Flow or Apex? When Salesforce automation needs code

Record-triggered logic on a single object: updating fields, creating related records, sending emails and notifications, posting to Chatter.

Guided screens for users: wizards, data entry with validation, approval requests.

Scheduled jobs with simple logic: nightly updates, reminders, status changes.

Orchestration of existing pieces: calling invocable actions, subflows and simple external services.

Flow is visible to admins, changes fast and needs no deployment pipeline for small tweaks. When the logic fits in one readable canvas, Flow is the right answer.

Complex logic: nested conditions, loops inside loops, many objects touched in one transaction. The canvas becomes unreadable and untestable.

Large data volumes: Flow has its own limits and is harder to bulkify correctly; batch processing of hundreds of thousands of records belongs in Apex.

Order of execution: when several flows and triggers fire on the same object, debugging becomes guesswork. A single trigger handler with an explicit order is easier to reason about.

Error handling and retries: fault paths exist, but sophisticated retry logic, logging and partial rollbacks are far cleaner in code.

Reuse and testing: Flow has no unit tests. Apex does, and Salesforce enforces 75 percent coverage for a reason.

Business logic that must be reliable, tested and versioned: pricing engines, allocation rules, complex validations across objects.

Integrations with external systems that need authentication, retries, pagination or payload transformation.

High-volume batch and asynchronous processing.

Custom user interfaces with Lightning Web Components that need server-side logic.

Anything an admin should not be able to change by accident.

If the automation can be explained in one sentence and touches one object, use Flow. If it needs a diagram to explain, involves several objects or an external system, or must be tested, use Apex, and keep Flow as the thin layer that calls it. Mixing the two well is a skill: keep triggers in one framework, keep flows small, and document which one owns each object.

Describe the automation you have in mind and we will tell you, within 24 business hours, whether it is a Flow, an Apex job, or a bit of both, with a fixed-price quote for either.