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

digital marketing agencies in Pennsylvania

2 of the 14 digital marketing agencies on this list are based in Pennsylvania (PA), in Philadelphia, Harrisburg. 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. 09 on the list · Philadelphia, PA

    Seer Interactive

    Since 2002 · 201–500 people

    Seer Interactive is a Philadelphia digital marketing agency founded in 2002 by Wil Reynolds. It provides SEO, paid media, analytics, CRO and generative-engine optimisation, and reports more than 250 team members, 130-plus enterprise clients and a 92 percent retention rate. The company is a certified B Corporation.

    Why it’s hereA B Corp-certified Google Premier Partner and Microsoft Elite Agency Partner whose founder is one of the most cited voices in search marketing.

    Who leads itWil Reynolds, Founder & CEO.

    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.

    SEO · paid media · analytics · conversion rate optimisation · generative-engine optimisation

  2. 10 on the list · Harrisburg, PA

    WebFX

    Since 1995 · 500+ people

    WebFX is a digital marketing agency headquartered in Harrisburg, Pennsylvania, that marks 30 years in business as of 2025. It employs about 750 people delivering SEO, PPC, content, social, web design, CRO and AI consulting through its RevenueCloudFX platform, and reports more than $10 billion in client revenue and 24 million leads generated.

    Why it’s hereTop-ranked Best Place to Work in Pennsylvania nine years running, and among the largest privately held SEO and PPC agencies in the US by headcount.

    Who leads itWilliam Craig, Founder / CEO.

    Published pricing
    • SEO services listed as starting at $3,000/month on its pricing page.

    SEO · PPC · content marketing · web design · RevenueCloudFX platform

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