WARDIN VS TETRATE

Tetrate can stop a request. Wardin can prove what happened — and who approved the exception.

When AI spend goes wrong, "the gateway blocked it" isn't an answer — someone will be asked who raised the limit, under what policy, for how long, and for proof. Tetrate's Agent Router is the most direct comparison on this site, and we'll say so plainly: a real Envoy-based AI gateway from the creators of Envoy and Istio, enforcing inline token budgets, token-aware rate limits, and FINOS-aligned guardrails across 16 providers, hosted or self-hosted, in Fortune 200 and US federal deployments. It genuinely enforces in the request path — this is not a routing tool we get to dismiss. But its governance ends where enforcement ends: budgets are limits with threshold alerts, and nowhere in its public product surface could we find an approval workflow with retained history or a tamper-evident record of what each call did. Wardin treats every request as an accountable event. A budget exception is requested, approved for a bounded window, auto-reverted at expiry, and kept as audit history. Every gateway-routed call — allowed or blocked — emits an ED25519-signed, hash-chained receipt that can be verified later. Tetrate enforces spend. Wardin makes it answerable.

FEATURE COMPARISON

Where each product actually stands today.

CAPABILITYWARDINTETRATE
In-request-path enforcement (blocks a call before the provider)✓Yes — the gateway sits in the path; budget/policy checks run before every provider call✓Yes — Envoy-based gateway; inline token-budget enforcement and rate limiting in the request path
Budget hard-stops and rate limiting on LLM spend✓Yes — atomic Redis Lua checks per key/user✓Yes — inline token-budget enforcement with automatic cheaper-model fallback, token-aware RPM/TPM-style rate limiting
Prompt-injection / PII / policy guardrails✓Yes — heuristic + pluggable ML detectors, enforced in-path✓Yes — FINOS AI Governance Framework-aligned rules, evaluated inline in the Envoy filter chain (~1-5ms added latency)
Provider/model breadth✕4 provider families, direct (Anthropic, OpenAI, Bedrock, Vertex/Gemini)✓16 providers unified behind one translation layer (via Envoy AI Gateway), incl. self-hosted deployment for data residency
Native Anthropic Messages API passthrough for agentic clients (no translation hop)✓Yes — ANTHROPIC_BASE_URL points straight at us, client unchanged, native cache_control breakpoints and split cache-token cost accounting preserved✕Unifies providers behind one OpenAI-compatible interface — Anthropic Messages traffic passes through a protocol-translation layer
Time-bounded budget-increase approval workflow with full audit history✓Yes — configurable in a UI, no code; auto-reverts at expiry✕Inline budget enforcement and threshold alerts; no approval-workflow or audit-history feature found in its public product surface
Signed, hash-chained tamper-evident audit receipts✓Yes — ED25519-signed chain, one receipt per call✕No equivalent found
Outcome attribution (accepted work per dollar)✓Yes — quality-gated scoring tied to accepted work✕No
WHERE TETRATE IS AHEAD

On pedigree and production scale, Tetrate is far ahead of us: built by the creators of Envoy and Istio, running in Fortune 200 financial, telco, and retail deployments and US federal environments today. It unifies 16 providers behind one interface against our four direct families, and offers a genuine self-hosted deployment for regulated industries that can't route traffic through a hosted third party — something we don't offer. Its token-aware traffic engineering (GPU resource optimization, outage-based failover) is more mature than our fallback and retry logic, and its guardrails are inline and FINOS-aligned. It enforces budgets and rate limits in the request path, the same as we do. What that maturity buys is control of the traffic. What we could not find it producing is the record of control — who approved an exception, when it expired, and cryptographic proof of each call. That record is the product we build.

WHERE WARDIN IS AHEAD

Where Tetrate enforces, Wardin makes enforcement answerable: a budget exception is requested, approved for a bounded window, and auto-reverts at expiry with its full decision history retained, and every gateway-routed call — allowed or blocked — emits an ED25519-signed, hash-chained receipt that can be verified later. It also passes agentic traffic (Claude Code, Cursor) through the native Anthropic Messages API with cache-token economics intact, no protocol-translation hop. Nothing in Tetrate's public product surface describes an approval workflow with retained history, a signed per-call record, or native Anthropic passthrough.

WHEN TO CHOOSE EACH

Choose Tetrate if you already run Istio/Envoy and want the same operational model extended to AI traffic, need 16-provider breadth, or require self-hosted deployment for data residency. Choose Wardin if a block alone doesn't close your loop: when finance needs budget exceptions requested, approved for a bounded window, and auto-reverted with the decision trail retained; when an auditor needs a signed, hash-chained receipt for every gateway-routed call rather than unsigned logs someone has to vouch for; and when your agentic traffic (Claude Code, Cursor) should speak the native Anthropic Messages API with cache-token economics intact, not pass through a protocol-translation layer. Enforcement stops a request. Governance is being able to prove it — and prove the exception that let one through.

See the enforcement — and the signed receipt — not just the pitch.

Point your SDK at one base URL and get budget hard-stops, policy enforcement, and a signed, hash-chained receipt for every call — from the first request.

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