StackOne review

StackOne describes itself as an AI agent integration platform, and it puts governance at the center. One connection gives an agent access to 44,000+ actions across 640+ enterprise apps, and every connector is included on every plan. StackOne handles OAuth, SAML and API key auth, forwards provider webhooks to trigger agent workflows, and connects through MCP, A2A or its API, so it works with Claude, Copilot Studio, Gemini, Glean, Cursor and n8n. Defender Core, its open source prompt-injection defense, scans tool responses before they reach the model on all plans, and Tool Policies set permissions down to the field. The Gateway offer is for your own employees and internal agents, with a free Starter plan of 1,000 credits per seat a month, while an OEM offer covers embedding in your product. Team pricing is seat-based and the figure on the page changes with seat count, so we left the starting price pending. Custom connectors need a paid plan.

Who it is for

Companies deploying internal agents across HR, sales and IT tools, or embedding governed integrations in their own product.

Price

See vendor pricing (USD check pending).

US price check pending. See the vendor pricing page.

Key features

• 640+ pre-built connectors and 44,000+ actions on every plan
• Managed auth for OAuth, SAML and API keys
• Defender Core prompt-injection scanning on every tool response
• Tool Policies that control permissions per action, field and user
• AI Connector Builder for custom connectors on paid plans

Strengths and weaknesses

• Strength: Free Starter plan with 1,000 credits per seat a month
• Strength: Connects via MCP, A2A or API to 60+ AI clients and frameworks
• Strength: Separate Gateway and OEM offers for internal and product use
• Weakness: Seat-based pricing makes cost harder to compare
• Weakness: AI Connector Builder needs a paid plan
• Weakness: Advanced capabilities such as browser use cost extra credits

Key facts

• Starter: Free, 1,000 credits per seat a month
• Team: 5,000 credits per seat a month, 3 custom connector slots
• Credit use: One tool or API call costs 1 credit
• Clients: Claude, Gemini, Glean, Cursor, n8n, Copilot Studio and more

Where it ranks

StackOne is No. 8 in our Best AI Agent Tool Integration Platforms verdict.