SiYuan is listed under AI Note-Taking & Docs, in the Productivity & Workflow category on Flocci AI Tools. Privacy-first, self-hostable knowledge workspace with block-level references. It is free, with no paid plan attached, and it lives at b3log.org.
SiYuan is listed as fully free — there is no paid tier attached to it in the catalog. That makes it one of the 399 entries on Flocci AI Tools with no upgrade path built in.
SiYuan does 4 things the catalog singles out: Privacy-first, self-hostable knowledge workspace with block-level references; built-in ai assistant using your openai-compatible api; free and open source, developed in china with english ui; desktop, mobile and docker.
AFFiNE is the closest free alternative: it sits in the same AI Note-Taking & Docs sub-category and is free. Blinko, Google AI Edge Eloquent and Karakeep also start free. The full list is on the alternatives page.
See the full list →