Juno
Best for self-hosting
Why teams pick it
Control your scheduling stack on your own infrastructure.
Open-source alternatives to Google Cloud Functions
Compare community-driven replacements for Google Cloud Functions in serverless platforms workflows. We curate active, self-hostable options with transparent licensing so you can evaluate the right fit quickly.
Google Cloud Functions
Cloud Functions executes code in response to events or HTTP requests with automatic scaling, per‑invocation pricing, and tight GCP integrations.Read more
Key stats
- 7Alternatives
- 1Support self-hosting
Run on infrastructure you control
- 6Active development
Recent commits in the last 6 months
- 5Permissive licenses
MIT, Apache, and similar licenses
Counts reflect projects currently indexed as alternatives to Google Cloud Functions.
Start with these picks
These projects match the most common migration paths for teams replacing Google Cloud Functions.
Fission
Fastest to get started
Why teams pick it
No need to write Dockerfiles for most use‑cases
All open-source alternatives
faasd
Lightweight, single-host serverless platform running on containerd, no Kubernetes
Active developmentIntegration-friendlyAI-powered workflowsGo
Why teams choose it
- Single Go binary runs as a systemd service for easy management
- Portable across x86_64 and Arm64 Linux hosts with containerd and CNI
- Supports stateful containers with persistent volumes
Watch for
Limited to a single host; no native multi‑node scaling
Migration highlight
Internal automation dashboard
Run scheduled background jobs and API endpoints on a single VM, reducing operational overhead.
OpenFunction
Run serverless workloads on any cloud with flexible autoscaling
Permissive licenseIntegration-friendlyAI-powered workflowsGo
Why teams choose it
- Cloud‑agnostic, works with any Kubernetes provider
- Pluggable architecture supporting multiple runtimes
- Built‑in sync and async function support with event source integration
Watch for
Requires Kubernetes expertise to install and operate
Migration highlight
Real‑time data processing
Functions automatically scale to handle bursty event streams with low latency
Juno
Decentralized serverless platform with zero operational complexity
Self-host friendlyActive developmentPermissive licenseTypeScript
Why teams choose it
- Isolated WASM containers per project for exclusive control and security
- Complete backend suite: auth, datastore, storage, hosting, and serverless functions
- Decentralized infrastructure with zero operational complexity
Watch for
Decentralized infrastructure may introduce unfamiliar deployment patterns
Migration highlight
Decentralized SaaS Application
Launch a multi-tenant application with authentication, database, and file storage while maintaining full control over infrastructure and user data privacy.
Fission
Kubernetes-native serverless platform for fast, language-agnostic functions
Active developmentPermissive licenseFast to deployGo
Why teams choose it
- 100 ms cold‑start latency via warm container pool
- Automatic scaling based on demand, no configuration needed
- Supports many runtimes (NodeJS, Python, Go, Ruby, PHP, Bash, any Linux executable)
Watch for
Requires a running Kubernetes cluster
Migration highlight
HTTP API endpoint
Deploy a stateless API function that scales automatically with request traffic, handling spikes without pre‑provisioned pods.
Apache OpenWhisk
Run event‑driven functions at scale with Docker and Kubernetes
Active developmentPermissive licenseFast to deployScala
Why teams choose it
- Rich programming model with actions, triggers, rules, and workflows
- Runs functions in isolated Docker containers supporting many runtimes
- Standalone Java process for quick local development
Watch for
Requires Docker and Java runtime setup
Migration highlight
API Backend with Dynamic Scaling
Deploy HTTP‑triggered actions that auto‑scale based on request volume, reducing infrastructure costs.
Fn
Run any Dockerized function anywhere with event-driven simplicity
Active developmentPermissive licenseFast to deployGo
Why teams choose it
- Native Docker support – any container can be a function
- Runs on any infrastructure – local, on‑prem, public or hybrid cloud
- Language‑agnostic – supports Go, Node, Java, Python, etc.
Watch for
Requires Docker runtime, adding container overhead
Migration highlight
API endpoint for image processing
Deploy a Go or Python function in a Docker image that scales on demand to handle image transformations
OpenFaaS
Deploy event-driven functions to Kubernetes with zero-config scaling
Active developmentFast to deployAI-powered workflowsGo
Why teams choose it
- One‑click UI installation and dashboard
- Language‑agnostic templates plus custom Dockerfile support
- Automatic scaling to zero based on request load
Watch for
Requires a Kubernetes cluster, adding operational overhead
Migration highlight
Webhook processing
Scale to zero when idle and handle traffic spikes for incoming webhooks
Choosing a serverless platforms alternative
Teams replacing Google Cloud Functions in serverless platforms workflows typically weigh self-hosting needs, integration coverage, and licensing obligations.
- 1 project let you self-host and keep customer data on infrastructure you control.
- 6 options are actively maintained with recent commits.
Tip: shortlist one hosted and one self-hosted option so stakeholders can compare trade-offs before migrating away from Google Cloud Functions.