The best open source alternative to Palmr is Nextcloud. If that doesn't suit you, we've compiled a ranked list of other open source Palmr alternatives to help you find a suitable replacement. Other interesting open source alternatives to Palmr are: Seafile, PairDrop, OpenCloud, and Peergos.
Palmr alternatives are mainly Cloud File Sync & Share Tools but may also be Cloud Storage Tools or Collaborative Workspaces. Browse these if you want a narrower list of alternatives or looking for a specific functionality of Palmr.
Nextcloud offers on-premises file sync, sharing and collaboration platform with advanced security and privacy features.

Nextcloud is an open source, self-hosted file sync and share platform that allows organizations to store, share and collaborate on files securely.
Key features include:
Nextcloud is designed for organizations that need secure file sharing and collaboration while maintaining control over their data. It can be deployed on-premises or with a trusted cloud provider.
Some key benefits of Nextcloud:
Nextcloud is used by thousands of organizations worldwide, including major enterprises, educational institutions and government agencies. It provides a powerful yet easy-to-use platform for secure content collaboration.
Looking for open source alternatives to other popular services? Check out other posts in the alternatives series and openalternative.co, a directory of open source software with filters for tags and alternatives for easy browsing and discovery.
Open source file sync and sharing platform with custom properties, AI automation, collaborative editing, and enterprise-grade security for teams.

Transform how you organize and collaborate on files with this powerful self-hosted solution that goes beyond traditional file syncing. Built for teams who need complete control over their data while maintaining seamless collaboration.
Key advantages:
Perfect for teams seeking:
Trusted by over 1 million users worldwide, this solution offers the perfect balance of powerful features and data sovereignty.
Share files instantly between devices using peer-to-peer technology. No registration, installation, or configuration required. Works cross-platform.

PairDrop makes file sharing between devices incredibly simple and secure. Using peer-to-peer technology, you can instantly transfer images, videos, PDFs, and links to nearby devices without any setup or account creation.
Key Features:
Simply open PairDrop in your browser on multiple devices, and they'll automatically discover each other when connected to the same network. The intuitive interface makes sharing as easy as drag-and-drop, while the peer-to-peer architecture ensures your files never touch external servers, keeping your data completely private and secure.
Enterprise-grade file management solution offering intuitive collaboration, seamless integration, and comprehensive security with full GDPR compliance.

OpenCloud delivers enterprise-level file sharing and collaboration with a focus on security, simplicity, and digital sovereignty. Built on 30 years of open source expertise, it provides organizations with powerful tools to make their knowledge more accessible and manageable.
The platform features an intuitive interface that new users can quickly master, while IT administrators benefit from straightforward deployment and integration. Security is paramount, with comprehensive features including end-to-end encryption, flexible access controls, two-factor authentication, and ransomware protection through secure versioning.
Key benefits include:
Whether serving public authorities, research institutions, educational organizations, or businesses, OpenCloud combines enterprise-grade security with user-friendly collaboration tools to help teams work more efficiently while maintaining complete control over their data.
A peer-to-peer encrypted filesystem for secure file storage, sharing, and collaboration with end-to-end encryption and user-controlled data.

Peergos is a revolutionary platform that puts you in control of your digital life. Built on peer-to-peer technology and end-to-end encryption, Peergos offers a secure and private alternative to traditional cloud storage services.
Key benefits of Peergos include:
With Peergos, you can store, share, and collaborate on your files with peace of mind, knowing that your data remains under your control and protected from prying eyes. Experience the future of secure, decentralized file storage today.
Secure, open-source platform for file storage, sharing, and collaboration. Host your data on your own infrastructure with full control and transparency.

Sync-in is an open-source file storage and collaboration platform that puts you in complete control of your data. Unlike traditional cloud services, you host everything on your own infrastructure, ensuring data sovereignty and compliance with regulatory requirements.
Key features include:
The platform combines security by design with modern performance, offering a scalable architecture suitable for individual users to enterprise deployments. Built with transparency at its core, Sync-in benefits from continuous community contributions while maintaining the highest security standards.
Whether you need to collaborate with external partners through the guest system, manage complex file workflows, or ensure regulatory compliance, Sync-in provides a powerful alternative to proprietary cloud storage solutions without compromising on functionality or user experience.
Looking for open source alternatives to other popular services? Check out other posts in the alternatives series and openalternative.co, a directory of open source software with filters for tags and alternatives for easy browsing and discovery.
Open-source personal cloud that automatically gathers all your data from third-party services. French-hosted with privacy-first design, no ads, and seamless device sync.

Take complete control of your digital life with a privacy-first personal cloud that automatically imports and organizes all your data from third-party services. This French-made solution combines the convenience of major cloud providers with the security and control you deserve.
Automatic data gathering pulls in bills, bank statements, receipts, health reimbursements, and payslips without manual effort. Your documents sync seamlessly across all devices - PC, smartphone, and tablet - eliminating tedious manual transfers.
Built-in tools include a secure note-taking system for private collaboration, and an integrated password manager that remembers and syncs all your credentials with one-click login. Your data stays protected with French hosting at OVH, Europe's largest hosting company.
Key advantages include:
Unlike Silicon Valley alternatives, this solution puts your privacy first while delivering the same convenience and functionality. Perfect for individuals, families, and professionals who want complete data sovereignty without sacrificing usability.
Lightweight, self-hosted cloud storage built with Rust and Vue.js. Features end-to-end encryption, file sharing, search capabilities, and Docker deployment.

Hoodik is a lightweight, secure, and self-hosted cloud storage solution built with Rust and Vue.js. Designed with privacy at its core, it provides end-to-end encryption that protects your data from unauthorized access.
Key Features:
The intuitive web interface makes file management simple, while the robust architecture ensures your data remains private and secure. Perfect for individuals and organizations seeking a privacy-focused alternative to mainstream cloud storage providers.
Open source encrypted data storage solution offering secure file sharing, collaboration tools, and on-premises deployment for professional teams.

Secure your professional data with an open source encrypted storage solution that puts privacy first. Store, share, and collaborate on files with complete control over your data through on-premises deployment options.
Key features include:
Perfect for businesses seeking privacy-focused file storage without compromising on functionality. The platform combines enterprise-grade security with an intuitive interface, making it easy for teams of any size to collaborate while keeping sensitive data protected. Built by LINAGORA, a leader in European open source solutions.
Firefiles is an open-source alternative to Dropbox that lets you manage files across multiple cloud storage providers through a single interface.

Firefiles revolutionizes cloud storage management by offering a unified platform for all your storage needs. Here's what makes Firefiles stand out:
Multi-Provider Support: Seamlessly integrate with popular cloud storage providers like Firebase, AWS, Digital Ocean, Backblaze, and more.
Open Source: Fully open-sourced on GitHub, ensuring transparency and community-driven development.
Enhanced Security: Offers superior security and privacy compared to traditional cloud storage solutions.
User-Friendly Interface:
Efficient File Management:
Customizable: Set up your cloud drive with the backend of your choice.
Team Collaboration: Invite team members to your cloud drives (coming soon).
Cross-Platform: Available for MacOS, Windows, and Linux.
Firefiles is designed to be the last cloud storage solution you'll ever need, combining the flexibility of multiple providers with the simplicity of a single, user-friendly interface. Whether you're an individual user or part of a team, Firefiles offers a seamless experience for all your file storage and management needs.