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Decision guide
Monolith, Modular Monolith or Microservices? A Decision Guide
A scored framework for deciding whether to split, what to extract first, and how to do it without a big-bang rewrite.
Who it’s for
For leaders weighing a move away from a monolith. It is deliberately willing to say 'don't split yet' when that is the right answer.
What’s inside
- Eight signals that justify splitting, and six that only feel like they do
- The modular-monolith middle path and when it is enough
- A weighted decision matrix you can fill in with your team in 30 minutes
- Extraction order, a strangler plan and the pre-flight checklist
Contents
- 1. The short version
- 2. The three options
- 3. Eight signals that justify a split
- 4. The modular-monolith middle path
- 5. A weighted decision matrix
- 6. What to extract first
- 7. A strangler plan
- 8. Pre-flight checklist before the first extraction
- 9. Costs to budget for
Questions
- Is it really free?
- Yes. No payment and no sales call. You give me an email address and the PDF is yours.
- What will you do with my email?
- Send you the occasional note about similar resources and new writing. Reply “stop” and I’ll remove you.
- Can I share it with my team?
- Please do. Print it, adapt it, put it in your wiki. A link back to the site is appreciated.