SBB
Confidently transporting words from A to B. SBB keeps its communications on track with customised AI translation from Supertext.
Trusted by 1,500+ leading brands across Europe. Explore case studies.
AI translator comparison (as of Nov 2025)
Supertext vs DeepL: how do they compare?
Supertext
DeepL
Premium translation quality by default
Supertext translates better than DeepL in 3 out of 4 languages.
AI customisation with your translation data
Custom LLM refined with your translations for even better results.
Extended context for maximum consistency
Keep terminology in line and reduce errors across long-form text.
Human language experts on demand
Get important translations verified in minutes with just a click.
Niche language and variant support
E.g. Swiss German, Romansh, German (DE, AT, CH), French (FR, CH)
Enterprise-grade data security control
Choose between SaaS, private cloud or on-premises hosting.
Better by default. Perfect when customised.
Even in its default version, Supertext measurably outperforms DeepL for translation quality in 3 out of 4 languages.
And it can reach even greater levels of translation accuracy when customised with your own translation data. This isn't just a finishing touch; it's a complete new ball game.
DeepL
Supertext
Default model
Supertext
Customised model
Why 1,500+ brands choose Supertext over DeepL
90%
increase in error-free output with custom AI models
500+
custom AI models implemented at enterprise scale
3,000+
pro linguists ready to help you go beyond AI output
CLIENT CASES
