Need help with gridsync?
Click the “chat” button below for chat support from the developer who created it, or find similar developers for support.

About the developer

149 Stars 17 Forks GNU General Public License v3.0 4.8K Commits 52 Opened issues


Synchronize local directories with Tahoe-LAFS storage grids

Services available


Need anything else?

Contributors list



.. image:: :target:

Gridsync aims to provide a cross-platform, graphical user interface for

_, the Least Authority File Store. It is intended to simplify the Tahoe-LAFS installation and configuration process and ultimately provide user-friendly mechanisms for common use-cases like backing up local files, synchronizing directories between devices, and sharing files and folders with other users across all major desktop platforms (GNU/Linux, macOS, and Windows). More broadly, Gridsync aims to duplicate most of the core functionality provided by other, proprietary "cloud" backup and synchronization services and utilities (such as Dropbox and BitTorrent Sync) but without demanding any sacrifice of the user's privacy or freedom -- and without requiring usage or knowledge of the command line. Accordingly, Gridsync is developed with the goal in mind of making secure cloud storage freely available to everyone, without exception, without added barriers, and regardless of one's operating system choice.

.. _Tahoe-LAFS:

Why Gridsync?

Tahoe-LAFS already provides a number of highly desirable properties for secure file-storage: in addition to offering client-side encryption, it is decentralized, robust, free (as in both beer and speech), stable and mature, and written by a group of very talented developers. Unfortunately -- and despite all of its technical merits -- Tahoe-LAFS has a number of persistent usability issues which steepen its learning curve: its installation requires manual compilation from source on Windows and macOS, its configuration consists in hand-editing text files, its primary interface requires heavy command line usage, and many of its fundamental concepts (e.g., "dircap", "shares", "servers-of-happiness") are opaque to new users or otherwise demand additional reading of the project's extensive documentation. Accordingly, Tahoe-LAFS' userbase consists primarily in seasoned developers and system administrators; non-technical users are naturally excluded from enjoying Tahoe-LAFS's aforementioned advantages.

The Gridsync project intends to overcome some of Tahoe-LAFS's usability barriers by means of following features:

  • "Batteries included" packaging -- Gridsync bundles will include Tahoe-LAFS and all required dependencies for a frictionless installation experience; no python installation or manual compilation is required.
  • A graphical user interface for managing primary Tahoe-LAFS functionality (e.g., starting, stopping, configuring gateways) -- the user will never have to edit a text file by hand or touch the command line.
  • "Native" look and feel -- Gridsync uses the Qt application framework, emulating native widgets on all target platforms; the user can expect Gridsync to behave like any other desktop application.
  • Automated bi-directional file synchronization -- Gridsync will monitor local and remote directories, seamlessly storing or retrieving new versions of files as they appear (using Tahoe-LAFS' "Magic Folder" feature [*]_ ).
  • Status indicators -- the user will know, at a glance, the number of connected storage nodes, folder sizes and modification times, when folders are synchronizing, recently updated files, etc.
  • Desktop integration -- Gridsync can (optionally) start automatically on login and provide desktop notifications when certain operations have completed.
  • Easy sharing -- Gridsync uses the
    _ library to provide human-pronounceable "
    invite codes
    _" for joining storage grids and sharing folders with other users.
  • Simple recovery -- Gridsync's "
    Recovery Key
    _" subsystem allows connections and folders to be easily restored from a single file in the event of a disaster.
  • Tor support
    _ (experimental) -- Gridsync can tunnel outgoing connections through the
    _ anonymity network, concealing users' network location from storage service providers and each other.

.. _magic-wormhole: .. _invite codes: .. _Recovery Key: .. _Tor support: .. _Tor:

.. [*] Tahoe-LAFS' "Magic Folder" functionality is not (yet) fully supported on macOS or other BSD-based operating systems and is presently marked as experimental.

Screenshots (latest release; running macOS 10.14 with dark mode enabled):

.. image::

.. image::

.. image::

.. image::

Screenshots (previous releases; running GNU/Linux with Xfce 4):

.. image::

.. image::

.. image::

.. image::

.. image::

.. image::

.. image::

.. image::

Installation and running:

Stable releases:

Downloads for "stable" releases of Gridsync can be found on the project's

GitHub Releases page
_ and include pre-built/binary distrubitions for all three major desktop platforms that have been compiled inside dedicated virtual machines on dedicated hardware. Users wishing to install these packages are strongly urged to
verify their signatures
_ before running or, alternatively, to build/install Gridsync manually from source (see below).

.. _GitHub Releases page: .. _verify their signatures:

To install and run Gridsync on GNU/Linux (64-bit only; supporting glibc 2.17 and above -- including Debian 9+, Ubuntu 16.04 LTS+, CentOS 7+, and Fedora 28+):

  1. Download
    _ (and
    _ its signature)
  2. Make the AppImage executable (
    chmod +x Gridsync-Linux.AppImage
  3. Run

.. _Gridsync-Linux.AppImage: .. _verify:

To install and run Gridsync on macOS (64-bit only; supporting macOS 10.14 "Mojave" and above):

  1. Download
    _ (and
    _ its signature)
  2. Drag the enclosed "" bundle anywhere (e.g.,
  3. Double-click

.. _Gridsync-macOS.dmg: .. _verify:

To install and run Gridsync on Windows (64-bit only; supporting Windows Server 2012R2, Windows 7 SP1, Windows 8.1, and Windows 10):

  1. Download
    _ (and
    _ its signature)
  2. Run the executable installer and follow/complete the setup wizard
  3. Select "Launch Gridsync" when installation is finished

.. _Gridsync-Windows-setup.exe: .. _verify:

From source:

The project

_ (or
_ file on Windows) references the various scripts and commands necessary for building Gridsync from source. For most users with Python 2 and 3 already installed, building the application should simply be a matter of issuing a
command at the top-level of the source tree:

.. code-block:: shell-session


This will create a standalone executable distribution of Gridsync with all of its dependencies included (including a "frozen" python interpreter and Tahoe-LAFS, using

), placing the resultant files/installers in the
subdirectory. Should any errors arise regarding missing dependencies, a `provision
_ script (or
provisiondevtools.bat` on Windows) is provided to download and install all of the core dependencies needed to build Gridsync on most supported operating systems.

.. Makefile: .. _make.bat: .. _PyInstaller: .. .. _provisiondevtools.bat:

Note, however, that PyInstaller-generated binaries are typically

not backward-compatible
_; a PyInstaller executable that was built on a newer GNU/Linux distribution, for example (i.e., with a more recent version of
) will not run on older distributions. Accordingly, if you intend to distribute Gridsync binaries for use on a wide range operating system versions, it is recommended that you build the application on as old of a system as is reasonable for a given platform (i.e., one which can build and run Gridsync but which still receives security updates). Presently, CentOS 7, macOS "Mojave" (10.14), and Windows Server 2012 R2 arguably constitute the most suitable candidates for GNU/Linux, macOS, and Windows build systems respectively (insofar as binaries generated on these systems will be forward-compatible with all others in that platform-category that are still supported upstream).

.. _not backward-compatible:

To help facilitate the testing, building, and distribution of forward-compatible binaries -- as well as to enable a crude form of "cross-compilation" -- a custom

_ has been provided inside the Gridsync source tree; users or developers with
_ and
_ installed [*]_ can automatically provision a complete Gridsync build environment that produces forward-compatible binaries via the following commands:

.. code-block:: shell-session

make vagrant-build-linux
make vagrant-build-macos
make vagrant-build-windows

These will download and configure a suitable virtual machine for the target platform (from the

public Vagrant Boxes catalog
_), provision it with all required dependencies (such compilers/SDKs, python interpreters, X11 libraries, etc.), copy the Gridsync source code into the target VM, run the Gridsync test suite, and compile a final PyInstaller-generated binary package suitable for distribution (the result of which can be found in the
directory of the guest VM).

.. _Vagrantfile: .. _Vagrant: .. _VirtualBox: .. _public Vagrant Boxes catalog:

.. [*] Note that in order to get Vagrant/VirtualBox working properly, users of GNU/Linux may need to add the current user's name to the local "vboxusers" group, while users experiencing issues with Windows guests may need to install some combination of the

, or
Vagrant plugins (via the
vagrant plugin install winrm winrm-fs winrm-elevated
command). For further assistance with installing, configuring, or using Vagrant and/or VirtualBox on your system, please consult the appropriate upstream documentation and/or help forums. In addition, please note that Gridsync project can make no guarantees about the security or safety of public Vagrant "Boxes"; please exercise appropriate caution when relying upon third-party software.

Alternatively, users with

installed can use the CentOS 7-based
_ image to build equivalent backward-compatible binaries without the addded overhead of Vagrant and VirtualBox:

.. code-block:: shell-session

make in-container

.. _gridsync-builder:

Known issues and limitations:

While Gridsync ultimately aims to provide an easy-to-use frontend for users of Tahoe-LAFS, at present, its interface only supports a very limited subset of Tahoe-LAFS's underlying features and potential use-cases (namely, it provides simplified means for joining storage grids, creating and sharing "magic-folders," and receiving status updates and notifications pertaining to those processes). Accordingly, users should not (yet) expect Gridsync to provide a complete backup solution or to serve as a stand-in replacement for other tools with robust sharing and collaboration capabilities.

In addition, it should be noted that Tahoe-LAFS's "magic-folder" functionality itself is currently considered "experimental" and has a number of

known issues and limitations
_ and
open development tickets

.. _known issues and limitations: .. _open development tickets:


Contributions of any sort (e.g., suggestions, criticisms, bug reports, pull requests) are welcome. Any persons interested in aiding the development of Gridsync are encouraged to do so by opening a

GitHub Issue
_ or by contacting its primary developer:
[email protected]

.. _GitHub Issue: .. [email protected]: mailto:[email protected]


Copyright (C) 2015-2021 Christopher R. Wood

This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with this program. If not, see


The ongoing development of this project has been made possible by the generous sponsorships and grants provided by

Least Authority
_ (2016-),
_ (2017), and
Open Technology Fund
_ (2019-2020).

.. _Least Authority: .. _Internews/UXFund: .. _Open Technology Fund:

We use cookies. If you continue to browse the site, you agree to the use of cookies. For more information on our use of cookies please see our Privacy Policy.