Syncthing vs Seafile
Both are alternatives to Dropbox. Here's how they stack up — verified facts, no spin.
Also searched as Seafile vs Syncthing — same comparison, one verdict.
Syncthing keeps your data local by default and Seafile keeps it in the vendor's cloud — for most teams that single fact decides it.
Syncthing
Continuous peer-to-peer file sync with no cloud.
Syncthing keeps folders in sync directly between your own devices, peer-to-peer and encrypted, with no server and no cloud in the middle. It is the purest self-owned option — brilliant for device-to-device sync, though it is sync only, not a sharing suite.
Seafile
Fast, reliable self-hosted file sync and share.
Seafile is an open-source file-sync-and-share platform known for fast, reliable syncing and client-side encryption options. Its Community Edition is self-hostable and a strong choice when raw sync performance matters.
Side by side
10 points of comparison, every one read from a verified field. Green marks the side that wins a row outright. A dash means we do not hold that fact — never that it is zero.
| Syncthing | Seafile | |
|---|---|---|
| Sovereignty ScoreOur transparent 0–100 composite for data ownership and exit cost. | 92 | 86 |
| Open source | Yes | Yes |
| Self-hostable | Yes | Yes |
| Local-first data | Yes | No |
| License | MPL-2.0 | AGPL-3.0 |
| Pricing | Free / open-source | Free self-host (Community Edition); paid Pro tier |
| RAM to run it wellThe figure that actually matters, not the vendor's minimum. | 512 MB | 4 GB |
| Realistic running costWhat the box costs each month if you run it yourself. | $0 if it runs on machines you already own; $6/mo for a small always-on VPS acting as the permanent peer | $18–30/mo, against Dropbox Business per-seat pricing |
| Setup timeHonest first-install estimate, not the marketing quickstart. | 20 minutes | 2 hours |
| Ongoing maintenanceThe part nobody budgets for. | Almost none. Occasional version bumps, and conflict files to clear when two devices edit offline. | Moderate. Its garbage collector must be run periodically or deleted data never actually frees space. |
Syncthing edges it on the Sovereignty Score, but the right pick depends on the trade-offs below.
Weighing both against staying on Dropbox? Is Dropbox free? What it actually costs →
Syncthing
Strengths
- +No server or cloud at all
- +Peer-to-peer and encrypted
- +Very light and reliable
Trade-offs
- −Sync only — no web sharing/links
- −Devices must be online to sync
Seafile
Strengths
- +Fast, reliable sync engine
- +Client-side encryption option
- +Mature clients
Trade-offs
- −Some features are Pro-only
- −Smaller app ecosystem than Nextcloud
Which one fits you
The trade-offs above, turned into a decision. Find the line that describes your team.
Choose Syncthing
if your data should stay on machines you control, and no server or cloud at all.
Choose Seafile
if fast, reliable sync engine.
Neither, yet
if both carry a real cost you should weigh first — sync only — no web sharing/links, and some features are Pro-only. If either of those is a dealbreaker for your team, the shortlist is wrong rather than the choice.
What it takes to run these yourself
Real requirements and honest running costs, not the vendor quickstart.
Syncthing vs Seafile — common questions
Is Syncthing a better fit than Seafile for cloud storage & sync?
It depends on what you are optimising for, and the honest split is this: Syncthing scores 92 to Seafile's 86 on data ownership and exit cost, so it is the safer choice if you care about being able to leave. Seafile earns its place on a different axis — fast, reliable sync engine. Neither is a wrong answer for every team; the table above is the actual comparison.
What happens if we want to switch later?
Syncthing keeps its data local or in open formats, so leaving is an export rather than a negotiation. Seafile is still self-hostable, so the files stay on your server either way — but it is not local-first by design, so check what its export produces before you rely on it.
Can I self-host Syncthing or Seafile?
Both can be self-hosted. The difference is what it costs you in time rather than whether it is possible — see the setup and maintenance rows above.
Are Syncthing and Seafile both alternatives to Dropbox?
Yes — both appear in our Dropbox comparison, which is why they are worth putting side by side. People usually arrive here already having decided to move off Dropbox and now choosing between the two replacements, which is a narrower and much easier question.
More Dropbox head-to-heads
More cloud storage & sync comparisons
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Facts verified 2026-07-18. Licenses and pricing change — spotted something out of date? That's a correction we want.