TL;DR: Grammarly’s acquisition of Superhuman marks its next move in a Commure-style roll-up of high-engagement, under-monetized productivity SaaS as it looks to build a full-stack AI suite across email, docs, and beyond. Sacra estimates that Grammarly hit $700M ARR in May 2025, up from $650M ARR at the end of 2024. For more, check out our full reports and datasets on Grammarly and Superhuman...