintain folders and tags. It's a genuinely interesting bet from an a16z-backed team, and the honest position in 2026 is that the thesis works better for capture than for structure. Paid access has been reported around $14.99 a month with a free tier, though this is a smaller product than Notion or Obsidian and pricing warrants checking directly rather than trusting any comparison page.
Reviewed by EdGrows·Updated Aug 18, 2026Affiliate link — we may earn a commission
This analysis is based on documentation, public user reports, and vendor materials — not yet on our own hands-on testing. How we rate
Every note app before this one assumed you'd do the filing. Folders, tags, links, a naming convention you'd stick to.
Almost nobody does. Notes accumulate unfiled, tags get applied for two weeks then abandoned, and the elaborate system built in January is untouched by March.
Mem's argument is that this is the app's failure rather than the user's: organisation should be the AI's job. You write, it connects and surfaces, and you never think about where anything goes.
That's a genuinely good observation about how people actually behave, and it's the reason the product is interesting even where it's incomplete.
Capture. Getting something out of your head and into the app without first deciding where it belongs removes real friction — and friction at capture is why most notes never get written.
Retrieval by meaning. Asking for what you wrote about a topic works more often than remembering which folder you chose eight months ago. Semantic search over your own writing is straightforwardly better than hierarchy for finding things.
Serendipitous connection. Surfacing a related note you'd forgotten is the pleasant version of an AI feature — occasionally useful, never demanded.
For someone with hundreds of unfiled notes scattered across three apps and a low-grade guilt about it, this is a product built precisely for them.
Deliberate structure. Sometimes you need a document organised a particular way, or a project with defined sections. An emergent system can't be pointed at a shape you already have in mind, and that's a real limitation rather than a missing feature.
Debuggability. When retrieval fails, there's nothing to inspect. A folder structure that doesn't surface something can be examined; an AI connection that didn't fire can't. That's an uncomfortable position for material you actually depend on.
Portability. Notes live in Mem's cloud rather than as files you hold. For this month's meeting notes that's irrelevant. For a decade of accumulated thinking it's the thing worth checking before you commit — confirm the export path rather than assuming it.
Mem is a notes app, not a workspace.
Notion AI does databases, documents, project management and team collaboration with AI layered on. Obsidian gives you local markdown, manual linking and a plugin ecosystem deep enough to build any system you can describe.
Mem does capture and retrieval, well, and stops there. That focus is defensible — trying to be Notion would dilute the one idea it's built around — and it means the comparison isn't really feature-for-feature. It's whether you want a system you maintain or one that maintains itself.
It's also a smaller product than either. It gets less coverage, ships fewer integrations, and sits in a category with well-funded incumbents. Backing from Andreessen Horowitz signals conviction; conviction isn't the same as durability, and for years of notes that's worth a thought.
You already have a working system. Mem solves a problem you've solved.
Project and document structure. Notion AI is the tool for that.
Local files and full control. Obsidian, unambiguously.
Team knowledge management. Different category — Glean indexes organisational knowledge across systems.
Against Notion AI: Notion is a workspace with AI added; Mem is notes with AI as the organising principle. Notion is far more capable and asks you to build the structure. If you want one place for everything, Notion. If you want somewhere to think without maintaining a system, Mem.
Against Obsidian: Obsidian is the philosophical opposite — local markdown files, manual links, complete ownership, and all the work is yours. People who enjoy tending a knowledge graph find Obsidian satisfying; people who find it a chore are Mem's actual market.
Against NotebookLM: NotebookLM reasons over documents you upload rather than notes you write. Adjacent and genuinely different — research assistant versus personal knowledge base.
Against Granola: Granola captures meetings specifically. Some people use a meeting tool and a notes tool together rather than choosing.
Against ChatGPT: ChatGPT with memory covers a surprising amount of casual capture-and-recall, and many people never adopt a notes app because of it. Worth acknowledging as the real competitor for a lot of users.
| Plan | Reported |
|---|---|
| Free | Available |
| Paid | ~$14.99/month |
Checked August 2026 — with a caveat. Mem is a smaller product than the major note and workspace apps and receives less pricing coverage from the comparison sites that track this category, so the figure above should be treated as indicative rather than verified. Confirm current plans and, importantly, the export path on mem.ai before committing notes you intend to keep.
Test it against your actual habits, not your intended ones. The question is whether you organise, not whether you plan to.
Check the export path first. For a notes app, being able to leave with your content is the practical protection.
Don't expect a workspace. Documents, databases and projects belong in Notion.
Use the free tier properly. A fortnight of real capture tells you whether the model suits how you think.
Mem is built on a good observation: most people never organise their notes, and blaming them for it hasn't produced better note-taking. Letting AI handle connection and retrieval instead of demanding folders and tags removes friction exactly where friction stops notes being written at all. For someone with hundreds of unfiled fragments and a recurring intention to sort them out, the pitch is honest and the product is aimed squarely at them.
The thesis works better for capture and retrieval than for structure. When you need a document organised a particular way, an emergent system can't be directed. And when retrieval fails there's nothing to inspect — no folder to check, no reason you can see for why a connection didn't surface — which is uncomfortable for material you rely on.
Two practical considerations sit alongside. Notes live in Mem's cloud rather than as portable files, which matters more the longer you use it, so verifying the export path early is sensible. And this is a smaller product in a category holding Notion and Obsidian — a16z backing signals conviction rather than guaranteeing longevity.
For people who capture constantly and file nothing, recommend testing on the free tier and being honest about the result. For anyone with a system that already works, or who needs project structure and documents, Notion or Obsidian remain the stronger choices.
Note: Mem.ai does not currently have an affiliate program with AIVario. We earn no commission, and this rating carries no commercial incentive.
Best for: Heavy capturers who never organise, people who abandoned their last folder system, semantic search over your own writing, quick thinking-and-recall workflows Not ideal for: Deliberate document structure, project and database work, users wanting local file ownership, anyone already happy with their current system Bottom line: A real idea executed narrowly — excellent at removing the filing you were never going to do, and no substitute for a workspace when you actually need structure.
There's a free tier, with paid access reported around $14.99 a month. Mem is a considerably smaller product than Notion or Obsidian and gets less pricing coverage from the comparison sites that track this category closely, so the figure should be verified on mem.ai directly rather than taken from any secondary source — including this one. The free tier is the sensible way to test whether the approach suits you before the price matters.
That organisation is the AI's job rather than yours. Traditional note apps ask you to create folders, apply tags and link things manually — work that compounds and that most people abandon within a month. Mem's model is that you write, and retrieval happens through AI search and automatic connections instead of through a structure you maintain. Whether that's liberating or unsettling depends heavily on how much you trust a system you can't see.
Better for capture than for structure, which is the honest summary. Throwing things in without deciding where they go removes real friction, and AI retrieval finds them again more often than folder-hunting does. Where it's weaker is when you need deliberate structure — a project with defined sections, a document that has to be organised a particular way — because an emergent system can't be pointed at a shape you have in mind.
Different products despite overlapping. Notion is a workspace — databases, documents, project management, team collaboration — with AI added on top. Mem is a notes app where AI is the organising principle. If you want one place for docs, projects and wikis, Notion is far more capable. If you want somewhere to think and capture without maintaining a system, Mem's argument is stronger and its scope is much narrower.
Opposite philosophies about who does the work. Obsidian gives you local markdown files, manual linking and complete control, with a plugin ecosystem that lets you build exactly the system you want — and it expects you to build it. Mem does the connecting for you and stores notes in its cloud. People who enjoy tending a knowledge graph choose Obsidian; people who resent it choose Mem.
Two worth weighing. You can't see why the system connected what it connected, so when retrieval fails there's no folder structure to fall back on and no way to debug it. And your notes live in a cloud product rather than as portable files, which matters more for a decade of accumulated thinking than for this month's meeting notes. Obsidian's local markdown is the direct answer to both concerns, at the cost of doing the work yourself.
It's a smaller, venture-backed product in a category with well-funded incumbents, which is a reasonable thing to weigh rather than a prediction. Backers including Andreessen Horowitz signal conviction, and conviction isn't durability. For notes you expect to keep for years, check the export path before committing — being able to leave with your content is the practical protection, and it's worth confirming rather than assuming.
People who capture constantly and organise never. If you have hundreds of unfiled notes across three apps and a recurring guilty feeling about it, Mem is aimed precisely at you and the pitch is honest. If you already maintain a system that works — folders you use, tags you apply, a Notion setup you like — Mem removes a problem you've already solved and gives up capability in exchange.
Anthropic's AI for deep reasoning, long documents, and writing that doesn't sound like AI.
AI meeting recorder for Zoom, Google Meet, and Teams. Unlimited free recording; AI summaries capped at 5/month on the free tier.
Deepest Workspace integration and the best-value $20 subscription, provided you need the Google ecosystem. Free tier context is small.