Five Enterprise AI Gateways Compared on Security, Audit, and Tenant Isolation

A detailed comparison of five enterprise AI gateways — Bifrost, LiteLLM, Kong, Cloudflare, and Vercel — evaluates each against five core procurement criteria: identity management, authorization, auditability, tenant isolation, and deployment control. Bifrost stands out for HMAC-signed audit logs, row-level access controls between teams, and SCIM 2.0 support, with options for on-premises and air-gapped deployment. LiteLLM offers the broadest provider coverage at over 140 integrations but requires a more complex Postgres-and-Redis production setup. Cloudflare is the only gateway that inspects prompt content in transit using DLP and guardrails, though its account-scoped tokens create tenant isolation challenges. Kong consolidates AI and non-AI traffic under one control plane but reserves most enterprise governance features for paid tiers, while Vercel offers per-request governance metering and audit log drains but remains a fully managed service.
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