StackOne Attracts $20M Series A Backing to Enhance AI-Driven Connection Between SaaS Applications

By James Dargan · 10 May 2025 · 1 min read

StackOne, a platform focused on AI-powered SaaS and AI agent integrations, has raised $20 million in Series A funding led by GV (Google Ventures), with additional participation from Workday Ventures, XTX Ventures, Episode 1, Playfair, and prominent angels from OpenAI, DeepMind, Microsoft, and Mulesoft.

Founded by Romain Sestier and Guillaume Lebedel, StackOne enables enterprises to seamlessly connect AI agents to over 200 tools with more than 3,000 real-time actions. The platform supports building, testing, and monitoring integrations with enterprise-grade privacy and security. The new capital will fuel product development, enhance StackOne’s proprietary tool-calling LLM, and deepen platform capabilities to meet rising demand from customers like Drata, Attensi, and Localyze.

About the author

James Dargan

James Dargan is a writer and researcher at The AI Insider. His focus is on the AI startup ecosystem and he writes articles on the space that have a tone accessible to the average reader.

StackOne Attracts $20M Series A Backing to Enhance AI-Driven Connection Between SaaS Applications

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