OpenFaaS is a serverless functions platform written in Go that enables developers to deploy event-driven functions and microservices to Kubernetes without boilerplate code. The project allows users to package code or existing binaries in OCI-compatible Docker images to create highly scalable endpoints with automatic scaling capabilities, including the ability to scale down to zero when demand decreases. The platform supports writing functions in any language through its Template Store or custom Dockerfiles, making it accessible to developers across different programming backgrounds.
The repository serves as the core of the OpenFaaS Community Edition, which is licensed for individual exploration and hobbyist use with a 60-day limit for commercial proof-of-concepts. Commercial and production workloads require OpenFaaS Standard or OpenFaaS for Enterprises, which are maintained separately by a full-time team with dedicated support and active maintenance for security vulnerabilities and ecosystem updates. The Community Edition provides basic features compared to the commercial versions and is not licensed for commercial use beyond the initial trial period.
Key features include a user-friendly UI portal with one-click installation, a command-line interface with YAML-based templating for function definition, and portability across existing hardware and public or private cloud environments through Kubernetes integration. Functions can be triggered via HTTP endpoints or event sources such as Apache Kafka and AWS SQS. The platform includes built-in queuing and background processing capabilities for offloading tasks, and supports integration with service meshes like Istio and Linkerd.
According to GitGenius activity tracking, the repository shows a median issue and pull request response latency of 3.3 hours across sampled items, though mean latency extends to 1438.6 hours, indicating variable response times. The most active contributor tracked is alexellis with 51 events, followed by ghost with 7 events and mcgoober with 5 events. The most frequently used issue labels are proposal, question, and support. The repository overlaps with contributors from microsoft/vscode, microsoft/typescript, and rust-lang/rust, suggesting cross-project collaboration among maintainers.
OpenFaaS is classified across multiple domains including serverless, functions-as-a-service, container orchestration, event-driven architecture, cloud native development, microservices, and API gateway functionality. The platform leverages Docker and Kubernetes as core technologies and emphasizes scalability as a primary design goal. The project includes monitoring integration with Prometheus and provides Grafana dashboards for visualizing auto-scaling behavior in real-time.
The repository is governed as an independent open-source project created by Alex Ellis and shaped by a growing community of contributors. OpenFaaS Ltd, a registered company, provides commercial services, support, and maintains the trademark. The project includes comprehensive documentation, official training materials, and an eBook titled "Serverless For Everyone Else" designed to help developers understand serverless use cases through practical exercises. The platform has been featured in major conferences and has adoption among end-user companies whose logos are displayed on the official website.
