Halo vs Respan Gateway (2026)
A side-by-side comparison of Halo and Respan Gateway on pricing, features, and fit, so you can decide which is right for you.
Quick answer
Halo and Respan Gateway are both strong choices, but they fit different needs. Choose Halo if you mainly need debugging unexpected or incorrect llm outputs during development — its edge is completely free and open-source with no usage limits. Choose Respan Gateway if you need managing multi-provider llm traffic for production ai applications — its edge is combines routing, observability, and evals in a single platform reducing tool sprawl. Halo starts at Free; Respan Gateway starts at around $49/month based on usage volume.
Features compared
- Automatic logging of LLM requests and responses
- Structured observability data for debugging and auditing
- Self-hosted deployment for full data privacy control
- Lightweight integration with existing LLM application pipelines
- Unified LLM routing across multiple AI providers with a single API endpoint
- Built-in observability including request tracing, latency monitoring, and logging
- Automated evaluations to benchmark and compare model outputs at scale
- Fallback and retry logic to handle provider outages and reduce downtime
Pros & cons
- Completely free and open-source with no usage limits
- Self-hosted architecture keeps sensitive prompt data private
- Easy to integrate into existing LLM-based applications
- Lacks a managed cloud option for teams without DevOps resources
- Feature set is minimal compared to commercial LLM observability platforms
- Combines routing, observability, and evals in a single platform reducing tool sprawl
- Provider-agnostic design makes it easy to swap or mix LLM providers
- Saves engineering time by replacing custom middleware with ready-built infrastructure
- Relatively new platform so documentation and community resources are still maturing
- Advanced evaluation customization may require technical setup not suited for non-developers
The verdict
Choose Halo if
you mainly need to debugging unexpected or incorrect llm outputs during development. Its edge: completely free and open-source with no usage limits.
Choose Respan Gateway if
you mainly need to managing multi-provider llm traffic for production ai applications. Its edge: combines routing, observability, and evals in a single platform reducing tool sprawl.
Frequently asked questions
Is Halo better than Respan Gateway?
Neither is universally better. Halo is stronger for debugging unexpected or incorrect llm outputs during development, with an edge in completely free and open-source with no usage limits. Respan Gateway is stronger for managing multi-provider llm traffic for production ai applications, with an edge in combines routing, observability, and evals in a single platform reducing tool sprawl. Pick based on your main task.
Which is cheaper, Halo or Respan Gateway?
Halo starts at Free and Respan Gateway starts at around $49/month based on usage volume. Free tier: Halo — Fully free, open-source; Respan Gateway — Free tier available with limited requests and basic observability features.
What is Halo best for?
Halo is best for debugging unexpected or incorrect llm outputs during development, auditing prompt and response history for compliance or qa purposes, monitoring api latency and usage patterns across llm calls.
What is Respan Gateway best for?
Respan Gateway is best for managing multi-provider llm traffic for production ai applications, running automated evals to compare model quality across openai and anthropic, monitoring api costs and latency to optimize ai infrastructure spending.
Do Halo and Respan Gateway have free plans?
Halo: Fully free, open-source. Respan Gateway: Free tier available with limited requests and basic observability features. Check each tool's pricing page for current limits, as plans change.