Zatar - IoT Analytics
logstash - logstash is a tool for managing events and logs.
Azure Stream Analytics - Azure Stream Analytics offers real-time stream processing in the cloud.
rsyslog - Rsyslog is an enhanced syslogd supporting, among others, MySQL, PostgreSQL, failover log...
AWS IoT Analytics - IoT Management
Graylog - Graylog is an open source log management platform for collecting, indexing, and analyzing both structured and unstructured data.