5M Words a Quarter: How Sinch Automates 65% of Translations
•6 min read
Managing localization for a multi-brand global company like Sinch, a customer communications infrastructure provider, comes with complex requirements. With distinct product lines like Sinch Mailjet and Sinch Mailgun operating under the same umbrella, traditional linear translation management systems quickly became a bottleneck. They forced every piece of content through the exact same rigid review process and made it almost impossible to customize AI workflows for different content types.
To fix this, Sinch teamed up with Undertow – who operates as Sinch's embedded fractional language team. Together, they moved to Crowdin Enterprise to build a modern, multi-brand localization setup – using AI not just for translation, but to manage and route workflows based on content type, while human experts focus on high-impact quality.
In Q1 2026 alone, Sinch processed roughly 5 million words – surpassing their entire 2025 volume (4 million words) in just three months.