AWS CloudTrail - AWS CloudTrail is a web service that records AWS API calls for your account and delivers log files to you.
Histats - Start tracking your visitors in 1 minute!
Graylog - Graylog is an open source log management platform for collecting, indexing, and analyzing both structured and unstructured data.
StatCounter - StatCounter is a simple but powerful real-time web analytics service that helps you track, analyse and understand your visitors so you can make good decisions to become more successful online.
Timber.io - Timber.io is the best logging platform for ruby, node, elixir and much more.
Woopra - Track your customers' web and mobile activity, forms, emails, support tickets and more, all in one place with customer analytics. Analyze and take action.