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QuickChart vs Todoist

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

APIQuickChartNEW—TodoistNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
AuthnoneapiKey
CORSnono
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree — limits not publishedFree tier — API key required
Rate limitUnpublishedRetry-After: 2s
In directory since2026-07-052026-07-05
operationalpartialdownno data

QuickChart vs Todoist: common questions

Which is more reliable, QuickChart or Todoist?

On our scheduled checks, Todoist leads on measured uptime — QuickChart at —% versus Todoist 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 QuickChart and Todoist need an API key?

QuickChart needs no key, while Todoist requires a free API key. If you want to start calling without signup, reach for QuickChart first.

Can I call QuickChart and Todoist from the browser?

Neither sends browser-friendly CORS headers reliably, so call QuickChart and Todoist from a server or proxy rather than client-side. The CORS and HTTPS rows above show exactly what we detected for each.

Are QuickChart and Todoist free for commercial use?

QuickChart has unclear commercial terms, and Todoist 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.