Firestorm SEM

King of Prussia, Pennsylvania, United States

SEO and PPC strategies for ecommerce and global brands

Founded in 2011 by Jonathan Stec and Mark Barletta, Firestorm SEM is a top-rated SEO and PPC hybrid agency headquartered in King of Prussia, PA. The agency is recognized for its performance-driven digital marketing strategies and is trusted by ecommerce brands, B2B organizations, and global companies. By operating remotely, Firestorm SEM reduces overhead costs, allowing them to offer competitive pricing while maintaining transparency, integrity, and ethics.

As a certified Google Partner, Firestorm SEM specializes in technical and content SEO, high-performance PPC campaigns, and ecommerce growth strategies. The agency provides both global and local SEO and PPC services, ensuring comprehensive solutions tailored to meet diverse client needs. Their approach combines technical expertise with strategic content development to drive measurable results.

Firestorm SEM has collaborated with well-known brands such as GNC, Toys“R”Us, and Skullcandy, demonstrating their capability to manage and execute successful digital marketing campaigns. Their commitment to excellence and client satisfaction is evident in the long-term partnerships and trust they have built within the industry.

15
YEARS IN BUSINESS
3
SERVICES

Capabilities

Services

What these services involve

Conversion Rate Optimization
Testing and UX improvements that increase leads and sales from existing traffic.
Search Engine Optimization
Technical and content improvements that increase organic search visibility.
Website Optimization
Improvements to speed, UX, SEO foundations, and site performance.

Agency details

Team size
11-50 people
Founded
2011 (15 years)

About this agency on Agency List

Firestorm SEM holds an Agency List Score of 96 out of 100.

That score is higher than 90% of the 36,920 agencies Agency List has assessed so far.

The Agency List Score measures how well an agency documents its work in public: named clients, quantified outcomes, and whether those outcomes are attributed to the agency rather than to the client.

It does not measure client satisfaction, price, or availability.

How the Agency List Score is measured

Assessment date

Agency List assessed Firestorm SEM in September 2026, reading 7 pages published on firestormsem.com.

The score reflects what Firestorm SEM had published by that date; anything published since has not been read.

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