Migrated from Zoho to HubSpot - what broke in the first 30 days

Alright, let's cut through the usual parade of "seamless migration" case studies and "elevated customer journeys" we're constantly fed. Our procurement team just finished a mandated 30-day observation period after moving off Zoho CRM and onto HubSpot's Sales Hub Enterprise. The business case was built on "superior integration" and "modern automation," and of course, the promise of a shiny new UI.

I was tasked with leading the post-migration audit, and let me tell you, the list of what broke, degraded, or simply vanished is far more instructive than any vendor's pre-sales demo. For all the talk of data portability, these platforms are built on fundamentally different architectures and philosophies. The migration tools handle the obvious 80%, but it's the 20%—often your most nuanced, business-critical processes—that gets left in the ditch.

Here’s a non-exhaustive breakdown of our casualties, organized by the kind of pain they caused:

* **Historical Data Context Became Unusable:** Our Zoho "Activities" (calls, emails, meetings) were technically migrated into HubSpot's "Notes" and "Tasks." However:
* The associative logic broke. In Zoho, an email sent from a deal record was intrinsically linked to that deal's timeline. In HubSpot, these imported activities often appear as orphaned timeline entries, detached from the specific deal or company record they belonged to, making historical audit trails useless.
* Custom activity types we'd created for compliance logging (like "Contract Review Call") were flattened into generic "Task" entries, stripping all meaningful categorization.

* **Process Automation That Just Stopped Working:** Our Zoho workflows, which handled lead triage based on a complex scoring model using both form data and page visit behavior, cannot be directly replicated. HubSpot's workflow tool is powerful but thinks differently.
* The migration converted our active Zoho workflows into a static PDF document for "reference." We are now rebuilding them from scratch, and the first-week lead routing failure rate was approximately 40% because our scoring thresholds didn't map 1:1.
* Zoho's "blueprint" functionality for enforcing stage-gate criteria in our sales process does not have a direct counterpart. Our sales reps immediately reported they could skip required fields in HubSpot that were hard-enforced in Zoho, creating data quality issues immediately.

* **The Silent Degradation of Custom Fields and Dependencies:** This is a classic vendor-lockin trap. We had several calculated fields in Zoho that pulled data from related modules (e.g., a "Total Open Deal Value" on the Account record). The migration brought over the *field* and the *current value*, but not the *calculation logic*. That data is now stale and will remain so until we rebuild the calculations in HubSpot, which may require a higher-tier subscription for certain API calls.
* Multi-select picklist values migrated, but the dependencies between picklists (e.g., selecting "Manufacturing" in Industry reveals a specific subset of options in "Sub-Industry") did not. Our data import looks correct, but any new data entry is prone to errors until we manually rebuild these rules.

* **API Integration Hangover:** Our internal project management tool was integrated with Zoho via API. The HubSpot migration service did not touch this. We now have a two-week project to rebuild the integration from the ground up using HubSpot's API, which has different rate limits, authentication methods, and webhook payload structures. During this period, deal updates are not syncing, creating a manual reconciliation nightmare.

The overarching theme isn't that HubSpot is "worse" than Zoho. It's that they are different kingdoms, and a migration is not a lift-and-shift but a painful, detail-oriented reconstruction. The sales pitch focused on all the new things we could do, but was conspicuously silent on all the mature, nuanced things we already did that would cease to function. The cost of migration is never just the license delta; it's the hundreds of hours of technical debt payment and process re-engineering that the vendor has no incentive to quantify.

I'm curious if others have faced similar "functional atrophy" during CRM migrations. What specific Zoho-to-HubSpot pain points did you encounter that weren't covered in the implementation playbook? More broadly, how do you pressure vendors to provide a genuine "gap analysis" that goes beyond feature checkboxes and actually maps your existing business logic onto their platform?