# SigmaOS vs Zen Browser

| Attribute | SigmaOS | Zen Browser |
|---|---|---|
| **Vioscale score** | 66.9 (26% (low)) | 45 (23% (low)) |
| activity.commits_last_30d | - | 68 |
| adoption.dependent_repos | - | 0 |
| adoption.github_stars | - | 44,098 |
| deployment.options | - | `{"self_hosted":true}` |
| description.long | A macOS web browser focused on reducing digital distractions through ad-free browsing and streamlined navigation, built on WebKit for performance and privacy while supporting Chromium extensions. | A Firefox-based browser that eliminates telemetry and tracking while offering productivity tools like split-view tabs, workspace organization, and website customization without collecting or sharing user data. |
| integrations.count | 4 | 2 |
| integrations.list | `[{"name":"Grammarly"},{"name":"LastPass"},{"name":"Honey"},{"name":"Todoist"}]` | `[{"name":"GitHub"},{"name":"RSS feeds"}]` |
| language.primary | - | C++ |
| license.spdx | - | MPL-2.0 |
| market.availability | `{"primaryMarkets":["US"],"availabilityScope":"global","availableCountries":[],"notAvailableCountries":[]}` | - |
| platform.support | `{"mac":true}` | `{"mac":true,"linux":true,"windows":true}` |
| pricing | `{"type":"hybrid","plans":[{"free":true,"name":"Personal","summary":"Free forever","features":["Ad-free browsing","One-click navigation","Tab locking and renaming","Chromium extension support","RAM optimization","Intelligent Tracking Protection","WebKit security"],"components":[{"kind":"fixed","amount":0,"period":"month","currency":"USD"}],"description":"Free forever with core browser features","contactSales":false},{"free":false,"name":"Pro","summary":"$20/month (50% discount for students and educators)","features":["All Personal features","Unlimited Airis usage"],"commitment":"monthly","components":[{"kind":"fixed","amount":20,"period":"month","currency":"USD"}],"description":"Enhanced features with unlimited Airis usage","contactSales":false}],"summary":"Free tier; Pro at $20/month with 50% student/educator discount","currency":"USD","freeTier":true,"sourceUrl":"https://sigmaos.com","retrievedAt":"2026-08-18T22:05:48.581Z","startingPrice":{"amount":20,"period":"month","currency":"USD"},"billingPeriods":["month"]}` | `{"type":"open_source","summary":"Free and open-source","freeTier":true,"sourceUrl":"https://zen-browser.app","retrievedAt":"2026-08-20T16:35:39.627Z"}` |
| pricing.free_tier | yes | yes |
| pricing.model | freemium | open_source |
| pricing.price_level | mid | free |
| pricing.starting_price | `{"amount":20,"currency":"USD"}` | - |
| pricing.transparent | yes | yes |
| release.cadence_days | - | 5 |
| release.history | - | `[{"url":"https://github.com/zen-browser/desktop/releases/tag/1.21.15b","date":"2026-08-19T17:13:06Z","type":"stable","version":"1.21.15b"},{"url":"https://github.com/zen-browser/desktop/releases/tag/1.21.14b","date":"2026-08-13T16:18:49Z","type":"stable","version":"1.21.14b"},{"url":"https://github.com/zen-browser/desktop/releases/tag/1.21.13b","date":"2026-08-10T06:52:08Z","type":"stable","version":"1.21.13b"},{"url":"https://github.com/zen-browser/desktop/releases/tag/1.21.12b","date":"2026-08-07T10:40:20Z","type":"stable","version":"1.21.12b"},{"url":"https://github.com/zen-browser/desktop/releases/tag/1.21.11b","date":"2026-08-06T14:58:54Z","type":"stable","version":"1.21.11b"},{"url":"https://github.com/zen-browser/desktop/releases/tag/1.21.10b","date":"2026-07-30T16:50:56Z","type":"stable","version":"1.21.10b"},{"url":"https://github.com/zen-browser/desktop/releases/tag/1.21.9b","date":"2026-07-25T13:15:59Z","type":"stable","version":"1.21.9b"},{"url":"https://github.com/zen-browser/desktop/releases/tag/1.21.8b","date":"2026-07-17T10:25:13Z","type":"stable","version":"1.21.8b"},{"url":"https://github.com/zen-browser/desktop/releases/tag/1.21.7b","date":"2026-07-15T21:53:55Z","type":"stable","version":"1.21.7b"},{"url":"https://github.com/zen-browser/desktop/releases/tag/1.21.6b","date":"2026-07-09T10:46:23Z","type":"stable","version":"1.21.6b"},{"url":"https://github.com/zen-browser/desktop/releases/tag/1.21.5b","date":"2026-07-02T22:45:01Z","type":"stable","version":"1.21.5b"},{"url":"https://github.com/zen-browser/desktop/releases/tag/1.21.4b","date":"2026-06-27T09:26:34Z","type":"stable","version":"1.21.4b"},{"url":"https://github.com/zen-browser/desktop/releases/tag/1.21.3b","date":"2026-06-18T22:02:06Z","type":"stable","version":"1.21.3b"},{"url":"https://github.com/zen-browser/desktop/releases/tag/1.21.2b","date":"2026-06-17T21:34:13Z","type":"stable","version":"1.21.2b"},{"url":"https://github.com/zen-browser/desktop/releases/tag/1.21.1b","date":"2026-06-13T12:22:55Z","type":"stable","version":"1.21.1b"},{"url":"https://github.com/zen-browser/desktop/releases/tag/1.21b","date":"2026-06-11T05:58:04Z","type":"stable","version":"1.21b"},{"url":"https://github.com/zen-browser/desktop/releases/tag/1.20.2b","date":"2026-06-04T09:23:36Z","type":"stable","version":"1.20.2b"},{"url":"https://github.com/zen-browser/desktop/releases/tag/1.20.1b","date":"2026-05-27T21:12:27Z","type":"stable","version":"1.20.1b"},{"url":"https://github.com/zen-browser/desktop/releases/tag/1.20b","date":"2026-05-24T18:46:35Z","type":"stable","version":"1.20b"},{"url":"https://github.com/zen-browser/desktop/releases/tag/1.19.13b","date":"2026-05-14T21:56:48Z","type":"stable","version":"1.19.13b"}]` |
| security.vulnerabilities | - | `{"count":0,"source":"https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=go&package_name=github.com%2Fzen-browser%2Fdesktop&per_page=100","last_12m":0,"max_severity":null}` |

## Capabilities (Browser Productivity)

| Capability | SigmaOS | Zen Browser |
|---|:--:|:--:|
| **Capabilities** |  |  |
| Deployment model | - | - |
| Chrome extension webstore compatibility | - | - |
| Vertical tab sidebar layout | - | - |
| Split screen web panels in single window | - | - |
| Multi account cookie isolation containers | - | - |
| Cmd k command palette global search | - | - |
| Native ad and tracker blocking engine | - | - |
| Collaborative shared workspaces and folders | - | - |
| Memory suspension inactive tab freezing | - | - |
| Generative AI LLM page summarization | - | - |
| SOC2 type ii | - | - |
| ISO 27001 | - | - |
| Pricing model | - | - |

*Source: Vioscale. Generated 2026-09-01T16:58:04.882Z. "-" = undocumented, not absent.*