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ListLoco API vs Mockaroo

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

APIListLoco APIHEALTHY100MockarooREACHABLE100
Uptime · 30d
Uptime · 90d100%100%
Uptime · 30d100%100%
P50 · ms127529
P95 · ms4432039
AuthnoneapiKey
CORSnoyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree — limits not publishedFree tier — API key required
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

ListLoco API vs Mockaroo: common questions

Which is more reliable, ListLoco API or Mockaroo?

Both are neck-and-neck — ListLoco API and Mockaroo each measure 100% uptime over 90 days on our probe schedule. Reliability here is verified from our own scheduled checks; use the 30-day bars above to see which has been steadier lately.

Which is faster, ListLoco API or Mockaroo?

ListLoco API has the lower median latency in our checks — ListLoco API responds in 127 ms versus Mockaroo at 529 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 ListLoco API and Mockaroo need an API key?

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

Can I call ListLoco API and Mockaroo from the browser?

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

Are ListLoco API and Mockaroo free for commercial use?

ListLoco API has unclear commercial terms, and Mockaroo 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.