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What is StackOne?
StackOne is an integration gateway platform for AI agents that connects enterprise applications through 630+ pre-built connectors spanning 46,000+ actions. It provides unified integration infrastructure enabling AI agents to securely access and execute workflows across HRIS, ATS, CRM, accounting, marketing, and other enterprise SaaS systems.
StackOne news
StackOne secures €17.6M Series A led by GV
Funding round led by Google Ventures, expanded from $3.6M seed. Customers include Drata, Kinfolk, Synthesia, Reachdesk, and others across compliance automation, HR, and recruitment AI use cases.
Source: Google Ventures ↗
Key features
630+ Pre-Built Connectors
Production-ready connectors covering HRIS, ATS, LMS, CRM, IAM, documents, messaging, accounting, marketing, and support systems with 46,000+ available actions
AI Connector Builder
Build custom connectors for any API (REST, SOAP, OData, proprietary systems) using natural language prompts; integrates with Claude Code and StackOne's own agent in dashboard
Multiple Protocol Support
Connect via Model Context Protocol (MCP), A2A, REST APIs, and proprietary SDKs
Prompt Injection Defense (Defender)
Scans tool responses for prompt injection attacks with claimed 89% detection accuracy; Defender Core (free) and Defender Premium (paid) tiers
Granular Governance
Role-based access control, SSO (Google/SAML), MFA, granular permissions at action/field/user levels, and field-level policies introduced via Tool Policies feature
Tool Discovery & Deep Query
Surface only relevant actions to reduce context bloat; Deep Query searches and aggregates synced provider records without calling the provider
Agent Webhooks
Trigger agentic workflows on app events—filtered, enriched, and trimmed for agent action without polling
Data Sync & Observability
Real-time data sync capabilities, comprehensive audit logging, action execution tracking with configurable retention (1-90 days)
Token Optimization
Claims up to 80% token savings on tool-heavy operations through intelligent action filtering and data caching
StackOne pricing
Two deployment models (Gateway for internal use, OEM for product embedding). Free tiers require no credit card. Credits measure consumption: 1 credit = 1 tool call/API call; advanced features (browser use, premium defense, data sync) cost more. Additional credit bundles: $60 per 20,000 credits (Starter), $20 per bundle (Team).
| Plan | Price | What's included |
|---|---|---|
| Starter (Gateway) | Free | 1,000 credits/seat/month, all 630+ connectors, managed authentication, Defender Core, 1-day log retention, Google SSO, 1 project |
| Team (Gateway) | $600/month | 5,000 credits/seat/month, AI Connector Builder with 3 custom slots, Tool Policies, Data Sync, Defender Premium, SAML SSO, 7-day log retention, 3 projects |
| Enterprise (Gateway) | Custom pricing | Custom credit volume, unlimited custom connectors, browser use actions, SCIM/SSO enforcement, SOC 2 Type II report & BAA, BYOK encryption, on-premise/VPC deployment, 30-day log retention, SIEM export, dedicated Slack support, unlimited projects |
| OEM Core | Free | Unlimited end customers, white-label connectors and auth UI, multi-tenant isolation, Defender Core, 7-day log retention, Google SSO |
| OEM Enterprise | Custom pricing | Volume discounts on credits, unlimited AI Connector Builder slots, SAML/SCIM, audit logs and SIEM export, SOC 2 Type II & BAA, BYOK encryption, 90-day log retention, 10 project workspaces |
Pros & cons
Pros
- + Fastest integration deployment: customers report reducing new ATS/CRM integration time from months to 2-4 weeks
- + No custom infrastructure required: eliminates need to build authentication, permission layers, and integration scaffolding
- + Real-time, bidirectional actions across 630+ systems with governance by default
- + AI Connector Builder enables rapid custom integration creation without manual YAML/coding (team tier and above)
- + Enterprise-grade security: SOC 2 Type II, GDPR, HIPAA, CCPA compliance standard across all tiers; never stores personal data by default
- + Observability and audit trails: comprehensive logging for compliance and debugging
- + MCP integration with Claude Code allows developers to build connectors using their preferred AI tools
Cons
- − Custom connector builder requires Team plan ($600+/month); Starter tier limited to pre-built connectors only
- − Advanced features (SAML SSO, SCIM, BYOK, on-premise deployment) limited to Enterprise tier
- − Credit model may add unpredictability to costs at scale; bundle pricing varies by tier
- − Limited to available connectors; while extensive, niche systems may require custom builder investment
- − AI Connector Builder currently supports Claude Code only for local development
Who is StackOne best for?
- • AI agent platforms needing multi-system integration (recruiting, HR, finance, support automation)
- • SaaS products embedding AI agent functionality and needing white-label integrations for customers
- • Enterprises rolling out AI agents safely with governance, audit trails, and compliance requirements
- • Teams building AI-powered workflows requiring real-time bidirectional data across enterprise systems
- • Development teams prioritizing rapid time-to-market over building integration infrastructure in-house
