Note-taking and knowledge bases: AI tools compared (14)

What note-taking and knowledge bases tools are for

Note taking and knowledge management tools help you save information, connect ideas and find material again. Depending on the product, AI may support organisation, summaries or answers grounded in your saved content. The category also includes applications focused on arranging notes, whose native functions are not necessarily AI based. It suits people who collect reading material, ideas and working documents over time. Previously, finding an argument in a saved article meant browsing folders or remembering its title. With a suitable service, you can query your collection and return to the relevant material. Open Notebook supports searching documents and notes with cited answers. Obsidian organises Markdown notes and the links between them. The shared purpose is to keep your accumulated knowledge accessible, while allowing you to choose how it is stored, connected and reviewed during your work.

Example uses:

• Save reading notes alongside their sources so you can recover the context behind an idea later.
• Connect notes about the same project to follow topics as they develop throughout your ongoing work.
• Query a document collection to locate a passage without having to remember the original file name.
• Prepare a summary of saved material, then add your own observations and links to the originals.
• Organise project information in a personal or shared notebook according to the features of your chosen service.

Our picks by need

These picks follow simple rules applied to the verified data, with no partnership or affiliate link:

• Best scored : Recall. 78/100 on our access and transparency grid.
• Cheapest paid option : MindMap AI. First plan at $3.99 per month.
• To keep data in Europe : Obsidian. Processing on your device.
• Open source : Open Notebook. Public code, self-hosting possible depending on the project.

The main tools at a glance

Recall 78/100

Recall lets users save articles and videos and summarize videos, podcasts and PDFs. It serves people who want to organize and connect knowledge, query their library through conversation and review content with quizzes. Features: Save articles and videos; Summarize videos, podcasts and PDFs; Categorize content automatically. Entry price: $10 per month, with a free tier. Runs on: web browser, iPhone and iPad, Android, browser extension, and API. Data hosting: Several regions.

Obsidian 73/100

Obsidian helps people write and organize Markdown notes. Users can link notes together, view their connections in a graph, arrange ideas on a canvas, and add functions through extensions. Features: Write and organize Markdown notes; Link notes together; Visualize connections in a graph. Entry price: $4 per month, with a free tier. Runs on: Windows, macOS, Linux, iPhone and iPad, Android, and browser extension. Data hosting: On device.

Glasp 70/100

Glasp helps people keep reading notes and highlight web pages and PDFs. It summarizes YouTube videos, answers questions about saved content, transcribes audio files and synchronizes notes to Notion. Features: Highlight pages and PDFs; Save reading notes; Summarize YouTube videos. Entry price: $150 per year, with a free tier. Runs on: web browser, browser extension, iPhone and iPad, Android, and API. Data hosting: United States.

Open Notebook 68/100

Open Notebook organizes documents into notebooks for people who want to query and search their sources. It provides cited answers, summarizes content and creates podcasts with multiple speakers. Features: Organize documents into notebooks; Query sources with cited answers; Search documents and notes. Free tier available. Runs on: web browser, Windows, macOS, Linux, and API. Data hosting: On device.

Mem 65/100

Mem helps users save notes and web pages and retrieve information by asking questions. It also transcribes and structures meetings, identifies tasks in notes, and prepares recurring reminders and searches. Features: Save notes and web pages; Find information by asking a question; Transcribe and structure a meeting. Entry price: $9 per month, with a free tier. Runs on: web browser, iPhone and iPad, browser extension, and API.

Reflect 65/100

Reflect lets people taking notes link them together and ask questions with sourced answers. It also summarizes meeting highlights, improves and corrects text, and captures pages and audio memos. Features: Link notes together; Ask questions about your notes with sourced answers; Summarize the key points of a meeting. Entry price: $99 per year, with a free tier. Runs on: macOS, iPhone and iPad, and browser extension. Data hosting: On device.

Limitless 63/100

Limitless lets pendant users transcribe and summarize their recorded conversations. They can search their history for information, ask questions based on their conversations, and retrieve transcripts and recordings. Features: Transcribe conversations recorded with the pendant; Summarize recorded exchanges; Search your history for information. Free tier available. Runs on: web browser, Windows, macOS, iPhone and iPad, and API. Data hosting: United States.

Elephas 58/100

Elephas lets macOS users query a knowledge base built from their files and find passages supporting answers. It supports local model responses, personal information masking before cloud requests, and team sharing. Features: Query a knowledge base built from your files; Find passages that support an answer; Read PDFs, office documents, and notes. Entry price: $19 per month, with a free tier. Runs on: macOS. Data hosting: On device.

Fabric 58/100

Fabric lets individuals and teams collect notes, links, and files in shared spaces. It provides search by meaning, audio and video transcription, and an assistant that answers questions about their documents. Features: Bring together notes, links, and files; Find content by its meaning; Transcribe audio and video recordings. Entry price: $96 per year, with a free tier. Runs on: web browser, iPhone and iPad, Android, macOS, browser extension, and API.

MindMap AI 53/100

MindMap AI helps people organize knowledge by turning topics, documents and recordings into mind maps. Users can develop branches through conversation, edit nodes manually and share maps. Features: Turn a topic into a mind map; Summarize documents and recordings as a map; Expand or reorganize branches through conversation. Entry price: $3.99 per month, with a free tier. Runs on: web browser, iPhone and iPad, Android, and browser extension.

The category in figures

Of the 14 tools in the category, 12 (86%) offer a free tier, 50% have a public API and 5 have a French interface. The median entry price, per month, is $9 (across 11 tools with a published price). 9 disclose where data is hosted, 4 of them in Europe or on device.

Also useful

These tools belong to another category but also cover this need:

• Otter.ai Otter.ai transcribes meetings live, distinguishes speakers and summarizes discussions. It serves people who wa
• Pieces Pieces lets people working on computers retain activity context and find information by topic or date. It summ
• ClickUp ClickUp helps project teams organize tasks and deadlines. It supports project boards and diagrams, document wr
• Snipd Snipd lets podcast listeners hear episodes with transcripts and save passages using their headphones. It summa
• Fireflies.ai Fireflies.ai helps people transcribe and summarize their meetings. It lets users identify action items, search
• Jamie Jamie supports meeting participants by transcribing conversations and producing structured meeting notes. It i
• Scribe Scribe turns procedures performed on screen into illustrated guides for people documenting their work. It writ
• Superhuman Docs Superhuman Docs helps people working on collaborative documents build tables from a request. It also supports
• Msty Msty lets people using local or remote models chat with them and ask questions about their documents. It also
• genei genei lets people working with documents summarize PDFs and web pages and search for answers across documents.
• Granola Granola helps users and their teams during meetings by transcribing conversations and supplementing their note
• Whimsical Whimsical helps people represent ideas and interfaces through flowcharts, mind maps, and editable wireframes.

Choosing well and avoiding pitfalls

Start with how you want to work: local notes, a hosted library or a shared workspace. Test search on your own material and inspect references attached to answers. Check French support where relevant, import formats and links between notes. Export should preserve text, attachments and structure well enough for future use elsewhere. Review connections to your reading and working tools. For sensitive notes, examine hosting, access and deletion arrangements. Finally, distinguish included functions from those requiring a subscription or a separate AI service, and assess the maintenance your chosen setup will require.

Automatic organisation may obscure your own working logic, while summaries can remove a note’s original context. Answers may connect ideas without explaining the basis for that connection. Keep sources and distinguish your observations from generated text. Test exports before building a large collection. Extensions and connected services may receive additional data, so review their permissions. Maintain a suitable backup and avoid collecting personal details without a clear purpose or a reason to retain them.

To compare with the cost of using an AI model directly, see the API price calculator.

Free or paid?

Free versions generally support writing notes and trying selected search, organisation or summary functions. Synchronisation, storage and AI access may follow separate terms. Paying becomes useful when you need recurring assisted work, a shared workspace or access across your devices. Check whether the subscription covers the complete workflow or whether connected services introduce additional charges.

Tools in the category with a free tier: Recall, Obsidian, Glasp, Open Notebook, Mem, Reflect, Limitless, and Elephas.

For which jobs?

The profiles that use these tools most, based on the use cases documented by publishers: students, researchers, project managers, content writers, small business owners, and freelancers.