Data Architecture Redesign for a SaaS Platform — Single Source of Truth Across 6 Systems

"We stopped arguing about data and started making decisions. That sounds simple but it took three years and the right architecture partner to get there."

— Chief Operating Officer, B2B SaaS Platform (2,200 customers)

We had six systems that all thought they were the source of truth for customer data. HubSpot had the commercial history. Stripe had the billing data. Our product database had usage data. Intercom had support conversations. Nobody had the full picture and the weekly revenue call always started with fifteen minutes of arguing about whose numbers were right.

Each system held a piece of the customer picture with no reliable way to connect them. Customer health scores were guesswork because product usage and commercial data could not be joined. Churn was often detected only after cancellation because the warning signals in product data never reached the commercial team.

We mapped every customer data point across all six systems and classified it by who owned it commercially, who needed to read it, and what the authoritative source should be. This produced a clear data ownership model: HubSpot as the commercial master, Stripe as the billing master, and the product database as the usage master — with integrations flowing downstream.

We designed and built a data architecture using HubSpot as the customer master, with bidirectional integrations to Stripe for billing events and the product database for usage signals. A customer health score combining commercial, billing, and usage data was built in HubSpot. Automated alerts flagged churn risk signals before they became cancellations.

Revenue reporting time reduced from one week to four hours. Churn rate decreased by 18% in the first year as the commercial team began acting on product usage signals. Monthly revenue accuracy improved to 99.2% as billing and CRM data were reconciled in real time.

Is this familiar?

HubSpot challenges in SaaS & Technology — what we see most often

B2B SaaS companies almost always reach a point where customer data is too spread across systems to manage effectively. HubSpot holds commercial data. Stripe holds billing data. The product database holds usage data. Intercom or Zendesk holds support history. None of these systems talk to each other reliably.

The result is a revenue team that cannot answer basic questions about customer health, a CS team that discovers churn risk too late, and a monthly reporting process that consumes a week of senior time reconciling conflicting numbers.

Celumai designs customer data architectures for SaaS businesses that define clear ownership, authoritative sources, and real-time integration between commercial and operational systems.