SiYuan

SiYuan is ranked #3 of 219 in note-taking apps on The Geeks Club. It runs on Android, Browser extension, iOS, Linux, macOS, Self-hosted, Web, Windows. There is a free plan. A free trial is offered. Paid plans start at $64/mo.

SiYuan plans and pricing

All plans

Free Free $0 Lifetime Basic functions · Local storage b3log.org · 4 Oct 2026

PRO Features $64/mo Pay once, use for life; third-party storage is not included Basic functions · Third-party S3 data sync and backup integration · Third-party WebDAV data sync and backup integration b3log.org · 20 Sept 2026

Subscription $148/mo Pricing page displays Lifetime; its FAQ also refers to an annual subscription 8GB cloud storage b3log.org · 20 Sept 2026

PRO Features $64 once $64 Lifetime~~$96~~ Basic functions · Third-party S3 and WebDAV sync and backup integrations; storage service not included b3log.org · 4 Oct 2026

Subscription $148 once $148 Lifetime~~$296~~ PRO Features · 8GB official cloud storage · Cloud assets hosting · Cloud Inbox · Official data sync and backup b3log.org · 4 Oct 2026

Compared on note-taking apps

Free plan: Yes
Offline access: Yes
Supported platforms: Windows, macOS, Linux, iOS, Android, web interface, Chrome/Edge extension, API, Docker self-hosting
Note sharing: Yes
Storage limit: 8 GB
Integrations: OpenAI API, Amazon S3-compatible storage, WebDAV

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9.0 Joplin Free trial €2.99/mo

9.0 Obsidian Free plan

SiYuan

Purpose: SiYuan describes itself as a privacy-first personal knowledge management system supporting Markdown, block-level references, and bidirectional links.
Block editing: It organizes content as blocks and includes more than 20 block-level element types and more than 10 span-level element types.
Large documents: The maker says dynamic loading allows documents with millions of words to be edited smoothly on ordinary computers.
Flashcards: Spaced repetition uses the FSRS algorithm.
Databases: Databases support relations, rollups, and templates.
AI: The AI feature accesses OpenAI and can help continue writing, translate, summarize, brainstorm, and correct grammar and spelling.
Knowledge links: The product provides backlinks with filtering and search, plus global and block-level relationship graphs.
Privacy: The privacy policy says SiYuan does not collect user personal information or usage data and that data is kept on the user's device under their control.
Encrypted sync: The maker describes multi-device sync as end-to-end encrypted and incremental.
Self-hosting: SiYuan can be deployed on a server using its Docker image, with access rights controlled through an authorization code.
Support and trial: The pricing FAQ says users can enable a trial subscription in SiYuan Desktop under Settings - Account, but does not state its duration; it also says subscriptions are non-refundable.
Open source: The download page says SiYuan is completely open source and that most features are free, including for commercial use.
Data format: The download FAQ says notebook documents use .sy files and the data format is JSON.
Price from: $64/mo

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Where it ranks on The Geeks Club

Best Note-Taking Apps in 2026#3 of 219
Best Personal Knowledge Management Software in 2026#1 of 32

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Sources

b3log.org/siyuan/en/· checked 4 Oct 2026
b3log.org/siyuan/en/privacy.html· checked 4 Oct 2026
b3log.org/siyuan/en/pricing.html· checked 4 Oct 2026
b3log.org/siyuan/en/download.html· checked 4 Oct 2026