Sheaf is an open-source platform designed for tracking plural systems, offering users a way to organize and manage information about system members, switches, and internal communication. It addresses the needs of plural communities seeking a sustainable and privacy-conscious alternative to other tools, particularly in the context of changes to existing services. The platform is built to prioritize data security, with email and TOTP secrets encrypted at rest using XChaCha20-Poly1305, and all data handled as GDPR Article 9 special category data.
Sheaf supports both self-hosted and hosted deployments. Users can run their own instance using Docker Compose, ensuring full control over their data with no telemetry or external data sharing. sh for experimentation and testing. The same codebase underlies both hosted and self-hosted options, avoiding proprietary extensions and making maintenance straightforward.
The platform provides a range of features tailored to plural system management. Users can track members with details such as pronouns, descriptions, colors, birthdays, avatars, emoji, and privacy levels. It also allows for recording switches, cofronting, custom fronts, and organizing groups with nesting. Additional capabilities include tagging, user-defined custom fields, polls, messages, notes, journals for internal communication, per-member analytics, and revision history. Sheaf supports importing data from SimplyPlural and PluralKit, and enables users to export their data at any time.
Sheaf is built with a Python/FastAPI backend and a React frontend, following an API-first design with a full OpenAPI specification for mobile and third-party clients. It offers web access as well as dedicated apps for Android, iOS, Wear OS, and watchOS, including companion and complication support for wearable devices. 0-or-later license and is maintained by Lupine Systems LLC, which operates the hosted instances. This makes Sheaf a flexible, contributor-friendly solution for plural system tracking.
Sheaf - Plural System Tracker is a Health & fitness product. It provides a secure, open-source platform for tracking plural systems with privacy and flexibility. It is built as an open-source project for plural system users and communities. Sheaf - Plural System Tracker is open source under the AGPL-3.0 license. Sheaf - Plural System Tracker is available on the web, iOS, Android, and macOS, and it can be self-hosted.
It is developed by Lupine Systems (United States), and the product first shipped in 2026. Development happens publicly on GitHub with 10 stars and 499 commits in the last 90 days. Key capabilities include plural system tracking, self-hosting, and mobile apps. It exposes integrations via a public API.
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