S3stat
Cloudlytics
Qloudstat
Google StackDriver
S3Log
Datadog
SigNoz
Mist.io
Nessus
Qualys
Intruder
Burp Suite
Acunetix
OpenVAS
Netsparker
AlienVault USM (from AT&T Cybersecurity)
Cloudlytics - Analyze Your Amazon S3 & CloudFront Logs.
Qualys - Qualys helps your business automate the full spectrum of auditing, compliance and protection of your IT systems and web applications.
Qloudstat - Analytics & monitoring for access logs in Amazon S3, Amazon CloudFront, Google Cloud Storage and Rackspace CloudFiles (Akamai CDN)
Intruder - Intruder is a security monitoring platform for internet-facing systems.
Google StackDriver - Stackdriver provides monitoring services for cloud-powered applications.
Burp Suite - Burp Suite is an integrated platform for performing security testing of web applications.