Replacing Salesforce with a custom CRM

Cost that scales with headcount rather than with value, until licenses decide who gets access.

A process that needs constant configuration work to approximate, and never quite fits.

Paying for a platform when a fraction of it is in use.

Wanting to own the system rather than rent access to it.

Migrate: accounts, contacts, opportunities, activity and email history, attachments, and the custom fields you actually use.

Rebuild rather than port: automation, validation rules and approval flows. Porting these carries years of accumulated workarounds into a clean system. The migration is the one good opportunity to drop them.

Decide deliberately: reports. Most organizations maintain far more reports than anyone reads. Rebuild the ones with an audience.

Run a full dry migration against real data first, and reconcile record counts and totals before anything goes live.

Keep Salesforce readable for a defined period after cutover. It costs a little and removes almost all of the risk.

Preserve month-over-month reporting continuity across the switch. If management cannot compare this month to last month, the migration will be remembered as a failure whatever the data quality.

Expect four to eight months end to end: discovery and mapping, build, dry migration, parallel running, then cutover.

Anyone offering a materially faster path is either scoping something smaller than a Salesforce replacement, or planning to discover the difficult parts after you have signed.