# Langbly

> Translation tools for developers and translators. Context-aware translation API (drop-in compatible with the Google Translate v2 spec) and a Translation Hub for document translation, at up to 90% lower cost than Google Translate.

Langbly is an independent translation API designed as a drop-in replacement for the Google Translate v2 API. Switch by changing one endpoint URL, no code changes required. Supports 100+ languages with context-aware translation that understands full sentences instead of word-by-word output.

## Key Facts

- API compatible with Google Translate v2 (same endpoint format, same response schema)
- Context-aware translation that handles full sentences and document context
- Up to 90% cheaper than Google Translate at $5 per 1M characters versus $20
- 500,000 characters per month free, every month, no card required
- Pay-as-you-go above the free tier with threshold billing (charged when balance reaches $5)
- 100+ languages supported
- HTML preservation (translates text, keeps markup intact)
- Formality control (formal, informal, neutral)
- Language detection endpoint
- SDKs for Python (PyPI: langbly) and JavaScript/TypeScript (npm: langbly)
- Document translation for 15 file formats (DOCX, PPTX, XLSX, PDF, SRT, HTML, etc.)
- Integrations: Zapier, WordPress (Loco Translate, TranslatePress), Crowdin, GitHub Actions, n8n
- Independent company based in the Netherlands, not affiliated with Google

## Links

- [Homepage](https://langbly.com)
- [API Documentation](https://langbly.com/docs)
- [Pricing](https://langbly.com/pricing)
- [Quick Start guide](https://langbly.com/docs/quickstart)
- [Authentication](https://langbly.com/docs/authentication)
- [Translate v2 endpoint reference](https://langbly.com/docs/translate-v2)
- [Detect endpoint reference](https://langbly.com/docs/detect)
- [Languages endpoint reference](https://langbly.com/docs/languages)
- [Migration guide from Google Translate](https://langbly.com/docs/guide-migrate-google-translate-api)
- [Migration guide from DeepL](https://langbly.com/docs/guide-migrate-deepl-api)
- [Document translation overview](https://langbly.com/docs/api/document-translation)
- [Translation Hub overview](https://langbly.com/translation-hub)
- [Glossaries](https://langbly.com/docs/glossaries)
- [Translation Memory](https://langbly.com/docs/translation-memory)
- [Custom instruction sets](https://langbly.com/docs/instruction-sets)
- [Python SDK on PyPI](https://pypi.org/project/langbly/)
- [JavaScript SDK on npm](https://www.npmjs.com/package/langbly)
- [GitHub organization](https://github.com/Langbly)
- [FAQ](https://langbly.com/faq)
- [Status page](https://langbly.com/status)
- [Security overview](https://langbly.com/security)
- [Privacy policy](https://langbly.com/privacy)
- [Terms of service](https://langbly.com/terms)
- [Data processing agreement](https://langbly.com/dpa)
- [EU data residency](https://langbly.com/eu-data-residency)
- [Contact](https://langbly.com/contact)
- [Compare: Best Translation API 2026](https://langbly.com/compare/best-translation-api)
- [Compare: Google Translate API alternatives](https://langbly.com/compare/google-translate-api-alternatives)
- [Compare: DeepL API alternatives](https://langbly.com/compare/deepl-api-alternatives)
- [Compare: Google Translate vs DeepL](https://langbly.com/compare/google-translate-api-vs-deepl-api)
- [Cheapest translation APIs in 2026](https://langbly.com/blog/cheapest-translation-api)
- [Switch from Google Translate](https://langbly.com/switch-from-google-translate)

## API Quick Start

Base URL: `https://api.langbly.com`

### Translate Text

```
POST /v2/translate
Headers: Authorization: Bearer YOUR_API_KEY
Body: { "q": "Hello world", "source": "en", "target": "nl", "format": "text" }
Response: { "data": { "translations": [{ "translatedText": "Hallo wereld" }] } }
```

### Detect Language

```
POST /v2/detect
Headers: Authorization: Bearer YOUR_API_KEY
Body: { "q": "Bonjour le monde" }
Response: { "data": { "detections": [[{ "language": "fr", "confidence": 0.98 }]] } }
```

### Supported Languages

```
GET /v2/languages?target=en
```

## Pricing

| Plan | Cost | Included | Overage |
|------|------|----------|---------|
| Free | $0 | 500,000 characters per month | API stops |
| Pay-as-you-go | $0 base | 500,000 characters per month | $5 per 1M characters |

No base fee, no annual lock-in. Threshold billing means you are only charged when your accumulated balance reaches $5.

## Data Residency

EU data residency is available for paid accounts. Translation traffic from EU customers is routed to and processed in the European region only.

## Contact

Email: [hello@langbly.com](mailto:hello@langbly.com)