Grammarly Growth Playbook

Non-native speakers struggled with English writing.

The 'Context-Aware' Multi-Platform Layer: Grammarly tacticaly won by living in the 'Gap' between applications. Their growth engine is the 'Universal Browser Extension'—a tool that monitors your writing across Gmail, Facebook, LinkedIn, and Slack. By being an invisible layer of 'Intelligence-as-a-Service', they achieved a level of user stickiness that single-platform tools (like Word's spellcheck) couldn't replicate. Their 'Weekly Writing Progress' emails further gamified the experience, making clear, correct writing a habitual part of the user's digital identity.