All tools
Measuring · 2 of 110 stories
Langfuse
Who uses it, and for what
One row per story. The grade is for the claim that the business uses this tool, not for its revenue.
| Story | What it does there | When | Cost stated | Grade | Source |
|---|---|---|---|---|---|
| Notis | Observability of the AI model calls. | C | Notis privacy policy, read 15 October 2026 | ||
| Kleo | Records the prompts sent to the model and what they cost. | C | Lagless Portal (note.com), 19 July 2026: Issue 86: $62k MRR in 3 months with zero ads and zero Product Hunt |
Grade A: the tool's maker or a payment processor confirms the use. Grade B: an independent report, or the tool is visible in public code. Grade C: the founder or the company says so.
Used in the same businesses
Other tools in the stories above, with the number of stories that share both.
Other tools for the same job
Measuring, with the number of stories that use each.