Overview Leaderboard Methodology
Industry Report

API Testing Tools

Software solutions that automate functional, performance, and security testing of APIs through scripting, mocking, and validation features.

Brands tracked: 30
Brands analyzed: 30
Last updated: 2026-04-22
Model: OpenAI GPT-5
Prompts: 245
Total responses: 1,225
Top Brand Overall?
Postman
98/100

Highest overall AI Visibility Score in this industry.

LBA Leader?
Burp Suite
98

Highest score on the LBA metric in this industry.

Authority Leader?
Postman
100

Highest score on the Authority metric in this industry.

TOM Leader?
Postman
100

Highest score on the TOM metric in this industry.

Postman is the default answer in AI responses for API Testing Tools

When users ask ChatGPT, Claude, or Gemini about API Testing Tools, Postman is the brand that surfaces first - unprompted, consistently, and usually at the top of any list the model generates. Insomnia is a close second, but the gap between them is meaningful. If you're competing in this space and you're not in the top handful, you're effectively invisible to AI-driven discovery.

Brand Leaderboard All 30 API Testing Tools brands ranked

Ranked by overall AI Visibility Score (smoothed geometric mean of LBA, Authority, and TOM with an LBA-based floor on Authority and TOM, see methodology). Click any brand for the full report.

# Brand LBA Authority TOM Overall
1
Postman
postman.com
 94
100
100
98
2
Insomnia
insomnia.rest
 73
47
80
65
3
Hoppscotch
hoppscotch.io
 67
26
44
43
4
SoapUI
soapui.org
 77
12
76
43
5
Rest Assured
rest-assured.io
 82
13
54
40
6
Katalon
katalon.com
 71
7
51
32
7
Pact
pact.io
 68
9
18
24
8
Burp Suite
portswigger.net
 98
10
10
23
9
Bruno
usebruno.com
 26
22
19
22
10
Paw
paw.cloud
 52
5
28
22
11
Parasoft SOAtest
parasoft.com
 79
8
8
19
12
WireMock
wiremock.io
 77
8
8
19
13
Stoplight
stoplight.io
 74
7
7
18
14
BlazeMeter
blazemeter.com
 70
7
7
17
15
Karate Labs
karatelabs.io
 68
7
7
17
16
Microcks
microcks.io
 68
7
7
17
17
Mockoon
mockoon.com
 69
7
7
17
18
Tricentis Tosca
tricentis.com
 71
7
7
17
19
42Crunch
42crunch.com
 59
6
6
15
20
Apache
apache.org
 46
5
12
15
21
Apifox
apifox.com
 59
6
6
15
22
Beeceptor
beeceptor.com
 61
6
6
15
23
Assertible
assertible.com
 53
5
5
13
24
M
Mountebank
mountebank.io
 50
5
5
13
25
Keploy
keploy.io
 45
4
4
12
26
Hoverfly
hoverfly.io
 39
4
4
10
27
HttpMaster
httpmaster.net
 35
3
3
9
28
Step CI
stepci.com
 23
2
2
6
29
Collaborator
smartbear.com
 15
2
2
4
30
Testfully
testfully.io
 9
1
1
3

How is this calculated? Methodology

Every brand in this leaderboard is scored against the same set of 245 shared API Testing Tools prompts. The same prompts, same model, same iterations. So differences in scores reflect actual differences in AI visibility, not differences in measurement.

Overall AI Visibility Score
Smoothed geometric mean of LBA, Authority and TOM. Authority and TOM are floored at LBA × 0.1 before the geometric mean (the same floor used in the per-metric cards above, so brand cards and the composite tell the same story). Formula: composite = ((LBA + 5)(Authority + 5)(TOM + 5))^(1/3) - 5. The floor keeps brands the model clearly recognises but doesn't yet recommend from collapsing to zero, while a single genuinely weak metric still pulls the composite down. Full methodology.
Shared industry prompts
For Authority and TOM, all brands in the industry are scored against the same 245 category prompts (e.g. "best SEO tools for agencies"). This makes brand-to-brand comparisons valid - everyone faces identical inputs. LBA prompts are per-brand because they ask brand-specific questions.
Latent Brand Association (LBA)
5 brand probes + 1 control prompt, each run 5 times in recall mode (no web search). LBA = quality × meta × stability × share × recognition × 100. Read the full LBA methodology →
LLM Authority
50 organic category prompts (discovery, comparison, problem and transactional intents), each run once in recall mode and once in retrieval mode. Score = frequency × log-decayed prominence × intent weight, then 50/50 averaged across the two modes. Read the full Authority methodology →
Top of Mind (TOM)
15 high-volume discovery prompts (sourced from Keywords Everywhere search-volume data), each run 5 times in pure recall mode (no web). Score = frequency × (0.5 + 0.5 × log-prominence), volume-weighted. Read the full TOM methodology →