Today, Guillaume and I are thrilled to share that StackOne has closed a $20 million Series A round led by GV (Google Ventures), with participation from Workday Ventures and XTX Ventures and support from angels at OpenAI, Deepmind, Microsoft, Mulesoft and more.

This milestone validates our vision for the future of software and propels us into the next era of B2B SaaS - one defined by autonomous AI agents, real-time connectivity, and enterprise-grade security.

A new phase for B2B SaaS

For over a decade, we’ve witnessed B2B SaaS evolve: from monolithic on-premise suites, to cloud applications and now into the realm of AI-powered agents that autonomously execute complex workflows. Native integrations have become table-stakes for most enterprise buyers, yet 71% of SaaS vendors still require three+ weeks or more to launch a single connector. And the gap between buyer expectations and engineering realities is widening as AI agents demand real-time, deeply accurate integrations.

We’re building the integration infrastructure for AI Agents

At StackOne, we believe the future of SaaS hinges on a Universal Integration Layer - a foundational fabric that unifies every API, protocol and AI agent into one seamless integration platform. Our proprietary AI integration agent and breakthrough real-time engine empower teams to spin up secure, bi-directional connections in days instead of weeks. With instant access to over 3,000 actions across 200+ connectors, from HR tools and CRM to IAM, file storage and ticketing, product teams are finally free to focus on innovating core features, not maintaining brittle glue code.

What’s Next?

We’ve only just begun.

Join us on May 15th at 3:30 PM BST for a live webinar on “What is a Universal Integration Layer?” - where Guillaume and I will dive into how this new infrastructure works and why it matters for all B2B SaaS and AI Agent builders 👉 https://lu.ma/ehids7kw

If you’d like a personalized walkthrough, book a demo today and see StackOne in action: Book a demo.

Read more about our fundraise in our press release.

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Finally, huge thanks to our incredible team, our investors and our customers for believing in this vision. The best is yet to come! 🚀