OpenFaas

OpenFaaS simplifies deploying serverless functions and existing code to Kubernetes. It provides a streamlined experience that supports any language, enabling rapid production deployments with a focus on scalability, flexibility, and ease of use.

OpenFaas is the open source alternative to:

Heroku

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About OpenFaas

OpenFaaS empowers developers to deploy functions and microservices as portable OCI images on any Kubernetes cluster. It offers robust event triggers, fine-tuned autoscaling, and a rich set of templates that follow industry best practices, paving the way for efficient, production-ready serverless architectures.

Key Features

Deploy functions and legacy code to Kubernetes with ease
Supports any programming language through pre-built and custom templates
Dynamic autoscaling and event-driven triggers, including scale-to-zero capability
Flexible deployment on-premises or in the cloud with portable OCI images
Comprehensive monitoring, RBAC, and multi-tenancy support for production use

Pricing

Community Edition (CE)

$0/Free

Designed for personal use, hobbyists, and experimentation with a 60‐day limit for commercial use.

Features:

✓15x functions
✓1x namespace
✓Legacy UI portal
✓REST API
✓Basic autoscaling (up to 5 replicas)
✓Basic metrics & observability
✓Cron trigger

OpenFaaS Standard

$1200/Production-ready

Tailored for teams or products requiring scalable, event-driven automation in production environments.

Features:

✓500x functions
✓1x namespace
✓Private function registries
✓Fine-tuned autoscaling based on RPS, CPU, and capacity
✓Enhanced event triggers including Kafka, RabbitMQ, and more
✓Grafana dashboards for monitoring
✓Custom Resource management

OpenFaaS for Enterprises

Custom

Offers tailored solutions with upgraded support and compliance features for large-scale organizations and multi-tenant hosting.

Features:

✓Up to 5000x functions per namespace
✓Unlimited namespaces
✓Enhanced multi-tenancy and isolation features
✓Direct engineering support with SLA
✓Advanced security, IAM, SSO, and RBAC integration
✓Dedicated async queues and comprehensive monitoring

Summary

OpenFaaS provides a unified serverless platform that accelerates production deployments with its extensive language support, robust autoscaling, and event-driven architecture. Its flexible deployment options and well-structured pricing tiers make it an ideal choice for developers and enterprises embracing cloud-native solutions.