FAIRVISORFairvisor vs. Kong
The Situation
Kong is a full API gateway platform. It is broad and powerful: routing, auth, plugins, transformations, and service mesh integrations.
Fairvisor is a drop-in LLM endpoint and enforcement layer: point your LLM clients at Fairvisor by changing the base URL — no SDK code changes — and get rate limits, budgets, loop detection, and policy-driven protection at very low latency.
Comparison
| Capability | Fairvisor | Kong Gateway |
|---|---|---|
| Focus | Drop-in LLM enforcement endpoint (no SDK changes) | General-purpose API gateway |
| Drop-in deployment | Yes — change base URL + API key format, no SDK changes | No (requires gateway/plugin configuration) |
| AI-specific features | Drop-in LLM endpoint, loop detection, token budgets, circuit breaker, streaming enforcement | AI Gateway plugin (basic) |
| Rate limiting | Token bucket + cost-based + token-based (TPM/TPD) | Token bucket, sliding window |
| Cost control | Budget enforcement with staged actions | No |
| Loop detection | Built-in, configurable | No |
| Latency profile | In-process decision path with low-latency targets | Depends on gateway/plugin path and deployment model |
| Deployment | Edge-only or with SaaS | Gateway + Konnect SaaS |
| OSS | Edge is fully OSS | Community Edition (limited) |
| Learning curve | Policy-focused, narrow scope | Full gateway with larger surface area |
When to Use Fairvisor
- You want LLM enforcement without touching application code — change the base URL, nothing else.
- You need loop detection, cost budgets, and staged enforcement actions.
- You want a focused, open-source tool with fast policy decisions.
When to Use Kong
- You need a full API gateway with auth, transformations, plugins, and service mesh support.
- You want a broad platform for many gateway concerns beyond enforcement.
Use Them Together
- Kong handles routing, auth, transformations, and gateway lifecycle.
- Fairvisor runs as the enforcement decision layer.
- You get platform breadth from Kong and AI-specific controls from Fairvisor.