Letter AI raises $40 million

Revenue enablement platform Letter AI has raised a $40 million Series B funding round led by Battery Ventures, with participation from Y Combinator, Lightbank, Northwestern Mutual Future Ventures, Stage 2 Capital, and existing investors.

Letter AI offers a unified platform that brings content, learning, coaching, and buyer engagement into a single system that “adapts in real time to each seller and each deal.”

Alongside the funding, Letter AI is launching Letter Compass, a new product that delivers real-time, deal-specific guidance for active opportunities. By combining enablement content and learning with live CRM data and customer interactions, Letter Compass offers “highly contextual intelligence” directly into the flow of sales execution.

“Revenue enablement is a perfect problem for an AI-native platform because it sits at the intersection of content, people, and live decision-making. Legacy tools were built for static libraries and periodic training. We built Letter AI for modern sales teams who need guidance that is personalized, contextual, and available in the moment a deal is happening.” – Ali Akhtar, co-founder and CEO of Letter AI.

“Sales methodology has historically lived in static playbooks that reps skim once and forget. Letter AI changes that – it’s a living intelligence layer that’s tuned to every call prep, embedded in every live interaction, and actively shaping next steps for each deal. What makes this truly transformative is the personalization – the guidance is customized to each buyer’s unique context, and the coaching adapts to where each seller is in their own development journey. Letter AI meets sellers where they are – always on, always relevant, and always adapting to the changing buyer landscape.” – Mark Roberge, co-founder at Stage 2 Capital and founding CRO of HubSpot.