Tools· Content & Editorial

    DeepL

    Translation service for text, documents, and speech, with glossaries, tone control, and an API for embedding it into your own applications.

    writingexecutableFreemium

    Description

    Strengths

    Specialized language model
    An in-house LLM, according to the provider trained on proprietary data with the help of language experts, powers translation, writing assistance, and voice translation alike.
    Format-faithful document translation
    Files can be submitted by drag and drop and translated into more than 100 languages, with the original formatting preserved in formats such as PDF, Word, PowerPoint, and HTML.
    Glossaries and tone control
    Custom glossaries keep terminology consistent, and the tone of a translation can also be adjusted between formal and informal.
    Four products on one platform
    Translator, the writing assistant DeepL Write, real-time voice translation via DeepL Voice, and a shared API are all part of the same language AI platform.
    Enterprise certifications
    ISO 27001, SOC 2 Type II, HIPAA, and GDPR certifications, along with BYOK encryption and audit logs, are aimed at regulated enterprise environments.

    Assessment

    AI features

    • In-house language model instead of a generic LLM DeepL relies on a model trained specifically for language, rather than a general-purpose language model, for translation, writing, and voice.
    • Automatic tone and style adaptation DeepL Write Pro suggests phrasing in real time and adapts drafts of emails, reports, or presentations to the audience and context.
    • Real-time voice translation DeepL Voice translates spoken language live in meetings and in-person conversations.
    • Customization Hub as a control layer Organizations can centrally set terminology, style, and tone so that automated translations stay on-brand.

    Suitable for

    • Teams and individuals who want to transfer text, documents, or images into another language quickly and with the formatting preserved
    • Organizations that want to embed translation into their own websites, products, or localization processes through the API or CAT tool integration
    • International teams that want to bridge language barriers in meetings or customer conversations with real-time voice translation
    • Less suitable for Less suitable for users looking for a solution with no volume limits at all on documents and glossaries, since those features only become fully available with the paid Pro plan

    Limitations and notes

    • Free tier is limited Without a Pro plan, document volume and the number of custom glossaries remain limited; unlimited text translation, CAT tool integration, and team administration with SSO are Pro-only features.
    • Data training is tied to the plan DeepL explicitly guarantees only for Pro customers that their data will not be used to train its own models.
    • Certifications named in the context of the API The compliance certifications listed on the provider's site, such as ISO 27001, SOC 2 Type II, HIPAA, and GDPR, relate to the DeepL API; the exact availability per plan should be checked against current documentation before use in regulated environments.
    • Language coverage varies by feature Text translation is advertised for more than 30 languages, document translation for more than 100 languages; which languages DeepL Voice specifically covers is not individually listed on the provider's site.

    Quick start

    1. On deepl.com, choose the desired product: Translator, Write, Voice, or API.
    2. For text translation, set the source and target language and paste in text, or upload a file by drag and drop.
    3. If needed, create a custom glossary and set the desired tone for the translation.
    4. To embed translation into your own applications, open the API documentation and use the client libraries available through the developer community.
    5. Try out first translations with a free trial before switching to a Pro plan.

    Tips

    • Set up a glossary early rather than correcting terminology afterward; this locks in recurring technical terms from the start.
    • Choose the tone deliberately and test it for different audiences, for example formal for customer communication and casual for internal messages.
    • Use the "show changes" feature in DeepL Write to review text corrections before accepting them.
    • For API integration, use the developer community on Discord and the API documentation rather than testing every detail yourself.

    Access

    Last reviewed: · Pricing, plans and features are a snapshot in time. Check the provider's own page before deciding.

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