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Sales startup Letter AI raises $40 million in Series B funding led by Battery Ventures to enhance its AI-powered sales tools.

PRIVATEFeb 24, 2026

Amount Raised

$40 Million

Round Type

Series B

ChicagoSoftwareArtificial IntelligenceEnterprise SoftwareMachine LearningSaaS

Investors

Y CombinatorLightbankNorthwestern Mutual Future VenturesStage 2 CapitalBattery Ventures

Description

Letter AI has secured $40 million in Series B funding just four months after its previous $10.6 million Series A round. The funding, led by Battery Ventures, will support product development and global team expansion. Letter AI aims to unify sales tools into a single platform, enhancing customer engagement. The company serves customers in 30 countries, including Lenovo and Adobe.

Who to call at Letter AI, and when

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Company Information

Company

Letter AI

Location

Chicago, Illinois, United States

About

Letter AI is a Chicago-based sales startup that provides AI tools to streamline sales processes. Its software unites disparate tools into a single 'command center,' helping sellers to engage more effectively with customers. The company has recently launched a new product, Letter Compass, which offers personalized sales guidance. It aims to reshape the sales landscape by improving training, content management, and buyer engagement.

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Related People

2 contacts
Verified contactsArmen, Co-Founder & CTO hidden hiddenSee plans and pricing
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Funding Insights

What this usually means
Timeline to next round
Series B companies typically work for 15-20 months before raising new capital
Growth expectations
Series B companies are expected to scale rapidly and expand market reach

Letter AI raised. Fundz records a round at a median of 3.6 minutes from the SEC filing, with the decision-maker attached.

145 of these a day, filtered to the companies you pick, with the decision-maker attached.

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