“Excellent Company ”
Sergey and his team are great! They are results driven and have made a big impact to our e-commerce clients and email marketing. They’ve helped scale some of our clients to over 40% additional revenue. Highly recommend!

Email & SMS Marketing Agency for DTC Brands
Overview
Bossar is a specialized eCommerce email marketing agency focused on email and SMS. With 5+ years of experience and a proven track record across 100+ stores, we focus exclusively on retention marketing that drives measurable results.
Most of the brands we work with are established eCommerce businesses, and the majority of our clients operate in the 6- to 8-figure revenue range. This focus allows us to craft strategies built for scale, helping growth-minded brands unlock the full potential of email and SMS. Our longest-standing client has been with us for over 4 years, proof that our strategies create growth that lasts.
As a full-service email marketing agency, our core offer is done-for-you email & SMS management, which covers every aspect of retention marketing, including:
✔️ Automated email & SMS flows tailored to your brand and customer journey
✔️ Campaign planning, execution, and optimization
✔️ Audience segmentation and advanced personalization
✔️ Custom design + conversion-driven copywriting
✔️ Deliverability monitoring and inbox placement
✔️ A/B testing and performance optimization
✔️ Detailed reporting and actionable insights
If your store is under $50K/month in sales or you’re not ready for ongoing monthly management, we also offer one-time flow setups and custom projects designed to match your tech stack and business needs. Whether you need a dedicated Klaviyo email marketing agency or support with another ESP, our team builds flows and campaigns tailored to your system.
With Bossar, you’re not hiring a generic provider, you’re partnering with a retention-focused email marketing agency that lives and breathes email & SMS, turning them into your most profitable growth channels.
Want to identify missed revenue opportunities in your retention marketing? Visit our website and apply for a free audit here: https://bossar.agency/free-audit (no obligations) to get actionable insights tailored to your store.
What clients say
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What reviewers mention most
“Excellent Company ”
Sergey and his team are great! They are results driven and have made a big impact to our e-commerce clients and email marketing. They’ve helped scale some of our clients to over 40% additional revenue. Highly recommend!
“Amazing Work”
I had an amazing experience working with this firm. They were fast, professional, detailed, and super patient with me. They were able to hold my hand during the process. Definitely will work with Bossar again.
“Awesome Shopify experts”
We've worked with Bossar to create our Shopify store and they are awesome experts on this field. They've developed an ultra fast and great store for us and documented & explained every function well with tutorial videos.
“Excellent Work”
We provided a mock and scope of the design we needed. They delivered a perfect design of the pages exactly as we wanted them. Communication was excellent. Very talented team. We will work with them again.
“The best design firm we have worked with”
The team works hard and provides an exceptional product. I'm continually amazed at what they are able to design and develop, whether it be one of the many Shopify stores we have done for them or a Saas website. I am a perfectionist and often have multiple revisions, which they have implemented without any fuss. I highly recommend the Bossar design team.
Focus
How the team's effort is distributed across services.
Where their work concentrates - by industry, budget, and timeline.
Where we are
Offices where Bossar operates.