HubSpot & CRM Operations Consultancy
Case Study · CRM Stabilization
Stabilizing a Broken HubSpot–Salesforce Integration for a Global Nonprofit
The Situation
A global nonprofit ran Salesforce as its primary CRM and HubSpot as its marketing platform, connected through HubSpot's native Salesforce integration. A configuration change on that integration — two sync settings enabled at the same time — triggered an unintended full historical backfill: roughly 46,800 contacts flowed into HubSpot over about nine days, pushing the organization through multiple billing tiers before anyone could intervene.
By the time we were brought in, the incident had already happened. The mandate wasn't a clean greenfield build — it was to stabilize a live, partly-broken system, establish exactly what went wrong, and make sure it couldn't recur before touching anything else.
What We Diagnosed
- The backfill trigger. Two sync pathways enabled simultaneously caused the connector to pull the full historical record set rather than a controlled, going-forward sync — the direct cause of the contact spike and billing escalation.
- A structural filtering limitation. The native connector can't be gated from the HubSpot side; inbound filtering is only possible on the Salesforce side. That single fact reframed how every future data addition had to be handled.
- Data hygiene debt. Roughly 2,000 contacts carried an estimated 1,000 potential duplicate reductions — a meaningful cleanup, but one that had to be sequenced carefully against the live sync.
- Email authentication gaps affecting deliverability, and a missing analytics tracking script (the forms script was present, but the script that captures page views and attribution was not).
- Over-complex lifecycle configuration that didn't reflect how the organization actually operated.
The Decisions That Mattered
In a stabilization engagement, the value lies as much in the work deliberately not performed as in the work delivered. The key judgment calls:
Controlled import over re-enabling the syncFor adding account data, we chose a managed import instead of switching the object sync back on — specifically to avoid reintroducing the exact backfill risk that caused the incident.
A Salesforce-first merge sequence for deduplicationRecords living in both systems must be merged in the correct order; merging in HubSpot first orphans the Salesforce record and silently breaks the sync. We defined the sequence before scheduling any merges.
Lifecycle simplificationWe collapsed the lifecycle model to three clear stages aligned to how the organization thinks about its audience, removing configuration that created noise without insight.
Stabilize first, build secondWe resisted the pull to start building automations until the foundation was verified safe — protecting the client from compounding a fragile setup with new complexity.
The Roadmap
1
Stabilize & ProtectIn ProgressFull audit, root-cause analysis, risk containment, and a documented strategy for data, lifecycle, and integration handling.
2
StandardizeMarketing automation, tracking standardization, lifecycle design, and reporting foundations.
3
Execute & GovernWorkflow builds, duplicate cleanup execution, and ongoing governance to keep the system healthy.
Where This Stands
This is an active engagement, and we're sharing the approach rather than final metrics by design — the measurable outcomes land as the later phases execute. What's already true: the immediate risk is contained, the root cause is understood and documented, and the client has a clear, de-risked path forward instead of an integration they're afraid to touch.
Results to be added as Phases 2–3 complete: % duplicate contacts resolved, deliverability and authentication improvements, and billing-tier normalization.
Where are your own systems leaking?
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