Kai Cabero is the founder of Scale Chain, a growth consultancy specializing in business development for blockchain, AI, and deep-tech companies. Scale Chain’s primary focus is leveraging cold outreach at scale to secure high-value meetings with billion-dollar companies, investors, and other potentials for their business and their clients.
With cold outreach at the core of both businesses, Kai has been using Smartlead daily for the past three years to power his high-volume, highly personalized outbound system.
This has allowed Scale Chain to successfully help its clients book meetings with industry giants like Samsung and consistently drive revenue through hyper-targeted cold email strategies.
In addition to Scale Chain, Kai runs Wealth Builders, a coaching and consulting program that helps agency owners, coaches, and consultants scale their businesses, aiming to add $20K to $50K MRR in 16 weeks.
As a non-tech-savvy person, Kai’s biggest priority was finding a cold email tool that was simple, effective, and reliable without requiring extensive technical expertise.
Here were some of the significant roadblocks they faced before switching to Smartlead:
After testing multiple tools, Kai switched to Smartlead and has been using it since its launch.
Key reasons for choosing Smartlead:
“Smartlead is never down. There’s never a technical blackout. And the support is insane—I can talk to someone in two minutes if I have a problem, and they always resolve it.”
— Kai Cabero, Founder, Scale Chain
Cold email is the foundation of Scale Chain’s outbound strategy, allowing them to directly reach decision-makers in real-time and close deals without ad spend.
Using Smartlead’s automation and scaling capabilities, Kai has:
“Cold email is cost-effective. You're not burning ad spend, and you can reach anyone on the planet within 10 minutes—it’s crazy.”
Before Smartlead, email deliverability was a major bottleneck—messages often landed in spam, reducing response rates.
With SmartDelivery, Kai’s team can now:
Smartlead integrates seamlessly with Kai’s CRM system, making client campaign tracking effortless. Here are a few things that the client's dashboard offers:
“The client dashboard is insane. I can see all my data in one place, which is crucial for client reporting and tracking results.”
Using Smartlead, Scale Chain closed over $100,000 in sales directly from cold email—a major milestone for the agency.
Their best campaign performance included:
“Unlike most cold emailers sending 20,000+ emails to get a few replies, I play the game differently—I send as few emails as possible to get the most meetings. And Smartlead makes that possible.”
Kai has been using Smartlead for a long time now and he’s quite happy with all the features and support which is why he rates Smartlead 9.5/10. He’s also looking forward a few new features:
“The bigger Smartlead gets, the better its customer service becomes. That’s rare.”
For agencies and businesses relying on cold email, Smartlead is the ultimate solution. As Kai stated, Smartlead offers unmatched email deliverability & reliability, cost-effective high-volume sending, automated reporting & campaign tracking, and industry-best cold email community & support.
With over $100K in revenue from Smartlead-powered outreach, Kai continues to scale his business with Smartlead as the backbone of his cold email strategy. You, too, can scale your business with Smartlead.
What do you need to do? Check our 14-day free trial and see the results you can achieve with Smartlead’s cold email outbound solutions.
Join us to elevate your outreach!
Founder, StackOptimise
Smartlead's combination of automation, unlimited inboxes, and easy campaign management has completely transformed how we run cold email campaigns.
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Founder, Cold Email Hackers
We have about 15 companies and we use Smartlead for all of them.
Founder, DutchSave Media
One of the things I love about using Smartlead is the deliverability feature. If they landed in the bounce or spam folders, we could resolve this quickly.
Co-Founder, Growth Today
I want to continue to use Smartlead to make operations more seamless - the plan is to bring more clients here and build more SOPs.
Founder, FueltoFly
Smartlead listens to the agencies and customers and builds according to what people want, that has really made things easier for us.
Founder, OutboundSync
We build an infrastructure product, and OutboundSync communicates with Smartlead itself. I love the webhook and API. They're really well done and keep getting better.
Founder, Axoleads
With SmartDelivery, you can put all of that in the hands of the tool. It ensures your emails land in inboxes, and by running a simple test, you can see if you're hitting the mark.
Founder, Claygen
Deliverability is the cornerstone of cold email outreach. You could have the best email copy in the world, but if no one is seeing it, it's useless. I really love the feature where you can actually give client accesses to your clients.
Co-Founder, Cymate
I do not want to switch to another software. Pick a solution you trust, stick with it, and keep refining your copy.
CMO, Avalanche Capital
Managing large volumes of emails through multiple inboxes used to be a logistical nightmare. With Smartlead, the process is seamless. We book thousands of discovery calls through cold emails. These campaigns are generating leads at a scale we never thought possible.
Founder, Growth Engine X
We came for the unlimited inboxes, and we stayed for the API. 1.5M cold emails/month, 7,767+ inboxes managed.
Head of Community & Ecosystem, TxtCart
You cannot replace having 10,000 touches with potential clients. When you have that much distribution and reach, you really start to see incredible results. The simplicity of Smartlead made all the difference. It doesn't require you to be a technical wizard.
Founder, Hyperke
Smartlead has been a game-changer for us. It increased our appointment volume, improved ease of use, and offered valuable features. 80% increase in appointments/month, peak of 276 appointments in a single month.
Founder, Kinetyca
Smartlead has been our cold email backbone from day one. The platform evolves constantly, keeping pace with how deliverability and personalization need to work today. 21% overall reply rate, $175K in 4 months for multiple B2B clients.
Founder, Reachflow
Smartlead is centered around deliverability and constantly evolving. Their API is not like any other platform. Smartlead covers all our needs. The focus on core features like deliverability and API integration is unmatched.
CEO, Halfwarm
Our approach to crafting conversational emails led to reply rates that many of my peers thought were unattainable.
Co-Founder, letstrike
We've grown on zero capital, zero marketing, purely cold emailing - and that's the story we love to tell. The best approach is no approach if you can't handle domain meltdown. The second best is something like Smartlead that's built from the ground up for deliverability at scale.
Founder, Fenixtal
Smartlead's white-labeling and automation let us punch above our weight. The 12M euros sales potential? That's what happens when you combine human creativity with Smartlead's precision.
Co-Founder, Digital Creativs
Nine out of 10. Ninety percent of our clients are on Smartlead unless they come in with an existing setup. That's the default.
Co-Founder, BuildingReach
At the end of the day, you have to take a bet on one tool or another. It was a no-brainer taking that bet on Smartlead. We had to even turn down the volume of our marketing campaigns - Smartlead was capable of driving more volume than our sales team was able to fulfill.
Founder & MD, Prospectiv
Since starting the business in January of this year, we've already generated $200K in sales exclusively from cold email. Smartlead has been central to our operations and has exceeded our expectations.
Founder, Growthlynk
There's so much stuff built on top of it. I would be dead if I had to rebuild it with another tool. I can manage hundreds of senders easily. I can send hundreds of thousands of emails.
Founder, Corebits
The platform's HubSpot integration, real-time Slack updates, and advanced campaign customization have been game changers for our business and our clients'.
Founder, Apex Ascension
From day one, we've never used anything else.
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