Letter AI Raises $40 Million Series B to Scale AI-Driven Deal Enablement Platform

New updates have been reported about Letter AI.

Letter AI has secured a $40 million Series B round led by Battery Ventures just four months after its prior raise, underscoring accelerating enterprise demand for AI-native revenue enablement. The Chicago-based company plans to deploy the capital to deepen product development, expand headcount globally, and accelerate go-to-market, targeting enterprises replacing fragmented, low-adoption sales enablement stacks with unified, AI-first platforms.

Positioning itself as a deal enablement system rather than a static training tool, Letter AI integrates content, learning, coaching, and buyer engagement into a single platform that adapts in real time to each seller and opportunity. Customers such as Lenovo report that the software delivers live, deal-specific guidance that shortens sales cycles and helps teams respond faster to evolving offerings, addressing a market where sellers currently spend less than 30% of their time with customers.

Alongside the funding, Letter AI launched Letter Compass, a product designed to sit directly in the sales execution workflow by combining enablement content and training with live CRM data and customer interactions. This capability aims to deliver highly contextual, in-the-moment recommendations during active deals, moving sales methodology from static playbooks into a continuously updated intelligence layer that influences call preparation, live conversations, and next-step planning.

Co-founder and CEO Ali Akhtar said revenue enablement is well suited for an AI-native approach because it sits at the intersection of content, people, and real-time decision-making, while co-founder and CTO Armen Forget emphasized that enterprises now require holistic, system-level intelligence rather than isolated AI features. Battery Ventures’ Brandon Gleklen, who has joined Letter AI’s board, cited strong customer adoption and the growing need for system-level AI platforms in revenue operations as drivers for the investment, arguing that Letter AI’s ground-up AI design differentiates it from legacy tools and point solutions.

The company, which serves global enterprises including Lenovo, Adobe, Novo Nordisk, Plaid, Zip, RingCentral, Kong, and SolarWinds across more than 30 countries, is positioning this funding round as a catalyst to capture share in a market undergoing a reset toward outcome-focused, AI-native go-to-market infrastructure. Recent recognition from G2 as a highest-momentum leader in sales enablement, along with multiple category badges, provides third-party validation of Letter AI’s customer traction and growth trajectory, reinforcing its bid to become a core platform in enterprise revenue stacks.