“Sales-tech wizards”
“Highly recommend”

Automate your customer acquisition with a signal-based outbound system

We’ll install and manage a tech-powered outbound system that brings you new “meeting-ready” leads every month with almost no manual work.
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Receive a custom action plan showing how we’d generate interested leads every month. Includes: 5000 verified ICP leads, winning templates & more

We get 62%+ more positive replies than the industry average

All thanks to our magic Scientific Formula
Qualified Leads
+
Relevant Outreach
x
Inbox Deliverability
=
New Customers
Claim Your Free Action Plan
Fully custom with no meeting required
Includes: 5000 verified ICP leads, winning templates and more
Certified Clay, Smartlead & GetSales experts (1/1 in the world)

Install a $150k tech stack into your business without paying for it

There are 100s of sales tools out there, some game-changing, others just overpriced. We’ve tested over 600 to build the ultimate $150K sales stack so you don’t have to. When you partner with us, you get access to this elite stack, managed by certified experts.

These help us land in inboxes and craft intent-driven, hyper-personalised emails that feel handwritten for every prospect. We’ve put our favourite tools in one easy directory, check it out by clicking the button below.
Discover the best sales tools

Our emails make it past spam and people are happy about it

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Reach out to prospects in ways you never thought possible

If you told prospects exactly what they wanted to hear, when they wanted to hear it, do you think they’d reply? We’ve proven time-and-time again the answer to be “yes”. With access to 80+ databases, we use intent signals and unique insights to connect with 10,000s of prospects when they’re most likely to engage. It’s like firing a machine gun with sniper rifle level accuracy.
Here’s just a few of our playbooks that consistently deliver results:
Website visitors
Tech stack
Lookalike audiences
New job posts
Linkedin engagement
LinkedIn company followers
Website updates
Social media activity
Funding activity
Event attendees
Job changes
Ad content
Explore our services

Checkout the incredible results we’re getting

25+
Successful Clients
500k+
Emails Sent per Month
1:198
positive reply rate
Training & Recruitment
How we added £480k revenue & £900k pipeline in 8 months for BePro using an underutilised government funding initiative.
Marketing Agency
How we generated 120 - 150 new interested leads every month for Hummingbird using TikTok growth opportunities.
Marketing Agency
How we created £140k in pipeline in only 3 months for Lyra Studios using a compelling offer to create custom experiential marketing concepts.
View all case studies

We’ve helped 25+ businesses never worry about sales again

"StackOptimise built the outbound system we needed to hit our growth goals."
"StackOptimise built the outbound system we needed to hit our growth goals."
Kieran Routledge
Field Sales Manager @ JRI Orthopaedics
Verified Client
"We are seeing awesome results from the StackOptimise managed outbound system."
"We are seeing awesome results from the StackOptimise managed outbound system."
Will Heylings
CRO @ Atom Learning
Verified Client
“We really struggled with email until StackOptimise helped us out."
“We really struggled with email until StackOptimise helped us out."
Lucy Ham
SDR Manager @ NetBase Quid
Verified Client
“You’re so different. I don’t see anyone doing your approach of lead generation for email... and it works”
“You’re so different. I don’t see anyone doing your approach of lead generation for email... and it works”
Mark Knops
CEO @ SketchLabs
Verified Client
“We’ve completely transformed our sales funnel in terms of volume of opportunity and where the opportunities are coming from. Cold email has consistently delivered around the clock with a consistent conversion rate. This is the most effective way that we’ve found of growing opportunities, growing the sales funnel... even in a super competitive market.”
“We’ve completely transformed our sales funnel in terms of volume of opportunity and where the opportunities are coming from. Cold email has consistently delivered around the clock with a consistent conversion rate. This is the most effective way that we’ve found of growing opportunities, growing the sales funnel... even in a super competitive market.”
Adam Jones
Chief Customer Officer @ BePro
Verified Client
“Sales-tech wizards!”
“Sales-tech wizards!”
Ben Tolliday
Regional Director @ Multiverse
Verified Client
“Felix and Penn are absolute guns at outbound. They’re incredible marketing tacticians with serious tech skills. While everyone else is just recycling the same templates that stop working in a few weeks, these guys are the ones finding the new things that actually work. It’s been an absolute privilege working with them and I couldn’t recommend them more highly.”
“Felix and Penn are absolute guns at outbound. They’re incredible marketing tacticians with serious tech skills. While everyone else is just recycling the same templates that stop working in a few weeks, these guys are the ones finding the new things that actually work. It’s been an absolute privilege working with them and I couldn’t recommend them more highly.”
Tyce Hilton
Founder @ Landing Page Labs
Verified Client
"Experts when it comes to sales-tech, automation and outbound systems"
"Experts when it comes to sales-tech, automation and outbound systems"
Sam Gillingham
Co-Founder @ RocketPhone
Verified Client
“ I’ve been blown away by the results. The team are very engaged. They use all the bleeding edge tools to make sure we’re sending high quality emails to the right people at the right time... More leads are coming every day... certainly recommend using StackOptimise”
“ I’ve been blown away by the results. The team are very engaged. They use all the bleeding edge tools to make sure we’re sending high quality emails to the right people at the right time... More leads are coming every day... certainly recommend using StackOptimise”
Mike Lee
Founder @ Outlier
Verified Client
“We’d use previous cold email agencies and hadn’t been impressed with the results. Since working with Felix and the team we’ve consistently been getting leads and meetings booked in. Prospects respond with literally “good email let’s book in a call”.”
“We’d use previous cold email agencies and hadn’t been impressed with the results. Since working with Felix and the team we’ve consistently been getting leads and meetings booked in. Prospects respond with literally “good email let’s book in a call”.”
Mike Heap
Founder @ MyAskAI
Verified Client
“Our GTM process was really manual. StackOptimise helped us upgrade the whole process and have given us a nice steady stream of quality leads. We’ve been really impressed with the quality of the personalisation in the emails. They’re super easy to work with... can’t recommend them enough.”
“Our GTM process was really manual. StackOptimise helped us upgrade the whole process and have given us a nice steady stream of quality leads. We’ve been really impressed with the quality of the personalisation in the emails. They’re super easy to work with... can’t recommend them enough.”
Matthew Harris
CRO @ Brandbassador
Verified Client
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Where we fit into your sales workflow

We cut out all the manual work for your sales team, so they can spend all their time closing.
We take care of
Campaign
Strategy
Infrastructure Set Up
Inbox
Warming
Email
Sending
Campaign Optimisation
Lead
Handover
All you need to do
Attend
Meeting
Close
Claim Your Free Action Plan
Fully custom with no meeting required
Includes: 5000 verified ICP leads, winning templates and more

Grow your business in 3 easy steps

Claim your free custom action plan
All we need is your work email. We’ll then run a workflow to learn about your business, identify your ICP and build a custom outbound strategy showing exactly how to generate new interested leads every month. You can keep it and action it yourself, or we can do it for you. It also comes with 5000 verified ICP leads, winning templates for your industry and more. All yours to keep regardless of your next move.
We’ll launch and scale your campaign
We take care of everything: campaign strategy, email set up, list building, copywriting, campaign optimisation and lead handover. Whether you’re targeting one ICP or multiple, we’ll create an automated outbound machine that generates new interested leads from your ideal customers. Expect results within weeks, not months.
Enjoy a steady stream of meeting-ready leads
As 30, 50 or even 75 new qualified leads roll-in each month, we’ll provide real-time handovers with info on every lead to help you close the deal. You’ll also have access to a live dashboard to track every lead, regular Loom updates, and strategy sessions to update you on the campaign and ensure you’re always in the loop.

In case you’re wondering how we’re different

Here’s how we compare...
Traditional Agencies
DIY/Inhouse
Lead magnet creation
150k enterprise tech stack
Certified Clay & Smartlead experts
62% more positive replies than industry average
Insights from 5M+ emails
Mobile number generation
Success for 25+ b2b businesses
CRM integration & lead handovers
Senior sales pros only
Weekly updates & live client dashboard
Claim Your Free Action Plan
Fully custom with no meeting required
Includes: 5000 verified ICP leads, winning templates and more

Created by sales leaders to help grow sales

Most agencies start with good intentions but little actual sales experience and end up learning on your dollar. Not us. With a combined 15 years in the trenches, starting as SDRs, closing deals as AEs, and leading teams as Heads of Sales—we know what it takes to drive pipeline and hit ambitious growth goals.

After now sending 2.5M+ emails and driving £5.2M+ in pipeline, we’ve tested every tool, strategy, and workflow to create the automated outbound engine we wish we’d had. Backed by a top team of GTM engineers we take the guesswork out of outbound so you can scale with confidence.
Meet the StackOptimise team

As seen on

What are you waiting for? We’ll be a great fit if:

You’re ready to fill your calendar with high-quality meetings and focus on closing deals
You’re tired of generic outreach that doesn’t deliver and want an intent-driven approach powered by unique data
You want to scale outbound as a channel without increasing headcount
You want access to playbooks that are working right now for businesses like yours
You’re tired of spending money on expensive tools, ads and agencies without seeing results
You want to work with a team that genuinely cares, communicates, and works like an extension of your own

Got questions?
We got answers

What kind of results can I expect?

You can expect 28 to 50 highly interested leads from your exact ICP every month—ready to sit down and hear about your solution. Exact numbers will depend on your industry and market size.

The best way to understand what this could look like for your business is to book a demo, where we’ll walk you through the results you can expect. Or, if you prefer, claim your free outbound action plan to get a detailed breakdown—no meeting required.

On average, our clients see a 62% higher positive reply rate than the industry standard.

Here’s why:

✅ We craft messaging tailored to your market—not generic templates.

✅ We use direct response copywriting designed to increase replies and drive action.

✅ We proactively optimise campaigns, refining strategy to improve results over time


✅ We act as a growth partner, not just a service provider.


✅ We provide full visibility with a live dashboard and weekly updates so you always know what’s working.

How quickly will I start seeing results?

We launch as fast as possible without compromising success. From day one, we set up your deliverability infrastructure, including secondary domains and new email accounts. These are warmed in a premium warm-up pool for two weeks, ensuring a high email score and strong inbox placement. While that’s happening, we build your campaign strategy, identifying the best approach to drive replies and crafting high-converting email copy. By week 3, outreach begins. Positive replies can come in within days with most campaigns seeing traction within the first week of launch.

Do you offer guaranteed results?

We have an exceptional success rate and only partner with businesses we’re extremely confident we can win for. That’s why, in nearly every case, we deliver outstanding results.

But in rare situations, market factors beyond our control—like shifts in demand, changing regulations, or economic downturns—can impact performance. That’s the only reason we can’t guarantee specific numbers.

What we do guarantee is a relentless commitment to success. We’ve helped 25+ businesses generate incredible results across marketing agencies, B2B software, training and recruitment, real estate, and consulting. We use a $150K enterprise tech stack, proven strategies, and continuous optimisation to maximise performance.

We’re one of the leading outbound agencies for a reason. Just check out our case studies. If we take you on, it’s because we know we can deliver. And if we can’t make outbound work for you, no one can.

Will I be able to approve email copy and lead lists?

Yes. You’ll have full visibility and the option to review messaging, lead targeting, and personalisation strategy before campaigns go live—so you’re always aware of what’s happening.

We believe in complete transparency and value your input, but we also know your time is valuable. That’s why we keep you informed without adding extra work, ensuring you stay in the loop while we handle all the heavy lifting.

What visibility do I have over the campaign?

You’ll know exactly what’s happening and how your campaign is performing at all times. We set up an easy-to-use dashboard where you can track real-time performance, including emails sent, replies, and booked meetings. You’ll receive weekly updates on key metrics, planned optimisations, and next steps. Plus, we hold a monthly campaign review meeting to dive deeper into results, strategy, and improvements—keeping you fully informed while we handle the execution.

Do I need to commit to a long term contract?

We ask for a 90-day commitment, then it’s month-to-month with zero lock-in.

Why? Because outbound done right takes time. The first few weeks are dedicated to setting up deliverability infrastructure, warming inboxes, and refining targeting—laying the foundation for high reply rates and strong inbox placement. From there, we test, optimise, and scale to build a system that delivers consistent, high-quality pipeline.

A shorter commitment would mean cutting corners or running a campaign that’s too simple to generate real ROI. 90 days is the minimum time needed to build, refine, and scale an outbound engine that actually works.

After that, it’s your call. By then, you’ll have seen the results—and we’re confident you’ll want to keep going. But we don’t do long-term contracts. Just enough time to prove the impact and set you up for real growth.

Do I need to do anything?

We handle everything—from building lead lists to generating positive replies—so you can focus on closing deals. All we need is a single point of contact on your end to help align stakeholders and coordinate any internal resources, but it’s light project management at most. We also provide detailed lead handovers, fast lead alerts, giving your sales team everything they need to turn the interested leads we generated into new customers. interested prospects into booked meetings.

How do I know if outbound is right for my business?

We handle everything—from sourcing leads to generating positive replies, so you can focus on closing deals. All we need is a single point of contact on your end to align stakeholders and coordinate any internal resources, but it’s minimal effort.You’ll get fast lead alerts and detailed handovers, so your sales team has everything they need to turn interested leads into new customers.

Are you sure you don’t want more sales?
Get a free custom outbound strategy, plus 5000 verified ICP leads and templates working for your industry right now. All we need is your work email.
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