# Portkey vs SealGate | MCP Gateway Comparison

Portkey 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/portkey-vs-sealgate

---

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AI gateway

# Portkey vs SealGate

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

Last updated: September 2026

Portkey. Portkey is an LLM gateway (1,600+ models) with a dedicated MCP Gateway for enforcement gating, and a Lasso Security partnership that adds real-time guardrails at the protocol level.

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: Portkey is an LLM gateway with security added through its Lasso partnership; SealGate is security-native, with runtime enforcement, DLP, and shadow-MCP discovery as the core product.

## Portkey 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 | Portkey |
| --- | --- | --- |
| How local stdio MCP servers are handled. Whether your local MCP server stays on the device or is shipped elsewhere. | Tunnel in place (Yes) | Re-expose HTTP (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) | MCP + API (Partial) |
| Runtime enforcement. Blocks a dangerous tool call before it executes, not just after the fact. | ✓ Yes | ~ Partial |
| DLP, PII and secrets scanning. Inspects tool inputs and outputs for sensitive data at runtime. | ✓ Yes | ~ Partial |
| Prompt injection and tool-poisoning defense. Detects and stops injection, tool poisoning and rug-pull attacks. | ✓ Yes | ~ Partial |
| 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 | ✓ Yes |
| 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 | ✓ Yes |
| 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 | ✓ Yes |
| Low latency overhead. Minimal added latency on the tool-call path. | ✓ Yes | ✓ Yes |
| Open source core. An open, inspectable core rather than a closed proxy. | ✕ No | ~ Partial |

›

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

## Where SealGate is different

- SealGate is security-native: runtime enforcement, DLP and injection defense are the core product, not a partner add-on. Portkey's security guardrails come through its Lasso Security partnership.
- SealGate runs an endpoint agent and discovers shadow MCP servers; Portkey is a cloud and self-host control plane with no on-device discovery.
- SealGate tunnels local stdio servers in place; Portkey needs local stdio servers exposed as HTTP endpoints first.

## 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/?utm_source=sealgate.ai&utm_campaign=seo-comparison&utm_content=portkey-vs-sealgate) [Book a Demo](https://sealgate.ai/contact)

## Frequently asked questions

For how gateways work in general and what to look for, see our [guide to choosing an MCP gateway](https://sealgate.ai/guides/mcp-gateway) .

Is SealGate a good alternative to Portkey? Yes. Portkey is an LLM gateway (1,600+ models) with a dedicated MCP Gateway for enforcement gating, and a Lasso Security partnership that adds real-time guardrails at the protocol level. SealGate is 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. If runtime data security is the priority, SealGate is a strong alternative.

What does SealGate do that Portkey does not? SealGate is security-native: runtime enforcement, DLP and injection defense are the core product, not a partner add-on. Portkey's security guardrails come through its Lasso Security partnership.

## Sources

Claims about Portkey 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.

- [Portkey](https://portkey.ai)

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