# Syncthing vs Unison

| Attribute | Syncthing | Unison |
|---|---|---|
| **Vioscale score** | 67.5 (31% (low)) | 56.3 (26% (low)) |
| activity.commits_last_30d | 35 | 3 |
| adoption.dependent_repos | 175 | - |
| adoption.github_stars | 88,008 | 5,455 |
| deployment.options | `{"on_prem":true,"self_hosted":true}` | `{"self_hosted":true}` |
| description.long | Syncthing automatically synchronizes files between multiple computers in real-time while encrypting all communication and storing data only on your own devices. It operates without central servers, giving you complete privacy and control over where your data is stored and who can access it. | Unison is an open-source utility that maintains two replicas of files and directories across separate hosts or storage devices, automatically propagating non-conflicting changes while detecting conflicting updates. It works over internet connections including slow links, and allows offline access to already-synchronized data. |
| features.capabilities | `{"pricing_model":"free_open_source","deployment_model":"p2p_client","peer_to_peer_p2p_network_routing":true,"aws_s3_azure_blob_external_mounts":false,"active_directory_ldap_identity_sync":false,"self_hosted_linux_docker_deployment":true,"client_server_architecture_cloud_host":false,"end_to_end_encryption_keys_in_transit":true}` | `{"pricing_model":"free_open_source","deployment_model":"self_hosted","peer_to_peer_p2p_network_routing":true,"self_hosted_linux_docker_deployment":true,"block_level_delta_sync_transfer_speed":true,"client_server_architecture_cloud_host":false,"version_history_and_conflict_resolution":true}` |
| language.primary | Go | OCaml |
| license.spdx | MPL-2.0 | GPL-3.0 |
| market.availability | - | `{"primaryMarkets":[],"availabilityScope":"global","availableCountries":[],"notAvailableCountries":[]}` |
| platform.support | `{"cli":true,"mac":true,"web":true,"linux":true,"windows":true}` | `{"cli":true,"mac":true,"linux":true,"windows":true}` |
| pricing | `{"type":"open_source","summary":"Free and open source","freeTier":true,"sourceUrl":"https://syncthing.net","retrievedAt":"2026-08-21T12:45:46.864Z"}` | `{"type":"free","summary":"Free and open source","freeTier":true,"sourceUrl":"https://github.com/pricing","retrievedAt":"2026-08-21T13:41:35.717Z"}` |
| pricing.free_tier | yes | yes |
| pricing.model | commercial | commercial |
| pricing.price_level | free | free |
| pricing.transparent | yes | yes |
| release.cadence_days | 9 | 132 |
| release.history | `[{"url":"https://github.com/syncthing/syncthing/releases/tag/v2.1.4-rc.2","date":"2026-08-24T19:15:28Z","type":"prerelease","version":"v2.1.4-rc.2"},{"url":"https://github.com/syncthing/syncthing/releases/tag/v2.1.4-rc.1","date":"2026-08-19T10:39:46Z","type":"prerelease","version":"v2.1.4-rc.1"},{"url":"https://github.com/syncthing/syncthing/releases/tag/v2.1.3","date":"2026-08-05T13:06:38Z","type":"stable","version":"v2.1.3"},{"url":"https://github.com/syncthing/syncthing/releases/tag/v2.1.3-rc.3","date":"2026-08-03T22:03:26Z","type":"prerelease","version":"v2.1.3-rc.3"},{"url":"https://github.com/syncthing/syncthing/releases/tag/v2.1.3-rc.2","date":"2026-07-28T06:32:24Z","type":"prerelease","version":"v2.1.3-rc.2"},{"url":"https://github.com/syncthing/syncthing/releases/tag/v2.1.3-rc.1","date":"2026-07-21T05:03:07Z","type":"prerelease","version":"v2.1.3-rc.1"},{"url":"https://github.com/syncthing/syncthing/releases/tag/v2.1.2","date":"2026-07-08T13:43:41Z","type":"stable","version":"v2.1.2"},{"url":"https://github.com/syncthing/syncthing/releases/tag/v2.1.2-rc.4","date":"2026-06-26T06:04:03Z","type":"prerelease","version":"v2.1.2-rc.4"},{"url":"https://github.com/syncthing/syncthing/releases/tag/v2.1.2-rc.3","date":"2026-06-23T10:04:39Z","type":"prerelease","version":"v2.1.2-rc.3"},{"url":"https://github.com/syncthing/syncthing/releases/tag/v2.1.2-rc.2","date":"2026-06-13T06:47:21Z","type":"prerelease","version":"v2.1.2-rc.2"},{"url":"https://github.com/syncthing/syncthing/releases/tag/v2.1.2-rc.1","date":"2026-06-12T07:20:25Z","type":"prerelease","version":"v2.1.2-rc.1"},{"url":"https://github.com/syncthing/syncthing/releases/tag/v2.1.1","date":"2026-06-02T11:50:30Z","type":"stable","version":"v2.1.1"},{"url":"https://github.com/syncthing/syncthing/releases/tag/v2.1.1-rc.1","date":"2026-05-25T13:35:09Z","type":"prerelease","version":"v2.1.1-rc.1"},{"url":"https://github.com/syncthing/syncthing/releases/tag/v2.1.0","date":"2026-05-12T06:46:04Z","type":"stable","version":"v2.1.0"},{"url":"https://github.com/syncthing/syncthing/releases/tag/v2.1.0-rc.2","date":"2026-05-09T11:51:47Z","type":"prerelease","version":"v2.1.0-rc.2"},{"url":"https://github.com/syncthing/syncthing/releases/tag/v2.1.0-rc.1","date":"2026-04-26T10:46:18Z","type":"prerelease","version":"v2.1.0-rc.1"},{"url":"https://github.com/syncthing/syncthing/releases/tag/v2.0.16","date":"2026-04-07T14:45:12Z","type":"stable","version":"v2.0.16"},{"url":"https://github.com/syncthing/syncthing/releases/tag/v2.0.16-rc.2","date":"2026-03-13T14:19:28Z","type":"prerelease","version":"v2.0.16-rc.2"},{"url":"https://github.com/syncthing/syncthing/releases/tag/v2.0.16-rc.1","date":"2026-03-03T22:34:38Z","type":"prerelease","version":"v2.0.16-rc.1"},{"url":"https://github.com/syncthing/syncthing/releases/tag/v2.0.15","date":"2026-03-03T08:50:59Z","type":"stable","version":"v2.0.15"}]` | `[{"url":"https://github.com/bcpierce00/unison/releases/tag/v2.54.0","date":"2026-05-01T00:33:56Z","type":"stable","version":"v2.54.0"},{"url":"https://github.com/bcpierce00/unison/releases/tag/v2.53.8","date":"2025-11-05T00:07:47Z","type":"stable","version":"v2.53.8"},{"url":"https://github.com/bcpierce00/unison/releases/tag/v2.53.7","date":"2024-11-05T13:41:24Z","type":"stable","version":"v2.53.7"},{"url":"https://github.com/bcpierce00/unison/releases/tag/v2.53.6","date":"2024-11-05T00:44:16Z","type":"stable","version":"v2.53.6"},{"url":"https://github.com/bcpierce00/unison/releases/tag/v2.53.5","date":"2024-05-07T01:32:03Z","type":"stable","version":"v2.53.5"},{"url":"https://github.com/bcpierce00/unison/releases/tag/v2.53.4","date":"2024-02-19T17:52:38Z","type":"stable","version":"v2.53.4"},{"url":"https://github.com/bcpierce00/unison/releases/tag/v2.53.3","date":"2023-04-28T00:28:36Z","type":"stable","version":"v2.53.3"},{"url":"https://github.com/bcpierce00/unison/releases/tag/v2.53.2","date":"2023-03-20T17:39:53Z","type":"stable","version":"v2.53.2"},{"url":"https://github.com/bcpierce00/unison/releases/tag/v2.53.1","date":"2023-03-19T12:42:03Z","type":"stable","version":"v2.53.1"},{"url":"https://github.com/bcpierce00/unison/releases/tag/v2.53.0","date":"2022-11-07T11:34:26Z","type":"stable","version":"v2.53.0"},{"url":"https://github.com/bcpierce00/unison/releases/tag/v2.52.1","date":"2022-05-08T12:26:58Z","type":"stable","version":"v2.52.1"},{"url":"https://github.com/bcpierce00/unison/releases/tag/v2.52.0","date":"2022-03-12T19:12:50Z","type":"stable","version":"v2.52.0"},{"url":"https://github.com/bcpierce00/unison/releases/tag/v2.51.5","date":"2021-12-18T15:51:34Z","type":"stable","version":"v2.51.5"},{"url":"https://github.com/bcpierce00/unison/releases/tag/v2.51.4","date":"2021-06-24T14:50:25Z","type":"stable","version":"v2.51.4"},{"url":"https://github.com/bcpierce00/unison/releases/tag/v2.51.3","date":"2020-10-21T13:15:46Z","type":"stable","version":"v2.51.3"},{"url":"https://github.com/bcpierce00/unison/releases/tag/v2.51.2","date":"2018-01-27T21:19:26Z","type":"stable","version":"v2.51.2"},{"url":"https://github.com/bcpierce00/unison/releases/tag/v2.48.15v4","date":"2017-12-18T12:25:51Z","type":"stable","version":"v2.48.15v4"},{"url":"https://github.com/bcpierce00/unison/releases/tag/v2.51.0","date":"2017-11-24T21:50:05Z","type":"stable","version":"v2.51.0"},{"url":"https://github.com/bcpierce00/unison/releases/tag/2.48.4","date":"2016-09-29T12:39:45Z","type":"stable","version":"2.48.4"},{"url":"https://github.com/bcpierce00/unison/releases/tag/2.48.3","date":"2016-09-29T12:37:20Z","type":"stable","version":"2.48.3"}]` |
| security.scorecard | 5.8 | 4.5 |
| security.vulnerabilities | `{"count":3,"source":"https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=go&package_name=github.com%2Fsyncthing%2Fsyncthing&per_page=100","last_12m":0,"max_severity":"HIGH"}` | - |

## Capabilities (File Sync)

| Capability | Syncthing | Unison |
|---|:--:|:--:|
| **Capabilities** |  |  |
| Deployment model | P2p client | Self hosted |
| Peer to peer p2p network routing | ✓ | ✓ |
| Client server architecture cloud host | ✗ | ✗ |
| Block level delta sync transfer speed | - | ✓ |
| Self hosted linux docker deployment | ✓ | ✓ |
| Synology qnap nas hardware integration | - | - |
| Aws s3 azure blob external mounts | ✗ | - |
| Active directory ldap identity sync | ✗ | - |
| Version history and conflict resolution | - | ✓ |
| End to end encryption keys in transit | ✓ | - |
| SOC2 type ii | - | - |
| ISO 27001 | - | - |
| Pricing model | Free open source | Free open source |

*Source: Vioscale. Generated 2026-09-01T16:34:54.050Z. "-" = undocumented, not absent.*