# FormatJS vs ICU

| Attribute | FormatJS | ICU |
|---|---|---|
| **vioscaleAI score** | 56.6 (22% (low)) | 57.8 (53% (medium)) |
| activity.commits_last_30d | 100 | 63 |
| adoption.dependent_repos | 57,947 | 6,271 |
| adoption.github_stars | 14,741 | 3,616 |
| content.faq | - | `[{"answer":"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. It is indexed under Localization I18N.","source":"https://icu.unicode.org","question":"What is ICU?","confidence":0.6},{"answer":"ICU is open source, so it can be self-hosted and used at no licence cost. Pricing changes often, so verify at source before relying on it.","source":"https://icu.unicode.org","question":"Is ICU free to use?","confidence":0.6},{"answer":"ICU supports the web, Windows, macOS, Linux, iOS, Android and a command-line interface. Platforms we have not confirmed are simply not listed here rather than ruled out.","source":"https://icu.unicode.org","question":"What platforms does ICU support?","confidence":0.6},{"answer":"We have confirmed 18 integrations for ICU, including Adobe, Amazon (Kindle), Apache, Apple, eBay, Google, Chrome and Android, plus 10 more. This is what we could verify from public sources, so the vendor may support others we have not indexed.","source":"https://icu.unicode.org","question":"What does ICU integrate with?","confidence":0.6}]` |
| description.long | A monorepo hosting FormatJS libraries, with react-intl as a primary component. Provides tools for implementing internationalization and localization functionality in JavaScript applications. | 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. |
| features.capabilities | - | `{"cldr_plural_rules":true}` |
| 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 | TypeScript | C++ |
| market.availability | - | `{"primaryMarkets":[],"availabilityScope":"global","availableCountries":[],"notAvailableCountries":[]}` |
| platform.support | `{"cli":true}` | `{"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"}` |
| pricing.model | commercial | commercial |
| pricing.price_level | - | free |
| release.cadence_days | - | 49 |
| release.history | `[{"url":"https://github.com/formatjs/formatjs/releases/tag/formatjs_intl_v2.2.0","date":"2026-10-11T03:13:05Z","type":"stable","version":"formatjs_intl_v2.2.0"},{"url":"https://github.com/formatjs/formatjs/releases/tag/formatjs_icu_messageformat_v0.3.0","date":"2026-10-11T03:13:04Z","type":"stable","version":"formatjs_icu_messageformat_v0.3.0"},{"url":"https://github.com/formatjs/formatjs/releases/tag/formatjs_intl_v2.1.0","date":"2026-10-09T12:56:15Z","type":"stable","version":"formatjs_intl_v2.1.0"},{"url":"https://github.com/formatjs/formatjs/releases/tag/formatjs_intl_macros_v1.1.0","date":"2026-10-09T12:56:14Z","type":"stable","version":"formatjs_intl_macros_v1.1.0"},{"url":"https://github.com/formatjs/formatjs/releases/tag/formatjs_icu_messageformat_v0.2.0","date":"2026-10-09T12:56:12Z","type":"stable","version":"formatjs_icu_messageformat_v0.2.0"},{"url":"https://github.com/formatjs/formatjs/releases/tag/formatjs_icu_messageformat_parser_v1.1.0","date":"2026-10-09T12:56:10Z","type":"stable","version":"formatjs_icu_messageformat_parser_v1.1.0"},{"url":"https://github.com/formatjs/formatjs/releases/tag/formatjs_cli_v1.8.1","date":"2026-10-09T12:56:16Z","type":"stable","version":"formatjs_cli_v1.8.1"},{"url":"https://github.com/formatjs/formatjs/releases/tag/%40formatjs/cli%406.16.34","date":"2026-10-09T12:56:09Z","type":"stable","version":"@formatjs/cli@6.16.34"},{"url":"https://github.com/formatjs/formatjs/releases/tag/%40formatjs/cli-native-win32-x64%401.1.29","date":"2026-10-09T12:56:08Z","type":"stable","version":"@formatjs/cli-native-win32-x64@1.1.29"},{"url":"https://github.com/formatjs/formatjs/releases/tag/%40formatjs/cli-native-linux-x64%401.1.28","date":"2026-10-09T12:56:06Z","type":"stable","version":"@formatjs/cli-native-linux-x64@1.1.28"},{"url":"https://github.com/formatjs/formatjs/releases/tag/%40formatjs/cli-native-linux-x64-musl%401.0.26","date":"2026-10-09T12:56:07Z","type":"stable","version":"@formatjs/cli-native-linux-x64-musl@1.0.26"},{"url":"https://github.com/formatjs/formatjs/releases/tag/%40formatjs/cli-native-linux-arm64%401.2.28","date":"2026-10-09T12:56:03Z","type":"stable","version":"@formatjs/cli-native-linux-arm64@1.2.28"},{"url":"https://github.com/formatjs/formatjs/releases/tag/%40formatjs/cli-native-linux-arm64-musl%401.0.26","date":"2026-10-09T12:56:04Z","type":"stable","version":"@formatjs/cli-native-linux-arm64-musl@1.0.26"},{"url":"https://github.com/formatjs/formatjs/releases/tag/%40formatjs/cli-native-darwin-arm64%401.1.28","date":"2026-10-09T12:56:02Z","type":"stable","version":"@formatjs/cli-native-darwin-arm64@1.1.28"},{"url":"https://github.com/formatjs/formatjs/releases/tag/%40formatjs/cli-lib%4010.0.10","date":"2026-10-09T12:56:01Z","type":"stable","version":"@formatjs/cli-lib@10.0.10"},{"url":"https://github.com/formatjs/formatjs/releases/tag/vue-intl%408.1.3","date":"2026-10-05T16:55:54Z","type":"stable","version":"vue-intl@8.1.3"},{"url":"https://github.com/formatjs/formatjs/releases/tag/react-intl%4012.1.4","date":"2026-10-05T16:55:49Z","type":"stable","version":"react-intl@12.1.4"},{"url":"https://github.com/formatjs/formatjs/releases/tag/intl-messageformat%4012.1.3","date":"2026-10-05T16:55:47Z","type":"stable","version":"intl-messageformat@12.1.3"},{"url":"https://github.com/formatjs/formatjs/releases/tag/formatjs_cli_v1.8.0","date":"2026-10-05T16:55:55Z","type":"stable","version":"formatjs_cli_v1.8.0"},{"url":"https://github.com/formatjs/formatjs/releases/tag/eslint-plugin-formatjs%408.1.1","date":"2026-10-05T16:55:43Z","type":"stable","version":"eslint-plugin-formatjs@8.1.1"}]` | `[{"url":"https://github.com/unicode-org/icu/releases/tag/release-79.1rc","date":"2026-09-25T22:25:32Z","type":"prerelease","version":"release-79.1rc"},{"url":"https://github.com/unicode-org/icu/releases/tag/icu4x/2026-08-31/79.x","date":"2026-08-31T14:50:55Z","type":"prerelease","version":"icu4x/2026-08-31/79.x"},{"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"}]` |
| security.scorecard | 4.3 | 9 |
| security.vulnerabilities | `{"count":0,"source":"https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=npm&package_name=react-intl&per_page=100","last_12m":0,"max_severity":null}` | `{"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}` |

## Capabilities (Localization I18N)

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

*Source: vioscaleAI. Generated 2026-10-16T18:59:34.317Z. "-" = undocumented, not absent.*