Salesforce Flow vs Apex: When to Use Each
A practical guide to choosing between Salesforce Flow and Apex — what each does best, where the boundaries are, and how to avoid the most common mistakes.
Flow or Apex? It is one of the most common — and most mishandled — decisions in Salesforce development. Reach for code too early and you create maintenance burden; lean on Flow too hard and you hit walls. Here is a practical way to decide.
When Flow is the right call
Flow is declarative automation that admins can read and maintain. It shines when the logic is business-owned and likely to change.
- Field updates, record creation and simple branching logic
- Screen flows that guide users through a process
- Automation that admins should own and adjust over time
- Orchestrating approvals and notifications
When Apex earns its place
Apex is for the things Flow cannot do well: complex logic, bulk processing at scale, callouts and anything that needs real testing and version control.
- Complex conditional logic or heavy data processing
- Bulk operations where governor limits matter
- External callouts and integrations
- Reusable services shared across the org
A simple rule of thumb
Start with Flow. Move to Apex when the logic gets complex, performance matters, or you need to call out to another system. And whatever you choose, keep one automation per object where you can — mixing many overlapping Flows and triggers on the same object is the fastest route to bugs nobody can trace.
AgentExchange builds both — declarative automation your admins can own and tested Apex where it is genuinely needed. If your org has automation that has grown tangled, email us for a health check.