Doubling down on active intelligence: Why we invested in Letter AI’s $40M Series B

Letter AI went from Series A to a $40M Series B in just 120 days, expanding its customer base 15x to serve revenue teams across 30+ countries at enterprises like Lenovo, Adobe, and Plaid. TechNexus is doubling down alongside Battery Ventures and Y Combinator as the company launches Letter Compass, a real-time deal intelligence layer.

We are thrilled to announce that TechNexus Venture Collaborative is participating in Letter AI ’s $40M Series B , led by Battery Ventures. We are proud to continue backing co-founders Ali Akhtar and Armen Forget alongside Y Combinator, Lightbank, Stage 2 Capital, Northwestern Mutual Future Ventures and others as Letter AI redefines AI-native revenue enablement for the enterprise. Our Initial Belief: The Broken Enablement Paradigm When we first invested in Letter AI’s seed round alongside our corporate partner THOR Industries, the problem they were tackling was as massive as it was frustrating. Enterprise sales teams were drowning in fragmented tools, static playbooks, and outdated collateral. Reps were spending up to 20% of their week just searching for the right materials, and corporate enablement was largely a passive, disconnected exercise. We believed that generative AI was the key to moving revenue enablement from a passive library to an active, real-time advantage. Ali and Armen, with their deep experience building enterprise AI SaaS, had the exact right vision: a unified, AI-native platform that integrates training, coaching, and content management into one seamless workflow. The Validation: A Breakneck Pace of Execution In the venture world, you rarely see a company move from a Series A to a Series B in just 120 days. But that is exactly what Letter AI has done. Since the company’s $10.6M Series A just four months ago in October 2025, the team has executed with relentless speed. In the last year, Letter AI has expanded their customer base by 15x. Today, their platform is mission-critical for revenue teams across more than 30 countries at global enterprises like Lenovo, Adobe, Novo Nordisk, and Plaid. But what truly validates this investment isn't just the logo velocity—it's the depth of customer love. Letter AI recently earned 21 badges in the G2 Winter 2026 reports, including Highest Momentum Leader in Sales Enablement, along with top marks for 'Users Most

By Joe Fontana at TechNexus Venture Collaborative