Hmm... I see that it's implemented differently, but aren't they accomplishing the same user task? Fundamentally, they're both solutions to the "this file is too large to email" problem. Or am I missing something?
Letscrate makes you wait for the upload to finish before you get the link. Sendoid gives you a link instantly, regardless of file size.
The free version of Letscrate limits files to 50MB and your library caps out at 200MB; the $9/month plan allows larger files and caps out at 10GB. Sendoid is free for all file sizes and imposes no caps on the size of your library.
Letscrate offers no security measures. Sendoid creates an encrypted link between sharer and receiver, and has options for password-protection and one-time usage.
Looks so to me but I think the difference is transfer speed. I tried transferring a 200 MB file and it was very quick (over the local network).
I couldn't try that with Crate (I don't have a pro account) but uploading a 25 MB file had taken 10 minutes before I gave up and decided it wasn't worth it.