What is Project Fluent?
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.
Project Fluent pricing
We don't have Project Fluent's full plan breakdown yet (its pricing page resisted automated reading). Here's what we could confirm. Always check live pricing for exact numbers.
What Project Fluent does
The capabilities that matter for localization i18n, normalised so it lines up with every alternative. “-” means we haven't confirmed it, not that it's missing.
- Cldr plural rules
- ✓
- Rtl bidi support
- ✓
- Translation memory
- ✓
- Glossary terminology
- ✓
- In context editing
- ✗
- Ota updates
- ✗
- Self hostable
- ✓
- Managed translation services
- ✗
- Qa checks
- ✗
Security & compliance
Known vulnerabilities: 0 (0 in the last 12 months) sourcea count reflects scale & disclosure, not quality
Project Fluent FAQ
Common questions about Project Fluent, answered from independent, dated evidence.
What is Project Fluent?
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. It is indexed under Localization I18N.
Source: https://projectfluent.org
Is Project Fluent free to use?
Project Fluent is open source, so it can be self-hosted and used at no licence cost. It is released under the Apache-2.0 licence. Pricing changes often, so verify at source before relying on it.
Source: https://projectfluent.org
Is Project Fluent open source?
Yes. Project Fluent is published under the Apache-2.0 licence, a permissive licence that generally allows commercial use and modification. Licence terms can change between releases, so verify against the repository for the version you intend to use.
Project Fluent 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%
- FormatJSlow · 22%
Compare Project Fluent
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 Project Fluent, not the verdict.
| Signal | Score | Weight | Contribution | Evidence |
|---|---|---|---|---|
| Capabilities | 75 | 0.08 | 6.2 | ✓ |
| Release cadence | 67 | 0.07 | 4.5 | ✓ |
| Stars | 61 | 0.03 | 2.0 | ✓ |
| Security score | 37 | 0.05 | 2.0 | ✓ |
| Integrations | 0 | 0.05 | 0.0 | - |
| Dependent projects | 0 | 0.08 | 0.0 | ✓ |
| Development activity | 0 | 0.12 | 0.0 | ✓ |
| Security posture | 0 | 0.09 | 0.0 | - |
| Package downloads | 0 | 0.17 | 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 | 0 | mediumsource · 2026-09-28 · 65% |
Adoption
Content
| Attribute | Value | Evidence |
|---|---|---|
| Faq | 3 items | mediumsource · 2026-09-10 · 72% |
Features
| Attribute | Value | Evidence |
|---|---|---|
| Capabilities | Self hostable, Rtl bidi support, Cldr plural rules, Translation memory, Glossary terminology | mediumsource · 2026-08-21 · 60% |
Language
| Attribute | Value | Evidence |
|---|---|---|
| Primary | JavaScript | highsource · 2026-09-28 · 90% |
License
| Attribute | Value | Evidence |
|---|---|---|
| Spdx | Apache-2.0 | highsource · 2026-09-28 · 95% |
Pricing
Release
Security
Is Project Fluent the right choice for you?
Tell us the job, the constraints and what you weigh most, and we will rank Project Fluent against the rest of the localization i18n we index, using the same dated evidence weighted your way.
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