Launch Library 2 vs TLE
Same instrument, two spec sheets — measured, not claimed.
Launch Library 2 vs TLE: common questions
Which is more reliable, Launch Library 2 or TLE?
On our scheduled checks, TLE leads on measured uptime — Launch Library 2 at —% versus TLE 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 Launch Library 2 and TLE need an API key?
Neither needs a paid key — Launch Library 2 is callable with no signup, and TLE is callable with no signup. Both are quick to prototype with; rate limits still apply.
Can I call Launch Library 2 and TLE from the browser?
Yes — both Launch Library 2 and TLE send CORS headers over HTTPS, so front-end code can fetch either directly with no backend proxy. That makes them easy to swap in a client-side app while you compare responses.
Are Launch Library 2 and TLE free for commercial use?
Launch Library 2 has unclear commercial terms, and TLE 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.