OpenRouter vs Respan (2026)
Updated April 29, 2026
vs
Overview
Rating
10.0 / 10
Rating
10.0 / 10
Best For
Developers and teams who want one API for hundreds of LLMs without provider lock-in
Best For
AI engineering teams building production LLM applications who need unified access, observability, and cost control
Product Summary
OpenRouter is an LLM gateway with one OpenAI-compatible API for 500+ models from 80+ providers, billed at provider rates plus a platform fee.
Product Summary
Respan is the AI router with built-in observability and automated evals: one API for 1,000+ models, with tracing, spend control, and evals on every request.
Starting Price
$0Per forever
Starting Price
$0
Free Trial
No
Free Trial
Yes
Free Version
Yes
Free Version
Yes
Website
Website
Key features
Core capabilities each platform advertises.
- One OpenAI-compatible API for 500+ models from 80+ providers
- Auto-routing across providers
- Budgets and management API keys
- Prompt caching
- Bring your own keys, fee-free up to $25,000 a month
- One API for 1,000+ models
- Automatic fallbacks and retries
- Load balancing across providers and models
- Exact-match caching with configurable TTL
- Hard spend limits per key, per customer, or org-wide
- Task-aware model routing with Respan Router (beta)
- Tracing, evals, and prompt management on every routed request
Strengths and tradeoffs
What each tool does well, and the limitations to keep in mind.
Pros
- One key and one bill across 80+ providers
- Model calls billed at provider rates
- Free plan for prototyping on free models
- BYOK fee-free up to $25,000 of list-price inference a month
- Broadcast sends request traces to tools like Langfuse and Datadog
Cons
- Platform fee of 5.5% on Standard and 8% on Business, with a $0.80 minimum on card purchases
- Doesn't score or evaluate outputs, so quality checks happen in another tool
- Credits may be expired one year after purchase
- Free plan capped at 50 requests a day until you've bought $10 in credits
Pros
- Gateway, tracing, and evals in one platform, so every metric ties back to the request behind it
- 1,000+ models through one OpenAI-compatible API
- No processing fee on Respan credits, and provider discounts are passed straight through
- Hard spend caps that block requests, not just alert
- Unlimited seats on the free plan
- SOC 2, HIPAA with a BAA, GDPR, and ISO 27001
Cons
- Additional latency (30-40ms) 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
OpenRouter or Respan — which should you choose?
Choose OpenRouter if you wantChoose if you want
- Building model-agnostic apps that switch providers freely
- Accessing many providers with one key and one bill
- Comparing models side by side from a single API
- Tracking spend per API key
- Prototyping on free models
Choose Respan if you wantChoose if you want
- Keeping agents online through provider outages and rate limits
- Controlling LLM spend per customer or API key
- Switching models without code changes
- Scoring output quality on live production traffic
- Replacing a separate gateway, logging tool, and eval tool with one platform
Compare the models
How OpenRouter's and Respan's models score on public benchmarks, and their live API status.