Using the power of crowd-sourcing Hackaserver helps companies improve their security by finding and reporting vulnerabilities/flaws on their servers and webapps
Index constantly checks hot and trending companies for their latest activity. We haven't gotten to this company yet, but if you follow it you'll be the the first to know when Hack a Server makes some noise.
cobalt.io
HackerOne
Synack
TapShield
Cobalt Labs
Zighra
bugcrowd
Camero
Shareagift
Quirky