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GrünstromIndex vs Solematica

Same instrument, two spec sheets — measured, not claimed.

APIGrünstromIndexNEW—SolematicaNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
Authnonenone
CORSyesno
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree under fair-use policyFree public /providers endpoint; other endpoints need paid credits
Rate limitFair-use (paid tiers for higher limits)100 req/window · 99 remaining · resets 900
In directory since2026-07-052026-07-05
operationalpartialdownno data

GrünstromIndex vs Solematica: common questions

Which is more reliable, GrünstromIndex or Solematica?

On our scheduled checks, Solematica leads on measured uptime — GrünstromIndex at —% versus Solematica at —% over 90 days. These are our own probe results, not provider claims; the uptime bars above show the day-by-day record for both.

Do GrünstromIndex and Solematica need an API key?

Neither needs a paid key — GrünstromIndex is callable with no signup, and Solematica is callable with no signup. Both are quick to prototype with; rate limits still apply.

Can I call GrünstromIndex and Solematica from the browser?

Only GrünstromIndex is browser-friendly — it returns CORS headers over HTTPS. Solematica needs a server-side call or proxy, so factor that into which one fits a front-end project.

Are GrünstromIndex and Solematica free for commercial use?

GrünstromIndex has unclear commercial terms, and Solematica has unclear commercial terms. We track service terms and the data license as separate fields — see the Commercial use and Data license rows above, and confirm both before shipping either in a paid product.