# n8n vs SealGate | MCP Gateway Comparison

n8n vs SealGate compared across runtime enforcement, DLP, stdio handling, device-level management and audit. See where each MCP gateway fits and why teams pick SealGate for runtime agent data security.

Source: https://sealgate.ai/comparison/n8n-vs-sealgate

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Workflow automation platform

# n8n vs SealGate

How n8n and SealGate compare for securing AI agents and their MCP tool calls, and where each one fits.

Last updated: September 2026

n8n. n8n is a fair-code (source-available), self-hostable workflow-automation platform where you build integrations and AI-agent workflows on a visual node canvas, with 400+ connectors and native MCP client and server nodes.

SealGate. A runtime agentic data firewall that blocks dangerous tool calls before they execute, scans tool traffic for data loss and prompt injection, discovers shadow MCP servers on the device, and streams a provable audit trail to your SIEM.

Bottom line: n8n is where you build and run agent and integration workflows; SealGate is the runtime security firewall that governs and inspects the tool traffic those agents produce, so teams often run both.

## n8n vs SealGate, feature by feature

SealGate leads with the rows at the top, its clearest points of difference, then the parity rows every enterprise gateway is expected to cover.

| Capability | SealGate | n8n |
| --- | --- | --- |
| How local stdio MCP servers are handled. Whether your local MCP server stays on the device or is shipped elsewhere. | Tunnel in place (Yes) | Not an MCP gateway (No) |
| Local stdio servers stay on-device. The server keeps running on the machine, with no host-and-lift and no HTTP re-expose. | ✓ Yes | ✕ No |
| Device-level management. An endpoint agent that discovers and governs MCP activity on the device itself. | ✓ Yes | ✕ No |
| Interface coverage. Whether the gateway governs only the MCP protocol, or the agent CLI and LLM API too. | MCP + CLI (Yes) | Workflow nodes (No) |
| Runtime enforcement. Blocks a dangerous tool call before it executes, not just after the fact. | ✓ Yes | ✕ No |
| DLP, PII and secrets scanning. Inspects tool inputs and outputs for sensitive data at runtime. | ✓ Yes | ✕ No |
| Prompt injection and tool-poisoning defense. Detects and stops injection, tool poisoning and rug-pull attacks. | ✓ Yes | ✕ No |
| Gateway holds the credential. The gateway issues the final call so the agent cannot bypass policy and retry. | ✓ Yes | ~ Partial |
| Shadow MCP discovery. Finds unauthorized MCP servers before they are used. | ✓ Yes | ✕ No |
| Provable per-call audit. A receipt for every call: agent, tool, policy version, result. | ✓ Yes | ~ Partial |
| SIEM integration and export. Streams audit events to Splunk, Sentinel and other SIEMs. | ✓ Yes | ~ Partial |
| SSO, SCIM and RBAC. Enterprise identity, group sync and role-based access. | ✓ Yes | ✓ Yes |
| Tool-level policy. Read and write tiers, per-tool rules and human-in-the-loop approvals. | ✓ Yes | ~ Partial |
| Self-host, on-prem or VPC. Run it in your own environment for data residency. | ✓ Yes | ✓ Yes |
| Compliance mapping. Evidence mapped to SOC 2, NIST AI RMF and the EU AI Act. | ~ Partial | ~ Partial |
| Low latency overhead. Minimal added latency on the tool-call path. | ✓ Yes | – Not publicly verified |
| Open source core. An open, inspectable core rather than a closed proxy. | ✕ No | ✓ Yes |

›

✓ Strong or native ~ Partial or via a partner ✕ Not offered – Not publicly verified

## Where SealGate is different

- n8n orchestrates agents and tools; it does not sit inline as a security control on agent tool calls, with no runtime DLP, PII or secrets scanning, no prompt-injection or tool-poisoning defense, and no pre-execution blocking of dangerous calls.
- SealGate is a device-level endpoint agent that discovers and governs MCP activity on the machine, including shadow-MCP discovery, and keeps local stdio MCP servers on-device; n8n has no endpoint agent and is not an MCP governance gateway.
- SealGate produces provable per-call security audit (agent, tool, policy version, result) with a CEL policy engine; n8n offers workflow execution logs and enterprise log streaming, which is operational logging rather than agent-tool-call security telemetry.
- Credit to n8n: a source-available, fully self-hostable, air-gappable core with SSO, SAML, LDAP, RBAC and SOC 2 Type 2, strong platform hygiene that is simply not an agent security firewall.

## How SealGate delivers this

The capabilities above are covered in depth on the product, security and deployment pages.

[How the SealGate gateway works](https://sealgate.ai/product) [Runtime DLP and prompt-injection defense](https://sealgate.ai/security) [Self-hosting and data residency](https://sealgate.ai/self-hosting)

## Get AI agents signed off by security, faster

Adopt AI agents and connect them to real data without leaking it. Start free, or book a walkthrough.

[Start Free](https://dashboard.sealgate.ai) [Book a Demo](https://sealgate.ai/contact)

## Frequently asked questions

Is SealGate an alternative to n8n? No. They solve different problems: n8n builds and runs automation and AI-agent workflows, while SealGate is a runtime security and DLP firewall that inspects and enforces policy on the agent tool traffic. Teams commonly run both, building agents in n8n and governing their tool calls with SealGate.

Doesn't n8n already secure my AI agents? n8n secures the platform (SSO, RBAC, self-host, SOC 2) and stores credentials for its own nodes, but it does not scan tool inputs and outputs for sensitive data, stop prompt injection or tool poisoning, block dangerous tool calls at runtime, or discover unauthorized MCP servers on the endpoint.

What does SealGate do that n8n does not? n8n orchestrates agents and tools; it does not sit inline as a security control on agent tool calls, with no runtime DLP, PII or secrets scanning, no prompt-injection or tool-poisoning defense, and no pre-execution blocking of dangerous calls.

## Sources

Claims about n8n are drawn from its own public documentation, last reviewed September 2026. If something is out of date, tell us at [hello@sealgate.ai](mailto:hello@sealgate.ai) and we will correct it.

- [n8n docs: compare editions](https://docs.n8n.io/deploy/host-n8n/community-edition-features)
- [n8n docs: set up SSO](https://docs.n8n.io/hosting/securing/set-up-sso/)
- [n8n Sustainable Use License](https://docs.n8n.io/sustainable-use-license/)
- [n8n (GitHub)](https://github.com/n8n-io/n8n)

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