Overview
StackOne provides a tool gateway that sits between AI agents and business applications, letting assistants access HR, finance, IT, and CRM systems with per-user permissions. It offers an MCP gateway plus 580+ managed connectors and 36,000+ pre-built actions across MCP, A2A, SDKs, and APIs, plus an AI connector builder for custom or legacy systems. It loads only the tools needed for a task and enforces security with tool policies, PII redaction, prompt-injection defense, and audit logs. The platform targets mid-market and enterprise customers and software vendors, with flexible pricing from a free Starter tier to Team and Enterprise, plus a free OEM option for embedding.
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Simplify's take
What believers are saying
- GV led StackOne's $20 million Series A on May 6, 2025, funding expansion.
- StackOne claims 100k+ evals and 78% average tokens saved on its September 2026 site.
- Continuous connector shipping and MCP/A2A support widen adoption among AI-agent builders.
What critics are saying
- Merge, Workato, and MuleSoft compress pricing as connector commoditization accelerates by 2027.
- Prompt-injection or token-lifecycle failures on StackOne Hub trigger enterprise security reviews immediately.
- A major platform outage sends AI-agent builders back to direct API integrations.
What makes StackOne unique
- StackOne spans 510+ connectors and 31,000+ actions across AI clients.
- Its Documents API unifies Notion, Confluence, Google Drive, SharePoint, and OneDrive access.
- Built-in prompt-injection defense and StackOne Hub simplify secure, real-time agent connections.
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