Router compare
AIRouter vs Respan
Router-vs-router comparison for integration shape, routing policy, target providers, pricing model, and data handling. Use this view for the routing layer; use model compare when choosing the model itself.
Heureka Labs UG
Commercial LLM router that analyzes incoming requests and routes to the optimal model for cost/quality/latency via a drop-in OpenAI-compatible API, with a privacy-preserving embedding mode that avoids sending prompt content.
Respan (formerly Keywords AI)
Unified LLM engineering platform (gateway + observability + evals + prompt management) routing across 250+ models; previously Keywords AI, rebranded February 2026.
Facet comparison
Type
AIRouter
Router
Respan
Hybrid
Openness
AIRouter
Commercial
Respan
Commercial
Hosting
AIRouter
Hosted SaaS
Respan
Hosted SaaS
Decision mechanism
AIRouter
Classifier, Predictive learned
Respan
Rules / heuristics, Predictive learned
Optimizes for
AIRouter
Cost, Quality, Latency
Respan
Cost, Quality, Latency
Routing scope
AIRouter
Cross-provider
Respan
Cross-provider
Pricing
AIRouter
Passthrough + fee
Respan
Subscription
Data retention
AIRouter
Unknown
Respan
Opt-in logging
Models reachable
AIRouter
-
Respan
250 models
API compatibility
AIRouter
OpenAI
Respan
OpenAI