What is FormatJS?
A monorepo hosting FormatJS libraries, with react-intl as a primary component. Provides tools for implementing internationalization and localization functionality in JavaScript applications.
Platform & deployment
Independently observed- CLI
Security & compliance
Known vulnerabilities: 0 (0 in the last 12 months) sourcea count reflects scale & disclosure, not quality
FormatJS alternatives
Other localization i18n we track, ranked by the same independent score.
- TransifexAn AI-powered localization platform that enables rapid, cost-effective translation and deployment across global markets without proportional increases in operatmedium · 73%
- LokaliseCloud-based translation management solution enabling teams to localize software through file-based workflows and API accessmedium · 71%
- ICUmedium · 53%
- CrowdinAn AI-powered platform for automating translations and managing multilingual content across productsmedium · 73%
- i18nextA JavaScript library for managing multi-language support in web applications with consistent translation across frameworksmedium · 62%
- WeblatePrivacy-focused, open source localization platform for collaborative translation workflowslow · 39%
Compare FormatJS
Side by side against other localization i18n, attribute by attribute, with a source on every value.
The vioscaleAI score: one lens on the evidence
Not user reviews and not a paid placement: a confidence-weighted blend of the independent signals below (adoption, activity, security posture, and more), which you can sort and re-weight yourself. Vendors can correct their listing but can never move their rank, and stars are weighted low as a vanity metric. It is one way to read the evidence for FormatJS, not the verdict.
| Signal | Score | Weight | Contribution | Evidence |
|---|---|---|---|---|
| Development activity | 63 | 0.12 | 7.6 | ✓ |
| Dependent projects | 79 | 0.08 | 6.4 | ✓ |
| Stars | 79 | 0.03 | 2.6 | ✓ |
| Security score | 43 | 0.05 | 2.3 | ✓ |
| Price level | 0 | 0.04 | 0.0 | - |
| Reliability | 0 | 0.05 | 0.0 | - |
| Capabilities | 0 | 0.10 | 0.0 | - |
| Integrations | 0 | 0.05 | 0.0 | - |
| Release cadence | 0 | 0.07 | 0.0 | - |
| Security posture | 0 | 0.09 | 0.0 | - |
| Package downloads | 0 | 0.17 | 0.0 | - |
| Pricing transparency | 0 | 0.05 | 0.0 | - |
| Developer Q&A activity | 0 | 0.08 | 0.0 | - |
Computed . Re-weight it by intent, or see the full method.
All data & sourcesshow ↓
Every value we hold, with its source, retrieval date, and confidence. This is the evidence behind the score: don't trust it, verify it.
Activity
| Attribute | Value | Evidence |
|---|---|---|
| Commits last 30d | 100 | mediumsource · 2026-10-15 · 65% |
Adoption
Language
| Attribute | Value | Evidence |
|---|---|---|
| Primary | TypeScript | highsource · 2026-10-15 · 90% |
Pricing
| Attribute | Value | Evidence |
|---|---|---|
| Model | commercial | mediumsource · 2026-10-15 · 60% |
Release
| Attribute | Value | Evidence |
|---|---|---|
| History | 20 items | mediumsource · 2026-10-15 · 70% |
Security
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