Spro
OpenAI-compatible gateway with routing, guardrails and observability built in
LLM Gateways
LLM gateways put one API in front of many model providers and handle routing, fallbacks, caching, guardrails, cost controls and logging in one place. Compare them on features, hosting and pricing, or put any two side by side.
12 gateways compared · Updated 2026-10-26
Top 5 LLM gateways
Ranked on reliability, security, visibility, compatibility, deployment options and pricing clarity.
OpenRouter
One OpenAI-compatible API for hundreds of models from many providers
Respan
AI router with built-in observability and automated evals
Portkey
AI gateway with observability, guardrails and prompt management
LiteLLM
Open-source Python SDK and proxy server that speaks the OpenAI format to many providers
More LLM gateways
TrueFoundry
Enterprise AI gateway with governance and monitoring, deployable in your own environment
Cloudflare AI Gateway
AI gateway that runs on Cloudflare's network
Vercel AI Gateway
One endpoint for many models, built into the Vercel platform and AI SDK
Requesty
Unified AI gateway and LLM router for 600+ models
OrcaRouter
One AI gateway with adaptive routing and governance
FastRouter
AI gateway with 0% markup: one OpenAI-compatible API for 200+ models
Concentrate AI
One API to switch between every LLM, with spend controls and zero-data-retention routing
At a glance
The main differences across every gateway in the directory.
| Gateway | Hosting | Starting price | Fallbacks | Guardrails | Self-host | Open source |
|---|---|---|---|---|---|---|
| Spro | Hosted | Free trial · 0% markup on tokens | ||||
| OpenRouter | Hosted | Free · 5.5% fee on credit purchases | — | |||
| Respan | Hosted or self-hosted (open-source Rust gateway) | Free · Team $199/month | ||||
| Portkey | Hosted or self-hosted | Free · Production from $49/month | ||||
| LiteLLM | Self-hosted | Free (open source) · Enterprise on request | ||||
| TrueFoundry | SaaS, VPC, on-prem or air-gapped | Free · Pro $25/user/month | — | |||
| Cloudflare AI Gateway | Hosted (Cloudflare) | Core features free | ||||
| Vercel AI Gateway | Hosted (Vercel) | Pay as you go · no markup | — | |||
| Requesty | Hosted (Global, EU, US and AP endpoints) | Free · 5% markup pay as you go | — | — | ||
| OrcaRouter | Hosted, with a self-hosted Lite gateway | Free · Team $499/month | — | |||
| FastRouter | Hosted (self-hosting on Enterprise) | Free · Pro $199/month · $0 markup | — | |||
| Concentrate AI | Hosted (managed) | Pay as you go · no markup | — | — |
Popular comparisons
Spro against each gateway in the directory.
vsSpro vs OpenRouter
vsSpro vs Respan
vsSpro vs Portkey
vsSpro vs LiteLLM
vsSpro vs TrueFoundry
vsSpro vs Cloudflare AI Gateway
vsSpro vs Vercel AI Gateway
vsOpenRouter vs Respan
vsOpenRouter vs Portkey
vsOpenRouter vs LiteLLM
vsOpenRouter vs TrueFoundry
vsOpenRouter vs Cloudflare AI Gateway
vsOpenRouter vs Vercel AI Gateway
vsRespan vs Portkey
vsRespan vs LiteLLM
vsRespan vs TrueFoundry
vsRespan vs Cloudflare AI Gateway
vsRespan vs Vercel AI Gateway
vsPortkey vs LiteLLM
vsPortkey vs TrueFoundry
vsPortkey vs Cloudflare AI Gateway
vsPortkey vs Vercel AI Gateway
vsLiteLLM vs TrueFoundry
vsLiteLLM vs Cloudflare AI Gateway
vsLiteLLM vs Vercel AI Gateway
vsTrueFoundry vs Cloudflare AI Gateway
vsTrueFoundry vs Vercel AI Gateway
vsCloudflare AI Gateway vs Vercel AI Gateway
Route every AI request through SPRO.
One OpenAI-compatible API for 350+ models, with intelligent routing, 29 built-in guardrails, observability, and automatic failover.