---
title: "Outsource generic subdomains"
source: "https://virtualddd.com/heuristics/outsource-generic-subdomains/"
authors: ["Nick Tune"]
tags: ["strategic design"]
type: "design heuristics"
question: "When should I build software myself, or buy it off the shelve?"
submitter: "Nick Tune"
---

# Outsource generic subdomains

## Short description

Sometimes dependencies are so generic that you don't want to invest time in it and you can either buy them off the shelf or use a SaaS functionality.

You only oursource when there is enough competition in that market

## Examples

Payment providers like stripe, paypal etc. Usermanagement, single sign-on like AWS or [oath.com](http://oath.com/)

## Context

Use these at a strategic level when defining bounded context. When you want to seperate core domains from supporting and generic subdomains