Startup Security Program by Templarbit - Security practices & tools required to close large deals
pickSaaS - Hundreds of SaaS products, analyzed.
The Security Checklist - The Practical Security Checklist for Web Developers
Look at that SaaS - Inspiration and resources for SaaS founders
Google Capture the Flag 2017 - Google's 2nd annual worldwide security competition
Inside SaaS Sales - 1000+ sales emails and voicemails from top SaaS companies