Apache OpenWhisk vs Spring Cloud Function

Apache OpenWhisk8.8Visit SFSpring Cloud Function8.7Visit

Higher score Apache OpenWhisk #3 in Serverless Development Frameworks 8.8/10 Open source ✓ 0 of 4 features Try Apache OpenWhisk

vs

SF Spring Cloud Function #4 in Serverless Development Frameworks 8.7/10 Free plan Free plan✓ 2 of 4 features Visit site

• Apache OpenWhisk fits best

  Teams building portable event-driven functions

• Spring Cloud Function fits best

  Java teams targeting several cloud function providers

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Side by side

Feature	Apache OpenWhisk 8.8/10 Visit ↗	SFSpring Cloud Function 8.7/10 Visit ↗
At a glance
Editor score	8.8	8.7
Ranking	#3 in Serverless Development Frameworks	#4 in Serverless Development Frameworks
Best for	Teams building portable event-driven functions	Java teams targeting several cloud function providers
Pricing model	Free	Free
Starting price	Open source	Free plan
Free plan	Not checked yet	✓ (best)
Free trial	—	—
Deployment	Desktop, Self-hosted	Cloud, Self-hosted
Platforms	Linux, macOS, Windows	Web
Integrations	7 integrations	5 integrations
Features Apache OpenWhisk 0/4 · Spring Cloud Function 2/4
Local testing	Not checked yet	✓ (best)
Application packaging	Not checked yet	✓ (best)
Kubernetes support	Not checked yet	—
Deployment rollback	Not checked yet	—
Specs
Deployment targets	Not checked yet	Multi_cloud
Supported languages	Not checked yet	Java
Deployment model	Not checked yet	Cloud_functions
Our review
Pros	Supports triggers, rules, feeds, sequences, and synchronous or asynchronous actions Offers multiple language runtimes plus custom Docker runtimes Deploys locally or on Kubernetes and includes REST API access	Adapters target AWS Lambda, Azure Functions, and Google Cloud Functions Supports imperative, reactive, and hybrid programming styles Includes function composition, packaging, and local testing workflows
Cons	Requires a self-managed deployment rather than a vendor-hosted paid service Management and deployment workflows center on the CLI and YAML manifests The published product details give limited development and deployment workflow guidance	Centers on a programming model, not end-to-end infrastructure deployment No documented Kubernetes deployment capability No documented deployment rollback capability
Our verdict	Apache OpenWhisk is an open-source, distributed serverless platform for running functions in response to events or HTTP requests. Its model combines actions with triggers, rules, feeds, packages, and sequences, making it a fit for teams… Read the review →	Spring Cloud Function is an open-source framework for implementing business logic as functions with the Spring programming model. It suits Java teams that want to keep function code separate from a specific runtime target and run it as a… Read the review →

Strengths and trade-offs

• Apache OpenWhisk — where it wins

  • Supports triggers, rules, feeds, sequences, and synchronous or asynchronous actions
  • Offers multiple language runtimes plus custom Docker runtimes
  • Deploys locally or on Kubernetes and includes REST API access

  Where it doesn't

  • Requires a self-managed deployment rather than a vendor-hosted paid service
  • Management and deployment workflows center on the CLI and YAML manifests
  • The published product details give limited development and deployment workflow guidance

• Spring Cloud Function — where it wins

  • Adapters target AWS Lambda, Azure Functions, and Google Cloud Functions
  • Supports imperative, reactive, and hybrid programming styles
  • Includes function composition, packaging, and local testing workflows

  Where it doesn't

  • Centers on a programming model, not end-to-end infrastructure deployment
  • No documented Kubernetes deployment capability
  • No documented deployment rollback capability

• Apache OpenWhisk8.8/10 · Open source

  A portable, self-managed framework for event-driven functions, with Kubernetes and Docker support.

  Try Apache OpenWhiskFull verdict →
• SFSpring Cloud Function8.7/10 · Free plan

  An open-source Spring programming model for packaging and adapting Java functions across clouds.

  Visit siteFull verdict →