Best Personal Knowledge Base Products in 2025

A note-taking tool for networked thought

a non-linear personal web notebook

Open Source

A second brain, for you, forever. Obsidian is a powerful knowledge base that works on top of a local folder of plain text Markdown files.

Logseq is a local-first, non-linear, outliner notebook for organizing and sharing your personal knowledge base.

Open Source free

A powerful note-taking tool. All your ideas – typed and connected.

Bring your life's work together in one digital workspace. Evernote is the place to collect inspirational ideas, write meaningful words, and move your important projects forward.

All-in-one workspace. One tool for your whole team. Write, plan, and get organized.

Get the OneNote app for free on your tablet, phone, and computer, so you can capture your ideas and to-do lists in one place wherever you are. Or try OneNote with Office for free.

ConnectedText is a powerful but simple information management system.

Learning Management Solutions provides innovative and reliable software for the knowledge worker.

wikidPad is an application for storing thoughts, ideas, todo lists, contacts, or anything else that user can think of to write down.

Open Source

The fastest way to take notes and collaborate with friends. Create notecards with Markdown, LaTeX, images, emojis and more. Get started for free!

freemium

Your personal search engine for your bookmarks