Architecture comparison
DevTools
Jira/Confluence migrated to an AWS-native multi-tenant platform (Micros) on PostgreSQL + DynamoDB. Atlassian Intelligence wraps OpenAI behind a tenancy/governance layer.
DevTools
GitHub runs on a large-scale, multi-service production platform hosted on Microsoft Azure, with operational patterns documented by GitHub/Microsoft materials and independent technical writeups. The data layer is commonly described as MySQL at scale with Vitess plus Redis and Elasticsearch, while GitHub also publishes substantial open-source infrastructure and developer tooling.