StackOne
What is StackOne?
StackOne is an agent-to-app connectivity platform for product, platform, and AI infrastructure teams that routes agents through managed auth and secure execution. It combines Connect, Optimize, Secure, Connector Builder, MCP, Tool Discovery, and Defender to reach 270+ integrations and 18,000+ actions. Customers include Drata, Introist, Popp, GP, Flip, and Mindtools. Plans run Starter free, with Core and Enterprise custom pricing.
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At a glance
- StackOne is best for product and platform teams that need secure, scalable agent integrations across many business apps.
- Starter Free; Core Custom; Enterprise Custom
What does StackOne do?
StackOne handles agent-to-app connectivity by combining managed auth, MCP servers, and a connector builder with execution and discovery layers. Its platform routes agents through OAuth, token refresh, and credential storage, then lets them find and run the right action across 18,000+ pre-built actions and 278 connectors. The same infrastructure supports AI action SDKs, REST API access, and protocol-based access through MCP and A2A, so teams can wire agents into existing workflows without stitching together each integration manually. At scale, StackOne says it supports 270+ agent integrations and has processed 10+ million API calls. The platform is built for real-time, bidirectional use, with context optimization and secure execution designed to keep agents responsive as tool counts grow. Customers highlighted on the site include Drata, Introist, and Popp, and the company positions the system as agent-first rather than a lowest-common-denominator unified API.
Why use StackOne?
- It preserves provider-specific data models, so agents can work with real app concepts instead of a flattened abstraction.
- Managed auth, multi-tenancy, and scoped session tokens reduce the amount of credential plumbing teams maintain.
- Dynamic tool discovery and execution features help agents stay usable as connector counts and action counts grow.
- StackOne Defender adds prompt-injection protection at the integration layer, not as a separate afterthought.
- Deployment options include multi-region processing and on-premise deployment for stricter infrastructure requirements.
Who is StackOne for?
- Platform engineers who need to expose many SaaS actions to agents without building each OAuth flow manually.
- Product teams that want AI agents to operate across business systems with real-time execution and permissions control.
- AI infrastructure teams that need MCP, SDK, and API access for the same integration layer.
- Security-conscious builders who need prompt-injection defense and scoped access around agent tool use.
- Workflow automation teams that need reliable read/write integrations across HR, recruiting, CRM, and support tools.
What are StackOne's key features?
Connect
Connect 270+ AI agent integrations and 278 connectors, including Slack, Salesforce, and Workday, so agents can reach business systems without custom plumbing.
Optimize
Use 18,000+ actions and optimized execution to reduce token usage and speed tool calls, which matters when agents need to run many API steps.
Secure
Apply managed auth, multi-tenancy, and SOC2 Type II controls to keep credentials isolated and access governed across shared agent workflows.
Connector Builder
Build production-ready custom connectors and actions with the Connector Builder, then test them in the action playground before shipping to real APIs.
MCP
Expose tools through MCP, the AI action SDK, and API access, giving teams a standard way to plug StackOne into agent frameworks and code.
Tool Discovery
Search and select tools with dynamic tool discovery and semantic tool search, helping agents find the right integration faster across 18,651 tools.
Defender
Use open-source prompt injection detection and guardrails to inspect tool inputs before execution, reducing risky agent behavior in production.
Scoped permissions
Control access with scoped permissions, per-user credential isolation, and automatic token refresh so each agent acts only within approved boundaries.
What does StackOne integrate with?
- Workday
- OneLogin
- Docebo
- BambooHR
- Slack
- Salesforce
- HubSpot
- Greenhouse
- Ashby
- HiBob
- Lever
- Personio
- Okta
- ServiceNow
- Jira
- GitHub
- Notion
- Asana
- ClickUp
- Linear
- SAP SuccessFactors
- DocuSign
- Intercom
- Gong
- Drata
- Gusto
- Lattice
- Bullhorn
- SmartRecruiters
- Factorial
What are StackOne's use cases?
Platform engineers expose SaaS actions
Platform engineers use StackOne to expose many SaaS actions to agents without hand-building each OAuth flow, using Connect and Agent Auth to keep access production-ready. They can also use Connector Builder to add custom actions when a business system isn't covered yet.
AI agents operate with controls
Product teams use StackOne to let AI agents act across business systems with real-time execution, using Scoped permissions and Permissions API to limit what each agent can read or change. Secure and Defender help keep tool use controlled as workflows move from test to production.
Workflow automation across business tools
Workflow automation teams use StackOne to build reliable read/write automations across HR, recruiting, CRM, and support tools, using 270+ AI agent integrations and 18,000+ pre-built actions to move data and trigger actions quickly. Tool Discovery helps them find the right action without stitching together separate integrations.
AI infra teams standardize access
AI infrastructure teams use StackOne to give the same integration layer to MCP, SDK, and API consumers, using MCP and API for consistent access across agent frameworks. Optimize and real-time infrastructure help keep execution fast while teams reuse one integration surface.
How does StackOne work?
- Connect your first SaaS system in StackOne Connect Hub, then let managed auth handle credentials and multi-tenancy so agents can start using approved actions safely.
- Use Tool Discovery to search for the right business action, then test it in the action playground before wiring it into your agent or workflow.
- Add custom coverage with Connector Builder when a needed app or action is missing, and publish it alongside pre-built integrations in the same workspace.
- Turn on Scoped permissions, Permissions API, and Defender to restrict what each agent can access and to add prompt-injection protection around tool use.
- Ship through MCP, SDK, or API, then monitor audit trails and observability to track execution, troubleshoot failures, and keep integrations reliable over time.
How much does StackOne cost?
Starter
Free- 270+ pre-built connectors
- Managed auth & multi-tenancy
- 1 custom connector via the Connector Builder
- Action playground
- In-app chat support
- MCP protocol, AI action SDK, API
- Up to 1,000 free action calls per month.
- $3 per 1,000 calls thereafter.
Core
Contact Us- All Starter features, plus:
- Customize pre-built connectors
- Unlimited custom connectors
- A2A protocol
- Multi-region data processing
- Dedicated Slack channel
- SOC2 Type II certification
- $0.30 per 1,000 action calls or lower
- With volume discounts.
Enterprise
Contact Us- All Core features, plus:
- StackOne professional services
- Unlimited projects
- Any AWS or GCP region data processing
- On-premise deployment
- Custom SLAs and uptime guarantees
- $0.30 per 1,000 action calls or lower
- With volume discounts.
Frequently asked questions
What is StackOne?
StackOne is an agent-to-app connectivity platform for product, platform, and AI infrastructure teams that routes agents through managed auth and secure execution. It combines Connect, Optimize, Secure, Connector Builder, MCP, and Tool Discovery to reach 270+ integrations and 18,000+ actions. Customers include Drata, Introist, and Popp. Plans run Starter free, with Core and Enterprise both custom pricing.
How much does StackOne cost? Is it free?
StackOne has a free plan, with paid tiers including Core at Contact Us, Enterprise at Contact Us.
What is StackOne used for? Who is it for?
StackOne is used for Connect, Optimize, and Secure. It's built for Platform engineers, Product teams that want AI agents to operate across business systems with real-time execution and permissions control, and AI infrastructure teams that need MCP, SDK, and API access for the same integration layer.
Does StackOne have an API and what does it integrate with?
StackOne doesn't publish a public API. It integrates with Workday, OneLogin, Docebo, BambooHR, Slack, and 25 more.
Editor's read
Starter includes 1 custom connector and up to 1,000 free action calls per month, then $3 per 1,000 calls. Check whether your expected connector count and call volume will push you into Core or Enterprise before you commit.
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