Architecture comparison
DevTools
GitLab.com is primarily hosted on Google Cloud Platform in the us-east1 region, with most application services running on multiple Kubernetes clusters and core datastores (PostgreSQL, Gitaly, Redis, Elasticsearch) running outside Kubernetes. Secret management uses Google KMS for GCP services and Chef Encrypted Data Bags for other host secrets.
DevTools
Linear’s CTO has described the production stack as running on Google Cloud with Kubernetes, using React and Node/TypeScript, with Postgres for primary storage, Redis for queuing, and MongoDB for caching scenarios. The only clearly documented AI-related capability in the provided sources is product-level “AI workflows”; no source here establishes a specific foundational LLM provider in the core production architecture, so model_links is empty.