Customer story
Growth Labz
How Growth Labz turned messy lead lists into campaign-ready pipelines with 80% less cleanup time.
Lead Generation · 6 employees · Amsterdam & Sydney
Growth Labz is a B2B lead generation agency helping companies book qualified meetings through cold email and outbound systems.
Industry
Lead Generation
Company size
6 employees
Headquarters
Amsterdam · Sydney
Founded
2021
Features
Email enrichment
List verification
Bulk export
Challenge
Growth Labz handled 15K, 25K leads per month, but only 50 to 60% had usable email addresses. Bounce rates were climbing and campaign performance suffered while the team manually cleaned data instead of launching outbound.
Solution
Scalelist became their dedicated email enrichment and verification layer, turning raw lists into verified, high-confidence prospects ready for outreach.
Results
25K
Leads enriched per month
20K
Verified emails per month
~80%
Less time on list cleanup
2×
More campaigns launched
Background
Built to make outbound work, at any scale.
Growth Labz was founded with a simple mission: help B2B companies book qualified meetings through cold email and outbound systems that actually perform. From a small distributed team across Amsterdam and Sydney, the agency has grown into a trusted partner for clients who need predictable pipeline, not just more lists.
Their service combines outbound strategy, copy, infrastructure, and list-building into a single managed engine. Most clients come to Growth Labz after burning out on tools that promised volume but delivered noise, so the bar for data quality is non-negotiable.
Arin Ohandjanian, Director EMEA, leads the European operation and oversees the systems that keep campaigns running cleanly across hundreds of inboxes every month.
Arin Ohandjanian. Director EMEA, Growth Labz
The problem
Manual, brittle, and increasingly unsustainable.
Before Scalelist, Growth Labz was pulling lead data from multiple sources, scrapers, exports, partner lists, and stitching it together by hand. The volume was real (15K, 25K leads per month), but the quality was not. Roughly half of every list was unusable.
They tried the obvious players. Apollo for sourcing, NeverBounce and ZeroBounce for verification, plus a rotating cast of enrichment tools layered on top. Each closed one gap and opened two more. Costs stacked up. Workflows fragmented. And bounce rates kept creeping past safe thresholds.
The cost wasn’t just time. Poor deliverability was quietly capping how many campaigns the team could safely run, which capped how many meetings they could book, which capped growth for both Growth Labz and their clients.
“We were spending more time cleaning data than actually launching campaigns. Half of every list was effectively dead weight.”
. Arin Ohandjanian, Growth Labz
Discovery
The Scalelist moment
The shift happened when the team stopped treating data quality as a downstream cleanup task and started treating it as the foundation. Scalelist came in on a single test list, one of the messy ones, and the team expected modest improvement.
What they got back was a list they could actually send to. Higher match rates, cleaner verification, and a noticeable drop in bounces on the very first campaign run against it. Within days, Scalelist moved from “tool we’re trialling” to “step that runs before anything ships.”
“We quickly realised that the issue wasn’t our campaigns, it was the data. Scalelist completely changed the quality of our lists overnight.”
. Arin Ohandjanian, Growth Labz
How they use it
How Growth Labz uses Scalelist.
1. Pre-campaign enrichment
Every raw list, regardless of source, is uploaded to Scalelist before anything else happens. Email enrichment runs across the full dataset, then results are filtered down to verified, high-confidence contacts only.
2. Weekly verification cadence
On a weekly rhythm, the team sources new lead data, enriches and verifies through Scalelist, then segments and distributes lists across active campaigns. Quality stays consistent even as volume scales.
3. Direct hand-off to outreach
Verified lists export straight into the team’s outreach stack. No intermediate cleanup, no second-guessing deliverability, no babysitting bounce rates after launch.
“It’s now an important step in our workflow, every lead list goes through Scalelist before we even think about launching a campaign.”
. Arin Ohandjanian, Growth Labz
Scalelist has allowed us to scale faster, improve performance, and focus on what actually matters, booking meetings and driving results for our clients.
ARIN OHANDJANIAN. DIRECTOR EMEA, GROWTH LABZ
Looking ahead
Scaling output without scaling overhead.
With Scalelist embedded in the workflow, Growth Labz no longer treats data quality as a constraint. The team runs more campaigns in parallel, lands in more inboxes, and protects sender reputation across an expanding portfolio of clients.
Operationally, what used to consume the bulk of a week, cleaning, deduping, verifying, re-verifying, now happens in a single automated step. The bottleneck that defined the old way of working has effectively disappeared.
Next, the team is doubling down on volume: more verticals, larger lists, and tighter segmentation, all without adding headcount on the data side. What was once a bottleneck is now a competitive advantage.