Fortress vs Respan Gateway (2026)
A side-by-side comparison of Fortress and Respan Gateway on pricing, features, and fit, so you can decide which is right for you.
Quick answer
Fortress and Respan Gateway are both strong choices, but they fit different needs. Choose Fortress if you mainly need testing ai agent workflows in a safe, isolated environment before production deployment — its edge is completely free and open-source with no licensing costs. 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. Fortress starts at Free; Respan Gateway starts at around $49/month based on usage volume.
Features compared
- Sandboxed code execution environment to isolate AI agent runtime from the host system
- Integrated browser environment for agent-driven web interaction and automation
- Open-source codebase allowing full customization and self-hosting
- Designed specifically for safe deployment of autonomous AI agents
- 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 licensing costs
- Purpose-built for AI agent safety rather than a generic sandbox
- Combines code execution and browser automation in one tool
- Early-stage project with limited community documentation compared to mature alternatives
- Requires self-hosting and technical setup, which may not suit non-developer users
- 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 Fortress if
you mainly need to testing ai agent workflows in a safe, isolated environment before production deployment. Its edge: completely free and open-source with no licensing costs.
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 Fortress better than Respan Gateway?
Neither is universally better. Fortress is stronger for testing ai agent workflows in a safe, isolated environment before production deployment, with an edge in completely free and open-source with no licensing costs. 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, Fortress or Respan Gateway?
Fortress starts at Free and Respan Gateway starts at around $49/month based on usage volume. Free tier: Fortress — Fully free and open-source; Respan Gateway — Free tier available with limited requests and basic observability features.
What is Fortress best for?
Fortress is best for testing ai agent workflows in a safe, isolated environment before production deployment, building autonomous browser automation pipelines with built-in security boundaries, developing and debugging llm-powered agents without risking host system integrity.
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 Fortress and Respan Gateway have free plans?
Fortress: Fully free and 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.