Human Resources Software for Small Businesses: AI Market Discovery Index

Benchmark Summary

Rippling PEO led valid recommendation coverage in September 2026 at 57.1%, up from 54.8% in July 2026, with Gusto at 52.5% in September 2026, up from 51.1% in July 2026, a gap of 4.6 points. The largest coverage increase over the baseline-to-current series was BambooHR, which rose to 40.6% in September 2026 from 35.2% in July 2026, a move within normal month-to-month variation. The largest coverage decline belonged to ADP TotalSource, which fell to 30.3% in September 2026 from 40.4% in July 2026, a decline beyond normal variation. Over the full baseline-to-current series, ADP TotalSource declined from 40.4% in July 2026, Justworks fell from 29.5% in July 2026 to 23.0% in September 2026, Paychex PEO declined from 22.8% to 16.8%, TriNet fell from 23.4% to 17.8%, and Zoho Inventory declined from 3.9% to 1.6%, each beyond normal variation. The benchmark began with 800 prompt-surface observations in each month and produced 613 qualified observations for September 2026 after qualification.

Current Benchmark at a Glance

Qualified surface breadth counts the canonical AI/search surface families with at least one qualified observation: ChatGPT, Copilot, Gemini, Perplexity, AI Overviews, and AI Mode. August 2026 sat between the baseline and current months with 610 qualified observations.

For the strategic interpretation of this benchmark, read CiteWorks Studio's analysis of How AI Search Is Recommending Human Resources Software for Small Businesses

Research Scope and Qualification

The public benchmark is narrower than the raw collection universe by design.

Brand-level percentages use the qualified observations as the public denominator, not the raw collection. Link AI Market Discovery Methodology.

Current Brand Standings

How to Read the Standings

Presence rate is the share of qualified observations where the brand is mentioned in an answer. Valid recommendation coverage is the share of qualified observations where the brand appears in a valid recommendation shortlist. Top-three rate is the share of qualified observations where the brand appears among the top three recommended options. Rank-one rate is the share where the brand is the first recommendation. Net sentiment is the share of positive minus negative mentions among all mentions.

For formulas and denominator rules, see AI Market Discovery Metric Definitions.

Recommendation Coverage Movement

From the immediately prior month, BambooHR rose to 40.6% in September 2026 from 38.9% in August 2026, Deel rose to 50.1% from 46.6%, and Rippling PEO rose to 57.1% from 52.3%, each within normal month-to-month variation. ADP TotalSource fell to 30.3% in September 2026 from 32.6% in August 2026, within normal variation.

Largest Decline: ADP TotalSource

ADP TotalSource declined in each of the two months since July 2026, falling to 30.3% valid recommendation coverage in September 2026 from 40.4% in July 2026, a decline of 10.1 points beyond normal variation. Supporting metrics moved in the same direction: top-three placement fell to 13.2% in September 2026 from 24.9% in July 2026, a decline of 11.7 points, and rank-one placement fell to 5.5% from 13.6%, a decline of 8.1 points. Presence rate also declined, to 52.0% from 58.3%.

Largest Decline: Justworks

Justworks fell to 23.0% valid recommendation coverage in September 2026 from 29.5% in July 2026, a decline of 6.5 points beyond normal variation, following a 7.2-point drop in August 2026. Presence rate also declined, to 37.9% from 40.6%.

Largest Decline: Paychex PEO

Paychex PEO declined in each of the two months since July 2026, falling to 16.8% valid recommendation coverage in September 2026 from 22.8% in July 2026, a decline of 6.0 points beyond normal variation. Top-three placement fell to 5.2% in September 2026 from 9.2% in July 2026, a decline of 4.0 points. Presence rate also declined, to 28.1% from 32.7%.

Largest Decline: TriNet

TriNet fell to 17.8% valid recommendation coverage in September 2026 from 23.4% in July 2026, a decline of 5.6 points beyond normal variation, following a 7.0-point drop in August 2026. Presence rate also declined, to 28.2% from 30.3%.

Largest Decline: Zoho Inventory

Zoho Inventory fell to 1.6% valid recommendation coverage in September 2026 from 3.9% in July 2026, a decline of 2.3 points beyond normal variation, driven by the single month from August 2026 to September 2026. Presence rate also declined, to 2.9% from 5.1%.

Category Leader: Rippling PEO

Rippling PEO led the category in September 2026 at 57.1% valid recommendation coverage, up from 54.8% in July 2026, an increase of 2.3 points within normal month-to-month variation. With Gusto at 52.5%, the top-two gap widened to 4.6 points in September 2026 from 3.7 points in July 2026.

Recommendation Placement Snapshot

Coverage alone does not show how prominently a brand is recommended. In September 2026, Rippling PEO led coverage at 57.1%, yet Gusto placed first in 20.9% of qualified observations versus 12.7% for Rippling PEO.

Close coverage can still hide different first-position rates. Gusto led first-position placement in both months, while Rippling PEO narrowed the gap by raising its rank-one rate to 12.7% in September 2026 from 9.8% in July 2026. BambooHR saw first-position placement edge down to 8.8% in September 2026 from 9.3% in July 2026.

Buyer-Intent Distribution

All qualified observations in July 2026, August 2026, and September 2026 fell into the Brand Recommendation class, which measures AI responses that recommend one or more named brands.

The current public series measures Brand Recommendation discovery only and does not yet contain qualified observations in the Pricing & Value or Multi-Brand Comparison classes.

Historical Measurement Record

This is an evergreen benchmark URL. New measurements are added to the same report.

Evidence and Source Layer

The benchmark is built from prompt-level observations that retain the query, AI/search surface, answer, brand outcome, recommendation placement, sentiment, and, where exposed, citations or attributable evidence sources. Source presence is evidence about the information environment. It is not automatically proof that the source caused the recommendation.

Scope Boundaries

This public benchmark does not measure market share, attributable sales, every possible AI response, organic-search ranking, social mention volume, private or sponsored channels, or causality from a metric movement alone. It records the change; it does not, by itself, establish why the change occurred.

About This Benchmark

The LLM Authority Index AI Market Discovery Index is a neutral, repeatable industry benchmark that tracks how leading AI and search surfaces discuss and recommend brands. It is built from prompt-level observations across six canonical surface families: ChatGPT, Copilot, Gemini, Perplexity, AI Overviews, and AI Mode.

• AI Market Discovery Methodology
• AI Market Discovery Metric Definitions
• AI Market Discovery Research Standards
• Modeled AI Authority Value

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