Should I choose Microservices or Monolithic architecture for a new mid-sized SaaS platform?

All answers to this question.

For a team of ten, a "Modular Monolith" is often the sweet spot. You get the simplicity of a single deployment pipeline and shared memory space while maintaining clear boundaries between your business logic domains. Jumping straight into Microservices introduces "distributed system tax"—you’ll spend more time managing Kubernetes clusters, API gateways, and eventual consistency issues than actually shipping features. Start with a well-structured monolith. If a specific module outgrows the rest or requires different scaling properties, you can refactor it into a standalone service later without much friction.

   Answered 2025-04-22 by Sarah Miller

Are you planning to use a managed service like AWS Lambda for certain functions, or are you strictly looking at containerized environments?

   Answered 2025-04-24 by David Thompson

• If you use Serverless/Lambda, you are effectively doing microservices without some of the infra headaches. However, cold starts can be a killer for user experience in a SaaS. If you stay containerized, stick to the monolith for now. Focus on the 'Service' layer in your code so that the logic is decoupled even if the physical deployment is unified.

     Commented 2025-04-27 by James Wilson

Scalability is a high-class problem to have. Most startups fail because they didn't ship fast enough, not because their Monolith couldn't handle the load.

   Answered 2025-04-29 by Michael Brown

• Exactly, Michael. Speed to market is king. Sarah's suggestion of a Modular Monolith allows for that speed while keeping the door open for future Microservices.

     Commented 2025-05-02 by Amanda Roberts