We fuel innovation by connecting AI agents to software.

StackOne provides real-time integration infrastructure purpose-built for AI agents acting across business SaaS applications. The platform optimizes execution by reducing context bloat and token spend, and protects agent actions with open-source prompt injection detection and guardrails. Unlike retrofitted iPaaS tools, StackOne was designed from day one for agent-to-application connectivity.

Two groups: teams building AI agents into their products who need to connect them to customers' enterprise stacks — HRIS, ATS, CRM, LMS — at scale, and teams using off-the-shelf agents like Claude Code or ChatGPT who need those agents to act across their own business applications. If your agents only need a handful of read-only connectors with simple requirements, you can use brand MCPs. Once write operations, custom integrations and actions, customer counts, and tenants grow, managed infrastructure pays off.

StackOne is SOC2 Type II, HIPAA, and GDPR certified with managed permissions that limit each agent's scope. Agent-consumed data is scanned by Defender, an open-source prompt injection library that detects threats in under 4ms with 88.7% accuracy — higher than models 81x its size like DistilBERT. Authentication, credential storage, and access control are managed by the platform.

StackOne is free to start: the Gateway Starter plan includes 1,000 credits per seat each month and all 450+ pre-built connectors. Team adds the AI Connector Builder, StackOne Agents (A2A), Defender Premium, and SAML SSO; Enterprise adds custom credit volume, audit logs with SIEM export, and on-premise options. OEM Core is free for embedding StackOne in your own product. Full breakdown on the pricing page.

StackOne Technologies Limited is incorporated in England and Wales (company 14684360) with registered offices at 2 Communications Road, Newbury, Berkshire, RG19 6AB. The team operates globally across Europe and the United States.

Yes. The team is distributed across Europe and the United States and hires across engineering, product, and go-to-market. Open roles are listed on the careers page.