# ICU vs Project Fluent

| Attribute | ICU | Project Fluent |
|---|---|---|
| **Vioscale score** | 63.6 (24% (low)) | 43.8 (24% (low)) |
| activity.commits_last_30d | 38 | 0 |
| adoption.dependent_repos | 6,271 | 0 |
| adoption.github_stars | 3,586 | 1,674 |
| description.long | ICU is a widely-used open-source library that provides Unicode text handling, internationalization services, and localization support for C, C++, and Java applications. It fills gaps in platform-native Unicode support, enabling portable text processing across operating systems and programming environments. | A localization system that enables translations to use the full range of grammatical features in their target language, including proper handling of plurals, gender, dates, times, numbers, and right-to-left text. |
| features.capabilities | - | `{"qa_checks":false,"ota_updates":false,"self_hostable":true,"rtl_bidi_support":true,"cldr_plural_rules":true,"in_context_editing":false,"translation_memory":true,"glossary_terminology":true,"managed_translation_services":false}` |
| integrations.count | 20 | - |
| integrations.list | `[{"name":"Adobe"},{"name":"Amazon (Kindle)"},{"name":"Apache"},{"name":"Apple"},{"name":"eBay"},{"name":"Google"},{"name":"Chrome"},{"name":"Android"},{"name":"Google Maps"},{"name":"Google Analytics"},{"name":"Gmail"},{"name":"Facebook (HHVM)"},{"name":"Microsoft"},{"name":"Eclipse"},{"name":"FreeBSD"},{"name":"Debian Linux"},{"name":"CouchDB"},{"name":"Firebird RDBMS"},{"name":"ESRI"},{"name":"CERN"}]` | - |
| language.primary | C++ | JavaScript |
| license.spdx | - | Apache-2.0 |
| market.availability | `{"primaryMarkets":[],"availabilityScope":"global","availableCountries":[],"notAvailableCountries":[]}` | - |
| platform.support | `{"cli":true,"ios":true,"mac":true,"web":true,"linux":true,"android":true,"windows":true}` | - |
| pricing | `{"type":"open_source","sourceUrl":"https://icu.unicode.org","retrievedAt":"2026-08-19T14:45:32.725Z"}` | `{"type":"open_source","sourceUrl":"https://projectfluent.org","retrievedAt":"2026-08-21T13:20:47.821Z"}` |
| pricing.model | commercial | commercial |
| pricing.price_level | free | free |
| release.cadence_days | 44 | 59 |
| release.history | `[{"url":"https://github.com/unicode-org/icu/releases/tag/icu4x/2026-07-01/79.x","date":"2026-07-01T09:30:18Z","type":"prerelease","version":"icu4x/2026-07-01/79.x"},{"url":"https://github.com/unicode-org/icu/releases/tag/release-78.3","date":"2026-03-17T20:23:47Z","type":"stable","version":"release-78.3"},{"url":"https://github.com/unicode-org/icu/releases/tag/release-78.2","date":"2026-01-09T00:38:52Z","type":"stable","version":"release-78.2"},{"url":"https://github.com/unicode-org/icu/releases/tag/release-78.1","date":"2025-10-30T17:21:37Z","type":"stable","version":"release-78.1"},{"url":"https://github.com/unicode-org/icu/releases/tag/release-78.1rc","date":"2025-10-03T19:33:43Z","type":"prerelease","version":"release-78.1rc"},{"url":"https://github.com/unicode-org/icu/releases/tag/icu4x/2025-05-21/77.x","date":"2025-05-21T08:57:05Z","type":"prerelease","version":"icu4x/2025-05-21/77.x"},{"url":"https://github.com/unicode-org/icu/releases/tag/icu4x/2025-05-01/77.x","date":"2025-05-01T18:43:02Z","type":"prerelease","version":"icu4x/2025-05-01/77.x"},{"url":"https://github.com/unicode-org/icu/releases/tag/release-77-1","date":"2025-03-13T18:00:27Z","type":"stable","version":"release-77-1"},{"url":"https://github.com/unicode-org/icu/releases/tag/release-77-rc","date":"2025-02-21T21:42:35Z","type":"prerelease","version":"release-77-rc"},{"url":"https://github.com/unicode-org/icu/releases/tag/icu4x/2024-12-16/76.x","date":"2024-12-16T20:27:12Z","type":"prerelease","version":"icu4x/2024-12-16/76.x"},{"url":"https://github.com/unicode-org/icu/releases/tag/release-76-1","date":"2024-10-24T17:22:31Z","type":"stable","version":"release-76-1"},{"url":"https://github.com/unicode-org/icu/releases/tag/release-76-rc","date":"2024-09-30T21:35:03Z","type":"prerelease","version":"release-76-rc"},{"url":"https://github.com/unicode-org/icu/releases/tag/icu4x/2024-05-16/75.x","date":"2024-05-16T23:41:40Z","type":"prerelease","version":"icu4x/2024-05-16/75.x"},{"url":"https://github.com/unicode-org/icu/releases/tag/icu4x/2024-05-03/75.x","date":"2024-05-03T21:18:50Z","type":"prerelease","version":"icu4x/2024-05-03/75.x"},{"url":"https://github.com/unicode-org/icu/releases/tag/release-75-1","date":"2024-04-16T00:57:15Z","type":"stable","version":"release-75-1"},{"url":"https://github.com/unicode-org/icu/releases/tag/release-75-rc","date":"2024-03-29T00:25:41Z","type":"prerelease","version":"release-75-rc"},{"url":"https://github.com/unicode-org/icu/releases/tag/release-74-2","date":"2023-12-11T19:06:58Z","type":"stable","version":"release-74-2"},{"url":"https://github.com/unicode-org/icu/releases/tag/release-74-1","date":"2023-10-27T23:28:23Z","type":"stable","version":"release-74-1"},{"url":"https://github.com/unicode-org/icu/releases/tag/release-74-rc","date":"2023-10-05T21:31:47Z","type":"prerelease","version":"release-74-rc"},{"url":"https://github.com/unicode-org/icu/releases/tag/cldr/2023-09-27","date":"2023-09-27T18:31:26Z","type":"prerelease","version":"cldr/2023-09-27"}]` | `[{"url":"https://github.com/projectfluent/fluent/releases/tag/v1.0.0","date":"2019-04-17T07:18:15Z","type":"stable","version":"v1.0.0"},{"url":"https://github.com/projectfluent/fluent/releases/tag/v0.9.0","date":"2019-03-26T12:55:42Z","type":"prerelease","version":"v0.9.0"},{"url":"https://github.com/projectfluent/fluent/releases/tag/v0.8.0","date":"2018-12-13T14:50:15Z","type":"prerelease","version":"v0.8.0"},{"url":"https://github.com/projectfluent/fluent/releases/tag/v0.7.0","date":"2018-10-15T14:32:25Z","type":"prerelease","version":"v0.7.0"},{"url":"https://github.com/projectfluent/fluent/releases/tag/v0.6.0","date":"2018-07-24T15:30:56Z","type":"prerelease","version":"v0.6.0"},{"url":"https://github.com/projectfluent/fluent/releases/tag/v0.5.0","date":"2018-01-31T18:46:29Z","type":"prerelease","version":"v0.5.0"},{"url":"https://github.com/projectfluent/fluent/releases/tag/v0.4.0","date":"2017-11-14T13:06:28Z","type":"prerelease","version":"v0.4.0"},{"url":"https://github.com/projectfluent/fluent/releases/tag/v0.3.0","date":"2017-10-18T10:17:03Z","type":"prerelease","version":"v0.3.0"},{"url":"https://github.com/projectfluent/fluent/releases/tag/v0.2.0","date":"2017-10-18T10:16:33Z","type":"prerelease","version":"v0.2.0"},{"url":"https://github.com/projectfluent/fluent/releases/tag/v0.1.0","date":"2017-10-18T10:15:50Z","type":"prerelease","version":"v0.1.0"}]` |
| security.scorecard | 8.9 | 3.7 |
| security.vulnerabilities | `{"count":0,"source":"https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=maven&package_name=com.ibm.icu%3Aicu4j&per_page=100","last_12m":0,"max_severity":null}` | `{"count":0,"source":"https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=go&package_name=github.com%2Fprojectfluent%2Ffluent&per_page=100","last_12m":0,"max_severity":null}` |

## Capabilities (Localization I18N)

| Capability | ICU | Project Fluent |
|---|:--:|:--:|
| **Capabilities** |  |  |
| Cldr plural rules | - | ✓ |
| Rtl bidi support | - | ✓ |
| Translation memory | - | ✓ |
| Glossary terminology | - | ✓ |
| In context editing | - | ✗ |
| Ota updates | - | ✗ |
| Self hostable | - | ✓ |
| Managed translation services | - | ✗ |
| Qa checks | - | ✗ |

*Source: Vioscale. Generated 2026-09-01T17:10:28.376Z. "-" = undocumented, not absent.*