Zehrava Gate vs Tetrate Agent Router Service
Zehrava Gate and Tetrate Agent Router Service solve different parts of the "agents in production" problem. Tetrate Agent Router Service is an enterprise AI gateway. Zehrava Gate is a write-path checkpoint for agent actions.
Need an Agent Router specific comparison? Read Zehrava Gate vs Tetrate Agent Router Service.
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Zehrava Gate vs Tetrate: what is the difference?
Tetrate Agent Router Service governs model and MCP tool traffic at the gateway layer. Tetrate Agent Router Service unifies model access, adds fallback routing, and tracks usage and spend. Tetrate Agent Router Service also markets MCP audit logging and compliance evidence for regulated environments.
Zehrava Gate governs agent actions before execution on the write path. Zehrava Gate makes an agent submit an intent before the agent writes to production. Zehrava Gate approves, blocks, or holds the intent. A reviewer can approve high-risk intents in a queue. Zehrava Gate stores an immutable audit ledger tied to an intentId. The ledger records proposed → policy_checked → approved → execution_requested → execution_succeeded.
Choose Tetrate Agent Router Service when you need an enterprise gateway for models and tools across many teams. Choose Zehrava Gate when you need action authorization, a human approval queue, and deterministic YAML policy for production writes.
Full Tetrate breakdown
Tetrate is an Envoy and Istio company. Tetrate sells enterprise gateways and service mesh products. Tetrate then extends the same infrastructure control plane into AI routing and MCP tooling.
LLM gateway + routing
Route model traffic through a unified endpoint. Add fallback routing and model catalogs. Track usage and spend across providers.
MCP gateway + tool governance
Expose tools through MCP catalogs. Authenticate tool access. Filter tool availability by profile and context.
Guardrails + DLP
Enforce gateway-side guardrails. Reduce sensitive data loss risk. Detect policy violations and route accordingly.
Cost governance + signals
Monitor token and API spend. Alert on spikes and quota violations. Compare usage across teams, apps, and models.
Why Tetrate can win enterprise deals
Tetrate already owns application networking in many enterprise environments. The AI products ride on a mature gateway and mesh footprint.
- Tetrate Platform Services: One management plane for gateways, load balancers, and service mesh across clusters and clouds.
- Tetrate Service Bridge: Centralized governance, mTLS, RBAC, traffic management, and observability for service-to-service connectivity.
- Tetrate Enterprise Gateway for Envoy: Hardened Envoy Gateway builds plus enterprise support. Includes WAF and OpenID Connect support.
- Tetrate Application Gateway: Intent-driven ingress orchestration across multi-cloud and hybrid environments.
Tetrate sells a platform. Zehrava Gate sells a checkpoint.
What Zehrava Gate does
Zehrava Gate is a deterministic write-path control plane for AI agents. An agent submits an intent before the agent executes a production write. Zehrava Gate evaluates a YAML policy. Zehrava Gate returns one outcome. The outcome is approved, blocked, or pending_approval.
Deterministic YAML policy
Evaluate policies deterministically. Run field checks, environment rules, and rate limits on every intent. Use the same policy across every agent.
Human approval queue
Hold high-risk intents for review. Approve and reject with reviewer roles. Store an audit trail per intent.
Zehrava Gate focuses on write actions. A write action includes sending an email, charging a card, refunding a transaction, updating a CRM, and posting to an external system.
Comparison table
| Category | Tetrate Agent Router Service | Zehrava Gate |
|---|---|---|
| Core layer | Gateway and networking stack for model and MCP traffic | Write-path checkpoint for agent actions |
| Primary outcome | Route and govern requests across models and tools | Approve, block, or hold an action before execution |
| Human approval | Not marketed as a built-in approval queue | Built-in approval queue + reviewer roles |
| MCP support | Native MCP gateway | LangChain and LangGraph wrappers shipped. MCP wrapper is the next logical extension. |
| Cost governance | Spend analytics, alerts, routing for cheaper models | Out of scope. Gate governs actions, not token spend. |
| Policy model | Managed configuration inside an enterprise platform | YAML policy files in your repo |
| Deployment | Managed service and enterprise platform footprint | Self-hosted server + local policies |
| Buyer | Platform and infrastructure teams | Developers shipping agents and reviewers approving writes |
How teams use both
Most corporate stacks need two layers. One layer governs model and tool traffic. One layer authorizes production writes.
Agent runtime │ ├─ model traffic → Tetrate gateway layer → model response │ └─ write action → Zehrava Gate intent checkpoint → approved? → execute
Zehrava Gate stays small on purpose. Gate decides whether the action runs. Tetrate Agent Router Service decides how requests route and how costs get controlled.
Decision guide
- Pick Zehrava Gate when you need a reviewer queue and a deterministic policy decision for outbound actions. Choose Zehrava Gate for email sends, CRM writes, refunds, and card charges.
- Pick Tetrate Agent Router Service when you need unified access to models, fallback routing, MCP tool governance, and cost visibility across many teams.
- Run both when your agent program is large. Put Tetrate at the model and tool edge. Put Zehrava Gate on the write path.
Try Zehrava Gate
Open the demo. Read the docs. See the queue and the audit ledger.
Open the demo Read the docsRead the Tetrate docs and the Tetrate blog after you decide the enforcement point. The enforcement point decides the architecture.