ProbegradeComparison
Probegrade vs. directories that sell placement
A comparison against a category of products, based on how they commonly work. It does not describe any specific company.
| Probegrade | Directories that sell placement | |
|---|---|---|
| How sources are ranked | Automated probe measurements | Often by payment, popularity or editorial picks |
| Effect of paying | None on scores; sponsored slots are labeled and separate | Paid listings can appear above unpaid ones |
| What's measured | Uptime, latency, schema validity, freshness, price | Usually nothing measured continuously |
| Audit trail | Hash-chained probe archive per edition | Rarely published |
| Payments for agents | x402 gateway, billed per call | Typically not offered |
Agent-readable: Markdown · JSON · llms.txt · Updated 2026-10-17