Case Study

E-commerce Development Agency

Dev agency lands high-ticket Shopify projects through targeted cold outreach campaigns

“With Hello Outbound, we've opened up a new channel for finding leads, booking meetings, and signing clients. We've been able to test different offerings across multiple customer segments, and their strategic support has been key to helping us reach an ROI.”

Sarah Gallagher

Great outbound campaigns start with accurate prospect lists

Gamma Waves (formerly Sellry) is a a leading development and Shopify Plus agency building e-commerce experiences that drive growth.


  • Shopify stores
  • Magento stores
  • Big Commerce stores
  • Food & Bev brands
  • Apparel & Accessory brands


  • Heads of E-commerce (Director, VP, etc.)
  • Heads of Marketing & Growth
  • Founder/CEOs at smaller brands
Winning Strategies

Campaign triggers that led to timely, authentic outreach

Recently Hired @ Shopify Stores

We targeted Marketing & E-commerce leaders who were hired at growing Shopify brands in the last 6 months. Our data shows that prospects respond at a 2-3X higher rate during this period.

Technology Specific

Gamma Waves reached out to users of specific legacy platforms, like Magento, who may need their agency's help migrating to a modern platform like Shopify.

Local Los Angeles

LA is a hot spot for e-commerce brands, and also happens to be where the CEO of Gamma Waves lives. We contacted DTC founders and marketers to set up in-person meetings and invite prospects to local events.


Real pitches that generated meetings via Email and LinkedIn

Email Script: Recently Hired Marketing & E-commerce Leaders

Hi {{FirstName}},

Congrats on making it through the first few months in your new role!

Are you happy with your Shopify development team?

I run a conversion-focused design agency specializing in Shopify Plus. We work with cult-favorite ecommerce brands like Supergoop! and DÔEN, and I'd love to just get on your radar.

Can I share some visuals of our work that you might find inspiring?

Email Script: Food & Bev Brands not on Shopify

Hi {{FirstName}},

Is upgrading or adding new features to your e-commerce tech stack on your radar?

I run an agency that builds beautiful, high-converting shopping experiences for food and bev brands like Nuun and Boarderie.

Would you be interested in our whitepaper on e-commerce strategies for 2024?

LinkedIn Connection Message: Local Angle

Hi {{FirstName}}, I run a strategic e-commerce agency based here in LA and wanted to connect in case you ever need a ux & development partner.

I'd be happy to be share the latest Shopify Summer Edition Takeaway report I put together- or maybe we could grab coffee sometime!