AI Index / Self-hosted applicant tracking systems

Best Self-hosted applicant tracking systems

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.

Updated weekly56 samples4 enginesmethodology

Sample: 56 AI answers · Window: Jul 5, 2026Aug 2, 2026 (4-week rolling) · trend vs prior 4 weeks (42 answers)

What is the best self-hosted applicant tracking systems?

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.

#ProductShareTrendEngines
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 66.287.3%

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 54.878.6%

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 44.169.2%

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 3964.3%

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 35.761%

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 3459.3%

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 30.855.9%

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 22.947%

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 22.947%

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 1739.6%

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 1739.6%

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 1739.6%

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 12.733.8%

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 1029.8%

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 3.919.3%

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 3.919.3%

5 mentions · avg pos 29

first pick 0%

CHATGPT 28.6%PERPLEXITY 14.3%
Claim
17
SpotAxis

7.1%

95% CI 2.817%

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 2.817%

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 2.817%

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 1.814.6%

3 mentions · avg pos 3

first pick 0%

GEMINI 4.8%CLAUDE 14.3%PERPLEXITY 4.8%
Claim
21
Recruit

5.4%

95% CI 1.814.6%

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 1.814.6%

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 1.814.6%

3 mentions · avg pos 4

first pick 0%

PERPLEXITY 14.3%
Claim
24
Workable

workable.com

5.4%

95% CI 1.814.6%

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 1.814.6%

3 mentions · avg pos 29.3

first pick 0%

CHATGPT 14.3%PERPLEXITY 9.5%
Claim
26
Ashby

ashbyhq.com

5.4%

95% CI 1.814.6%

3 mentions · avg pos 70

first pick 0%

CHATGPT 28.6%PERPLEXITY 4.8%
Claim
27
Open HRMS

openhrms.com

3.6%

95% CI 112.1%

2 mentions · avg pos 4.5

first pick 50%

GEMINI 4.8%PERPLEXITY 4.8%
Claim
28
Sentrifugo

sentrifugo.com

3.6%

95% CI 112.1%

2 mentions · avg pos 4.5

first pick 0%

GEMINI 4.8%PERPLEXITY 4.8%
Claim
29
UJAS

3.6%

95% CI 112.1%

2 mentions · avg pos 6

first pick 0%

GEMINI 9.5%
Claim
30
ICE HRM

icehrm.com

3.6%

95% CI 112.1%

2 mentions · avg pos 11.5

first pick 0%

GEMINI 4.8%CHATGPT 14.3%
Claim
31
SourceForge

sourceforge.net

3.6%

95% CI 112.1%

2 mentions · avg pos 12

first pick 0%

CHATGPT 14.3%PERPLEXITY 4.8%
Claim
32
Ubuntu

ubuntu.com

3.6%

95% CI 112.1%

2 mentions · avg pos 18

first pick 0%

GEMINI 9.5%
Claim
33
MariaDB

mariadb.org

3.6%

95% CI 112.1%

2 mentions · avg pos 27

first pick 0%

GEMINI 4.8%CHATGPT 14.3%
Claim
34
Cal.com

cal.com

3.6%

95% CI 112.1%

2 mentions · avg pos 64

first pick 0%

CHATGPT 28.6%
Claim
35
Breezy

breezy.hr

3.6%

95% CI 112.1%

2 mentions

first pick 0%

GEMINI 4.8%PERPLEXITY 4.8%
Claim
36
Breezy HR

breezyhr.com

3.6%

95% CI 112.1%

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 112.1%

2 mentions

first pick 0%

PERPLEXITY 9.5%
Claim
38
OpenAlternative

openalternative.co

3.6%

95% CI 112.1%

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 112.1%

2 mentions

first pick 0%

PERPLEXITY 9.5%
Claim
40
ERPNext HRMS

1.8%

95% CI 0.39.4%

1 mentions · avg pos 3

first pick 0%

PERPLEXITY 4.8%
Claim
41
Baserow

baserow.io

1.8%

95% CI 0.39.4%

1 mentions · avg pos 6

first pick 0%

GEMINI 4.8%
Claim
42
MintHCM

minthcm.org

1.8%

95% CI 0.39.4%

1 mentions · avg pos 7

first pick 0%

GEMINI 4.8%
Claim
43
JobSync

1.8%

95% CI 0.39.4%

1 mentions · avg pos 12

first pick 0%

PERPLEXITY 4.8%
Claim
44
DigitalOcean

digitalocean.com

1.8%

95% CI 0.39.4%

1 mentions · avg pos 17

first pick 0%

CHATGPT 14.3%
Claim
45
Apache Tika

1.8%

95% CI 0.39.4%

1 mentions · avg pos 69

first pick 0%

CHATGPT 14.3%
Claim
46
Workday

workday.com

1.8%

95% CI 0.39.4%

1 mentions · avg pos 71

first pick 0%

CHATGPT 14.3%
Claim
47
BambooHR

bamboohr.com

1.8%

95% CI 0.39.4%

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 0.39.4%

1 mentions

first pick 0%

PERPLEXITY 4.8%
Claim
49
Dev.to

dev.to

1.8%

95% CI 0.39.4%

1 mentions

first pick 0%

PERPLEXITY 4.8%
Claim
50
FedRAMP

fedramp.gov

1.8%

95% CI 0.39.4%

1 mentions

first pick 0%

CHATGPT 14.3%
Claim
51
Goodfirms

goodfirms.co

1.8%

95% CI 0.39.4%

1 mentions

first pick 0%

PERPLEXITY 4.8%
Claim
52
Gusto

gusto.com

1.8%

95% CI 0.39.4%

1 mentions

first pick 0%

PERPLEXITY 4.8%
Claim
53
Jobberbase

1.8%

95% CI 0.39.4%

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 0.39.4%

1 mentions

first pick 0%

PERPLEXITY 4.8%
Claim
55
Metaview

metaview.ai

1.8%

95% CI 0.39.4%

1 mentions

first pick 0%

PERPLEXITY 4.8%
Claim
56
SmartRecruiters

smartrecruiters.com

1.8%

95% CI 0.39.4%

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 0.39.4%

1 mentions

first pick 0%

PERPLEXITY 4.8%
Claim
58
Zoho

zoho.com

1.8%

95% CI 0.39.4%

1 mentions

first pick 0%

GEMINI 4.8%
Claim
59
iCIMS

icims.com

1.8%

95% CI 0.39.4%

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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