AI Index / Self-hosted scheduling and booking tools

Best Self-hosted scheduling and booking tools

What AI assistants actually recommend when buyers ask about self-hosted scheduling and booking 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 (32 answers)

What is the best self-hosted scheduling and booking tools?

Across 56 sampled AI answers from 4 engines, Cal.com is recommended most often — appearing in 78.6% of recommendations, followed by Easy!Appointments (69.6%) and Calendly (37.5%).

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

#ProductShareTrendEngines
1
Cal.com

cal.com

Best for: AI recommends Cal.com most when buyers ask best open-source appointment booking software I can run on my own server (100% of those answers)

78.6%

95% CI 66.287.3%

44 mentions · avg pos 4.1

first pick 47.7%

GEMINI 66.7%CHATGPT 100%CLAUDE 71.4%PERPLEXITY 85.7%
Claim
2
Easy!Appointments

easyappointments.org

Best for: AI recommends Easy!Appointments most when buyers ask best open-source appointment booking software I can run on my own server (100% of those answers)

69.6%

95% CI 56.780.1%

39 mentions · avg pos 5

first pick 15.4%

GEMINI 52.4%CHATGPT 100%CLAUDE 57.1%PERPLEXITY 81%
Claim
3
Calendly

calendly.com

Best for: AI recommends Calendly most when buyers ask open-source scheduling alternatives to popular hosted booking link platforms (87.5% of those answers)

37.5%

95% CI 2650.6%

21 mentions · avg pos 6.9

first pick 23.8%

GEMINI 33.3%CHATGPT 71.4%CLAUDE 28.6%PERPLEXITY 33.3%
Claim
4
Docker

docker.com

Best for: AI recommends Docker most when buyers ask how do I self-host a meeting scheduling app that syncs with Google or Outlook calendar (100% of those answers)

35.7%

95% CI 24.548.8%

20 mentions · avg pos 3.1

first pick 20%

GEMINI 28.6%CHATGPT 42.9%CLAUDE 28.6%PERPLEXITY 42.9%
Claim
5
LibreBooking

Best for: AI recommends LibreBooking most when buyers ask what open-source booking tool should I use for a multi-staff service business with resource management (100% of those answers)

32.1%

95% CI 21.445.2%

18 mentions · avg pos 3.5

first pick 22.2%

GEMINI 42.9%CHATGPT 14.3%CLAUDE 28.6%PERPLEXITY 28.6%
Claim
6
Cal.diy

Best for: AI recommends Cal.diy most when buyers ask best open-source appointment booking software I can run on my own server (62.5% of those answers)

32.1%

95% CI 21.445.2%

18 mentions · avg pos 5.4

first pick 33.3%

GEMINI 52.4%CHATGPT 28.6%PERPLEXITY 23.8%
Claim
7
MySQL

mysql.com

Best for: AI recommends MySQL most when buyers ask best open-source appointment booking software I can run on my own server (50% of those answers)

25%

95% CI 15.537.7%

14 mentions · avg pos 5.9

first pick 14.3%

GEMINI 23.8%CHATGPT 28.6%CLAUDE 14.3%PERPLEXITY 28.6%
Claim
8
Google Calendar

calendar.google.com

Best for: AI recommends Google Calendar most when buyers ask how do I self-host a meeting scheduling app that syncs with Google or Outlook calendar (62.5% of those answers)

21.4%

95% CI 12.733.8%

12 mentions · avg pos 4.4

first pick 25%

GEMINI 14.3%CHATGPT 71.4%CLAUDE 14.3%PERPLEXITY 14.3%
Claim
9
Rallly

Best for: AI recommends Rallly most when buyers ask open-source scheduling alternatives to popular hosted booking link platforms (87.5% of those answers)

21.4%

95% CI 12.733.8%

12 mentions · avg pos 5.8

first pick 0%

GEMINI 28.6%CHATGPT 14.3%CLAUDE 28.6%PERPLEXITY 14.3%
Claim
10
NGINX

nginx.org

Best for: AI recommends NGINX most when buyers ask how do I self-host a meeting scheduling app that syncs with Google or Outlook calendar (87.5% of those answers)

21.4%

95% CI 12.733.8%

12 mentions · avg pos 9.7

first pick 8.3%

GEMINI 23.8%CHATGPT 42.9%CLAUDE 14.3%PERPLEXITY 14.3%
Claim
11
Booked Scheduler

Best for: AI recommends Booked Scheduler most when buyers ask open-source scheduling alternatives to popular hosted booking link platforms (62.5% of those answers)

19.6%

95% CI 11.331.8%

11 mentions · avg pos 4.7

first pick 27.3%

GEMINI 23.8%CHATGPT 28.6%CLAUDE 14.3%PERPLEXITY 14.3%
Claim
12
Outlook

outlook.com

Best for: AI recommends Outlook most when buyers ask how do I self-host a meeting scheduling app that syncs with Google or Outlook calendar (100% of those answers)

19.6%

95% CI 11.331.8%

11 mentions · avg pos 4.9

first pick 9.1%

GEMINI 19%CHATGPT 42.9%CLAUDE 14.3%PERPLEXITY 14.3%
Claim
13
Doodle

doodle.com

Best for: AI recommends Doodle most when buyers ask open-source scheduling alternatives to popular hosted booking link platforms (87.5% of those answers)

16.1%

95% CI 8.727.8%

9 mentions · avg pos 5.1

first pick 0%

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

nextcloud.com

Best for: AI recommends Nextcloud most when buyers ask best self-hosted scheduling tool for a consultant who doesn't want calendar data in the cloud (37.5% of those answers)

16.1%

95% CI 8.727.8%

9 mentions · avg pos 9.1

first pick 0%

GEMINI 23.8%CHATGPT 42.9%PERPLEXITY 4.8%
Claim
15
PostgreSQL

postgresql.org

Best for: AI recommends PostgreSQL most when buyers ask how do I self-host a meeting scheduling app that syncs with Google or Outlook calendar (62.5% of those answers)

16.1%

95% CI 8.727.8%

9 mentions · avg pos 9.4

first pick 22.2%

GEMINI 23.8%CHATGPT 42.9%CLAUDE 14.3%
Claim
16
Nextcloud Calendar

Best for: AI recommends Nextcloud Calendar most when buyers ask best self-hosted scheduling tool for a consultant who doesn't want calendar data in the cloud (37.5% of those answers)

14.3%

95% CI 7.425.7%

8 mentions · avg pos 10.9

first pick 0%

GEMINI 23.8%CHATGPT 28.6%PERPLEXITY 4.8%
Claim
17
OpenEMR

openemr.org

Best for: AI recommends OpenEMR most when buyers ask self-hosted scheduling tool for a healthcare clinic that needs patient data on-premise (75% of those answers)

12.5%

95% CI 6.223.6%

7 mentions · avg pos 3.6

first pick 14.3%

GEMINI 14.3%CHATGPT 14.3%PERPLEXITY 14.3%
Claim
18
TimeTrex

timetrex.com

Best for: AI recommends TimeTrex most when buyers ask open-source scheduling alternatives to popular hosted booking link platforms (37.5% of those answers)

12.5%

95% CI 6.223.6%

7 mentions · avg pos 4

first pick 0%

GEMINI 14.3%PERPLEXITY 19%
Claim
19
Apache Hop

apache.org

Best for: AI recommends Apache Hop most when buyers ask how do I self-host a meeting scheduling app that syncs with Google or Outlook calendar (37.5% of those answers)

8.9%

95% CI 3.919.3%

5 mentions · avg pos 5.7

first pick 20%

GEMINI 14.3%PERPLEXITY 9.5%
Claim
20
Caddy

caddyserver.com

Best for: AI recommends Caddy most when buyers ask how do I self-host a meeting scheduling app that syncs with Google or Outlook calendar (50% of those answers)

8.9%

95% CI 3.919.3%

5 mentions · avg pos 13.8

first pick 0%

GEMINI 4.8%CHATGPT 28.6%CLAUDE 14.3%PERPLEXITY 4.8%
Claim
21
WordPress

wordpress.com

8.9%

95% CI 3.919.3%

5 mentions · avg pos 14.2

first pick 0%

CHATGPT 14.3%CLAUDE 28.6%PERPLEXITY 9.5%
Claim
22
TimeTrex Community Edition

Best for: AI recommends TimeTrex Community Edition most when buyers ask what open-source booking tool should I use for a multi-staff service business with resource management (37.5% of those answers)

7.1%

95% CI 2.817%

4 mentions · avg pos 2.8

first pick 0%

GEMINI 14.3%PERPLEXITY 4.8%
Claim
23
Jitsi

jitsi.org

Best for: AI recommends Jitsi most when buyers ask self-hosted scheduling tool for a healthcare clinic that needs patient data on-premise (37.5% of those answers)

7.1%

95% CI 2.817%

4 mentions · avg pos 4

first pick 75%

GEMINI 14.3%CHATGPT 14.3%
Claim
24
Jitsi Meet

jitsi.support

Best for: AI recommends Jitsi Meet most when buyers ask self-hosted scheduling tool for a healthcare clinic that needs patient data on-premise (37.5% of those answers)

7.1%

95% CI 2.817%

4 mentions · avg pos 5.5

first pick 75%

GEMINI 14.3%CHATGPT 14.3%
Claim
25
Google Cloud Console

console.cloud.google.com

Best for: AI recommends Google Cloud Console most when buyers ask how do I self-host a meeting scheduling app that syncs with Google or Outlook calendar (50% of those answers)

7.1%

95% CI 2.817%

4 mentions · avg pos 10.8

first pick 0%

GEMINI 9.5%CLAUDE 14.3%PERPLEXITY 4.8%
Claim
26
Let's Encrypt

letsencrypt.org

Best for: AI recommends Let's Encrypt most when buyers ask how do I self-host a meeting scheduling app that syncs with Google or Outlook calendar (50% of those answers)

7.1%

95% CI 2.817%

4 mentions · avg pos 11.5

first pick 0%

GEMINI 9.5%CHATGPT 14.3%CLAUDE 14.3%
Claim
27
Traefik

traefik.io

Best for: AI recommends Traefik most when buyers ask how do I self-host a meeting scheduling app that syncs with Google or Outlook calendar (37.5% of those answers)

7.1%

95% CI 2.817%

4 mentions · avg pos 13

first pick 0%

CHATGPT 28.6%CLAUDE 14.3%PERPLEXITY 4.8%
Claim
28
OpenCare

Best for: AI recommends OpenCare most when buyers ask self-hosted scheduling tool for a healthcare clinic that needs patient data on-premise (37.5% of those answers)

5.4%

95% CI 1.814.6%

3 mentions · avg pos 1

first pick 100%

GEMINI 14.3%
Claim
29
Node.js

nodejs.org

5.4%

95% CI 1.814.6%

3 mentions · avg pos 1.3

first pick 66.7%

GEMINI 9.5%CLAUDE 14.3%
Claim
30
Ottehr

ottehr.com

Best for: AI recommends Ottehr most when buyers ask self-hosted scheduling tool for a healthcare clinic that needs patient data on-premise (37.5% of those answers)

5.4%

95% CI 1.814.6%

3 mentions · avg pos 3.7

first pick 0%

GEMINI 14.3%
Claim
31
Bookafy

5.4%

95% CI 1.814.6%

3 mentions · avg pos 4

first pick 0%

GEMINI 9.5%PERPLEXITY 4.8%
Claim
32
Microsoft 365

Best for: AI recommends Microsoft 365 most when buyers ask how do I self-host a meeting scheduling app that syncs with Google or Outlook calendar (37.5% of those answers)

5.4%

95% CI 1.814.6%

3 mentions · avg pos 13.5

first pick 0%

CHATGPT 14.3%PERPLEXITY 9.5%
Claim
33
Tymeslot

5.4%

95% CI 1.814.6%

3 mentions · avg pos 14.7

first pick 0%

CHATGPT 28.6%PERPLEXITY 4.8%
Claim
34
ERPNext

erpnext.com

5.4%

95% CI 1.814.6%

3 mentions · avg pos 21.7

first pick 0%

GEMINI 4.8%CHATGPT 14.3%PERPLEXITY 4.8%
Claim
35
SourceForge

sourceforge.net

Best for: AI recommends SourceForge most when buyers ask open-source scheduling alternatives to popular hosted booking link platforms (37.5% of those answers)

5.4%

95% CI 1.814.6%

3 mentions

first pick 0%

PERPLEXITY 14.3%
Claim
36
dxcal

dxcal.com

Best for: AI recommends dxcal most when buyers ask self-hosted scheduling tool for a healthcare clinic that needs patient data on-premise (50% of those answers)

5.4%

95% CI 1.814.6%

3 mentions

first pick 0%

PERPLEXITY 14.3%
Claim
37
Zapier AI

zapier.com

3.6%

95% CI 112.1%

2 mentions · avg pos 1

first pick 50%

CLAUDE 14.3%PERPLEXITY 4.8%
Claim
38
OpenMRS

openmrs.org

3.6%

95% CI 112.1%

2 mentions · avg pos 3

first pick 0%

GEMINI 9.5%
Claim
39
Dkron

3.6%

95% CI 112.1%

2 mentions · avg pos 8

first pick 0%

PERPLEXITY 9.5%
Claim
40
Acuity

acuityscheduling.com

3.6%

95% CI 112.1%

2 mentions · avg pos 8.5

first pick 0%

CHATGPT 28.6%
Claim
41
SavvyCal

3.6%

95% CI 112.1%

2 mentions · avg pos 16

first pick 0%

CHATGPT 14.3%PERPLEXITY 4.8%
Claim
42
Goodfirms

goodfirms.co

Best for: AI recommends Goodfirms most when buyers ask best open-source appointment booking software I can run on my own server (37.5% of those answers)

3.6%

95% CI 112.1%

2 mentions

first pick 0%

PERPLEXITY 9.5%
Claim
43
Calendso

1.8%

95% CI 0.39.4%

1 mentions · avg pos 2

first pick 0%

CLAUDE 14.3%
Claim
44
Lunacal

lunacal.ai

1.8%

95% CI 0.39.4%

1 mentions · avg pos 3

first pick 0%

PERPLEXITY 4.8%
Claim
45
NextAppointments

nextappointments.net

1.8%

95% CI 0.39.4%

1 mentions · avg pos 3

first pick 0%

PERPLEXITY 4.8%
Claim
46
Apigee

cloud.google.com

1.8%

95% CI 0.39.4%

1 mentions · avg pos 5

first pick 0%

PERPLEXITY 4.8%
Claim
47
Microsoft Outlook

outlook.microsoft.com

1.8%

95% CI 0.39.4%

1 mentions · avg pos 5

first pick 0%

CHATGPT 14.3%
Claim
48
NGINX Proxy Manager

1.8%

95% CI 0.39.4%

1 mentions · avg pos 5

first pick 0%

CLAUDE 14.3%
Claim
49
NextGen Healthcare EHR

1.8%

95% CI 0.39.4%

1 mentions · avg pos 5

first pick 0%

GEMINI 4.8%
Claim
50
Odoo

odoo.com

1.8%

95% CI 0.39.4%

1 mentions · avg pos 6

first pick 0%

PERPLEXITY 4.8%
Claim
51
OpenAlternative

openalternative.co

1.8%

95% CI 0.39.4%

1 mentions · avg pos 8

first pick 0%

CHATGPT 14.3%
Claim
52
Baïkal

1.8%

95% CI 0.39.4%

1 mentions · avg pos 9

first pick 0%

CHATGPT 14.3%
Claim
53
Radicale

1.8%

95% CI 0.39.4%

1 mentions · avg pos 9

first pick 0%

CHATGPT 14.3%
Claim
54
MRBS

1.8%

95% CI 0.39.4%

1 mentions · avg pos 19

first pick 0%

GEMINI 4.8%
Claim
55
Agiled

agiled.app

1.8%

95% CI 0.39.4%

1 mentions

first pick 0%

PERPLEXITY 4.8%
Claim
56
Contabo

contabo.com

1.8%

95% CI 0.39.4%

1 mentions

first pick 0%

PERPLEXITY 4.8%
Claim
57
Dev.to

dev.to

Best for: AI recommends Dev.to most when buyers ask how do I self-host a meeting scheduling app that syncs with Google or Outlook calendar (37.5% of those answers)

1.8%

95% CI 0.39.4%

1 mentions

first pick 0%

PERPLEXITY 4.8%
Claim
58
F6S

f6s.com

Best for: AI recommends F6S most when buyers ask open-source scheduling alternatives to popular hosted booking link platforms (37.5% of those answers)

1.8%

95% CI 0.39.4%

1 mentions

first pick 0%

PERPLEXITY 4.8%
Claim
59
Google Workspace

workspace.google.com

Best for: AI recommends Google Workspace most when buyers ask how do I self-host a meeting scheduling app that syncs with Google or Outlook calendar (37.5% of those answers)

1.8%

95% CI 0.39.4%

1 mentions

first pick 0%

CHATGPT 14.3%
Claim
60
Koalendar

koalendar.com

Best for: AI recommends Koalendar most when buyers ask how do I self-host a meeting scheduling app that syncs with Google or Outlook calendar (37.5% of those answers)

1.8%

95% CI 0.39.4%

1 mentions

first pick 0%

PERPLEXITY 4.8%
Claim
61
Microsoft

microsoft.com

1.8%

95% CI 0.39.4%

1 mentions

first pick 0%

PERPLEXITY 4.8%
Claim
62
OmniMD

omnimd.com

Best for: AI recommends OmniMD most when buyers ask self-hosted scheduling tool for a healthcare clinic that needs patient data on-premise (37.5% of those answers)

1.8%

95% CI 0.39.4%

1 mentions

first pick 0%

PERPLEXITY 4.8%
Claim
63
Plutio

plutio.com

1.8%

95% CI 0.39.4%

1 mentions

first pick 0%

PERPLEXITY 4.8%
Claim
64
Postiz

postiz.com

1.8%

95% CI 0.39.4%

1 mentions

first pick 0%

PERPLEXITY 4.8%
Claim
65
Prosper AI

getprosper.ai

Best for: AI recommends Prosper AI most when buyers ask self-hosted scheduling tool for a healthcare clinic that needs patient data on-premise (37.5% of those answers)

1.8%

95% CI 0.39.4%

1 mentions

first pick 0%

PERPLEXITY 4.8%
Claim
66
Simply Set

simplyset.io

Best for: AI recommends Simply Set most when buyers ask best self-hosted scheduling tool for a consultant who doesn't want calendar data in the cloud (37.5% of those answers)

1.8%

95% CI 0.39.4%

1 mentions

first pick 0%

PERPLEXITY 4.8%
Claim
67
Softr

softr.io

1.8%

95% CI 0.39.4%

1 mentions

first pick 0%

PERPLEXITY 4.8%
Claim
68
The Digital Project Manager

thedigitalprojectmanager.com

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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