Ranked · 1 of 3 assessed
Ordered by Agency List ScoreSEO and Google Ads for Lead Generation and Sales
Also in Harrisburg · 2 not ranked here
0 have not yet been assessed on the Agency List Score. Alphabetical.About this ranking
What this page ranks
This page ranks 1 of the 3 assessed SEO agencies in Harrisburg, Pennsylvania — the ones carrying a published score — out of 3 listed.
The score measures how well an agency documents its own work in public — named clients, quantified outcomes, and whether those outcomes are attributed to the agency rather than described as the client's own results. It does not measure client satisfaction, price, or availability.
Cohorts and awards
Agencies are compared within a cohort — here, SEO in Harrisburg, Pennsylvania. A cohort must be large enough to express the band being awarded: at least 8 assessed agencies for a top 25% award, 20 for top 10%, 40 for top 5%, and 300 for top 1%. This one holds 3, so no award can be issued here.
A further 2 were assessed and no published evidence of their work was found, so no score is shown for them.
Paid placement
Partner agencies can buy a labelled placement block above the ranking on this page. It is always marked as paid and is never mixed into the ranked list.
Placement is paid; it does not affect the ranking, cohort membership, or any agency's score. Ranking position, cohort membership and the score itself are not for sale.
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Questions
- How many SEO agencies are in Harrisburg, Pennsylvania?
- 3 are listed on Agency List in Harrisburg, Pennsylvania. 3 of them have been assessed on the Agency List Score as of October 2026, and 1 of those carry a published score.
- Which SEO agency in Harrisburg, Pennsylvania is ranked highest?
- Jason Shaffer Group, with an Agency List Score of 88.2, ranks #1 of 3 assessed agencies in SEO in Harrisburg, Pennsylvania.
- Why are 2 SEO agencies listed here but not ranked?
- 0 of the 3 listed have not yet been assessed on the Agency List Score. A further 2 were assessed and no published evidence of their work was found, so no score is shown for them. They each have a profile and are listed below the ranking, alphabetically, rather than being hidden or mixed into it.
- How is the ranking determined?
- By Agency List Score, within the SEO in Harrisburg, Pennsylvania cohort of 3 assessed agencies. The score is computed from evidence published on each agency's own website: named clients, quantified outcomes, and whether the outcome is attributed to the agency. Paid placement does not affect it.