toolgrep / AI agents & frameworks / Respan
Alternatives to Respan
Respan: The AI router with built-in observability & automated evals. 8 products similar to Respan, compared on pricing, free tier, API, MCP server, SDK and open source. 8 of 8 have a free tier, 7 of 8 have an API, 6 of 8 offer an MCP server, 3 of 8 are open source.
- LangWatch
Agent observability and evals platform for tracing, testing, routing and governing LLM calls
- Langfuse
Open Source Agent Evals & Observability
- telemetry.dev
LLM observability for AI agents, built on OpenTelemetry
- Braintrust
The active observability platform for agents
- Portkey
Production stack for Gen AI builders: AI gateway, observability, guardrails, governance, and prompt management.
- REEZN
Structured, AI-assisted feature planning with human review gates, from idea to verified pull request.
- Middleware
Full-stack observability platform with an AI SRE agent
- Grafana Cloud
AI-powered, fully managed observability platform for metrics, logs, traces, and profiles
Side by side
| Product | Pricing | Free tier | API | MCP server | SDK | Open source |
|---|---|---|---|---|---|---|
| Respan | Freemium | yes | yes | yes | yes | — |
| LangWatch | Freemium | yes | yes | yes | yes | yes |
| Langfuse | Freemium | yes | yes | yes | yes | yes |
| telemetry.dev | Freemium | yes | yes | no | yes | no |
| Braintrust | Freemium · from $0 | yes | yes | yes | yes | no |
| Portkey | Freemium · from $49/month | yes | yes | yes | yes | yes |
| REEZN | Freemium · from $0 | yes | no | yes | — | no |
| Middleware | Freemium · from $0.3 per GB (pay-as-you-go); free tier with up to 100GB data | yes | yes | no | yes | no |
| Grafana Cloud | Freemium · from $0 | yes | yes | yes | — | no |
Facts come from each product's own website, or from its verified owner when they have edited the listing. Each product page shows when it was last verified and how it was extracted. Similarity comes from the products' descriptions.
API
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