Ashr vs Respan
Updated March 27, 2026
Overview
Generates synthetic multi-modal user simulations to stress-test AI agents before production, catching errors manual testing misses.
Respan provides comprehensive LLM observability with real-time monitoring, tracing, and debugging for AI applications in production. It tracks prompts, completions, latency, cost, and quality metrics across all LLM providers, with built-in evaluation tools, prompt management, and alerting. Respan gives engineering teams full visibility into their AI stack from a single dashboard.
Key features
Core capabilities each platform advertises.
- Multi-modal synthetic testing
- Voice/text/image simulations
- Pre-production agent stress testing
- Error detection
- Automated test generation
Strengths and tradeoffs
What each tool does well, and the limitations to keep in mind.
Pros
- Addresses critical gap in systematic testing for probabilistic AI agents
- Multi-modal coverage across voice, text, image, and file generation is rare
- Free tier lowers adoption barrier for teams evaluating the platform
- Prompt versioning with regression tracking is a strong developer experience feature
- Both founders have prior AI startup experience including a successful exit
Cons
- Very early stage with only 2 people — scaling support uncertain
- Paid pricing tiers not publicly disclosed
- Competes with Braintrust, Arize, and LangSmith expanding into agent testing
- SDK-only integration may limit adoption with non-technical teams
Pros
- Unified observability across all LLM providers in one dashboard
- Real-time alerting for cost spikes, latency, and quality issues
- Built-in evaluation tools for automated quality scoring
- Prompt management with versioning and A/B testing
- Easy integration with popular AI frameworks
Cons
- Newer platform building out integrations with more frameworks
- Advanced evaluation features require configuration effort
- Smaller community compared to established observability tools
Ashr or Respan — which should you choose?
Choose Ashr if you wantChoose if you want
- Agent testing
- Multi-modal QA
- Pre-deployment validation
- Edge case discovery
Choose Respan if you wantChoose if you want
Compare Ashr and Respan on your own traffic
Respan lets you trace LLM and agent calls across any model or framework, A/B test prompts on production traffic, and route requests across 500+ models through one gateway.