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Preloop

AI agents are powerful, but one wrong action could be catastrophic. Preloop is an agentic automation platform with built-in human approval layer. AI agents automate routine work across your systems, and when they attempt risky actions (deployments, refunds, data changes), Preloop intercepts and routes them for approval via mobile, Slack, or Teams before execution. You can use Preloop for automation only, approval gates only, or both together depending on your needs.

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preloop.ai
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What is it AI agents are powerful, but one wrong action could be catastrophic. Preloop is an agentic automation platform with built-in human approval layer. AI agents automate routine work across your systems, and when they attempt risky actions (deployments, refunds, data changes), Preloop intercepts and routes them for approval via mobile, Slack, or Teams before execution. You can use Preloop for automation only, approval gates only, or both together depending on your needs.
Pricing Paid
Free tier Yes
Platform Web Application
API Yes
Best for Preventing accidental production deployments by AI coding assistants, Controlling database modifications and sensitive operations
Domain registered 2025

Data updated Aug. 1, 2026

What does Preloop do?

Preloop is an MCP (Model Context Protocol) proxy that acts as a safety layer between AI agents and the tools they use. It intercepts potentially risky tool calls—like database writes, deployment commands, or payment processing—and pauses them for human approval before execution. This prevents AI agents from taking dangerous actions autonomously while allowing safe operations to proceed normally.

The system works by proxying your existing MCP connections through Preloop's server, requiring no code changes or SDK integration. It supports advanced approval policies including conditional rules, team quorum requirements, escalation procedures, and integrates with notification channels like Slack, Mattermost, and email. Preloop maintains a complete audit trail of all approval decisions, providing visibility into every sensitive action your AI agents attempt.

This tool is particularly valuable for development teams, DevOps engineers, and organizations using AI coding assistants like Claude Code, Cursor, or Windsurf. Real-world use cases include preventing accidental production deployments, controlling database modifications, securing financial transactions, and maintaining compliance while still benefiting from AI-assisted development workflows.

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Key features

What makes it stand out
01
Intercepts risky MCP tool calls for human approval before execution
02
Maintains complete audit trails of all approval decisions and actions
03
Supports advanced approval policies with conditions and team quorum
04
Integrates with notification channels including Slack and Mattermost
05
Works with any MCP client without requiring code changes or SDK

Who is Preloop for?

Who benefits most from this tool
Preventing accidental production deployments by AI coding assistants
Controlling database modifications and sensitive operations
Securing financial transactions initiated by AI agents

Pricing

Free tier available — start without a credit card

Open Source

Free
  • Self-hosted deployment
  • MCP proxy & tool management
  • Single-user approvals
  • Email & mobile notifications
  • Issue tracker integration
  • Vector search & duplicates
  • Agentic flows
  • Community support

Teams

$24.0/month billed yearly

Everything in Open Source, plus:

  • Cloud-hosted (managed)
  • RBAC & team management
  • CEL conditional approvals
  • Team-based approvals (quorum)
  • Approval escalation
  • Slack & Mattermost notifications
  • Audit logging
  • 30-day free trial
  • Email support

Enterprise

Custom

Everything in Teams, plus:

  • Self-hosted deployment option
  • SSO, OIDC, SCIM support
  • SLA commitments
  • Dedicated support channels
  • Priority feature requests

Trust & presence

Domain Domain registered 2025

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