Thayer Investment Partners is pleased to announce its participation in Slang AI's $36 million Series B financing, led by US Venture Partners (USVP). The round — $28 million in equity and $8 million in debt — brings Slang AI's total funding to $68 million and includes participation from former Stripe COO Claire Hughes Johnson, alongside existing investors Homebrew, Stage 2 Capital, Active Capital, Wing VC, Collide Capital, and Underscore VC.

Founded in 2019 by Alex Sambvani and Gabe Duncan, Slang AI is the agentic voice platform purpose-built for hospitality. It answers every inbound guest call with precision, warmth, and professionalism — automating reservations, private dining, catering requests, and general inquiries while integrating directly with OpenTable, SevenRooms, Tripleseat, and Yelp. The platform now serves more than 2,000 restaurant locations including Texas de Brazil, Carmines, Riot Hospitality Group, and Dineamic Hospitality.

“Slang AI has built a powerful competitive advantage with a dataset of more than 25 million customer calls from 10 million unique guests. That depth of real-world hospitality interaction is what makes the platform feel like a true superhost — and it's why we doubled down in this round.”

— Thayer Investment Partners

Slang AI will use the new capital to deepen its AI capabilities, build multi-modal experiences that extend beyond voice, and expand into new parts of the guest journey — from personalized recommendations to post-visit follow-up and reviews — that drive measurable revenue and engagement for hospitality operators.

The phone is still the single highest-intent channel for restaurants and hotels, and yet it has been one of the last surfaces to receive a modern AI treatment. Slang AI is changing that, and at scale. With 95%+ guest satisfaction and a clear path from restaurants into hotels and broader venues, the company sits squarely at the intersection of two trends Thayer has invested behind for more than a decade: vertical AI built for hospitality, and software that converts missed operational moments into recovered revenue.

We are proud to continue supporting Alex, Gabe, and the Slang AI team as they scale guest communications across every restaurant — and beyond.