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Published: Jan 20, 2021 License: MIT


OpenFaaS ® - Serverless Functions Made Simple

Build Status go.dev reference OpenFaaS Derek App

OpenFaaS Logo

OpenFaaS® makes it easy for developers to deploy event-driven functions and microservices to Kubernetes without repetitive, boiler-plate coding. Package your code or an existing binary in an OCI-compatible image to get a highly scalable endpoint with auto-scaling and metrics.

Twitter URL


  • Ease of use through UI portal and one-click install
  • Write services and functions in any language with Template Store or a Dockerfile
  • Build and ship your code in an OCI-compatible/Docker image
  • Portable: runs on existing hardware or public/private cloud by leveraging Kubernetes
  • CLI available with YAML format for templating and defining functions
  • Auto-scales as demand increases including to zero

Want to dig deeper into OpenFaaS?

Overview of OpenFaaS (Serverless Functions Made Simple)

Conceptual architecture

Conceptual architecture and stack, more detail available in the docs

Press / Branding / Website Sponsorship

  • Individual Sponsorships / End-users / Insiders Track 🍻

    The source code for OpenFaaS shared in public repositories on GitHub is free to use and open source under the terms of the MIT license.

    OpenFaaS Ltd offers commercial support and enterprise add-ons for end-users and training and consulting services for Cloud and Kubernetes.

    Users and contributors are encouraged to join their peers in supporting the project through GitHub Sponsors.

  • OpenFaaS PRO

    Commercial users can upgrade to OpenFaaS PRO for scale to zero, triggering functions from Kafka and for Single-Sign On with an IDp.

  • Website Sponsorship 🌎

    Companies and brands are welcome to sponsor openfaas.com, the Gold and Platinum tiers come with a homepage logo, see costs and tiers. Website sponsorships are payable by invoice.

  • Press / Branding 📸

    For information on branding, the press-kit, registered entities and sponsorship head over to the openfaas/media repo. You can also order custom SWAG or take part in the weekly Twitter contest #FaaSFriday

    Looking for statistics? This project does not use a mono-repo, but is split across several components. Use Ken Fukuyama's dashboard to gather accurate counts on contributors, stars and forks across the GitHub organisation.

    Note: any statistics you gather about the openfaas/faas repository will be invalid, the faas repo is not representative of the project's activity.


OpenFaaS ® is an independent open-source project created by Alex Ellis, which is being built and shaped by a growing community of contributors.

OpenFaaS is hosted by OpenFaaS Ltd (registration: 11076587), a company which also offers commercial services, homepage sponsorships, and support. OpenFaaS ® is a registered trademark in England and Wales.


View a selection of end-user companies who have given permission to have their logo listed at openfaas.com.

If you're using OpenFaaS please let us know on this thread. In addition, you are welcome to request to have your logo listed on the homepage. Thank you for your support.

Code samples

You can generate new functions using the faas-cli and built-in templates or use any binary for Windows or Linux in a container.

Official templates exist for many popular languages and are easily extensible with Dockerfiles.

  • Node.js (node12) example:

    "use strict"
    module.exports = async (event, context) => {
        return context
            .headers({"Content-Type": "text/html"})
                👋 Hello World 🌍


  • Python 3 example:

    import requests
    def handle(req):
        r =  requests.get(req, timeout = 1)
        return "{} => {:d}".format(req, r.status_code)


  • Golang example (golang-http)

    package function
    import (
    func Handle(req handler.Request) (handler.Response, error) {
        var err error
        return handler.Response{
            Body: []byte("Try us out today!"),
            Header: map[string][]string{
                "X-Served-By": []string{"openfaas.com"},
        }, err

Get started with OpenFaaS

Official blog and documentation

Community Subscription

OpenFaaS users can subscribe to a weekly Community Newsletter called Insiders Updates, to keep up to date with new features, bug fixes, events, tutorials and security patches. Insiders Updates are written by the project founder and distributed via GitHub Sponsors.

Support & getting help

Online training

  • New: Training course from the LinuxFoundation: Introduction to Serverless on Kubernetes

    This training course "Introduction to Serverless on Kubernetes" written by the project founder and commissioned by the LinuxFoundation provides an overview of what you need to know to build functions and operate OpenFaaS on public cloud.

    Training course: Introduction to Serverless on Kubernetes

  • Self-paced workshop written by the community on GitHub

    You may also like to try the self-paced workshop on GitHub written by the OpenFaaS community

    Browse the workshop

  • Corporate trainings

    If you wish to arrange a training session for your team, or a consultation, feel free to contact OpenFaaS Ltd



Here is a screenshot of the API gateway portal - designed for ease of use with the inception function.

Deploy OpenFaaS to Kubernetes, OpenShift, or faasd deployment guides

Video presentations

Community events and blog posts

Have you written a blog about OpenFaaS? Do you have a speaking event? Send a Pull Request to the community page below.

If you'd like to join OpenFaaS community Slack channel to chat with contributors or get some help then check out this page on community.

Roadmap and contributing

OpenFaaS is written in Golang and is MIT licensed - contributions are welcomed whether that means providing feedback, testing existing and new feature or hacking on the source.

How do I become a contributor?

Please see the guide on community & contributing


The roadmap for OpenFaaS is represented in GitHub issues and a Trello board.

Roadmap: OpenFaaS Cloud

OpenFaaS Cloud is a platform built on top of the OpenFaaS framework which enables a multi-user experience driven by GitOps. It can be installed wherever you already have OpenFaaS and packages a dashboard along with CI/CD integration with GitHub so that you can push code to a private or public Git repo and get live HTTPS endpoints.


Example of a Grafana dashboards linked to OpenFaaS showing auto-scaling live in action: here

An alternative community dashboard is available here


Path Synopsis
Package requests package provides a client SDK or library for the OpenFaaS gateway REST API
Package requests package provides a client SDK or library for the OpenFaaS gateway REST API

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