Stackone raises 17.7 million euros to exceed Zapier and reinvent the SaaS integrations in the AI ​​era

The quality and reliability of integrations between software and autonomous agent, is a strategic issue. It is on this structural flaw that put Stackyoung Londonian shoot, who has just finalized a lifting of 17.7 million euros ($ 20 million) in Series A To redefine the way B2B software connects, interact and evolve in an environment controlled by artificial intelligence.

The startup, founded by Roman Sestier And Guillaume Lebedeloffers a IA oriented integration platformcapable of connecting hundreds of SaaS applications with autonomous agents, while respecting the safety, scalability and performance requirements of large companies.

Integrate, or drop out

Recruitment, finance, customer support, security: all critical functions today depend on fluid connections between applications. However, according to data communicated by Stackone, 71 % of companies take more than three weeks to produce a simple integration.

The challenge is amplified by the development of IA agentswhich must interact with complex business systems to perform their tasks. If current standards like MCP (Model Context Protocol) Or Openfunction offer a start of response, they do not respond to business requirements in businessespecially in terms of security, compatibility, or functional depth.

Stacks intends to position itself as The universal integration overlaycapable of connecting agents to more than 200 SaaS systems via a real -time engine and a owner agent. Its platform already allows more than 3,000 predefined sharescovering tools like Workday, Okta, Salesforce, Greenhouse or ServiceNow.

Faced with Zapier, Paragon, Merge.dev … and their limits

The integration platform market is not new. In the United States, Zapier (oriented SMEs), Paragon (SaaS developers oriented) or Merge.dev have built powerful architectures to automate synchronization between tools. In Europe, Cyclr (United Kingdom), n8n (Germany) or Tray.io (UK/US) occupy the technical terrain with API-STIF approaches.

In France, actors like Mindee (Document processing api), or Koyeb (Cloud data orchestration), are also positioned on automation segments.

But Few of these platforms are thought from the start for IA agentsnor adapted to the regulatory, technical and safe complexity of large accounts. Stackone wants to make this constraint a technological opportunity.

A lifting led by GV and the sponsors of the AI

The round of table is led by GV (Google Ventures)and joined by Workday Ventures,, XTX Ventures,, Episode 1,, Playfairas well as Investors from Openai, Deepmind, Microsoft and Mulesoft.

For Luna SchmidParty in GV, what distinguishes Stackone is “its ambition and its clarity. Romain and Guillaume do not build yet another SaaS integration platform. They create an infrastructure on which the ECOSSYSTEM of IA agents will be able to rely. ”

The objective of this lifting is triple, accelerate the development of the homemade language modelincrease the number of integrations available, and structure a IA-Native developer communitythrough open source initiatives and Ai Demo Days launched by the team.