Sigle

Sigle is an open-source writing and newsletter platform where authors sign in with a Stacks wallet, posts default to decentralized storage, and finished pieces can be inscribed onto Bitcoin as immutable records. It offers a rich-text editor, custom appearance, email delivery and privacy-friendly analytics, and authors can attach their own entry point while keeping the subscriber list.

The selling point is ownership: content and reader relationships do not sit in a platform database, published work cannot be edited or removed by the operator, and authors can take their data elsewhere; paid content runs through NFT gating or a third-party processor, with revenue reaching the author directly. Writers and readers are mostly crypto practitioners, and the product has iterated since 2019 under a permissive open-source licence.