StackOne provides an AI-first integration platform that combines a proprietary AI agent and real-time engine to connect complex enterprise APIs with speed, scale, and improved accuracy. Its agent automates building use-cases on top of messy APIs, enabling integrations in days rather than weeks and freeing product teams to focus on roadmaps. The platform offers 3,000+ actions across 200+ connectors and supports bi-directional, real-time integrations with built-in security and privacy controls. StackOne reports having surpassed 1 billion API calls and counts customers including Drata, Attensi, and Localyze. The company is investing in a developer community, open-source contributions, and AI Demo Days to support adoption and ecosystem growth. Planned use of new funding includes advancing its tool-calling LLM, deepening integrations and actions, and continuing R&D to scale enterprise AI agents worldwide. StackOne provides an embedded IPaaS that gives SaaS vendors a single, pre-mapped unified API to enable enterprise-grade B2B integrations across an entire industry. Its solution offers real-time interfaces to connect with established HRIS tools while protecting sensitive data. The platform is positioned to simplify and scale integrations for modern SaaS companies by delivering customizable, real-time workflows. StackOne plans to use its new funding to invest in AI to expand and improve its unified API offering. It also intends to grow its presence in the US, EU and Australian markets. The company is led by CEO Romain Sestier and CTO Guillaume Lebedel and recently closed a seed round to support these plans.

Total raised

$24M

Funding rounds

2

Latest round

Series A

Latest activity

May 2025