OpenFaaS

Name: OpenFaaS
Brand: OpenFaaS

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Serverless functions on Kubernetes

Cloud & Infrastructure Hosting & Deployment Serverless

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Tracked since2025

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The Bottom Line

Entry price

Free, no paid tier

Biggest pro

Open source serverless

Biggest con

Learning curve

TL;DR - OpenFaaS

OpenFaaS is an open-source serverless framework for Docker and Kubernetes
It deploys functions as containers with auto-scaling and metrics
Free and open-source, Pro support available

Pricing: Free forever

Best for: Individuals & startups

What is OpenFaaS?

Editorial review

OpenFaaS makes serverless functions portable. Functions on any infrastructure-serverless that doesn't lock you into clouds. The portability is the point. The Kubernetes integration works. The community supports it. Teams wanting portable serverless consider OpenFaaS for infrastructure-agnostic functions.

Available on: Web

LCLouis CorneloupUpdated May 26, 2026 · how we evaluateSourceopenfaas.com ↗

Pros & Cons

Pros

Open source serverless
Kubernetes native
Self-hostable
Good community
Language agnostic

Cons

Learning curve
Setup complexity
Enterprise features paid
Documentation gaps
Operational overhead

Key Features

Serverless functionsKubernetesDocker SwarmAny languageAuto-scalingOpen source

Pricing Plans

Pricing checked Sep 4, 2026

Community Edition

Free

Open source
Self-hosted
Basic features
Community support

OpenFaaS Pro

Custom

Enterprise features
Scale-to-zero
Event connectors
Priority support

Calculate your cost View full pricing

Is OpenFaaS worth the price?

85/100

OpenFaaS offers a very generous pricing model with its free Community Edition, making it highly accessible for individual developers and small teams.

The 'Custom' pricing for OpenFaaS Pro, while lacking transparency, is standard for enterprise-grade serverless solutions. This structure is best for users who want to start with a powerful open-source solution and scale to enterprise needs with dedicated support.

Hidden Costs & Gotchas

OpenFaaS Pro pricing is not public, requiring direct contact.

Community Edition lacks priority support for critical issues.

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Best OpenFaaS Alternatives

Top alternatives based on features, pricing, and user needs.

Azure FunctionsPaid

Serverless compute for event-driven applications on Azure

4.5

AWS LambdaPaid

Run code without managing servers, pay only for compute time

4.6

KnativeFree

Serverless containers on Kubernetes

4.3

Google Cloud FunctionsFreemium

Serverless compute on Google Cloud

3.2

See all cloud & infrastructure tools →

Still deciding?

Most buyers shortlist 2 or 3 tools before committing. Pull a side-by-side comparison or browse the full alternatives shortlist below.

OpenFaaS vs Azure FunctionsHead-to-head: features, pricing, who wins OpenFaaS vs AWS LambdaHead-to-head: features, pricing, who wins OpenFaaS vs KnativeHead-to-head: features, pricing, who wins

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OpenFaaS FAQ

How does OpenFaaS enable portable serverless functions?

OpenFaaS makes serverless functions portable by integrating with Kubernetes, allowing functions to run on any infrastructure. This approach ensures that users are not locked into specific cloud providers for their serverless deployments.

Which teams would benefit most from using OpenFaaS?

Teams that prioritize infrastructure-agnostic functions and desire portability for their serverless deployments are well-suited for OpenFaaS. It is particularly useful for those already utilizing or planning to use Kubernetes for their infrastructure.

How does OpenFaaS compare to Knative for serverless deployments?

OpenFaaS provides serverless functions on Kubernetes with a focus on portability and self-hosting, similar to Knative. However, OpenFaaS emphasizes its open-source nature and strong community support for its Kubernetes-native approach.

What kind of operational trade-offs should users expect with OpenFaaS?

Users should be prepared for a learning curve and some setup complexity when adopting OpenFaaS. There can also be operational overhead due to its self-hostable and Kubernetes-native architecture, and some enterprise features require a paid plan.

Does OpenFaaS support functions written in various programming languages?

Yes, OpenFaaS is designed to be language agnostic, meaning it supports serverless functions developed in a wide range of programming languages. This flexibility allows teams to use their preferred languages for function development.

How is OpenFaaS priced?

OpenFaaS is free to use, as no paid plan is required to utilize its core serverless function capabilities on Kubernetes. However, certain advanced enterprise features may be part of a paid offering.

Source: openfaas.com

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