Comparing Polyglot and Localazy for developer teams. See how AST-based string detection compares to Localazy's automation-focused translation management.
Localazy is a developer-focused translation management system that emphasizes automation and a good developer experience. It has a free tier, strong CLI tooling, and ShareTM — a community translation memory. Polyglot is a CLI-first tool that starts with detection — finding hardcoded strings in your source code — then translates with LLMs and previews locally.
Both tools market to developers, but they start at different points in the i18n workflow.
| Feature | Polyglot | Localazy |
|---|---|---|
| Hardcoded-string detection (AST-based) | ✓Yes | ✕No |
| AI/LLM translation | ✓Yes, built-in | ✓Yes (Localazy AI + MT, with glossary and context) |
| Local preview | ✓Yes (polyglot preview) | ✕No |
| CI/CD integration | ✓Yes (GitHub Action) | ✓Yes (CLI + GitHub Action) |
| CLI support | Primary interface | ✓Yes (good CLI) |
| Web dashboard | ✓Yes (translation review) | ✓Yes |
| Free tier | Free local scanning, 500 source strings (lifetime) | ✓Yes (200 source keys) |
| Starting price | $0 | $0 (free) / $34/mo billed annually |
| Translation memory | ✓Yes | ✓Yes (ShareTM — community) |
| Glossary support | ✓Yes | ✓Yes |
| Community translations | ✕No | ✓Yes |
| File format support | JSON, YAML, ARB, iOS .strings, Android XML | 50+ formats |
| Editor integration | VS Code extension (inline diagnostics) | ✕No |
| Screenshot context | Local page captures (polyglot screenshot), not linked to keys | ✓Yes (linked to keys) |
Localazy's free plan includes up to 200 source keys and access to ShareTM. For small projects, you might never need to pay.
Localazy's community translation memory pools translations across Localazy users. If another project has already translated "Save changes" to French, you can reuse that translation. It's a distinctive feature and particularly valuable for common UI strings.
Localazy supports 50+ file formats — more than most competitors. JSON, YAML, XLIFF, Android XML, iOS .strings, PHP, Ruby, and many more. If your project uses an uncommon format, Localazy likely supports it.
Localazy has a well-designed CLI, a clean API, and documentation that feels like it was written by developers for developers. The platform genuinely respects developer workflows.
You can upload screenshots linked to translation keys, giving translators visual context for where strings appear.
Polyglot scans your source code with tree-sitter AST parsing and reports untranslated strings. Detection covers Next.js, Astro, SvelteKit, Vue, Angular, React Native and Flutter; runtime support varies by setup, and Next.js App Router with next-intl is the best-tested path. Localazy manages strings you've already extracted into translation files, so finding and wrapping them is up to you.
Polyglot's VS Code extension flags untranslated strings inline as you write code — scan-on-save, a findings sidebar, and wrap actions you review before applying — so missing strings surface in the editor, not after the fact.
Polyglot sends component name, surrounding UI context, and glossary terms alongside each string. Its fine-tuned engine scored 4.96/5 across 49 languages on our June 2026 pipeline, AI-judged — reproducible benchmark.
polyglot preview shows translations in your running app before you deploy. With Localazy, you review translations in its dashboard, with screenshot context.
Polyglot's TM is project-specific, so reuse stays within your product. Localazy's ShareTM is a strength for common strings; if you need TM that stays private, check how ShareTM applies to your plan.
| Polyglot Free | Polyglot Pro | Localazy Free | Localazy Professional | |
|---|---|---|---|---|
| Price | $0 | $49/mo ($39 annual) | $0 | $34/mo billed annually ($41 monthly) |
| String detection | Unlimited (local) | Unlimited (local) | N/A | N/A |
| Translation | 500 source strings (lifetime) | 10,000 source strings (lifetime) | 200 source keys | 1,000 source keys |
| Languages | 2 | 5 | See Localazy pricing | See Localazy pricing |
| Projects | 1 | 3 | — | — |
| TM | Private | Private | ShareTM (community) | ShareTM + private |
| File formats | JSON, YAML, ARB, .strings, XML | Same | 50+ | 50+ |
Localazy's pricing is competitive and transparent. Professional starts at $408/year (about $34/month) for 1,000 source keys, or $41/month billed monthly, and scales with key count. The main trade-off is scope: Localazy manages translations you've already extracted, while Polyglot finds and wraps strings you haven't extracted yet.
Competitor pricing checked September 22, 2026.
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