A side-by-side comparison of Polyglot and Crowdin for developers at small teams. Compare features, pricing, and workflows.
Both Polyglot and Crowdin help teams translate their software into multiple languages. Crowdin is an established translation management system (TMS) built around a web dashboard, while Polyglot is a CLI-first tool that detects untranslated strings, translates with LLMs, and previews locally — all from your terminal.
The key difference: Crowdin is a platform you upload files to; Polyglot is a tool that works inside your codebase.
| Feature | Polyglot | Crowdin |
|---|---|---|
| String detection (AST-based) | ✓Yes | ✕No |
| AI/LLM translation | Built-in | ✓Yes (add-on) |
| Local preview | ✓Yes (polyglot preview) | ✕No |
| CI/CD integration | ✓Yes (GitHub Action) | ✓Yes |
| CLI support | Primary interface | Available |
| IDE integration | ✓Yes (VS Code extension) | ✕No |
| Web dashboard | Review workbench (optional) | Full-featured |
| Free tier | Unlimited scanning, 500 free strings | 1 private project |
| Starting price | $0 (free scanner) | $0 (limited) |
| Translation memory | ✓Yes | ✓Yes |
| Glossary support | ✓Yes | ✓Yes |
| Vendor management | ✕No | ✓Yes |
| Over-the-air delivery | ✕No | ✓Yes |
Crowdin is the industry standard for a reason. If you need any of the following, Crowdin is likely the better choice:
Crowdin has a mature marketplace of translation agencies, reviewer roles, and approval workflows. If you work with external translators, Crowdin handles this natively.
Crowdin can push translation updates to mobile apps without an app store release. Polyglot requires a redeploy.
Crowdin integrates with 700+ tools and has SDKs for nearly every platform. It has been around since 2009 and the ecosystem reflects that.
Crowdin's GitHub integration syncs translation files through service branches and can send finished translations back as pull requests.
Polyglot uses tree-sitter to parse your source code at the AST level and find untranslated strings across seven frameworks — Next.js, Astro, SvelteKit, React Native, Vue, Angular, and Flutter. Of the strings Polyglot flags, roughly 98% are genuine (a measured precision rate across real open-source codebases), so you spend your time translating, not triaging false positives. Crowdin works with strings you have already extracted into translation files. If you haven't extracted them yet, Crowdin can't help you find them.
Polyglot runs in your terminal, reads your code directly, and fits into the workflow you already have. A VS Code extension flags untranslated strings inline as you type and an open GitHub Action calls out new untranslated strings right on the PR — so detection lives where you already work, not in a separate dashboard. On Team and Scale plans, Polyglot Automation (early access) opens the translation PR itself.
Polyglot's fine-tuned LLMs score 4.96/5 for translation quality across 49 languages on a reproducible benchmark — dataset, judge prompts, and re-judge script are public, so you can verify it yourself rather than take the number on faith.
polyglot preview launches a local server showing your app with translations applied, before you deploy. Crowdin's in-context editor requires setup and works differently across frameworks.
| Polyglot Free | Polyglot Pro | Crowdin Free | Crowdin Pro | |
|---|---|---|---|---|
| Price | $0 | $49/mo ($39 annual) | $0 | $59/mo |
| String detection | Unlimited | Unlimited | N/A | N/A |
| Translation | 500 free | 10,000 strings | Included | Included |
| Languages | 2 | 5 | Unlimited | Unlimited |
| Projects | 1 (unlimited scanning) | 3 | 1 private | Unlimited |
Crowdin's free tier limits you to a single private project. If you have two projects — say, your main app and your marketing site — you are already on a paid plan. Crowdin's Pro plan starts at $59/month, and pricing scales with hosted word count and projects.
Polyglot's free tier lets you scan unlimited projects and translate 500 strings free (50 to try with no account) — enough for most side projects and early-stage startups.
Crowdin is the right choice if
Polyglot is the right choice if
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