Notes & Knowledge Base Tools

Best Notes & Knowledge Base tools by public signals

These picks are computed from scored public evidence. Use the openness column in the ranking to separate OSI-approved, source-available, open-core, proprietary, and unverified-license tools.

Best overallUnderstand Anything94 score License-safe pickUnderstand AnythingOSI-approved OSS Fastest shippingUnderstand Anything95 shipping

Use Case Rankings

Ordered by ToolVitals score, health, shipping, confidence, and then adoption as a tie-breaker.

#	Tool	Health	Shipping	Openness	Stars	Score	Status
01	Understand Anything Interactive knowledge base for code and documents.	93	95	OSI-approved OSS	57.5k	94	Active
02	Anarlog Open source Granola AI alternative.	87	95	OSI-approved OSS	8.6k	92	Active
03	Atomic Self-hosted, semantically connected personal knowledge base.	87	95	OSI-approved OSS	1.5k	92	Active
04	Spool Local search for Claude Code sessions, Codex history, GitHub stars, and other developer knowledge sources.	84	95	OSI-approved OSS	558	92	Active
05	Butterfly Powerful, minimalistic, cross-platform, opensource note-taking app.	83	95	OSI-approved OSS	1.9k	90	Active
06	Minutes Privacy-first conversation memory layer with AI search.	83	95	OSI-approved OSS	1.3k	90	Active
07	Knowledge Base Local-first knowledge base desktop app with Markdown editing, full-text search, knowledge graphs, and sync support.	83	93	License unknown	262	89	Active
08	Eidos An extensible framework for Personal Data Management.	79	93	OSI-approved OSS	3.1k	89	Active
09	Poznote Personal note-taking and documentation platform.	81	95	OSI-approved OSS	615	88	Active
10	OpenWriter Markdown-native writing surface for AI agents.	77	93	OSI-approved OSS	14	88	Active
11	note-gen Cross-platform Markdown AI note-taking software.	87	78	OSI-approved OSS	12.1k	86	Active
12	Trilium.cc Personal knowledge base	86	77	OSI-approved OSS	36.4k	86	Active
13	Clearly Markdown editor and knowledge base for Mac, iOS and iPadOS.	77	89	OSI-approved OSS	1k	86	Active
14	massCode Open-source developer workspace for snippets, notes, calculations, and dev tools.	79	82	OSI-approved OSS	6.8k	85	Active
15	Standard Notes Think fearlessly with end-to-end encrypted notes and files. For issues, visit https://standardnotes.com/forum or https://standardnotes.com/help.	84	71	OSI-approved OSS	6.5k	84	Active
16	Athenaeum Open source knowledge management pipeline.	71	84	OSI-approved OSS	9	82	Warning
17	Lumina Note Markdown note-taking app with live preview, bidirectional links, and AI assistant.	67	93	OSI-approved OSS	873	79	Warning
18	FSNotes Notes manager for macOS/iOS	80	46	OSI-approved OSS	7.4k	72	Warning
19	TiddlyWiki A self-contained JavaScript wiki for the browser, Node.js, AWS Lambda etc.	74	52	License unknown	8.6k	72	Warning
20	TidGi Desktop Privacy-in-mind knowledge management desktop note app with auto Git backup and web-clipping support.	76	45	OSI-approved OSS	2k	71	Warning
21	BaseBlocks Multi-tenant site builder for docs, knowledge bases, and internal portals.	57	35	OSI-approved OSS	13	58	Warning
22	DevLune Voltex Notes Open-source knowledge base with graph view, markdown editing, cloud sync and plugin ecosystem.	52	39	OSI-approved OSS	2	57	Warning
23	Lokus Modern note-taking application with powerful editing capabilities.	60	13	OSI-approved OSS	712	55	Warning
24	Ephe Ephemeral markdown paper for plain Markdown users.	59	18	OSI-approved OSS	578	53	Warning
25	GitJournal Mobile-first note-taking app integrated with Git.	54	18	OSI-approved OSS	4.2k	51	Warning
26	AirDesktop AI-powered note-taking desktop app.	49	20	OSI-approved OSS	0	51	Critical
27	notes Fast and beautiful note-taking app written in C++.	54	14	OSI-approved OSS	4.2k	50	Warning
28	Lydie Modern writing workspace for structured documents, notes, and knowledge.	41	17	OSI-approved OSS	42	46	Critical
29	Bangle Web-only WYSIWYG note-taking app that saves notes locally in Markdown.	46	7	License unknown	1.2k	45	Critical
30	dnote Simple command-line notebook.	46	7	OSI-approved OSS	3k	45	Critical
31	ZeroNote Offline-first encrypted note-taking and secrets manager.	43	11	License unknown	51	44	Critical
32	inAI wiki Open-source AI knowledge base and directory.	36	23	License unknown	52	44	Critical
33	MyNoteBookLm Open-source note-taking and podcast generation app.	38	17	License unknown	0	42	Critical
34	Noeko Self-hostable intelligent knowledge base.	35	11	OSI-approved OSS	6	41	Critical
35	Notabase Powerful and easy-to-use note-taking app for networked thinking	41	0	OSI-approved OSS	905	39	Critical
36	Memex Browser extension to curate, annotate, and discuss web content.	36	0	License unknown	4.7k	39	Critical
37	Nexus Lightweight open-source knowledge base program.	35	7	License unknown	0	39	Critical
38	LocalizeAI App that fetches and summarizes Gmail newsletters for an AI community.	28	0	OSI-approved OSS	5	35	Critical
39	CanvyDocs Open-source Miro alternative for collaborative docs and boards.	33	0	OSI-approved OSS	126	34	Critical
40	Dendron Knowledge base plugin for VS Code	31	0	OSI-approved OSS	7.4k	33	Critical
41	Revezone Local-first graphic-centric productivity tool for notes and whiteboards.	31	0	OSI-approved OSS	2.6k	32	Critical
42	Clarity Modern open-source note-taking and workspace application inspired by Notion.	24	0	OSI-approved OSS	4	32	Critical
43	Docs Live Collaborative document editing platform.	24	0	License unknown	1	31	Critical
44	PGuide Docs Open-source knowledge base for CS self-study and development.	27	0	OSI-approved OSS	14	29	Critical
45	Docs Page Demo Documentation platform for creating fast and responsive docs sites.	19	0	License unknown	1	29	Critical
46	Maila A Gatsby and Node.js powered app that uses OpenAI to make writing faster and more efficient.	23	0	OSI-approved OSS	6	27	Critical
47	Omni-Notes Open-source note-taking application for Android.	14	0	OSI-approved OSS	2.8k	25	Critical
48	Liha Local-first second brain for knowledge capture and retrieval.	3	0	License unknown	31	20	Critical

Evidence Watch

Tracked tools with useful public signals but no verdict score yet.

Notesify

Cross-platform AI-powered note taking app.

73 confidence