Independent list · re-checked September 28, 2026 · published by Primortul LLC

digital marketing agencies in Maryland

2 of the 14 digital marketing agencies on this list are based in Maryland (MD), in Columbia, Baltimore. The other 12 are based elsewhere on the list. Who leads them, the work they can show, and why each one made the list. This is the list, not a ranking of the state. Nobody pays to be ranked.

  1. 01 on the list · Columbia, MD

    Merkle

    Since 1971 · 500+ people

    Merkle is a data-driven customer experience and performance marketing company headquartered in Columbia, Maryland, founded in 1971. It combines first-party data (through its Merkury identity platform), analytics, media, CRM, loyalty and platform engineering for enterprise clients, and now reports more than 16,000 employees in 30-plus countries. Dentsu acquired a majority stake in 2016 and Merkle operates as a dentsu company.

    Why it’s hereThe largest data-led performance marketing agency in the US and the anchor of dentsu's customer-experience network; owned by dentsu.

    Work they can showParty City. Migrated the retailer's ecommerce to Shopify for more flexible, personalized commerce.

    Estimated cost

    Estimated: $6,000–$18,000/mo, typical for US digital marketing retainers; not a quote.

    Typical industry estimate, not a quote from any firm on this list.

    customer data and analytics · performance media · CRM and loyalty · experience and platform engineering

  2. 05 on the list · Baltimore, MD

    Jellyfish

    Since 2005 · 500+ people

    Jellyfish is a global digital media, creative and data business founded in the UK in 2005 that built its reputation as one of the most heavily certified Google Marketing Platform and Google Cloud partners. Its US headquarters has been in Baltimore since 2014, with a New York office opened in 2018, and it develops tools such as Pencil for AI asset creation and Share of Model for tracking brands inside large language models. The Brandtech Group completed its 100 percent acquisition in June 2023.

    Why it’s hereThe largest independent Google Marketing Platform partner before its 2023 sale, now the media arm of The Brandtech Group; owned by The Brandtech Group.

    Work they can showSwarovski. Work the agency credits with 19% growth across 38 markets on 14% less budget. Vodafone Italy. Work the agency credits with a 79% increase in sales.

    Estimated cost

    Estimated: $6,000–$18,000/mo, typical for US digital marketing retainers; not a quote.

    Typical industry estimate, not a quote from any firm on this list.

    Google Marketing Platform · paid media · data and analytics · generative AI creative · training

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