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Kroki vs TotalShiftLeft Sandbox

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

APIKrokiHEALTHY94TotalShiftLeft SandboxHEALTHY93
Uptime · 30d
Uptime · 90d100%98.9%
Uptime · 30d100%98.3%
P50 · ms341468
P95 · ms31831171
Authnonenone
CORSyesno
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree — limits not publishedFree — open sandbox, auth optional
Rate limitUnpublished100 req/window · 99 remaining · resets 60
In directory since2026-07-052026-07-05
operationalpartialdownno data

Kroki vs TotalShiftLeft Sandbox: common questions

Which is more reliable, Kroki or TotalShiftLeft Sandbox?

On our scheduled checks, Kroki leads on measured uptime — Kroki at 100% versus TotalShiftLeft Sandbox at 98.9% over 90 days. These are our own probe results, not provider claims; the uptime bars above show the day-by-day record for both.

Which is faster, Kroki or TotalShiftLeft Sandbox?

Kroki has the lower median latency in our checks — Kroki responds in 341 ms versus TotalShiftLeft Sandbox at 468 ms (P50). Tail latency (P95) is in the table above; for most workloads the median is the number that shapes how the API feels.

Do Kroki and TotalShiftLeft Sandbox need an API key?

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

Can I call Kroki and TotalShiftLeft Sandbox from the browser?

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

Are Kroki and TotalShiftLeft Sandbox free for commercial use?

Kroki has unclear commercial terms, and TotalShiftLeft Sandbox 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.