Working with the right partner among the top Klaviyo email marketing agencies can make a big difference for your brand’s retention and revenue. While outsourcing abroad is common, many top performing companies overlook the fact that some of the best Klaviyo email marketing agencies are right here in the US. 

These companies combine deep platform expertise with proven results, having worked with big brands and delivered high performing lifecycle campaigns. Their track record, reliability and ability to work closely with internal teams makes them a smarter long term investment. If you’re looking for scalable growth the best partners might be closer than you think.

That’s why we’ve put together the list of 5 best Klaviyo email marketing agencies in the US, and presented them in the table, along with a description of each of those companies.

Best Klaviyo Email marketing agencies in the US

1. InboxArmy

Founded in 2016, InboxArmy is a dedicated email and SMS marketing agency based in Grapevine, Texas. It employs between 25 and 40 specialists who work exclusively on email and lifecycle campaigns. The agency is led by CEO Scott Cohen, a seasoned marketer with nearly two decades of experience and recipient of the ANA’s 2021 Stefan Pollard Email Marketer of the Year award. Cohen has worked with brands such as 1-800 Contacts, Purple, and SmileDirectClub, and now serves as Co-Chair of the ANA Email Excellence Center. InboxArmy’s clients include eBay, Airbnb, Expedia, Hilton, Zappos, Spotify, Jockey, and Purple. The agency supports over 25 verticals, from ecommerce and healthcare to real estate and SaaS.

2. Blue Wheel

Blue Wheel, founded in 2011, is headquartered in Birmingham, Michigan, and operates with a team of around 110 specialists. CEO Eitan Reshef, appointed in 2021, brings a background in digital commerce and performance marketing. The agency manages over $1 billion in client revenue and combines Klaviyo lifecycle marketing with Amazon DSP, 3PL support, and brand protection services. Notable clients include Funko, Bliss, Sol de Janeiro, Ariat, and Banila Co. Blue Wheel specializes in verticals such as beauty, home goods, fashion, and toys.

3. Hawke Media

Established in 2014 by Erik Huberman, Hawke Media is based in Santa Monica, California, with a team of roughly 255 employees. Huberman, also a Forbes 30 Under 30 honoree, remains CEO and has led the agency’s expansion into outsourced CMO services. Clients include Alibaba, Verizon, Evite, Red Bull, Crocs, Funko, and Bulletproof Coffee. Hawke Media has supported over 5,000 brands and integrates Klaviyo with paid media, influencer marketing, and its proprietary analytics platform, Hawke AI.

4. SmartBug Media

SmartBug Media was founded in 2008 by Ryan Malone and is headquartered in Irvine, California. The company employs about 300 people across six countries. In 2025, Adam Bleibtreu succeeded Malone as CEO, following his tenure as CMO at ASGN Incorporated. The agency is one of only ten Klaviyo Master Elite Partners worldwide and also holds HubSpot’s top Elite Partner status. Its clients include Blix Bikes, Pharmstrong, and CABN, with expertise spanning consumer goods, apparel, SaaS, and higher education.

5. MuteSix

MuteSix, launched in 2014 by Steve Weiss, is based in Culver City, California. The team ranges from 150 to 300 employees. Weiss, still CEO, founded the agency after launching Facebook ad campaigns to promote comedy events—eventually evolving it into a performance-creative powerhouse. Acquired by Dentsu in 2019, MuteSix works with brands like Pair of Thieves, QALO, Theragun, OUAI, and Juiced Bikes. They focus on Klaviyo-integrated email campaigns, paid social, and Amazon DSP for DTC brands in fitness, fashion, and beauty.