AlertLogic

AlertLogic provides cloud security and compliance solutions for public, private, and hybrid cloud environments.

Papertrail

Papertrail is a cloud-based log management and analysis platform that enables you to quickly search, filter and analyze logs.

Loggly

Log management service for combining log data.

Graylog

Log management and analysis tool that uses Elasticsearch, MongoDB, and other open source tools.

Datadog

Log and metric management service that works across major cloud providers.