London-based StackOne has successfully raised $20 million in a Series A funding round led by GV, formerly known as Google Ventures, with participation from Workday Ventures and other notable investors.

This latest investment brings StackOne's total capital raised to £18 million, underscoring strong investor confidence in its innovative integration solutions.

Founded in 2023 by former Google employees Romain Sestier and Guillaume Lebedel, StackOne aims to tackle the integration challenges faced by SaaS platforms.

With 83% of B2B buyers prioritizing integrations, StackOne addresses significant market inefficiencies where 71% of SaaS companies take over three weeks to establish a single connection.

To improve integration efficiency, StackOne has developed a proprietary AI agent and a real-time engine, enabling faster and more secure connections between SaaS products and enterprise systems.

The platform allows for rapid integration of complex enterprise APIs in days, significantly reducing the typical time required for SaaS firms.

Barbry McGann from Workday Ventures praised StackOne for its rapid integration capabilities and its focus on agent-to-agent interoperability, which unlocks powerful customer use cases.

Having surpassed 1 billion API calls, StackOne demonstrates its effectiveness and rapid adoption, with clients including Drata, Attensi, and Localyze across three continents.

Market analysts predict that the enterprise application integration market will grow to $17.5 billion by 2033, driven by the increasing use of SaaS tools.

StackOne's platform focuses on depth, accuracy, and security, positioning AI agents as essential for achieving enterprise-grade integrations at scale.

The platform provides SaaS vendors and AI agent developers with a universal interface, enabling powerful bi-directional integrations while safeguarding sensitive data.

Executives from GV and Workday Ventures have highlighted StackOne's ambition and innovative infrastructure, emphasizing its potential to redefine the integration platform category.