Isn't that basically HackerOne?
I've had three really bad experiences with unskilled H1 triagers that the next vuln I find from a company that uses H1 will go instantly public. I'm never going to spend that much effort again, to get a triager that would actually bother to triage.
The quality is seriously lacking. They have dismissed many valid findings.
From what I understood, the service is also (very) expensive. Wild.