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Syncthing

Hacker Approved

The most recommended of 14 file sync apps

Free, open-source peer-to-peer sync that keeps files on your own devices without a cloud and runs reliably for years, though mobile support is awkward and devices must be online.

Free, open-source peer-to-peer sync that keeps files on your own devices without a cloud and runs reliably for years, though mobile support is awkward and devices must be online.

254 people gave an opinion

recommend it
212
criticize it
42
approval share
83%
Each figure is 2 people. RecommendsCriticizes

Recommended in 12 of 13 months

  1. November 2025: recommended
  2. December 2025: recommended
  3. January 2026: recommended
  4. February 2026: recommended
  5. March 2026: recommended
  6. April 2026: recommended
  7. May 2026: recommended
  8. June 2026: recommended
  9. July 2026: recommended
  10. August 2026: recommended
  11. September 2026: recommended
  12. October 2026: recommended
  13. November 2026: not recommended (month in progress)

Owned for 5 years

Median of the 6 owners who said how long they have had it.

Each square is one year.

Why it carries the badge

  • 212 people recommend itNeeds 10 or more, met.
  • 5 recommenders for every criticNeeds 2 to 1 or better, met.
  • Recommended in 12 of 13 monthsNeeds 4 or more, met.

The same three rules apply to every product, and the badge can’t be bought. How the badge works

What people say about it

The reasons people give, with the number of comments that give each one. Open a reason to read what they said.

Why people recommend it

Each mark is one comment

  • Reliable background sync for years

    “It's simple to setup and will work forever instead of paying for different providers that might shut down or increase their prices.”

    Comment from 13 Apr 2026 in “An Introduction to Obsidian”

    “Syncthing works very well, its only constraint is that it does need the devices to be often on if you want consistent syncing.”

    Comment from 3 Sep 2026 in “Creating backup storage sucks”

    “Over years with >10k files / 100 gb, I've only ever had conflicts when I actually made conflicting simultaneous changes.”

    Comment from 3 Nov 2025 in “Why Nextcloud feels slow to use”
  • No cloud, data stays yours

    “try using Syncthing on iOS to keep your files synced across devices without having them uploaded to servers you don't control”

    Comment from 20 Nov 2025 in “Android and iPhone users can now share files, starting with the Pixel 10”

    “Syncthing? I'm taking 'offline' to mean 'not requiring the internet', which means you can have plenty of computers!”

    Comment from 7 Apr 2026 in “Show HN: Stop paying for Dropbox/Google Drive, use your own S3 bucket instead”

    “Syncthing is the only app i need for syncing files to home computer. No clouds, just your phone and computer”

    Comment from 27 Apr 2026 in “When Your Digital Life Vanishes”
  • Syncs phones and computers

    “Syncthing is the way! Along with the Material Files app from F-droid, I finally get to have a file based workflow on Android.”

    Comment from 5 Jan 2026 in “During Helene, I Just Wanted a Plain Text Website”

    “Syncthing is wonderful, and does a great job of syncing between an Android phone's photos/videos and a laptop.”

    Comment from 13 Dec 2025 in “Apple has locked my Apple ID, and I have no recourse. A plea for help”

    “auto-syncs between my desktop, laptop, Android tablet, phone and a generic cloud backup folder with SyncThing”

    Comment from 7 Nov 2025 in “Apple is crossing a Steve Jobs red line”
  • Easy backups to NAS

    “Syncthing allows for time based backups folder so nothing can really be lost even in the case of ransomware attack.”

    Comment from 5 Jun 2026 in “Fast Android File Manager that works”

    “I use syncthing to a NAS, and the syncthing data being backed up by the NAS along everything else it contains.”

    Comment from 3 Sep 2026 in “Creating backup storage sucks”

    “You can literally set up SyncThing to stream your on-device backups to your NAS, cloud storage, or whatever.”

    Comment from 28 Dec 2025 in “Gpg.fail”

What people warn about

Each mark is one comment

  • Mobile clients unofficial or discontinued

    “Their official client stopped being developed and while there are options it isn't straightforward”

    Comment from 27 Apr 2026 in “When Your Digital Life Vanishes”

    “much as I love syncthing, I wouldn't recommend it to nontechnical people”

    Comment from 18 May 2026 in “The Quiet Renovation at Bitwarden”

    “You can use Syncthing for local E2EE sync, but it won't work on your mobile due to this. It works fantastic machine to machine.”

    Comment from 15 Apr 2026 in “Fuck the Cloud (2009)”
  • Devices must stay online

    “It sometimes takes a while for them to discover each other, and it of course works better when all the devices are on my home network.”

    Comment from 22 Feb 2026 in “Password managers less secure than promised”

    “Syncthing works very well, its only constraint is that it does need the devices to be often on if you want consistent syncing.”

    Comment from 3 Sep 2026 in “Creating backup storage sucks”

    “there’s no good way to keep syncthing running all the time on iOS, which can lead to sync conflicts.”

    Comment from 21 Feb 2026 in “Password managers less secure than promised”
  • Fiddly setup and maintenance

    “A service running in the background that exposes an "insecure" url for a browser to then open as the only means for GUI interaction with the app is not a great recommendation for everyday users.”

    Comment from 7 Jan 2026 in “Everyone hates OneDrive, Microsofts cloud app that steals and deletes files”

    “Syncthing is definitely (much) more fiddly than using Bitwarden's and Obsidian's ($5/mo) native syncing tools.”

    Comment from 6 Nov 2025 in “Two billion email addresses were exposed”

    “maintaining that turned out to be more effort than my tiny attention span can afford these days”

    Comment from 7 Apr 2026 in “Show HN: Stop paying for Dropbox/Google Drive, use your own S3 bucket instead”
  • Sync conflict files pile up

    “you're always thinking about if you're going to have to clean up a bunch of sync conflict files later”

    Comment from 28 Feb 2026 in “Obsidian Sync now has a headless client”

    “there’s no good way to keep syncthing running all the time on iOS, which can lead to sync conflicts.”

    Comment from 21 Feb 2026 in “Password managers less secure than promised”

    “Something with less config knobs, that 'just works' and handles conflicts more intelligently.”

    Comment from 2 Apr 2026 in “Foxing aspires to be an eBPF-powered replication engine for Linux filesystems”

Other file sync apps people recommend

The four most recommended other file sync apps, with the same counts for each, so you can compare like for like. The tick on each bar marks the 2 to 1 line the badge needs.

Syncthing compared with 4 alternatives
ProductRecommendCriticizeApprovalMonthsOwnedBadge
SyncthingThis page2124283%125 yrs6 ownersApproved
rsync1578565%1224 yrs4 owners—
Nextcloud15412655%123 yrs21 owners—
rclone951388%123 yrs3 ownersApproved
Unison file synchronizer24389%11—Approved
See all 14 file sync apps, ranked

What people said

40 of the 308 comments that mention it, newest first. Each links to the original comment.

“I use it and rely on it, and I haven't opened it in over a month. It works as a background service.”

RecommendsComment from 25 Sep 2026 in “F-Droid 2.0”

“I use syncthing to a NAS, and the syncthing data being backed up by the NAS along everything else it contains.”

RecommendsComment from 3 Sep 2026 in “Creating backup storage sucks”

“Syncthing works very well, its only constraint is that it does need the devices to be often on if you want consistent syncing.”

MixedComment from 3 Sep 2026 in “Creating backup storage sucks”

“it happens automatically in almost real time as soon as the file is saved on one of my machines”

RecommendsComment from 18 Jun 2026 in “Migrating from GNU Stow to Chezmoi”

“Syncthing allows for time based backups folder so nothing can really be lost even in the case of ransomware attack.”

RecommendsComment from 5 Jun 2026 in “Fast Android File Manager that works”

“So as long as my laptop and my desktop are both turned on I can trust they're always fully up-to-sync with each other”

RecommendsComment from 24 May 2026 in “It's time to talk about my writerdeck”

“the syncing is entirely run on your machines; your data never ends up written to someone else's SSD.”

RecommendsComment from 19 May 2026 in “The Quiet Renovation at Bitwarden”

“the most popular third party android app is discontinued (I use the nerdily named syncthing-fork)”

RecommendsComment from 18 May 2026 in “The Quiet Renovation at Bitwarden”

“much as I love syncthing, I wouldn't recommend it to nontechnical people”

MixedComment from 18 May 2026 in “The Quiet Renovation at Bitwarden”

“Their official client stopped being developed and while there are options it isn't straightforward”

MixedComment from 27 Apr 2026 in “When Your Digital Life Vanishes”

“Syncthing is the only app i need for syncing files to home computer. No clouds, just your phone and computer”

RecommendsComment from 27 Apr 2026 in “When Your Digital Life Vanishes”

“You can use Syncthing for local E2EE sync, but it won't work on your mobile due to this. It works fantastic machine to machine.”

MixedComment from 15 Apr 2026 in “Fuck the Cloud (2009)”

“It works perfectly fine if you're user that know how it works. I use it with Syncthing”

MixedComment from 14 Apr 2026 in “Backblaze has stopped backing up your data”

“It's simple to setup and will work forever instead of paying for different providers that might shut down or increase their prices.”

RecommendsComment from 13 Apr 2026 in “An Introduction to Obsidian”

“maintaining that turned out to be more effort than my tiny attention span can afford these days”

CriticizesComment from 7 Apr 2026 in “Show HN: Stop paying for Dropbox/Google Drive, use your own S3 bucket instead”

“Free, opensource, works on computers and phones, can in most cases puncture nat, supports local discovery”

RecommendsComment from 7 Apr 2026 in “Show HN: Stop paying for Dropbox/Google Drive, use your own S3 bucket instead”

“Syncthing? I'm taking 'offline' to mean 'not requiring the internet', which means you can have plenty of computers!”

RecommendsComment from 7 Apr 2026 in “Show HN: Stop paying for Dropbox/Google Drive, use your own S3 bucket instead”

“Something with less config knobs, that 'just works' and handles conflicts more intelligently.”

CriticizesComment from 2 Apr 2026 in “Foxing aspires to be an eBPF-powered replication engine for Linux filesystems”

“im using syncthing to sync freetube's settings/subscriptions between desktop and mobile”

RecommendsComment from 23 Mar 2026 in “GrapheneOS will remain usable by anyone without requiring personal information”

“Syncthing keeps it all synced with my laptop. All working together seamlessly for years.”

RecommendsComment from 22 Mar 2026 in “Show HN: Joonote – A note-taking app on your lock screen and notification panel”

“Syncthing keeps local copies of the files, so editing a photo inside a Synthing folder is like editing a normal file on your computer”

RecommendsComment from 9 Mar 2026 in “My Homelab Setup”

“provides an elegant way of providing some disk for a friend while maintaining privacy of the content”

RecommendsComment from 9 Mar 2026 in “My Homelab Setup”

“you're always thinking about if you're going to have to clean up a bunch of sync conflict files later”

CriticizesComment from 28 Feb 2026 in “Obsidian Sync now has a headless client”

“It sometimes takes a while for them to discover each other, and it of course works better when all the devices are on my home network.”

MixedComment from 22 Feb 2026 in “Password managers less secure than promised”

“there’s no good way to keep syncthing running all the time on iOS, which can lead to sync conflicts.”

CriticizesComment from 21 Feb 2026 in “Password managers less secure than promised”

“you might also consider something like Syncthing for sync without any cloud intermediary”

RecommendsComment from 19 Feb 2026 in “Show HN: An encrypted, local, cross-platform journaling app”

“Syncthing worked fast and basically flawlessly, better than either iCloud or Dropbox in my experience.”

RecommendsComment from 12 Jan 2026 in “The struggle of resizing windows on macOS Tahoe”

“its so much simpler when you have the files stored locally, then syncing between devices is just something that can happen whenever”

RecommendsComment from 12 Jan 2026 in “2026 is the Year of Self-hosting”

“A service running in the background that exposes an "insecure" url for a browser to then open as the only means for GUI interaction with the app is not a great recommendation for everyday users.”

MixedComment from 7 Jan 2026 in “Everyone hates OneDrive, Microsofts cloud app that steals and deletes files”

“Syncthing is the way! Along with the Material Files app from F-droid, I finally get to have a file based workflow on Android.”

RecommendsComment from 5 Jan 2026 in “During Helene, I Just Wanted a Plain Text Website”

“You can literally set up SyncThing to stream your on-device backups to your NAS, cloud storage, or whatever.”

RecommendsComment from 28 Dec 2025 in “Gpg.fail”

“Syncthing is wonderful, and does a great job of syncing between an Android phone's photos/videos and a laptop.”

RecommendsComment from 13 Dec 2025 in “Apple has locked my Apple ID, and I have no recourse. A plea for help”

“Lost interest the momment I found out that all mobile clients for Syncthing are from third parties.”

CriticizesComment from 7 Dec 2025 in “The Syncthing Android drama is exploding”

“Things like Syncthing just aren't good enough if you don't also host a server that is always on.”

CriticizesComment from 26 Nov 2025 in “Surprisingly, Emacs on Android is pretty good”

“try using Syncthing on iOS to keep your files synced across devices without having them uploaded to servers you don't control”

RecommendsComment from 20 Nov 2025 in “Android and iPhone users can now share files, starting with the Pixel 10”

“auto-syncs between my desktop, laptop, Android tablet, phone and a generic cloud backup folder with SyncThing”

RecommendsComment from 7 Nov 2025 in “Apple is crossing a Steve Jobs red line”

“Syncthing is definitely (much) more fiddly than using Bitwarden's and Obsidian's ($5/mo) native syncing tools.”

MixedComment from 6 Nov 2025 in “Two billion email addresses were exposed”

“I have it installed on my immediate family's devices to ensure all the photos are auto-backed-up to our NAS”

RecommendsComment from 3 Nov 2025 in “Why Nextcloud feels slow to use”

“It works well for smaller folders but it slows down to a crawl with folders that contain thousands of files.”

MixedComment from 3 Nov 2025 in “Why Nextcloud feels slow to use”

“Over years with >10k files / 100 gb, I've only ever had conflicts when I actually made conflicting simultaneous changes.”

RecommendsComment from 3 Nov 2025 in “Why Nextcloud feels slow to use”

Counts come from 1,795,640 Hacker News comments, November 2025 to November 2026. How we count. Report a mistake.