How SONTE prioritizes leads and accelerates follow-ups with Sellizer

Context

SONTE manufactures and installs intelligent liquid crystal film for windows. With one click, large glass surfaces change from transparent to milky white, providing privacy in offices, conference rooms, and homes. The brand, which started as a project among a group of friends, now operates in Poland, Europe, Asia, and the USA.

Challenge

Many proposals, multiple roles on the client side. SONTE needed clear signals to prioritize leads - to save sales reps' time and act at the best moment. Specific information was needed:

• deliverability and opens - whether materials end up in spam and are actually opened,
• reach on the client side - who views them and how many people are part of the buying committee,
• content engagement - how much time recipients spend on individual pages and which sections they return to,
• follow-up timing - when is the best time to react, to avoid making empty contacts,
• opportunity qualification - to filter out weak leads and save sales reps' time, focusing efforts on prospects with real potential.

Solution

SONTE implemented Sellizer as the standard across the entire materials delivery process:

Step 1 — Proposal.

The client receives a personalized proposal sent through Sellizer.

Step 2 — Dedicated case studies.

In the next stage, the team sends a portfolio of completed projects tailored to specific needs.

Based on proposal engagement, the team decides whether to send a product sample. If documents are not opened, sales reps quickly diagnose the cause (e.g., spam) and adjust the delivery.

Key process elements:

• SMS alerts on open - an immediate signal and trigger for contact.
• Open time and returns to document - assessment of genuine interest.
• Forwards and number of recipients - insight into the buying committee.
• No sends outside the tool - complete tracking and data in one place.
• CRM integration (Bitrix) - data consistency maintained
• Proposal expiration - a notification about an approaching deadline often triggers a request for extension/update, which is a strong buying intent signal.
  
  

This workflow ensures that SONTE reacts exactly when interest appears on the client side - and sales reps' time goes toward opportunities, not guesswork.

Results:

• Better lead qualification: sales reps focus on opportunities where there is actual reading and returns to key sections.
• More accurate follow-ups: thanks to SMS notifications, calls are made at the moment of client activity.
• Impulse for decision - the expiration notification triggers action on the client side; [43]% of proposals return to conversation within a few days.
• Full control over deliverability: quick detection of issues (e.g., spam) and delivery adjustments.
• Better decisions about sending samples: based on data about real interest, not on gut feelings.

“An SMS alert is our signal: the client is looking at the proposal — we call. Thanks to this, we close deals faster and don't distract the team with random follow-ups.”
— SONTE Team

Who is this scenario for?

• Companies running proposals/tenders that want to know what happens with a document after it's sent.
• Teams with limited resources that need precise prioritization and want to save sales reps' time.
• Organizations sending proposals + dedicated case studies that need insight into reading and engagement.
• Sample/POC-based sales where decisions should be based on hard signals of interest.