Resilio Sync

Resilio Sync is a peer-to-peer tool for synchronizing and sharing files between devices. It suits people who want direct folder controls as well as one-off file sending. Its personal Sync 3.0 plan costs nothing, but its non-commercial license rules it out for business use.

Overview

Sync’s strongest case is control over how files move and who can access them. You can send files to multiple recipients without exposing a whole folder or setting up an ongoing sync, while Advanced Folders let you assign ownership and adjust or revoke read and write access. That makes it more adaptable than a simple one-way transfer when sharing needs change.

Resilio describes Sync as cloudless: files stay on users’ devices. If a relay is used, files pass through it encrypted and are not stored there. The company says Sync uses AES-128 encryption in transit and X.509 certificates for mutual authentication. These are specific security measures, though the product still depends on devices participating in the sync.

Key features

• Recipient-specific sending: Send files to multiple recipients without sharing a whole folder or creating a permanent connection. This suits occasional distribution better than setting up a continuing shared workspace.
• Folder permissions: Advanced Folders support ownership assignment and read/write permission changes, including revoking access. These controls are useful when access must be managed beyond the initial share.
• Selective Sync: Searchable placeholders let users download only needed files, helping conserve local storage when a synced collection is larger than the device’s available space.
• Bandwidth limits: Users can cap bandwidth used by Sync activity, a practical control for connections that need to reserve capacity for other work.
• Remote access tools: The plan includes a web interface, remote control, and DHT support alongside selective downloads.

Pricing

Sync 3.0 (personal, non-commercial): free. The plan is non-commercial, requires a license to activate, and has no expiration date. It includes selective download, a web interface, remote control, and DHT support. With no paid personal tier or trial, this is a straightforward no-cost option for individual use, but not a route to commercial use.

For commercial use, Resilio directs customers to Sync v2 or its business solutions; the available plan pricing is custom pricing. The free Sync 3.0 download cannot be used commercially. There is no published free-plan seat or transfer quota to weigh, so the meaningful limit is the license scope rather than a stated usage cap.

Platforms

Sync supports Windows, macOS, Linux, iOS, Android, and NAS. Desktop downloads include Windows 64-bit 7 or later, OS X 10.13 or later, Linux x64, Linux x64 with glibc 2.3, and Linux ARM64. Mobile and NAS downloads are provided separately; NAS packages are also restricted to personal, non-commercial use. The broad mix makes Sync a plausible choice for households or individuals moving files across desktop, mobile, and NAS devices, though its desktop requirements should be checked against older systems.

Who it's for

Choose Sync if you want device-to-device file synchronization with granular folder permissions, selective local downloads, and one-off sending, and your use is personal. It is less suitable if you need a commercially licensed Sync 3.0 product or a conventional cloud-stored file service.

Resilio links users to a Help Center, tutorials and demos, and user forums. It says it was founded in 2016 by technical leaders from BitTorrent and is based in the San Francisco Bay Area. Resilio also says it has been acquired by Nasuni, with products and customer support continuing without immediate changes.

Pros and cons

• Pro: One-off sending does not require sharing an entire folder or maintaining a sync connection, which keeps occasional transfers separate from ongoing access.
• Pro: Ownership, revocable access, and read/write controls make folder sharing more manageable as collaborators or requirements change.
• Pro: Selective Sync and bandwidth limits provide two practical ways to control local storage and network use.
• Con: Sync 3.0 is expressly non-commercial, so organizations need to consider Sync v2 or a business solution instead.
• Con: The cloudless design keeps files on users’ devices; it is not a cloud-storage substitute for keeping a hosted copy independent of those devices.

Alternatives

For a broader peer-to-peer file sharing software shortlist, compare the options by their intended use:

• Feem is worth considering for cross-platform file transfers, with a free plan offering unlimited file transfers; its platforms include web as well as desktop and mobile.
• TorrServer is a better fit for someone seeking a self-hosted torrent streaming server under GPL-3.0, rather than Sync’s file synchronization and sharing focus.
• BiglyBT is a free software option for users seeking a BitTorrent client across desktop, web, and Android platforms.
• BitComet is another free option, limited to private personal, non-commercial purposes.
• aMule may suit users looking for a GPL-2.0-licensed option with no telemetry or advertisements.
• Deluge is a free BitTorrent client whose source repository is published on GitHub.
• FrostWire is a free, open-source project for Android and desktop platforms.
• JSTorrent is a free, open-source multi-platform project, including an extension platform.

Verdict

Resilio Sync is a strong personal file-sharing choice for people who value device-based storage, selective downloads, and adjustable folder access. Its key reason to choose it is the combination of one-off sending and ongoing synchronization controls; its key reason to look elsewhere is the non-commercial restriction on Sync 3.0. Businesses should consider Resilio’s commercial options, while users wanting a hosted cloud copy should choose a different kind of service.