AppFlowy
AppFlowy is an open-source alternative to Notion. You are in charge of your data and customizations. Built with Flutter and Rust.. Open source code and premium support and plans available at PieceX for OSS. Download source code for free. PieceX for OSS is our open source initiative where supporters can provide additional features, support, or customizations for existing open sources repositories. Providers offering additional functions, support or code customizations can upload their subscriptions plans for other users to purchase. You can choose between different plans with either a monthly subscription or one-time payment.