Salesforce Apex, Flows, and Custom Objects: What Can Be Migrated to HubSpot?

Your Salesforce migration inventory lists contacts, accounts, opportunities, and a few custom objects. The record counts look manageable. Then someone asks about the code that calculates account value, the Flow that assigns opportunities, and the rule that prevents an incomplete deal from closing.

Those requirements can change the project substantially.

Over time, Salesforce customizations become part of how the business operates. Users may know that an approval happens or a field updates without knowing what triggers it. Moving the records alone can leave those processes behind.

A Salesforce customisation migration to HubSpot therefore needs to account for the behavior around the data. This guide explains how to assess Apex, Flows, custom objects, and other business logic before deciding what to rebuild.

Why Salesforce Customisations Need a Migration Assessment

A data export shows stored values. It does not explain every rule that created them or keeps them accurate.

An account might contain an “Active Contract Value” field that is recalculated whenever a related contract changes. Importing the current value into HubSpot preserves that number on migration day. Unless the calculation is replaced, future contract changes may leave it out of date.

The assessment needs to connect each important customization to a business requirement. Identify what starts the process, which records it reads, what it changes, and who depends on the result.

Include the less visible dependencies. A report may rely on a field populated by scheduled Apex. An integration may expect a specific status value. A validation rule may protect information that finance needs after a sale.

For each customization, agree on whether to retain the requirement, simplify it, replace it, or retire it. Give the decision an owner who can confirm the business impact.

This creates a defensible migration scope and prevents unnecessary development for processes nobody uses.

What Happens to Salesforce Apex Code?

Apex cannot be deployed directly into HubSpot. A Salesforce Apex to HubSpot project involves understanding what the code does and implementing the required behavior through an appropriate destination design.

Start by classifying the code by purpose. It may calculate values, update related records, call external services, enforce rules, or run scheduled processing. These responsibilities may need different replacements.

For example, code that sends a notification when an opportunity changes could have a straightforward automation replacement. Code that recalculates values across hundreds of related records and updates a finance platform needs a deeper technical assessment.

The review should cover timing and failure behavior as well as the successful result. Does the existing process complete before the user can save? Does it run later? What happens if the external service is unavailable?

Those differences matter. A replacement that updates a record after it has been saved may be suitable for enrichment, but it may not satisfy a requirement to prevent an invalid transaction.

Ask the implementation team to document the proposed replacement, its limitations, and its maintenance owner. “Custom code required” is not enough detail to estimate or approve the work.

Mapping Salesforce Flows to HubSpot Workflows

Salesforce Flow migration starts with the process definition rather than the visual layout.

Document the Flow’s starting conditions, decisions, record updates, related-record actions, delays, user inputs, and exception paths. Also identify other automation that runs before or after it.

A record-triggered Flow that assigns an owner and creates a follow-up task may fit a HubSpot workflow. A Screen Flow that guides a salesperson through several decisions may need a different user experience. Assess each case rather than assuming every Flow becomes one workflow.

Consider a lead assignment process. Territory may determine the default owner, but an existing company owner could take priority. Partner referrals might follow another route, while incomplete records require manual review.

The destination design needs to account for all four cases. Testing only the territory rule would leave important behavior unverified.

Review enrollment and re-enrollment carefully. A process intended to run once should not create a new task every time a record is updated. Equally, a process that must respond to later changes should not stop after its first execution.

Finally, confirm which actions are available in the proposed subscription. HubSpot’s workflow custom code actions currently require Data Hub Professional or Enterprise, so the automation design can affect the software budget.

Migrating and Rebuilding Custom Objects

Moving Salesforce custom objects to HubSpot involves two decisions: how the information should be modeled and how the records will be transferred.

A Salesforce object does not automatically need an identical custom object in HubSpot. Review what it represents, how users interact with it, and which relationships must remain available.

A business might use custom objects for subscriptions, installations, locations, or applications. Some requirements may fit standard objects. Others may justify separate custom objects.

Avoid flattening information simply to make the import easier. If one company has several subscriptions with different renewal dates, putting a single renewal date on the company record cannot represent the full relationship.

HubSpot custom objects require an eligible Enterprise subscription. Confirm the required objects, associations, and capacity against the proposed account before finalizing the architecture.

Once the design is agreed, map fields, values, owners, identifiers, and associations. Preserve source identifiers in a suitable reference field so records can be traced during reconciliation and integration updates.

Test representative relationships before loading everything. A successful import count does not prove that each subscription belongs to the correct company or that users can report on it as required.

Replacing Triggers and Complex Business Logic

Salesforce triggers and validation rules often protect requirements that users take for granted.

A trigger may update related records when an opportunity changes. A validation rule may stop a deal from closing without a contract number. Both affect the sales process, but they require different replacement decisions.

For validation, identify where the rule must apply. Records may be changed through the interface, imports, integrations, or APIs. A restriction that works during manual editing may not provide the same control across every update method.

For related-record logic, examine execution order and partial failure. If a process updates a deal, its company, and an external billing record, decide what happens when only part of that work succeeds.

Repeated events also need attention. If an integration retries an update, the replacement should avoid creating another contract or duplicate onboarding task.

These requirements should be documented as testable scenarios. For example: an incomplete deal cannot enter the approved stage through the agreed sales process, and a repeated billing event does not create a second customer record.

Where the proposed HubSpot setup cannot meet a requirement in the same way, make that difference explicit before implementation.

When to Use Integrations or Custom Code

Use the simplest approach that meets the requirement and can be maintained by the team responsible for it.

Native configuration may suit routine updates, assignments, tasks, and notifications. Custom code may be appropriate for calculations or transformations that available actions cannot handle. Middleware or an external service may be more suitable when several systems, longer-running processes, or detailed recovery controls are involved.

The decision also depends on where the business logic belongs. If the billing platform owns subscription status, HubSpot may only need to receive that status. Rebuilding the billing calculation in the CRM could create two competing versions of the same information.

Define the owner of each shared field, the direction of updates, and the response to conflicting values.

For custom development, include authentication, monitoring, retries, documentation, and support in the estimate. The initial build is only part of the responsibility.

How to Assess Technical Migration Feasibility

Begin with an inventory of active Apex, Flows, triggers, validation rules, custom objects, scheduled jobs, and connected applications. Review actual usage and dependencies with the people who maintain the system and the teams who use it.

Create a requirement record for each important process. Capture the business purpose, source behavior, proposed HubSpot approach, subscription dependency, known limitation, and acceptance test.

Prioritize the requirements that could change the migration decision. These might include strict transaction controls, complex account relationships, high-volume processing, or integrations that depend on Salesforce-specific behavior.

Build a proof of concept for uncertain requirements before committing to the full implementation. Use realistic records and test failed updates, repeated events, missing values, and permission restrictions.

The final assessment should identify what is feasible through configuration, what requires development, what will work differently, and what remains unresolved. Use those findings to finalize the scope and commercial proposal.

Conclusion

A Salesforce to HubSpot migration needs to preserve the business processes your team still depends on. That requires understanding the Apex, Flows, objects, and rules behind the records before selecting their replacements.

Assess the difficult requirements early, confirm the proposed design through testing, and document any changes in behavior. This gives your team a clearer implementation plan and a more reliable estimate.

For help assessing your current environment, explore OneMetric’s Salesforce to HubSpot migration approach