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DeepL API

Model API

by DeepL

Hosted translation API billed by the character.

Find alternatives to DeepL API

What it does

• Translation

How it compares

• Azure Translator in Foundry Tools

  In March 2026 blind tests, DeepL won 94% of head-to-head matchups against GPT-5.2, Gemini 3.1 Pro, Claude Opus 4.6, Google Translate and Microsoft Translator.

  Official documentation · 19 Sep 2026

Sources

Pricing

Pricing page · 21 Aug 2026

Constraints

Official documentation · 29 Sep 2026

Derived from this product's security block by scripts/fixes/derive-constraints-met.py; see provenance.security.

Security

Official documentation · 29 Sep 2026

Regional endpoints (EU default, US, Japan) need a signed regional deployment addendum. Certifications and RBAC from deepl.com/en/products/api; training is opt-out by the tier rule (API Free falls under the privacy policy's free section, API Pro never trains).

Sold within

Pricing page · 30 Sep 2026

Read in the in-app browser 2026-09-30 (API tab of deepl.com/en/pro; pagetext of the same URL returns only the Translator tab). Own API plan ladder, United States (USD) view: Developer "Test out the API for free" with "Sign up for free" ("One-time credit of 1 million characters"); Growth "$26.00 per month, billed annually" "+ usage-based price" with "Buy now"; "Enterprise API" via Contact Sales. "Growth does not include access to the web translator." The API is sold on its own plans, separate from Translator.

URL

Official documentation · 28 Sep 2026

Deployment

Self-reported · 8 Sep 2026

Inferred 2026-09-08, not read off a page: every already-decided product of type 'model-api' in this catalogue includes "saas" in its deployment list, zero exceptions, per item 198's measured cross-tab. May be incomplete if this product also offers a self-hosted or private-cloud option; not wrong either way.

Interfaces

Official documentation · 29 Sep 2026

Docs give the REST spec at developers.deepl.com/api-reference/openapi.yaml and state 'Our official client libraries wrap the API for Python, JavaScript, PHP, .NET, Java, and Ruby.'

Also from DeepL

• DeepL Translator Application

  Translates text and whole documents between its supported languages.

• DeepL Write Application

  Rewrites text for grammar, tone and phrasing in its supported languages.

• DeepL Customization Hub Application

  Control layer for on-brand AI translation: glossaries, style rules, translation memories and style profiles applied across DeepL's API and Translator products for B2B communication.

• DeepL Translation Flow Application

  End-to-end multilingual project-workflow management, integrating with DeepL's Translator/Write/API and third-party systems (Google Drive, SharePoint, Adobe Experience Manager, Contentful).

• DeepL Voice for Conversations Application

  Real-time speech translation for in-person, face-to-face conversation between multiple languages, with a comfortable dual-viewing mode; available on iOS, Android and web.

• DeepL Voice for Meetings Application

  Real-time voice-to-voice translation and multilingual subtitles for online meetings in Microsoft Teams, Zoom and Google Meet, in 30 spoken and 40+ caption languages.

Open DeepL in the directory

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