Respan vs Stainless: LLM Gateways Comparison
Compare Respan and Stainless side by side. Both are tools in the LLM Gateways category.
Updated March 10, 2026
The short answer
Choose Respan if single API endpoint for 250+ LLMs eliminates vendor lock-in.
Choose Stainless if automates SDK dev.
Quick Comparison
| Category | LLM Gateways | LLM Gateways |
| Pricing | Freemium | paid |
| Best For | AI engineering teams building production LLM applications who need unified access, observability, and cost control | AI companies and developers building API clients |
| Website | respan.ai | stainlessapi.com |
| Key Features |
|
|
| Use Cases |
| — |
Pros & Cons: Respan vs Stainless
- +Single API endpoint for 250+ LLMs eliminates vendor lock-in
- +Automatic fallback ensures uptime even during provider outages
- +Real-time cost tracking and analytics across all providers
- +Built-in caching reduces redundant API costs significantly
- +Easy integration with existing codebases via OpenAI-compatible API
- −Additional latency from routing through a gateway layer
- −Newer platform with smaller community compared to established tools
- −Some advanced provider-specific features may not be fully supported
- +Automates SDK dev
- +Type-safe code
- +Multi-language
- −Requires OpenAPI
- −Limited customization
Pricing: Respan vs Stainless
- · 10,000 requests/month
- · Basic analytics
- · Community support
- · Up to 2 team members
- · 100,000 requests/month
- · Advanced analytics
- · Priority support
- · Unlimited team members
- · Unlimited requests
- · Custom SLAs
- · Dedicated support
- · SSO and RBAC
- · Core features
- · Advanced features
- · Custom
When to Choose Respan vs Stainless
- Multi-provider LLM orchestration
- LLM cost optimization and tracking
- Production monitoring and observability
About Respan
Respan is a unified AI gateway that provides a single API endpoint to access 250+ LLMs from every major provider including OpenAI, Anthropic, Google, Meta, Mistral, and dozens more. Built for engineering teams that need reliability and flexibility in their AI stack, Respan eliminates vendor lock-in by enabling seamless switching between models without code changes.
The platform provides intelligent model routing with automatic fallback strategies, ensuring AI applications stay online even when individual providers experience outages. Built-in load balancing distributes requests across providers for optimal performance, while real-time cost tracking and usage analytics help teams understand and control their AI spend. Respan's caching layer reduces redundant API calls, cutting costs by up to 70% for repeated queries.
Respan also includes rate limiting, request/response logging, and a unified dashboard for monitoring all LLM interactions across an organization. The platform supports prompt management, A/B testing between models, and semantic caching to accelerate response times. Teams can get started with a free tier and scale to enterprise plans with custom SLAs and dedicated support.
About Stainless
Stainless automatically generates SDKs from OpenAPI specs. Creates production-quality type-safe SDKs in multiple languages.
What is LLM Gateways?
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 →Other LLM Gateways Tools
More LLM Gateways Comparisons
Run LLM Gateways in production with Respan
One platform for routing, observability, tracing, and evals across every LLM provider.