Portkey vs. Kong AI Gateway vs. LiteLLM: AI Gateways & LLM Routers 2026
Compare Portkey (all-in-one AI Gateway + Prompt Library + Observability + Guardrails, 200+ providers, $49-$499/mo), Kong AI Gateway (Kong Gateway extension; Verizon, Honeywell, Cisco, Yahoo; $50K-1M+/yr), and LiteLLM (open-source universal SDK + proxy; 10,000+ stars; used by Anthropic and Adobe; free self-hosted). Picking guide for LLM cost -50%, latency -40%, multi-provider failover, and semantic cache.
Verdict:Startup-to-mid-market LLM apps (Postman pattern) needing fast all-in-one (routing + cache + observability + guardrails + prompt management) → Portkey. Enterprises (Verizon/Cisco pattern; existing Kong customers) running unified API + AI gateway → Kong AI Gateway. Developers wanting open-source self-host with minimal cost → LiteLLM Proxy. Cloudflare Workers stacks (edge AI) → Cloudflare AI Gateway.
Table of Contents
Portkey & Kong AI Gateway Overview
Portkey
$15M, 1,000+ customers — Postman, Springworks, Haptik. All-in-one AI Gateway + Prompt Library + Observability + Guardrails. 200+ providers, semantic cache. $49-$499/mo (Cloud or self-hosted).
Learn more about Portkey →Kong AI Gateway
Kong (the $1.4B platform), 900+ enterprise customers — Verizon, Honeywell, Cisco, Yahoo, Forbes. Kong Gateway extension with AI proxy + Prompt Guard + semantic caching + rate limiting; runs alongside the API gateway. $50K-1M+/yr.
Learn more about Kong AI Gateway →Feature & Pricing Comparison
| Feature | Portkey | Kong AI Gateway |
|---|---|---|
| Strength | All-in-one AI gateway (routing + cache + observability + guardrails + prompt management); fast SMB / mid-market deploy | Unified API + AI gateway operations; enterprise-native; 900+ enterprise customers; Kong Plus bundle |
| Price | $49-$499/mo (Cloud or self-hosted) | Kong Plus / Enterprise bundle $50K-1M+/yr |
| Target | Startup → enterprise; LLM-centric apps | Enterprise (Kong customers); unified API + LLM operations |
| Customers | Postman, Springworks, Haptik, Mineral.ai | Verizon, Honeywell, Cisco, Yahoo, Forbes |
| Providers | 200+ (OpenAI, Anthropic, Google, Cohere, Mistral, Bedrock, Vertex) | Major providers + custom endpoints |
| Semantic cache | Built-in (embedding-similarity cache) | Semantic Caching plugin |
| Guardrails | Built-in PII redaction + prompt-injection + output filter | Prompt Guard + AI Validation plugin |
| Self-hosting | Cloud and self-hosted both supported | Kong self-hosted or Konnect Cloud |
Our Verdict
Our Verdict
Startup-to-mid-market LLM apps (Postman pattern) needing fast all-in-one (routing + cache + observability + guardrails + prompt management) → Portkey. Enterprises (Verizon/Cisco pattern; existing Kong customers) running unified API + AI gateway → Kong AI Gateway. Developers wanting open-source self-host with minimal cost → LiteLLM Proxy. Cloudflare Workers stacks (edge AI) → Cloudflare AI Gateway.
Recommendations by Use Case
Startup-to-mid-market all-in-one
Postman references; 200+ providers; built-in cache + observability + guardrails; $49-$499/mo
Enterprise API + AI unified
Verizon/Cisco references; Kong Gateway extension; unified API + LLM ops; Konnect Cloud
Open-source self-host
10,000+ stars; used by Anthropic and Adobe; universal SDK + proxy; free self-hosted
Edge AI stack
Workers AI native; free tier; analytics + caching + rate limit + logs
LLM observability first
Khan Academy / Twilio references; trace + prompt management + eval; open source + cloud
LangChain-native
Klarna / Elastic references; best-in-class LangChain tracing + evaluation + annotation
Detailed Reviews
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