NPPES vs Squiggle
Same instrument, two spec sheets — measured, not claimed.
NPPES vs Squiggle: common questions
Which is more reliable, NPPES or Squiggle?
On our scheduled checks, Squiggle leads on measured uptime — NPPES at —% versus Squiggle 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 NPPES and Squiggle need an API key?
Neither needs a paid key — NPPES is callable with no signup, and Squiggle is callable with no signup. Both are quick to prototype with; rate limits still apply.
Can I call NPPES and Squiggle from the browser?
Neither sends browser-friendly CORS headers reliably, so call NPPES and Squiggle from a server or proxy rather than client-side. The CORS and HTTPS rows above show exactly what we detected for each.
Are NPPES and Squiggle free for commercial use?
NPPES allows commercial use on its free tier, and Squiggle 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.