AI Rankings · Professional Services

ChatGPT's shortlist: HR outsourcing and PEO providers, market by market

HR outsourcing and PEO providers take on payroll, benefits, compliance and HR administration for employers, often as a co-employer that gives small companies access to large-group benefits.

5markets live
120ChatGPT answers read
25 Sep 2026latest snapshot

Across markets

Named in the most markets

  1. TriNet top 20 in 5 of 5 · #1 in 2
  2. Insperity top 20 in 5 of 5 · #1 in 1
  3. ADP TotalSource top 20 in 5 of 5
  4. Justworks top 20 in 5 of 5
  5. Paychex PEO top 20 in 5 of 5
  6. CLEAR Employer Services top 20 in 2 of 5 · #1 in 1
  7. Group Management Services top 20 in 2 of 5
  8. Cornerstone PEO top 20 in 2 of 5
  9. G&A Partners top 20 in 2 of 5
  10. Rippling top 20 in 2 of 5

Nationwide

Snapshot 25 Sep 2026 · 24 answers · 20 named

United States

  1. TriNet83%
  2. Insperity83%
  3. ADP TotalSource79%

Leaders: TriNet, ADP TotalSource

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By state

Snapshot 25 Sep 2026 · 24 answers · 58 named

California

  1. TriNet88%
  2. ADP TotalSource88%
  3. Insperity88%

No Leader yet

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Snapshot 25 Sep 2026 · 24 answers · 42 named

New Jersey

  1. ExtensisHR100%
  2. Cornerstone PEO88%
  3. ADP TotalSource88%

No Leader yet

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Snapshot 25 Sep 2026 · 24 answers · 49 named

Pennsylvania

  1. CLEAR Employer Services92%
  2. Insperity88%
  3. ADP TotalSource88%

Leader: CLEAR Employer Services

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Snapshot 25 Sep 2026 · 24 answers · 41 named

Texas

  1. Insperity88%
  2. G&A Partners79%
  3. TriNet79%

Leader: G&A Partners

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Coming next

Ohio · Illinois · Michigan · Indiana · Maryland · Virginia · Washington, DC · New York · Florida · Massachusetts · Minnesota · Wisconsin · Connecticut · Rhode Island