AI Index / Open-source survey tools

Best Open-source survey tools

What AI assistants actually recommend when buyers ask about open-source survey tools — 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 open-source survey tools?

Across 56 sampled AI answers from 4 engines, LimeSurvey is recommended most often — appearing in 92.9% of recommendations, followed by Formbricks (83.9%) and SurveyJS (64.3%).

This is a measurement of share of voice across 4 AI engines — not an editorial pick. See the full ranking below.

#ProductShareTrendEngines
1
LimeSurvey

limesurvey.org

92.9%

95% CI 8397.2%

52 mentions · avg pos 2.7

first pick 55.8%

GEMINI 85.7%CHATGPT 100%CLAUDE 85.7%PERPLEXITY 100%
Claim
2
Formbricks

formbricks.com

Best for: AI recommends Formbricks most when buyers ask best open-source survey tool I can self-host for collecting user feedback (100% of those answers)

83.9%

95% CI 72.291.3%

47 mentions · avg pos 5.5

first pick 14.9%

GEMINI 85.7%CHATGPT 85.7%CLAUDE 71.4%PERPLEXITY 85.7%
Claim
3
SurveyJS

surveyjs.io

Best for: AI recommends SurveyJS most when buyers ask how do I deploy a self-hosted survey tool that supports conditional logic and response exports (100% of those answers)

64.3%

95% CI 51.275.5%

36 mentions · avg pos 6.5

first pick 0%

GEMINI 71.4%CHATGPT 42.9%CLAUDE 71.4%PERPLEXITY 61.9%
Claim
4
Docker

docker.com

Best for: AI recommends Docker most when buyers ask best open-source survey tool I can self-host for collecting user feedback (100% of those answers)

57.1%

95% CI 44.169.2%

32 mentions · avg pos 7.2

first pick 6.3%

GEMINI 61.9%CHATGPT 57.1%CLAUDE 57.1%PERPLEXITY 52.4%
Claim
5
OpnForm

opnform.com

Best for: AI recommends OpnForm most when buyers ask open-source survey alternatives to expensive hosted survey platforms with per-response limits (62.5% of those answers)

26.8%

95% CI 1739.6%

15 mentions · avg pos 7.1

first pick 0%

GEMINI 42.9%CHATGPT 28.6%CLAUDE 28.6%PERPLEXITY 9.5%
Claim
6
PHP

php.net

Best for: AI recommends PHP most when buyers ask how do I deploy a self-hosted survey tool that supports conditional logic and response exports (62.5% of those answers)

21.4%

95% CI 12.733.8%

12 mentions · avg pos 4.2

first pick 41.7%

GEMINI 28.6%CHATGPT 14.3%CLAUDE 42.9%PERPLEXITY 9.5%
Claim
7
Typeform

typeform.com

Best for: AI recommends Typeform most when buyers ask open-source survey alternatives to expensive hosted survey platforms with per-response limits (87.5% of those answers)

21.4%

95% CI 12.733.8%

12 mentions · avg pos 6.3

first pick 25%

GEMINI 19%CHATGPT 28.6%CLAUDE 28.6%PERPLEXITY 19%
Claim
8
PostgreSQL

postgresql.org

Best for: AI recommends PostgreSQL most when buyers ask how do I deploy a self-hosted survey tool that supports conditional logic and response exports (50% of those answers)

19.6%

95% CI 11.331.8%

11 mentions · avg pos 14.2

first pick 9.1%

GEMINI 14.3%CHATGPT 42.9%CLAUDE 14.3%PERPLEXITY 19%
Claim
9
MySQL

mysql.com

Best for: AI recommends MySQL most when buyers ask how do I deploy a self-hosted survey tool that supports conditional logic and response exports (62.5% of those answers)

17.9%

95% CI 1029.8%

10 mentions · avg pos 13.7

first pick 40%

GEMINI 19%CHATGPT 42.9%CLAUDE 28.6%PERPLEXITY 4.8%
Claim
10
SurveyMonkey

surveymonkey.com

Best for: AI recommends SurveyMonkey most when buyers ask open-source survey alternatives to expensive hosted survey platforms with per-response limits (75% of those answers)

17.9%

95% CI 1029.8%

10 mentions · avg pos 15.6

first pick 30%

GEMINI 14.3%CHATGPT 42.9%CLAUDE 14.3%PERPLEXITY 14.3%
Claim
11
OhMyForm

Best for: AI recommends OhMyForm most when buyers ask lightweight self-hosted survey tools for a nonprofit that needs unlimited responses on a budget (37.5% of those answers)

16.1%

95% CI 8.727.8%

9 mentions · avg pos 18.5

first pick 0%

GEMINI 23.8%CHATGPT 42.9%PERPLEXITY 4.8%
Claim
12
Qualtrics

qualtrics.com

Best for: AI recommends Qualtrics most when buyers ask open-source survey alternatives to expensive hosted survey platforms with per-response limits (62.5% of those answers)

14.3%

95% CI 7.425.7%

8 mentions · avg pos 29.7

first pick 25%

CHATGPT 42.9%PERPLEXITY 23.8%
Claim
13
Nextcloud

nextcloud.com

Best for: AI recommends Nextcloud most when buyers ask open-source survey alternatives to expensive hosted survey platforms with per-response limits (50% of those answers)

12.5%

95% CI 6.223.6%

7 mentions · avg pos 27

first pick 0%

GEMINI 9.5%CHATGPT 28.6%CLAUDE 14.3%PERPLEXITY 9.5%
Claim
14
Nextcloud Forms

Best for: AI recommends Nextcloud Forms most when buyers ask open-source survey alternatives to expensive hosted survey platforms with per-response limits (50% of those answers)

10.7%

95% CI 521.5%

6 mentions · avg pos 20.3

first pick 0%

GEMINI 9.5%CHATGPT 14.3%CLAUDE 14.3%PERPLEXITY 9.5%
Claim
15
Google Forms

Best for: AI recommends Google Forms most when buyers ask lightweight self-hosted survey tools for a nonprofit that needs unlimited responses on a budget (37.5% of those answers)

10.7%

95% CI 521.5%

6 mentions · avg pos 25.3

first pick 0%

CHATGPT 42.9%CLAUDE 14.3%PERPLEXITY 9.5%
Claim
16
NGINX

nginx.org

Best for: AI recommends NGINX most when buyers ask how do I deploy a self-hosted survey tool that supports conditional logic and response exports (75% of those answers)

10.7%

95% CI 521.5%

6 mentions · avg pos 34.2

first pick 0%

GEMINI 4.8%CHATGPT 28.6%CLAUDE 14.3%PERPLEXITY 9.5%
Claim
17
REDCap

Best for: AI recommends REDCap most when buyers ask what open-source survey software should I use for academic research with full data ownership (37.5% of those answers)

8.9%

95% CI 3.919.3%

5 mentions · avg pos 35.3

first pick 0%

GEMINI 4.8%CHATGPT 57.1%
Claim
18
Surveydown

Best for: AI recommends Surveydown most when buyers ask what open-source survey software should I use for academic research with full data ownership (37.5% of those answers)

5.4%

95% CI 1.814.6%

3 mentions · avg pos 2

first pick 0%

PERPLEXITY 14.3%
Claim
19
Zapier AI

zapier.com

Best for: AI recommends Zapier AI most when buyers ask open-source survey alternatives to expensive hosted survey platforms with per-response limits (50% of those answers)

5.4%

95% CI 1.814.6%

3 mentions · avg pos 2

first pick 0%

GEMINI 4.8%PERPLEXITY 9.5%
Claim
20
SoGoSurvey

sogolytics.com

Best for: AI recommends SoGoSurvey most when buyers ask lightweight self-hosted survey tools for a nonprofit that needs unlimited responses on a budget (50% of those answers)

5.4%

95% CI 1.814.6%

3 mentions · avg pos 3

first pick 0%

CLAUDE 14.3%PERPLEXITY 9.5%
Claim
21
Checkbox

5.4%

95% CI 1.814.6%

3 mentions · avg pos 4.3

first pick 0%

GEMINI 4.8%PERPLEXITY 9.5%
Claim
22
Open Data Kit

odk.org

Best for: AI recommends Open Data Kit most when buyers ask what open-source survey software should I use for academic research with full data ownership (37.5% of those answers)

5.4%

95% CI 1.814.6%

3 mentions · avg pos 4.5

first pick 0%

GEMINI 4.8%CHATGPT 14.3%PERPLEXITY 4.8%
Claim
23
Typebot

5.4%

95% CI 1.814.6%

3 mentions · avg pos 5

first pick 0%

GEMINI 9.5%PERPLEXITY 4.8%
Claim
24
HeyForm

5.4%

95% CI 1.814.6%

3 mentions · avg pos 27

first pick 0%

CHATGPT 28.6%PERPLEXITY 4.8%
Claim
25
GuideFlow

guideflow.com

Best for: AI recommends GuideFlow most when buyers ask best self-hosted survey platform for an enterprise that can't send response data to third parties (50% of those answers)

5.4%

95% CI 1.814.6%

3 mentions

first pick 0%

PERPLEXITY 14.3%
Claim
26
SurveyPlanet

surveyplanet.com

5.4%

95% CI 1.814.6%

3 mentions

first pick 0%

PERPLEXITY 14.3%
Claim
27
Slack

slack.com

3.6%

95% CI 112.1%

2 mentions · avg pos 2.5

first pick 0%

GEMINI 9.5%
Claim
28
Apache Hop

apache.org

Best for: AI recommends Apache Hop most when buyers ask how do I deploy a self-hosted survey tool that supports conditional logic and response exports (62.5% of those answers)

3.6%

95% CI 112.1%

2 mentions · avg pos 10

first pick 50%

GEMINI 4.8%PERPLEXITY 4.8%
Claim
29
Endatix

3.6%

95% CI 112.1%

2 mentions · avg pos 10.5

first pick 0%

GEMINI 9.5%
Claim
30
Yakforms

3.6%

95% CI 112.1%

2 mentions · avg pos 20

first pick 50%

CHATGPT 14.3%CLAUDE 14.3%
Claim
31
Let's Encrypt

letsencrypt.org

3.6%

95% CI 112.1%

2 mentions · avg pos 33

first pick 0%

CHATGPT 14.3%CLAUDE 14.3%
Claim
32
OpenAlternative

openalternative.co

Best for: AI recommends OpenAlternative most when buyers ask open-source survey alternatives to expensive hosted survey platforms with per-response limits (50% of those answers)

3.6%

95% CI 112.1%

2 mentions · avg pos 38

first pick 0%

CHATGPT 14.3%PERPLEXITY 4.8%
Claim
33
Google Sites

sites.google.com

Best for: AI recommends Google Sites most when buyers ask open-source survey alternatives to expensive hosted survey platforms with per-response limits (37.5% of those answers)

3.6%

95% CI 112.1%

2 mentions

first pick 0%

PERPLEXITY 9.5%
Claim
34
SourceForge

sourceforge.net

Best for: AI recommends SourceForge most when buyers ask open-source survey alternatives to expensive hosted survey platforms with per-response limits (37.5% of those answers)

3.6%

95% CI 112.1%

2 mentions

first pick 0%

PERPLEXITY 9.5%
Claim
35
Formtools

formtools.org

1.8%

95% CI 0.39.4%

1 mentions · avg pos 2

first pick 0%

GEMINI 4.8%
Claim
36
Maian Survey

1.8%

95% CI 0.39.4%

1 mentions · avg pos 3

first pick 0%

PERPLEXITY 4.8%
Claim
37
Quackback

quackback.io

1.8%

95% CI 0.39.4%

1 mentions · avg pos 3

first pick 0%

GEMINI 4.8%
Claim
38
Surveyr

1.8%

95% CI 0.39.4%

1 mentions · avg pos 6

first pick 0%

GEMINI 4.8%
Claim
39
BlockSurvey

blocksurvey.io

1.8%

95% CI 0.39.4%

1 mentions · avg pos 13

first pick 0%

GEMINI 4.8%
Claim
40
Railway

railway.app

1.8%

95% CI 0.39.4%

1 mentions · avg pos 27

first pick 0%

CHATGPT 14.3%
Claim
41
Alchemer

alchemer.com

1.8%

95% CI 0.39.4%

1 mentions · avg pos 53

first pick 0%

CHATGPT 14.3%
Claim
42
SurveyMonkey Enterprise

Best for: AI recommends SurveyMonkey Enterprise most when buyers ask self-hosted open-source survey tool vs hosted survey SaaS for a healthcare organization (37.5% of those answers)

1.8%

95% CI 0.39.4%

1 mentions · avg pos 54

first pick 0%

CHATGPT 14.3%
Claim
43
QuestionPro

questionpro.com

1.8%

95% CI 0.39.4%

1 mentions · avg pos 55

first pick 0%

CHATGPT 14.3%
Claim
44
Jotform

jotform.com

Best for: AI recommends Jotform most when buyers ask self-hosted open-source survey tool vs hosted survey SaaS for a healthcare organization (37.5% of those answers)

1.8%

95% CI 0.39.4%

1 mentions

first pick 0%

PERPLEXITY 4.8%
Claim
45
ODK Central

1.8%

95% CI 0.39.4%

1 mentions

first pick 0%

CLAUDE 14.3%
Claim
46
PrivacyTools.io

privacytools.io

Best for: AI recommends PrivacyTools.io most when buyers ask how do I deploy a self-hosted survey tool that supports conditional logic and response exports (37.5% of those answers)

1.8%

95% CI 0.39.4%

1 mentions

first pick 0%

PERPLEXITY 4.8%
Claim
47
ProProfs Survey Maker

proprofssurvey.com

1.8%

95% CI 0.39.4%

1 mentions

first pick 0%

PERPLEXITY 4.8%
Claim
48
SurveyKing

surveyking.com

1.8%

95% CI 0.39.4%

1 mentions

first pick 0%

PERPLEXITY 4.8%
Claim
49
Userflow

userflow.com

Best for: AI recommends Userflow most when buyers ask lightweight self-hosted survey tools for a nonprofit that needs unlimited responses on a budget (37.5% of those answers)

1.8%

95% CI 0.39.4%

1 mentions

first pick 0%

PERPLEXITY 4.8%
Claim
50
involve.me

involve.me

1.8%

95% CI 0.39.4%

1 mentions

first pick 0%

PERPLEXITY 4.8%
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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