10% WhatsApp engagement at half the cost of a traditional CRM

At CONNVE we run lifecycle CRM programs for our clients. We recently hit a magic number — 10% engagement rate for one of them.

The program: new medical course registrations, sent to a highly profiled database of orthodontic specialists via WhatsApp Business API.

Key success factors

• Messages were ultra personal — we used name & scientific titles, last purchase date, overall course participation history
• Plain text, no graphics — written like a human, not a marketing blast
• Personal sales rep footer — recipients perceived it as 1:1 communication with their rep
• Results: 10% replied, 75% opened — we received overwhelmingly positive responses; clients genuinely enjoy this channel
• A/B tested send times — morning (10:00) vs afternoon (14:00). Morning wins. Peak response between 10:00–11:00. We're now building profile-level send time optimization — every recipient has their own interaction schedule
• Every reply saved to CRM — assigned as a task to the sales rep. We set up a procedure with Sales Leadership: every message gets a response, even with no immediate purchase intent. This reinforces the personal touch

Tech stack

The entire program was built outside the client's traditional execution CRM — their sending system couldn't handle this dynamic setup. We used:

• Google BigQuery as data source — Salesforce & MSSQL (ERP) data synced on 5-min incremental level via Storage Write API
• Flowgen as activation layer — send to data warehouse audience
• NATS as 12h contact lock to prevent repetitive messaging + overall distributed engine / queue / processing
• Twilio as messaging sender
• Flowgen again as webhook listener for Twilio delivery events

Why this is 2x cheaper than any execution CRM

From our experience running CRM programs, 40–50% of any traditional CRM platform spend goes to template management, list management, ETL and attribute syncing — none of which is needed when you use Flowgen + a data warehouse as your source of truth.