Supertext API

Quality translation in any system with the Supertext API

Add secure AI translation in 28 languages to your workflows, efficiently and at scale.

Trusted by 1,500+ companies every day

Streamline localisation: fully automatic or reviewed by human experts

Supertext’s translation API helps you reach global audiences faster – while always staying on-brand.

Supertext is powered by advanced LLMs that measurably outperform DeepL. For tailored results in 28 languages and any workflow.

Translate tagged text or entire documents while retaining the formatting:

  • HTML, XML
  • Office documents (.docx, .xls, .pptx)
  • PDFs
  • Subtitles (.srt)
  • Plain text (.txt)

Important translations checked by experienced linguists – in minutes rather than hours. For uncompromising accuracy when it really matters.

Fixed terminology and your preferred formality level integrated into every project. Customisable on the fly with each API request.

Detect the language of any input with high accuracy. Works across all supported languages and file types. Ideal for fully automated workflows.

Supertext is hosted exclusively on Swiss servers or on-premise. It’s ISO-certified and 100% compliant with GDPR (EU) and FADP (CH).

From startups to enterprises: why teams choose the Supertext API

3 out of 4

languages rated better than DeepL

Read research paper

500+

custom language models deployed for even greater accuracy

3,000+

language experts available for Verification within minutes

One translation API, a world of use cases

Reduce time-to-market in e-commerce

Translate entire websites and shops automatically – and bring in human experts to review flagship content at the press of a button. All via a single API.

Streamline processes through automation

Empower everyone on your team to speak your customers’ languages. Instantly, consistently and securely.

Win more software customers with translation as a feature

From video captions to multilingual editorial systems, AI translation integrated into your software is a key differentiator for users.

Take your website and apps multilingual in no time

Seamless, on-brand translation with the Supertext API and fixed terminology for consistent, ready-to-deploy content.

Make data security standard across the board

Reduce risk and keep confidential content under control with the Supertext API, a single trusted translation solution for your whole team.

Break language barriers in customer support

Increase client satisfaction for the long term with automatic multilingual support channels that follow your terminology and brand voice.

Maximum security by design

Built for developers, growth teams and localisation specialists.

  • Simple authentication via API key
  • Add glossaries as needed to any request
  • Fast, asynchronous responses
  • Ongoing cost overview and usage monitoring
  • Fully transparent pricing
  • Code samples and documentation
Maximum security by design

Here’s why we’re trusted by legal, financial and public-sector clients across Europe:

  • Swiss or on-premise hosting
  • Completely GDPR- & FADP-compliant
  • ISO 27001-, 9001-, 17100- and 18587-certified
  • SSO integration and access controls for team management
  • Encrypted data transmission and no storage of translations
  • Custom TLS/SSL certificates
Maximum security by design

CLIENT CASE STUDIES

From multinationals to e-commerce giants: you’re in good company.

FAQ

Ready to elevate language quality in every interface?