Pulumi is an open source infrastructure as code platform that lets you define and manage cloud resources using familiar programming languages instead of DSLs. You can provision infrastructure across AWS, Azure, Google Cloud, Kubernetes, and 300+ providers with the same TypeScript, Python, Go, C#, Java, or YAML code you already know. Pulumi combines a CLI, SDKs, and an optional hosted service (Pulumi Cloud) to handle state, secrets, policy, and team collaboration for developers and platform teams.

• Real Programming Languages: Write infrastructure in TypeScript, Python, Go, C#, Java, or YAML with full IDE support, autocomplete, and type checking.
• Multi-Cloud Provider Support: Manage resources across AWS, Azure, Google Cloud, Kubernetes, and 300+ providers through a consistent API.
• Stacks and State Management: Isolate environments like dev, staging, and prod with independent state files stored locally or in Pulumi Cloud.
• Policy as Code (CrossGuard): Write security and compliance rules in code to block non-compliant infrastructure before deployment.
• Secrets Management with ESC: Encrypt config values at rest and pull secrets from Vault, AWS Secrets Manager, and Azure Key Vault through a single interface.
• Automation API: Embed Pulumi as a library in your apps to build custom CLIs, developer portals, and internal platforms.
• Testing Support: Write unit and integration tests for infrastructure code using standard testing frameworks from your chosen language.
• Pulumi Neo AI Agent: An AI agent that understands your code and policies to execute infrastructure tasks end-to-end.

• Familiar Developer Experience: Use loops, functions, classes, and packages from languages you already know instead of learning a new DSL.
• Strong Multi-Cloud Coverage: Manage AWS, Azure, GCP, and Kubernetes resources with the same tool and consistent patterns.
• Testable Infrastructure: Pulumi supports infrastructure testing with unit tests, integration tests, and ephemeral environments, making it easier for teams to validate infrastructure changes before deployment.
• Good CI/CD Integration: Works well with GitHub Actions, GitLab, Jenkins, and other pipelines, plus a Kubernetes operator for GitOps.
• Secure by Default: Encrypted secrets, no stored cloud credentials in the CLI, SOC 2 Type II certification, and full audit logs.

• Steep Learning Curve for Ops Teams: Users from infrastructure backgrounds report challenges if they don't already know a supported programming language.
• Documentation Gaps: Reviewers note that the docs can be daunting for new users and some areas need improvement.
• Smaller Community Than Terraform: The ecosystem, modules, and community resources are less extensive than the leading alternative.

• Multi-Cloud Platform Engineering: Teams managing infrastructure across AWS, Azure, and GCP use Pulumi to define reusable components once and deploy them consistently across all clouds. Snowflake used this approach to cut cluster deployment time from over a week to under a day.
• Kubernetes at Scale: Wiz uses Pulumi's Automation API to manage thousands of Kubernetes clusters across hundreds of data centers, handling hundreds of thousands of daily infrastructure updates.
• Internal Developer Platforms: Platform teams use the Automation API to build self-service portals where developers request approved infrastructure through templates and golden paths, reducing tickets and maintenance load.
• Policy and Compliance Enforcement: Enterprises use CrossGuard to encode security rules like blocking public databases or requiring FIPS endpoints, catching violations before deployment rather than in production audits.
• Migrating from Terraform: Teams frustrated with embedding logic in HCL switch to Pulumi to get real conditionals, loops, and code reuse while importing existing Terraform state.
• Ephemeral Test Environments: Development teams spin up full production-like stacks for pull request testing and tear them down after merge, using standard testing frameworks to validate infrastructure code.