Build or Bill

Analytics and monitoring

Mentionable alternatives

2 open-source projects that already do this job. Free to use - not free to run, which is what the numbers on the right are for.

The full assessment →

The projects

langfuse/langfuse32,787licence unclearOpen-source AI engineering platform for prompt management, LLM evals, observability, and tracking.Open on GitHub openobserve/openobserve20,735AGPL-3.0Observability platform with logs, metrics, pipelines and LLM observability for analyzing model outputs and traces.Open on GitHub

What you give up either way

  • Scale and coverage across seven LLMs with maintained connectors
  • The vendor's historical dataset (e.g. +130K prompts executed/month) and aggregated market signal
  • White‑label reports, agency features and priority support
  • Production hardened MCP server with deprecation guarantees and documented tool shapes

An open-source project doing the core job proves a replacement is possible. It does not prove it matches Mentionable, and it does not prove anyone has run it for a month. How we decide.