What Syncthing does

Syncthing is an open-source, peer-to-peer continuous file synchronization program developed and maintained under The Syncthing Foundation. It synchronizes files between two or more computers in real time using a documented Block Exchange Protocol (BEP) v1 layered over TLS 1.3 with perfect forward secrecy and 384-bit ECDSA cryptographic device authentication; devices are addressed by SHA-256-derived base32 device IDs, and no data is ever stored on a central server. The software runs across macOS, Windows, Linux, FreeBSD, Solaris, and OpenBSD, is configured and monitored via a browser-based GUI on the local GUI port, and is supplemented by community-maintained wrappers including Syncthing-GTK, syncthing-macos, Möbius Sync for iOS, and Syncthing-Fork on Android.

Name

Syncthing

Legal name

The Syncthing Foundation

Website

https://syncthing.net

Company type

Private

Founded year

2014

Operating status

Operating

Short description

Syncthing is a free, open-source peer-to-peer file synchronization tool operated by The Syncthing Foundation, serving privacy-conscious individuals and tech-savvy users who want to replace cloud sync subscriptions with decentralized, serverless file syncing across their personal devices.

Ownership category

akta.pro rank

Product category

Peer-to-Peer File Synchronization Software

NAICS

Computer Systems Design and Related Services (54151), Computing Infrastructure Providers, Data Processing, Web Hosting, and Related Services (518)

SIC

Services-Prepackaged Software (7372)

akta.pro primary industry

File Storage, Sync & Sharing (BPAMAMAE)

akta.pro secondary industry

Secure File Transfer & Managed File Transfer (MFT) (HDADAFAK)

Keywords

• File synchronization software
• Peer-to-peer sync
• Open-source synchronization
• Decentralized file transfer
• Cross-platform file sync

GTM type

B2C

Offering type

Software

Cost components

Infrastructure, Technology or R&D, Operations, Others

Revenue model

1. Donations and Sponsorship: Syncthing is entirely free and open-source with no revenue from product sales. The project is funded entirely through voluntary donations from individual users and corporate sponsors. Donations cover operational costs including domain registration, hosting fees for discovery servers, build servers, and the project website. Development grants for specific features are occasionally funded from these donations.

Go-to-market motion1 record

Distribution channels3 records

Marketing channels5 records

Core offering

Syncthing is a free, open-source continuous peer-to-peer file synchronization program that synchronizes files between multiple computers in real time without relying on a central server. It uses the Block Exchange Protocol (BEP) v1, TLS 1.3 encryption with perfect forward secrecy, and SHA-256-based cryptographic device authentication to securely exchange data directly between user-controlled devices. The software runs on Windows, macOS, Linux, FreeBSD, Solaris, and OpenBSD, and is operated as a community open-source project.

Product overview

Syncthing is a single unified open-source peer-to-peer file synchronization product. The core is the Syncthing synchronization engine, which can be accessed via a built-in web GUI or wrapped by community GUI applications. Syncthing-GTK provides cross-platform GUI access, syncthing-macos offers native macOS integration, and third-party clients like Möbius Sync for iOS extend mobile access. Infrastructure services include relay servers for NAT traversal and discovery services for device connection. The project is maintained by the Syncthing Foundation with commercial support available through Kastelo Inc.

Differentiator

Problem solved

Functional benefit

Quantifiable outcome

• Users can eliminate cloud subscription costs entirely, saving an average of $219/month (based on 2024 C+R Research on American subscription spending)

Segments2 records

Ideal customer profiles1 record

Technology focussed Yes

API detail

Has API

Yes

API docs

API detail

Core technology

AI maturity

App detail

Feature8 records

Partnerships

One partnership is on record.

• Kastelo Inc.coreTechnology or IntegrationKastelo Inc. provides commercial support services for Syncthing and is the primary corporate sponsor of the project. They sponsor Syncthing with development resources and offer paid enterprise support packages. Kastelo is the most significant commercial relationship in the Syncthing ecosystem.

Scale indicators3 records

Recent moves6 records

Expansion highlights5 records

Broad incumbents

• Apple iCloud Drive: Apple iCloud Drive is Apple's consumer cloud sync platform deeply integrated with macOS and iOS. It is identified in Syncthing's marketing as one of the subscription services users seek to replace with a local-first alternative.
• Dropbox: Dropbox is the largest cloud-based file sync and sharing incumbent with broad consumer and enterprise adoption. Syncthing explicitly positions itself as an alternative to Dropbox's recurring subscription model, making it a central competitive reference point.
• Microsoft OneDrive: Microsoft OneDrive is the cloud sync incumbent bundled with Windows and Microsoft 365. It is one of the named cloud services Syncthing aims to displace for users concerned about subscription costs and data ownership.
• Google Drive: Google Drive is the default consumer and enterprise cloud sync platform integrated across Google Workspace. Syncthing's customer segment is defined partly as users seeking to escape Google Drive's storage and subscription model.

Direct peers

• Resilio Sync: Resilio Sync (formerly BitTorrent Sync) is the closest direct peer to Syncthing: a peer-to-peer file synchronization tool with no central server, commercial and personal tiers, and cross-platform support. It competes for the same self-hosted, serverless sync use case Syncthing targets.
• Nextcloud: Nextcloud is an open-source file sync and collaboration platform offering self-hosted alternatives to Dropbox and Google Drive. While it relies on a central server (unlike Syncthing's pure P2P), it competes directly for users seeking privacy-first, subscription-free file sync.
• ownCloud: ownCloud is an open-source self-hosted file sync and share platform targeting the same privacy-conscious, subscription-averse users as Syncthing. Like Nextcloud, it uses a central server model but directly competes for the data sovereignty segment.
• Seafile: Seafile is an open-source file sync, sharing, and collaboration platform with self-hosted and cloud-hosted editions. It competes for privacy-conscious teams and individuals seeking Dropbox alternatives, similar to Syncthing's audience.

Emerging players

• pCloud: pCloud is a European-based cloud storage and sync provider positioned around privacy and one-time-payment alternatives to subscriptions. It targets a similar privacy-conscious subset of users as Syncthing, though with a centralized cloud model.
• Möbius Sync: Möbius Sync is an iOS-native client built on the Syncthing protocol and listed as a Syncthing sponsor. It extends Syncthing's reach into Apple's ecosystem with a focused mobile experience and partially overlaps as both complement and competitor in iOS file sync.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights7 records

Customer concentration

• GitHubgithub.com/syncthing
• Xx.com/syncthing

Revenue estimate

Valuation estimate

Number of profiles

Profiles4 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Syncthing