Turtl

Turtl is a secure, private notebook that keeps your data under your control. It syncs across devices and uses Spaces to share data selectively with teammates or family. Data is protected with client-side cryptography, so only you and invited collaborators can access it. The project is open-source, and you can install your own Turtl server for maximum privacy and control.

• Client-side cryptography to keep all data safe (end-to-end encryption)
• Secure sharing with configurable permissions via Spaces
• Full-text search, tag filtering, and easy organization
• Markdown support for notes
• Multiple note types: text, bookmark, password, image, and file/document
• Attach photos, files, and documents; files stored securely
• Browser extension for easy bookmarking on desktop
• Share to Turtl on Android for quick bookmarking and uploads
• TeX math rendering
• Import/export your profile for backup or server migration
• Semi-offline mode with cross-device sync
• Keyboard shortcuts for navigation; open-source with a self-hosted option

• Strong privacy posture with client-side encryption and zero-knowledge design
• Open-source, auditable codebase with transparency
• Optional self-hosted server for complete data control
• Fine-grained sharing and Spaces to manage collaboration without compromising security
• Rich note types and Markdown/TeX support for flexible documentation
• Cross-device sync and offline access for productivity
• Active community and sustainable open-source model

• Basic (Free): Store up to 50MB of note data; collaborate with up to three people per space; Community support
• Premium: $3/mo; Store up to 10GB; collaborate with up to 10 people per space; Community support; Start 30-day trial
• Business: $8/mo; Store up to 50GB; collaborate with up to 50 people per space; Dedicated support; Start 30-day trial