Compare Stainless and Unify side by side. Both are tools in the LLM Gateways category.
Updated March 10, 2026
Choose Stainless if automates SDK dev.
Choose Unify if developer-friendly platform.
Want to compare Stainless and Unify on your own traffic?
Respan lets you trace LLM and agent calls across any model or framework, A/B test prompts on production traffic, and route requests across 250+ models through one gateway. Free tier covers 10K traces per month. Setup in 5 minutes, no credit card.
| Category | LLM Gateways | LLM Gateways |
| Pricing | paid | — |
| Best For | AI companies and developers building API clients | — |
| Website | stainlessapi.com | unify.ai |
| Key Features |
| — |
Stainless automatically generates SDKs from OpenAPI specs. Creates production-quality type-safe SDKs in multiple languages.
Unify AI provides unified interface to multiple LLM providers with routing optimization. The platform provides comprehensive features for production AI applications with focus on reliability and developer experience.
Unified API platforms and proxies that aggregate multiple LLM providers behind a single endpoint, providing model routing, fallback, caching, rate limiting, cost optimization, and access control.
Browse all LLM Gatewaystools →One platform for routing, observability, tracing, and evals across every LLM provider.