What AI assistants actually recommend when buyers ask about self-hosted applicant tracking systems — measured weekly across 4 engines, published as open data.
Updated 2026-08-02 · 56 sampled answers · rolling 4-week window · methodology
Rankings are measured from sampled AI answers — never editorial, never paid. Orbator builds AI-visibility tooling; when Orbator itself appears in any category, it is measured by the same rules as everyone else.
Sample: 56 AI answers · Window: Jul 5, 2026 – Aug 2, 2026 (4-week rolling) · trend vs prior 4 weeks (42 answers)
Across 56 sampled AI answers from 4 engines, OpenCATS is recommended most often — appearing in 78.6% of recommendations, followed by Recruitment (67.9%) and OrangeHRM (57.1%).
This is a measurement of share of voice across 4 AI engines — not an editorial pick. See the full ranking below.
| # | Product | Share | Trend | Engines | |
|---|---|---|---|---|---|
| 1 | OpenCATS opencats.org Best for: AI recommends OpenCATS most when buyers ask “best open-source ATS for a company that wants to keep candidate data off third-party servers” (100% of those answers) | 78.6% 95% CI 66.2–87.3% 44 mentions · avg pos 3.8 first pick 50% | — | GEMINI 76.2%CHATGPT 85.7%CLAUDE 71.4%PERPLEXITY 81% | Claim |
| 2 | Recruitment Best for: AI recommends Recruitment most when buyers ask “open-source ATS alternatives to expensive cloud-based recruiting and hiring platforms” (100% of those answers) | 67.9% 95% CI 54.8–78.6% 38 mentions · avg pos 4.8 first pick 28.9% | — | GEMINI 90.5%CHATGPT 85.7%CLAUDE 42.9%PERPLEXITY 47.6% | Claim |
| 3 | OrangeHRM orangehrm.com Best for: AI recommends OrangeHRM most when buyers ask “best self-hosted applicant tracking system for a startup hiring its first 20 people” (75% of those answers) | 57.1% 95% CI 44.1–69.2% 32 mentions · avg pos 7.6 first pick 6.3% | — | GEMINI 66.7%CHATGPT 71.4%CLAUDE 28.6%PERPLEXITY 52.4% | Claim |
| 4 | Reqcore reqcore.com Best for: AI recommends Reqcore most when buyers ask “best open-source ATS for a company that wants to keep candidate data off third-party servers” (100% of those answers) | 51.8% 95% CI 39–64.3% 29 mentions · avg pos 5.8 first pick 17.2% | — | GEMINI 28.6%CHATGPT 85.7%CLAUDE 57.1%PERPLEXITY 61.9% | Claim |
| 5 | Odoo odoo.com Best for: AI recommends Odoo most when buyers ask “which open-source ATS integrates best with self-hosted HR management software” (87.5% of those answers) | 48.2% 95% CI 35.7–61% 27 mentions · avg pos 5.7 first pick 14.8% | — | GEMINI 33.3%CHATGPT 71.4%CLAUDE 71.4%PERPLEXITY 47.6% | Claim |
| 6 | Docker docker.com Best for: AI recommends Docker most when buyers ask “how do I self-host a hiring pipeline tool that supports job postings, resume parsing, and interview scheduling” (87.5% of those answers) | 46.4% 95% CI 34–59.3% 26 mentions · avg pos 7.1 first pick 11.5% | — | GEMINI 52.4%CHATGPT 85.7%CLAUDE 28.6%PERPLEXITY 33.3% | Claim |
| 7 | ERPNext erpnext.com Best for: AI recommends ERPNext most when buyers ask “which open-source ATS integrates best with self-hosted HR management software” (87.5% of those answers) | 42.9% 95% CI 30.8–55.9% 24 mentions · avg pos 5.9 first pick 12.5% | — | GEMINI 33.3%CHATGPT 71.4%CLAUDE 42.9%PERPLEXITY 42.9% | Claim |
| 8 | Horilla horilla.com Best for: AI recommends Horilla most when buyers ask “how do I self-host a hiring pipeline tool that supports job postings, resume parsing, and interview scheduling” (75% of those answers) | 33.9% 95% CI 22.9–47% 19 mentions · avg pos 2.7 first pick 21.1% | — | GEMINI 47.6%CLAUDE 14.3%PERPLEXITY 38.1% | Claim |
| 9 | PostgreSQL postgresql.org Best for: AI recommends PostgreSQL most when buyers ask “how do I self-host a hiring pipeline tool that supports job postings, resume parsing, and interview scheduling” (100% of those answers) | 33.9% 95% CI 22.9–47% 19 mentions · avg pos 6.2 first pick 10.5% | — | GEMINI 57.1%CHATGPT 57.1%CLAUDE 14.3%PERPLEXITY 9.5% | Claim |
| 10 | RabbitHR rabbithr.co Best for: AI recommends RabbitHR most when buyers ask “what open-source applicant tracking system should a government agency use to meet data residency rules” (50% of those answers) | 26.8% 95% CI 17–39.6% 15 mentions · avg pos 3.7 first pick 6.7% | — | GEMINI 61.9%PERPLEXITY 9.5% | Claim |
| 11 | FreeATS freeats.com Best for: AI recommends FreeATS most when buyers ask “open-source ATS alternatives to expensive cloud-based recruiting and hiring platforms” (62.5% of those answers) | 26.8% 95% CI 17–39.6% 15 mentions · avg pos 7.6 first pick 0% | — | GEMINI 42.9%CHATGPT 14.3%CLAUDE 14.3%PERPLEXITY 19% | Claim |
| 12 | Odoo Recruitment Best for: AI recommends Odoo Recruitment most when buyers ask “how do I self-host a hiring pipeline tool that supports job postings, resume parsing, and interview scheduling” (50% of those answers) | 26.8% 95% CI 17–39.6% 15 mentions · avg pos 8.7 first pick 20% | — | GEMINI 23.8%CHATGPT 57.1%CLAUDE 14.3%PERPLEXITY 23.8% | Claim |
| 13 | MySQL mysql.com Best for: AI recommends MySQL most when buyers ask “how do I self-host a hiring pipeline tool that supports job postings, resume parsing, and interview scheduling” (75% of those answers) | 21.4% 95% CI 12.7–33.8% 12 mentions · avg pos 9.2 first pick 0% | — | GEMINI 33.3%CHATGPT 28.6%CLAUDE 28.6%PERPLEXITY 4.8% | Claim |
| 14 | CandidATS Best for: AI recommends CandidATS most when buyers ask “open-source ATS alternatives to expensive cloud-based recruiting and hiring platforms” (62.5% of those answers) | 17.9% 95% CI 10–29.8% 10 mentions · avg pos 6.4 first pick 10% | — | GEMINI 14.3%CHATGPT 14.3%PERPLEXITY 28.6% | Claim |
| 15 | OrangeHRM Community Best for: AI recommends OrangeHRM Community most when buyers ask “how do I self-host a hiring pipeline tool that supports job postings, resume parsing, and interview scheduling” (37.5% of those answers) | 8.9% 95% CI 3.9–19.3% 5 mentions · avg pos 6.8 first pick 0% | — | GEMINI 4.8%CLAUDE 14.3%PERPLEXITY 14.3% | Claim |
| 16 | Greenhouse greenhouse.io Best for: AI recommends Greenhouse most when buyers ask “open-source ATS alternatives to expensive cloud-based recruiting and hiring platforms” (50% of those answers) | 8.9% 95% CI 3.9–19.3% 5 mentions · avg pos 29 first pick 0% | — | CHATGPT 28.6%PERPLEXITY 14.3% | Claim |
| 17 | SpotAxis | 7.1% 95% CI 2.8–17% 4 mentions · avg pos 7.5 first pick 0% | — | GEMINI 14.3%PERPLEXITY 4.8% | Claim |
| 18 | NGINX nginx.org Best for: AI recommends NGINX most when buyers ask “how do I self-host a hiring pipeline tool that supports job postings, resume parsing, and interview scheduling” (50% of those answers) | 7.1% 95% CI 2.8–17% 4 mentions · avg pos 17 first pick 0% | — | GEMINI 14.3%CHATGPT 14.3% | Claim |
| 19 | Apache Hop apache.org Best for: AI recommends Apache Hop most when buyers ask “how do I self-host a hiring pipeline tool that supports job postings, resume parsing, and interview scheduling” (50% of those answers) | 7.1% 95% CI 2.8–17% 4 mentions · avg pos 25.8 first pick 0% | — | GEMINI 9.5%CHATGPT 14.3%CLAUDE 14.3% | Claim |
| 20 | OrangeHRM Community Edition | 5.4% 95% CI 1.8–14.6% 3 mentions · avg pos 3 first pick 0% | — | GEMINI 4.8%CLAUDE 14.3%PERPLEXITY 4.8% | Claim |
| 21 | Recruit | 5.4% 95% CI 1.8–14.6% 3 mentions · avg pos 3 first pick 0% | — | GEMINI 4.8%PERPLEXITY 9.5% | Claim |
| 22 | Frappe HR Best for: AI recommends Frappe HR most when buyers ask “which open-source ATS integrates best with self-hosted HR management software” (37.5% of those answers) | 5.4% 95% CI 1.8–14.6% 3 mentions · avg pos 3.7 first pick 0% | — | GEMINI 9.5%CHATGPT 14.3% | Claim |
| 23 | JobOps Best for: AI recommends JobOps most when buyers ask “how do I self-host a hiring pipeline tool that supports job postings, resume parsing, and interview scheduling” (37.5% of those answers) | 5.4% 95% CI 1.8–14.6% 3 mentions · avg pos 4 first pick 0% | — | PERPLEXITY 14.3% | Claim |
| 24 | Workable workable.com | 5.4% 95% CI 1.8–14.6% 3 mentions · avg pos 10 first pick 0% | — | CHATGPT 14.3%PERPLEXITY 9.5% | Claim |
| 25 | Lever lever.co Best for: AI recommends Lever most when buyers ask “open-source ATS alternatives to expensive cloud-based recruiting and hiring platforms” (37.5% of those answers) | 5.4% 95% CI 1.8–14.6% 3 mentions · avg pos 29.3 first pick 0% | — | CHATGPT 14.3%PERPLEXITY 9.5% | Claim |
| 26 | Ashby ashbyhq.com | 5.4% 95% CI 1.8–14.6% 3 mentions · avg pos 70 first pick 0% | — | CHATGPT 28.6%PERPLEXITY 4.8% | Claim |
| 27 | Open HRMS openhrms.com | 3.6% 95% CI 1–12.1% 2 mentions · avg pos 4.5 first pick 50% | — | GEMINI 4.8%PERPLEXITY 4.8% | Claim |
| 28 | Sentrifugo sentrifugo.com | 3.6% 95% CI 1–12.1% 2 mentions · avg pos 4.5 first pick 0% | — | GEMINI 4.8%PERPLEXITY 4.8% | Claim |
| 29 | UJAS | 3.6% 95% CI 1–12.1% 2 mentions · avg pos 6 first pick 0% | — | GEMINI 9.5% | Claim |
| 30 | ICE HRM icehrm.com | 3.6% 95% CI 1–12.1% 2 mentions · avg pos 11.5 first pick 0% | — | GEMINI 4.8%CHATGPT 14.3% | Claim |
| 31 | SourceForge sourceforge.net | 3.6% 95% CI 1–12.1% 2 mentions · avg pos 12 first pick 0% | — | CHATGPT 14.3%PERPLEXITY 4.8% | Claim |
| 32 | Ubuntu ubuntu.com | 3.6% 95% CI 1–12.1% 2 mentions · avg pos 18 first pick 0% | — | GEMINI 9.5% | Claim |
| 33 | MariaDB mariadb.org | 3.6% 95% CI 1–12.1% 2 mentions · avg pos 27 first pick 0% | — | GEMINI 4.8%CHATGPT 14.3% | Claim |
| 34 | Cal.com cal.com | 3.6% 95% CI 1–12.1% 2 mentions · avg pos 64 first pick 0% | — | CHATGPT 28.6% | Claim |
| 35 | Breezy breezy.hr | 3.6% 95% CI 1–12.1% 2 mentions first pick 0% | — | GEMINI 4.8%PERPLEXITY 4.8% | Claim |
| 36 | Breezy HR breezyhr.com | 3.6% 95% CI 1–12.1% 2 mentions first pick 0% | — | GEMINI 4.8%PERPLEXITY 4.8% | Claim |
| 37 | MokaHR mokahr.io Best for: AI recommends MokaHR most when buyers ask “what open-source applicant tracking system should a government agency use to meet data residency rules” (37.5% of those answers) | 3.6% 95% CI 1–12.1% 2 mentions first pick 0% | — | PERPLEXITY 9.5% | Claim |
| 38 | OpenAlternative openalternative.co | 3.6% 95% CI 1–12.1% 2 mentions first pick 0% | — | PERPLEXITY 9.5% | Claim |
| 39 | ejobsitesoftware.com ejobsitesoftware.com Best for: AI recommends ejobsitesoftware.com most when buyers ask “how do I self-host a hiring pipeline tool that supports job postings, resume parsing, and interview scheduling” (37.5% of those answers) | 3.6% 95% CI 1–12.1% 2 mentions first pick 0% | — | PERPLEXITY 9.5% | Claim |
| 40 | ERPNext HRMS | 1.8% 95% CI 0.3–9.4% 1 mentions · avg pos 3 first pick 0% | — | PERPLEXITY 4.8% | Claim |
| 41 | Baserow baserow.io | 1.8% 95% CI 0.3–9.4% 1 mentions · avg pos 6 first pick 0% | — | GEMINI 4.8% | Claim |
| 42 | MintHCM minthcm.org | 1.8% 95% CI 0.3–9.4% 1 mentions · avg pos 7 first pick 0% | — | GEMINI 4.8% | Claim |
| 43 | JobSync | 1.8% 95% CI 0.3–9.4% 1 mentions · avg pos 12 first pick 0% | — | PERPLEXITY 4.8% | Claim |
| 44 | DigitalOcean digitalocean.com | 1.8% 95% CI 0.3–9.4% 1 mentions · avg pos 17 first pick 0% | — | CHATGPT 14.3% | Claim |
| 45 | Apache Tika | 1.8% 95% CI 0.3–9.4% 1 mentions · avg pos 69 first pick 0% | — | CHATGPT 14.3% | Claim |
| 46 | Workday workday.com | 1.8% 95% CI 0.3–9.4% 1 mentions · avg pos 71 first pick 0% | — | CHATGPT 14.3% | Claim |
| 47 | BambooHR bamboohr.com | 1.8% 95% CI 0.3–9.4% 1 mentions · avg pos 72 first pick 0% | — | CHATGPT 14.3% | Claim |
| 48 | Deel deel.com Best for: AI recommends Deel most when buyers ask “what open-source applicant tracking system should a government agency use to meet data residency rules” (37.5% of those answers) | 1.8% 95% CI 0.3–9.4% 1 mentions first pick 0% | — | PERPLEXITY 4.8% | Claim |
| 49 | Dev.to dev.to | 1.8% 95% CI 0.3–9.4% 1 mentions first pick 0% | — | PERPLEXITY 4.8% | Claim |
| 50 | FedRAMP fedramp.gov | 1.8% 95% CI 0.3–9.4% 1 mentions first pick 0% | — | CHATGPT 14.3% | Claim |
| 51 | Goodfirms goodfirms.co | 1.8% 95% CI 0.3–9.4% 1 mentions first pick 0% | — | PERPLEXITY 4.8% | Claim |
| 52 | Gusto gusto.com | 1.8% 95% CI 0.3–9.4% 1 mentions first pick 0% | — | PERPLEXITY 4.8% | Claim |
| 53 | Jobberbase | 1.8% 95% CI 0.3–9.4% 1 mentions first pick 0% | — | CLAUDE 14.3% | Claim |
| 54 | Manatal manatal.com Best for: AI recommends Manatal most when buyers ask “what open-source applicant tracking system should a government agency use to meet data residency rules” (37.5% of those answers) | 1.8% 95% CI 0.3–9.4% 1 mentions first pick 0% | — | PERPLEXITY 4.8% | Claim |
| 55 | Metaview metaview.ai | 1.8% 95% CI 0.3–9.4% 1 mentions first pick 0% | — | PERPLEXITY 4.8% | Claim |
| 56 | SmartRecruiters smartrecruiters.com | 1.8% 95% CI 0.3–9.4% 1 mentions first pick 0% | — | CHATGPT 14.3% | Claim |
| 57 | Treegarden treegarden.io Best for: AI recommends Treegarden most when buyers ask “what open-source applicant tracking system should a government agency use to meet data residency rules” (37.5% of those answers) | 1.8% 95% CI 0.3–9.4% 1 mentions first pick 0% | — | PERPLEXITY 4.8% | Claim |
| 58 | Zoho zoho.com | 1.8% 95% CI 0.3–9.4% 1 mentions first pick 0% | — | GEMINI 4.8% | Claim |
| 59 | iCIMS icims.com | 1.8% 95% CI 0.3–9.4% 1 mentions first pick 0% | — | CHATGPT 14.3% | Claim |
Reading the numbers: Share is a point estimate on 56 sampled answers, so each row also shows its 95% CI — the Wilson score interval around that share. When two products' intervals overlap, the gap between them isn't statistically meaningful at this sample size. First pick is the share of a product's recommending answers where it was named first, which separates “always mentioned” from “usually the top recommendation”. Full methodology.
Independence: Orbator customers are badged for disclosure. Customer status does not affect prompts, sampling, extraction, or ranking — see the methodology. Your product on this list? Claim it to see the prompts behind your rank and track it weekly.
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