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Syncthing

Syncthing

Syncthing: Real-Time File Synchronization Without the Cloud, the Ads, or the Surveillance What Is It? Syncthing is a peer-to-peer synchronization tool that replaces cloud-based solutions like Dropbox or OneDrive — but without centralized servers, subscriptions, or data leaks. Every device runs its own instance, and files sync directly between them using strong encryption, versioning, and conflict detection. It works cross-platform and can sync in real time over LAN or the internet.

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  • OS: Windows, Linux, macOS
  • Size: 62 MB
  • Version: 1.0
  • Download: 17,483 downloads
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Syncthing: Real-Time File Synchronization Without the Cloud, the Ads, or the Surveillance

What Is It?

Syncthing is a peer-to-peer synchronization tool that replaces cloud-based solutions like Dropbox or OneDrive — but without centralized servers, subscriptions, or data leaks. Every device runs its own instance, and files sync directly between them using strong encryption, versioning, and conflict detection. It works cross-platform and can sync in real time over LAN or the internet.

Sysadmins love it for syncing config files, toolkits, or backups between machines. Developers use it for sharing code or documents without Git. And power users run it on everything — from laptops to NAS boxes and even Raspberry Pi — because it just works, quietly and privately.

Capabilities

Feature Description
Peer-to-Peer Sync Devices talk directly — no central server needed
Cross-Platform Runs on Windows, Linux, macOS, BSD, Android, Docker, and more
Encrypted by Design All communication is secured with TLS and device IDs
Versioning Support Keeps old versions of files if changes conflict or are deleted
Selective Sync Choose which folders or subfolders to sync on each device
Web-Based UI Configure everything via local browser interface (default: port 8384)
Portable & Headless Options Runs as a background service or GUI, even on headless devices

Deployment Notes

– Requires port forwarding or relay for devices outside local network.
– Resource-light, but disk I/O can spike during large sync operations.
– Uses its own sync protocol, not rsync or SMB — fully encrypted and efficient.
– No user accounts or logins — devices authenticate via shared IDs and keys.
– Works great in closed networks, even without internet (LAN-only mode).

Installation Guide

1. Download from Official Site
– https://syncthing.net (choose package for OS)

2. Install or Run as Portable
– Extract or install depending on OS; no root/admin needed in most cases.

3. Access Web GUI
– Open http://localhost:8384 in browser.

4. Add Remote Devices
– Exchange device IDs and approve connections.

5. Create Shared Folder
– Choose path, folder ID, sync options, and which devices participate.

6. Set Versioning Rules (Optional)
– Enable trash, staggered versions, or simple file history.

Usage Scenarios

– Syncing working directories between a desktop and a laptop automatically.
– Distributing scripts, configs, or toolkits across a fleet of internal machines.
– Running private sync between mobile devices and desktops without using cloud services.
– Backing up critical folders to multiple machines for redundancy.
– Sharing files securely in small teams or air-gapped environments.

Syncthing backup setup guide for reliable snapshots and restore points | BackupInfra

What is Syncthing?

Syncthing is a free, open-source peer-to-peer file synchronization tool that allows users to backup and synchronize their files across multiple devices. It is designed to be a reliable and secure solution for backing up important files, and it has gained popularity among individuals and businesses alike.

Main Features

Syncthing has several key features that make it an attractive option for those looking for a robust backup solution. Some of the main features include:

  • Peer-to-peer synchronization: Syncthing allows users to synchronize their files directly between devices, without the need for a centralized server.
  • End-to-end encryption: All data transferred between devices is encrypted, ensuring that files remain secure and protected.
  • Real-time synchronization: Files are synchronized in real-time, ensuring that users have access to the latest versions of their files across all devices.

Installation Guide

Step 1: Download Syncthing

The first step in setting up Syncthing is to download the software from the official website. Syncthing is available for Windows, macOS, and Linux, and can be downloaded as a binary or installed via a package manager.

Step 2: Install Syncthing

Once the download is complete, follow the installation instructions to install Syncthing on your device. The installation process is straightforward and should only take a few minutes.

Setting up Syncthing Backups

Configuring Backup Folders

To set up Syncthing backups, users need to configure the backup folders on each device. This involves specifying the folders that contain the files to be backed up, as well as the folders where the backups will be stored.

Scheduling Backups

Syncthing allows users to schedule backups to run at regular intervals. This ensures that backups are performed consistently, and that files are always up-to-date.

Technical Specifications

System Requirements

Syncthing has minimal system requirements, making it suitable for use on a wide range of devices. The software requires a 64-bit operating system, at least 2GB of RAM, and a minimum of 1GB of free disk space.

Security Features

Syncthing has a number of security features that ensure files are protected during transfer and storage. These include end-to-end encryption, secure authentication, and access controls.

Pros and Cons

Pros

Syncthing has a number of advantages that make it a popular choice for backups. Some of the pros include:

  • Free and open-source: Syncthing is completely free to use, and the source code is available for review and modification.
  • Peer-to-peer synchronization: Syncthing allows users to synchronize files directly between devices, without the need for a centralized server.
  • End-to-end encryption: All data transferred between devices is encrypted, ensuring that files remain secure and protected.

Cons

While Syncthing is a robust backup solution, it does have some limitations. Some of the cons include:

  • Steep learning curve: Syncthing can be complex to set up and configure, especially for users who are new to backup software.
  • Limited support: While Syncthing has a large community of users, it can be difficult to find support and resources for the software.

FAQ

Is Syncthing secure?

Yes, Syncthing is a secure solution for backups. All data transferred between devices is encrypted, and access controls ensure that only authorized users can access files.

Can I use Syncthing for free?

Yes, Syncthing is completely free to use. There are no costs or subscriptions required to use the software.

How do I set up Syncthing backups?

To set up Syncthing backups, follow the installation guide and configure the backup folders on each device. You can also schedule backups to run at regular intervals.

Related articles

Syncthing hands‑on backup checklist covering jobs, reports and test restores | BackupInfra

Syncthing: Streamlining Backup Processes for Enhanced Data Security

Syncthing is a powerful, open-source software that simplifies the process of backing up and syncing data across multiple devices. In this article, we will explore how to use Syncthing for offsite backups, creating a robust local and offsite backup strategy. We will also discuss how Syncthing serves as a free backup software download alternative to expensive backup suites.

Understanding the Basics of Syncthing

Syncthing is designed to be easy to use and highly customizable, allowing users to create a backup system that fits their specific needs. The software uses a decentralized approach, syncing data directly between devices without relying on a central server. This approach ensures that data is always available, even in the event of a device failure or loss.

Key Features of Syncthing

  • Decentralized syncing: Sync data directly between devices without a central server.
  • Real-time syncing: Changes are synced in real-time, ensuring data is always up-to-date.
  • Versioning: Store multiple versions of files, allowing for easy recovery in case of data loss or corruption.
  • Encryption: Data is encrypted in transit and at rest, ensuring maximum security.

These features make Syncthing an ideal solution for individuals and businesses looking to create a robust backup strategy.

Setting Up Syncthing for Offsite Backups

To set up Syncthing for offsite backups, follow these steps:

  1. Download and install Syncthing on the device you want to back up.
  2. Create a new folder on the device and add the files you want to back up.
  3. Configure Syncthing to sync the folder with a remote device or storage service.
  4. Set up retention rules to determine how long to keep backups.

By following these steps, you can create a comprehensive offsite backup strategy using Syncthing.

Creating a Local and Offsite Backup Strategy

A robust backup strategy should include both local and offsite backups. Local backups provide quick access to data in case of a device failure, while offsite backups ensure data is safe in the event of a disaster or data loss.

 

Backup Type Pros Cons
Local Backup Quick access to data, easy to set up Data may be lost in case of device failure or disaster
Offsite Backup Data is safe in case of disaster or data loss, can be accessed remotely

By combining local and offsite backups, you can create a comprehensive backup strategy that ensures data is always available.

Comparing Syncthing to Expensive Backup Suites

Syncthing offers many of the same features as expensive backup suites, but at a significantly lower cost. Here’s a comparison of Syncthing with some popular backup suites:

Backup Software Cost Features
Syncthing Free, open-source Decentralized syncing, real-time syncing, versioning, encryption
Backup Suite 1 $100/year Centralized syncing, scheduled backups, encryption
Backup Suite 2 $200/year Decentralized syncing, real-time syncing, versioning, encryption

As shown, Syncthing offers many of the same features as expensive backup suites, but at no cost.

Syncthing Backup

In conclusion, Syncthing is a powerful tool for creating a robust backup strategy. Its decentralized approach, real-time syncing, and encryption features make it an ideal solution for individuals and businesses looking to protect their data. By following the steps outlined in this article, you can set up Syncthing for offsite backups and create a comprehensive local and offsite backup strategy.

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