# fission/fission

Fast and Simple Serverless Functions for Kubernetes

Repository: https://github.com/fission/fission
Canonical: https://ross.abutalabs.com/products/fission
Homepage: https://fission.io
Language: Go
License: Apache-2.0
License Family: permissive
Topics: kubernetes, serverless, faas, serverless-functions, go, functions-as-a-service, lambda, functions, fission, docker, containers, devops, cloud-native, hacktoberfest
Last push: 2026-08-26T17:12:30+00:00

## Health v2 (maintenance only)
Score: 87/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 99, release rhythm 65, longevity 100
- inputs: {"age_days": 3666, "days_push": 7, "days_rel": 72, "gap_med": 113, "n_releases_24m": 6}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 8913, forks 793 (observed 2026-08-28T04:10:26.264798+00:00)

## What it is
Fission is an open-source, Kubernetes-native serverless framework for deploying functions as a service (FaaS). Developers write functions in languages like Python, NodeJS, Go, Ruby, PHP, or Bash, and Fission runs them on Kubernetes with event triggers (HTTP, message queues, timers) while abstracting away containers and Docker, with ~100ms cold starts via warm container pools.

## Use cases
- run lambda-like serverless functions on my own kubernetes cluster
- trigger functions from http requests or message queues
- deploy functions without building docker containers
- build an event-driven api with low cold-start latency
- self-host a functions-as-a-service platform in a private datacenter
- run scheduled serverless tasks on kubernetes
- migrate aws lambda workloads to a portable open-source platform

## When to choose
- you already run kubernetes and want a native FaaS platform
- you need low cold-start latency from warm container pools
- you want to write functions in multiple languages without managing containers
- you need a portable, self-hosted alternative to AWS Lambda
- you want declarative specs you can check into source control

## When to avoid
- you have no kubernetes cluster and want the simplest serverless option
- you need fully managed serverless with zero infrastructure to operate
- your workloads are long-running rather than short-lived functions
- you need a managed multi-cloud FaaS with vendor-backed SLAs

## Facets
- artifact type: framework
- maturity: active
- function: serverless, deployment, web-framework, workflow-automation, container-orchestration
- domain: cloud-computing, backend, microservices, self-hosted
- platform: go, cloud, self-hosted, cli
- tags: faas, serverless-functions, kubernetes-native, event-triggers, cold-start, helm, lambda-alternative, devops, containers, kubernetes, docker

## Member repositories
- fission/fission (main) score 87

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:10:26.264798+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-29T17:24:42.680497+00:00, confidence not recorded.
  - readme: https://github.com/fission/fission (fetched 2026-08-28T04:10:26.264798+00:00, sha f8da574d5914)
  - homepage: https://fission.io (fetched 2026-08-29T08:24:55.428959+00:00, sha 87d625566da1)
  - site_page: https://fission.io/docs (fetched 2026-08-29T08:24:55.726127+00:00, sha 71b1388c067f)
  - site_page: https://fission.io/docs/installation (fetched 2026-08-29T08:24:55.735670+00:00, sha 7a0403d41c41)
  - site_page: https://fission.io/docs/releases/v1.27.0 (fetched 2026-08-29T08:24:55.740065+00:00, sha a496802219d7)
- Data as of 2026-08-30T08:39:29.467469+00:00.