From Doubt to Data: How WhatConverts Helped Sparo Defend Results

"With WhatConverts in place, we could be very specific with clear data on the effectiveness of our marketing efforts, thereby enhancing the client's trust and understanding of their ROI."

Case Study

• Agency: Sparo Marketing
• Client: Event Space Rental
• Software: WhatConverts

When one of Sparo Marketing’s clients questioned whether paid campaigns were working, the agency didn’t rely on assumptions or anecdotes—they turned to WhatConverts. The result? Data that didn’t just defend performance. It deepened trust and unlocked smarter growth.

The Challenge: A Client Unsure If Ads Were Paying Off

As a boutique digital agency based in Miami, Sparo Marketing specializes in new customer acquisition across a mix of industries. Their hands-on approach and transparent, month-to-month retainers keep clients around, often for years.

But even long-term relationships aren’t immune to doubt.

One such client, a high-end retreat space, had become skeptical. “They weren’t sure our paid ads were working,” says Sparo founder Molly Lopez. “They felt like leads were coming from other channels, and our value was unclear.”

The client used a CRM, making it tough to align internal lead data with marketing efforts. Sparo needed a way to prove the full value of their campaigns without overhauling the client’s existing systems.

The Solution: Attribution Clarity with WhatConverts

“We were able to go line by line and show the client: this lead came from Google Ads, this one came from Facebook, and so on. It was no longer a debate. It was right there in the data.”

Sparo turned to WhatConverts to bridge the data gap and surface real, hard data on what marketing works. They used three features in particular.

1. Precise Attribution Across Channels

With WhatConverts, Sparo could see exactly where every lead came from, down to the keyword, ad variation, and campaign that brought them in.

They could see this level of attribution data on an individual lead basis:

Or zoomed out in the aggregate, opening the door to high-level insights:

As a result, Sparo knew precisely which campaigns were working, which were falling flat, and how much revenue each was bringing in.

2. Clear Lead Quality Insights

WhatConverts provided all the data Sparo needed to understand just how valuable a lead was.

• Were they a spam caller trying to sell the client something?
• Did they turn into a client or were they not the right fit?
• Who was the lead and did they match their target audience?

Sparo could easily answer those questions by zooming in on each individual lead.

They could also grab automated insights using Lead Analysis. This AI-powered insight engine reviewed calls automatically, generating a detailed call summary, picking out keywords, and spotting discussed topics.

As a result, Sparo could quickly and easily qualify leads, giving even more data on which marketing was working.

3. Detailed Customer Journeys (From Click to Conversion)

Last but not least, Sparo could use the detailed Customer Journey found in WhatConverts to better understand how leads moved from interested prospect to paying customer.

With the Customer Journey so clearly defined, Sparo could fine-tune their content to boost conversion rates and speed up their client’s sales cycle.

The Results: Measurable ROI, Renewed Trust

“It’s not just about saying we got results. It’s about showing the receipts. And WhatConverts gives us those receipts.”

With WhatConverts in place, Sparo was able to show that 70–80% of the client’s leads were driven by Sparo's paid campaigns. Even better: about half of those leads were classified as quotable, with clear dollar amounts assigned.

This new visibility also helped uncover friction in the sales process:

• Call recordings revealed missed opportunities — unanswered calls, mishandled leads, and voicemail pile-ups.
• Campaign-level tracking exposed real performance drivers, down to keywords and call types.
• Whisper messages gave context to every call, letting sales teams know if a lead came from search, social, or direct traffic before answering.

“We’ve had clients listen to their own sales calls and go, ‘This is embarrassing,’” Molly notes. “It led them to change their answering service entirely. That kind of insight is invaluable.”

Conclusion: More Than Metrics — A Trust Engine

For Sparo, WhatConverts isn’t just a reporting tool. It’s a trust engine. By making lead data visible, specific, and verifiable, the platform helps the agency justify its work, strengthen relationships, and operate as a true growth partner.

Want to see what kind of ROI you can achieve? Start your free 14-day trial of WhatConverts today!