Best On-Premises Function as a Service (FaaS) Providers of 2025

Oracle Cloud Infrastructure (OCI) Functions provides a serverless computing platform that allows developers to design, execute, and scale applications without the burden of managing the underlying infrastructure. This service is based on the open-source Fn Project and accommodates various programming languages such as Python, Go, Java, Node.js, and C#, which facilitates versatile function development. Developers can easily deploy their code, as OCI takes care of the automatic provisioning and scaling of resources needed for execution. Additionally, it features provisioned concurrency, which guarantees that functions are ready to handle requests with minimal delay. A rich catalog of prebuilt functions is offered, allowing users to quickly implement standard tasks without starting from scratch. Functions are bundled as Docker images, and experienced developers have the option to create custom runtime environments using Dockerfiles. Furthermore, integration with Oracle Identity and Access Management allows for precise control over access permissions, while OCI Vault ensures that sensitive configuration data is stored securely. Overall, this combination of features makes OCI Functions a powerful tool for modern application development.

OpenFaaS® simplifies the deployment of serverless functions and existing applications onto Kubernetes, allowing users to utilize Docker to prevent vendor lock-in. This platform is versatile, enabling operation on any public or private cloud while supporting the development of microservices and functions in a variety of programming languages, including legacy code and binaries. It offers automatic scaling in response to demand or can scale down to zero when not in use. Users have the flexibility to work on their laptops, utilize on-premises hardware, or set up a cloud cluster. With Kubernetes handling the complexities, you can create a scalable and fault-tolerant, event-driven serverless architecture for your software projects. OpenFaaS allows you to start experimenting within just 60 seconds and to write and deploy your initial Python function in approximately 10 to 15 minutes. Following that, the OpenFaaS workshop provides a comprehensive series of self-paced labs that equip you with essential skills and knowledge about functions and their applications. Additionally, the platform fosters an ecosystem that encourages sharing, reusing, and collaborating on functions, while also minimizing boilerplate code through a template store that simplifies coding. This collaborative environment not only enhances productivity but also enriches the overall development experience.