Recently I had a discussion with a friend who’s running a small SaaS on DigitalOcean, and we debated whether it’s better to add a Load Balancer and scale out horizontally with multiple Droplets, or just upgrade a single Droplet as traffic grows.
I figured it’s a common question, so wanted to share some thoughts and see what others think too!
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For me personally, if you’re just starting out or running a low-traffic app, vertical scaling (upgrading your Droplet to one with more RAM/CPU) is the simplest and most cost-effective option.
You don’t need to worry about complexity, and you can resize your Droplet in just a few clicks:
🔗 How to Resize a Droplet
However, if you’re expecting growth, uptime is critical, or you want to handle spikes in traffic more reliably, it’s time to think about horizontal scaling with a Load Balancer and multiple Droplets. This gives you:
Redundancy (if one Droplet goes down, traffic is routed to the others)
Better performance under load
Easier rolling updates and deployments
DigitalOcean’s Load Balancer is fully managed, supports health checks, HTTPS termination, and works out of the box: 🔗 DigitalOcean Load Balancers
Also, you could consider the new Droplet Autoscale Pools for Automatic Horizontal Scaling:
🔗 How to Use Droplet Autoscale Pools for Automatic Horizontal Scaling
If you’re running containers or microservices, you might also want to look at Kubernetes or the App Platform for autoscaling:
🔗 App Platform
🔗 Kubernetes on DigitalOcean
TL;DR Start with vertical scaling for simplicity. When you need high availability or expect heavier load, introduce a Load Balancer, auto scaling group and scale out.
A good approach initially would be to Dockerize your application so it is easier later on.