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Europe's retention agency for
brands

Regulated products. Regular revenue.More than

Leading CRM agency boosting D2C e-commerce brands with customized retention strategies. We turn restricted categories into high-performing loyalty machines.

What we do

Multi-channel CRM marketing

Retention strategies that lift repeat purchases, customer lifetime value and engagement, made for restricted B2C businesses.

Klaviyo Management

Klaviyo is our only CRM. We've worked with nothing else since 2020.

Campaigns

From sales pushes to education, inspiration and launches, planned monthly.

Automation

Pre- and post-purchase flows, built sharp and personalized down to the detail.

Lead generation

Pop-ups, embedded forms or landing pages: we optimize your whole lead funnel.

Messenger

WhatsApp & Telegram: community, closeness and real revenue, all in one underused channel.

Push

Push leads complement campaigns and core flows. Underrated tool.

SMS

Short, direct SMS for order updates and campaigns. Quietly drives real revenue.

Loyalty program

Points, tiers and rewards that turn buyers into loyal repeat customers.

Print mailings

Planning, design and delivery for print that still lands in a mailbox.

Built for regulated brands

Industries we serve

We only work with brands that operate fully within the law. Every client is licensed, age-verified and compliant with the regulations in their market.

Cannabis CBD Vapes Tobacco Snus Nicotine pouches Delta-8 Nutraceuticals Peptides and similar
Real results

Impact you can see

Revenue stats before Black Friday

Flexing Black Friday stats? Amateurs. 🙄

We're already breaking revenue records for our clients before others have even finished planning their Black Friday campaign.

Revenue stats across a full year

Yes, this looks like a perfect year.

It's not. December dropped. Would you still be happy with this performance as a client? 🤔

Revenue growth over time

No, you don't need a big brand

We started here with €7K. First 3 months: testing, setup. Then we scaled (that April peak is a 4/20 thing). What we need especially from smaller or new brands: commitment to growth and traffic that keeps coming, we can't work miracles on an empty list. But by choosing us as your CRM team, you've already shown you're ready for that growth 🚀

Single campaign revenue

€1M+ from a single mailing 🔥

Doesn't happen often. We're too proud of this one to keep it to ourselves. These numbers came from a VIP promo. That kind of result only happens with a strong product, loyal customers and a CRM strategy that actually works.

Open rate and deliverability comparison

47%+ open rate? Congrats, you're leaving money on the table.

We optimize for revenue, not a flawless open rate. We push to the limit and find the right balance between performance and strong deliverability. We don't over-clean lists, and we always run winback campaigns to bring dormant subscribers back before writing them off. Question for you: a 47% open rate on 10,000 sends means 4,700 openers. A 34% open rate on 17,000 sends means 5,780 openers. Which one do you think usually makes more money?

Your uplift, your numbers

Ready to see your own results?

Let's get in touch.

By the numbers

Our agency by the numbers

16 years of email marketing experience, distilled into every send.

24 Mio. €Email revenue 2025
⌀ 31%Email revenue share
80 Mio. +Emails delivered 2025
300+A/B tests 2025
60+Brands onboarded since 2020
800K €Push notification revenue 2025
16Years experience
6In-house experts
How we work

Core of our CRM innovation

100% Retention Agency

Our focus is on the perfect email marketing experience and other CRM channels. On-page SEO and the rest, we leave to others.

Neuromarketing

Unlock the subconscious and drive more conversions with consumer psychology and neuromarketing principles baked into every send.

Creative conversion

Turn clicks into conversions with high-CTR templates: clean layouts, sharp focus and one consistent thread all the way through.

Data-driven strategy

Transform data into action with smart segmentation, ultra-personalized experiences and constant A/B testing.

Delivery excellence

Unlock the gateway to high open rates with clean list health, deliverability mastery and VMC/BIMI setup for bigger brands.

Device optimized

From mobile to dark mode, every email is built and tested for perfect presentation in any inbox, on any device.

AI first adopter

We use Claude and the latest LLMs to speed up copy and design, always paired with a human check from our own strategists.

Your extended team

Direct access to strategists and copywriters who work like an extension of your own team, delivering independently and reliably.

Revenue, made visible

See visible results from month one, then sustainable revenue growth built for the long term, tracked every step of the way.

International

15+ languages, each one compliance-first and properly localized, not just translated.

How we work together

Where our work ends and yours begins

A clear split of responsibilities from day one, so nothing falls through the cracks between your brand and your new CRM team.

justmails handles
Account setup
Segmentation
Campaign planning & sending
Flow structure
Copywriting
Design
Deliverability
Scheduling
A/B testing
Reporting
Your brand
Monthly call
Approval
View reporting
Earn more money 😉
Make the first move
Stack

Tools we like

FAQ

Questions worth asking

We work with D2C e-commerce brands in regulated European categories, including cannabis, tobacco, snus, nicotine pouches, nutraceuticals, vapes and other markets where platform restrictions make generic agencies nervous. We also have years of experience with supplement, beauty, food & drink brands and much more, but we've deliberately specialized in regulated categories. Size isn't a factor either: we work with brand-new brands that don't have a revenue history yet, all the way up to established 7-figure brands. If you're unsure whether you fit, just reach out. We'll give you a straight answer, no sales pitch.

Klaviyo is our main CRM and where we do our deepest work, our full attention instead of split focus across 5 tools. That said, for smaller brands Omnisend is a perfectly solid platform too, so switching to Klaviyo isn't always necessary. We're happy to work within Omnisend if that's what fits your size and budget, and can advise if and when a move to Klaviyo would actually pay off.

We recommend a 3-month runway for a proper, long-term setup, but you'll see uplift from month 1. Month 1: full account setup, including basic flows, first campaigns and initial A/B tests, already driving revenue as they go live. Month 2: flows expanded, testing deepened, results building, regular campaigns running. Month 3: scaling up, adding further CRM channels like SMS, WhatsApp or push. The work pays off from day one, not just once the full setup is finished.

Yes. Every send is written and designed in-house, human-finalized only, built on neuromarketing principles with a clear structure, and shaped around your brand identity and voice instead of a generic template.

Our team speaks English, German, Polish, French and Spanish. Campaigns themselves go out in 15+ languages, tailored individually to each brand and market.

It depends entirely on your brand: list size, channels used and how much volume you need. Pricing is a monthly retainer that scales with scope, whether you're a new brand or an established 7-figure one. A performance-based, success-driven pricing option is also available. Reach out for a quote tailored to you.

No lock-in. There are no long-term contracts holding you hostage. You can walk away anytime, so we earn the work every month, not just the first one.

Available for your project

Let's have a chat.

Sami Demirel, founder of justmails
Hi, I'm Sami, the reason you'll finally turn off your endless Shopify app order notifications. In email marketing since 2010, exclusively on Klaviyo since 2020. I've worked with everything from scrappy startups to established nine-figure brands, focused on regulated markets for the past few years.
Usually replies personally within a few hours, looking forward to hearing from you.
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