We found 9,240 companies that use Fiddler. 2,211 of them name it in their own job posts, and the rest through employees' public profiles. Its share of job posts is shrinking, though 1,480 job posts still named it from October 2025 to August 2026. QA teams are its most common home.
Which companies name Fiddler in the most job posts?
Microsoft, EPAM Systems and Cognizant mention Fiddler in the most job posts. Of the five companies in the table, Microsoft has the most employees who list it on their profiles: 225.
CompanyPostsPeopleRecent job post
MicrosoftScientific and Technical Services · first seen Jul 2022299225
"Familiarity with tools: PowerShell, Netmon, Fiddler, CLI (command-line interfaces)"Technical Support Engineer - Azure Cloud, Sep 17, 2026
EPAM SystemsProfessional Services · first seen Aug 2022290216
"Experience with sniffing tools (Wireshark, Charles, Fiddler)"Senior Performance Analyst, Sep 7, 2026
CognizantProfessional Services · first seen Jul 2022144174
"Utilize Fiddler and similar tools to capture and analyze HTTP traffic ensuring accurate test scripting protocol handling and defect triage."Performance Analyst, Oct 22, 2026
DocusignScientific and Technical Services · first seen Dec 20221316
"Experience with system monitoring (Prometheus, Grafana, Datadog) and ML monitoring frameworks (Evidently, Arize, or Fiddler)"Machine Learning Engineer, Oct 23, 2026
LuxoftProfessional Services · first seen Jun 202312212
"Dev Tool: Fiddler, Postman and Swagger"Software Support Engineer, Mar 22, 2026
Job posts mentioning Fiddler went from 0.78 to 0.66 in every 10,000 job posts, comparing March to May with June to August 2026. Its busiest month was November 2025, at 0.94.
Show the data
Month
Job posts naming Fiddler
All job posts
Per 10,000
Oct 2025
98
1,413,673
0.69
Nov 2025
171
1,822,119
0.94
Dec 2025
105
1,236,103
0.85
Jan 2026
158
1,828,002
0.86
Feb 2026
161
1,856,647
0.87
Mar 2026
161
1,850,711
0.87
Apr 2026
129
1,728,886
0.75
May 2026
130
1,821,509
0.71
Jun 2026
142
1,909,496
0.74
Jul 2026
113
1,815,180
0.62
Aug 2026
112
1,835,698
0.61
How many companies named Fiddler in a job post for the first time in recent months?
In the three months to August 2026, 56 companies posted about Fiddler for the first time. From March to May, 65 did. From October 2025 to August 2026, 202 companies named it in a job post for the first time.
March to May 202665
June to August 202656
October 2025 to August 2026202
Companies whose first job post naming it appeared in that period. Recruiters, staffing firms and job boards are left out.
How do we know which companies use Fiddler?
Most of these companies come from employees' profiles: 76% have no job post naming Fiddler. 2,211 name it in their own job posts.
How we knowCompaniesShare
Job posts name Fiddler
2,21124%
Employees' profiles list Fiddler
7,02976%
9,240 companies. Each is counted once, under the strongest evidence we have for it.
What size are the companies that use Fiddler?
The largest group of Fiddler users is companies with 50 to 999 employees (46%), more than on the typical tech page. The second-largest group is companies with fewer than 50 employees, at 20%.
Share of its companies
Typical tech page
ShareTypical
Under 50 employees
20%22%
50 to 999
46%38%
1,000 to 5,000
18%17%
Over 5,000
15%23%
Where are Fiddler companies based?
The United States and the United Kingdom have the most Fiddler companies, at 46% and 6.6%. Germany is less common than usual, at 2.4% against 4.4% on the typical tech page.
ShareTypical
United States
46%43%
United Kingdom
6.6%6.4%
India
5.4%6.9%
Canada
4.1%3.6%
Germany
2.4%4.4%
Israel
2.3%0.36%
Companies in 111 countries and territories. Shares are of companies with a known headquarters country.
Show the data
Country
Companies
Share
Typical tech page
United States
4,092
46%
43%
United Kingdom
577
6.6%
6.4%
India
476
5.4%
6.9%
Canada
363
4.1%
3.6%
Germany
213
2.4%
4.4%
Israel
199
2.3%
0.36%
Which teams work with Fiddler?
At 51 companies, the team named in Fiddler job posts is QA, at least twice the next. IT and technology teams come next, at 21 and 18 companies.
TeamCompanies
QA
51
IT
21
Technology
18
Engineering
12
Development
11
R&D
10
What else do Fiddler companies use?
Chrome DevTools, Locust and XCUITest show up far more often at Fiddler companies than at companies of the same size. Couchbase comes fourth, 13 times as common as usual, at 7.1%.
Share of the 1,327 Fiddler companies counted here whose job posts also name the tool
Typical for companies the same size
Which companies started naming Fiddler in job posts recently?
From April to August 2026, 77 companies with 50 or more employees posted their first job naming Fiddler: 45 commercial, 19 mid-market and 13 enterprise. Among the new commercial companies, OASYS, INC. posted the most jobs naming it: 8.
Companies that named Fiddler in a job post for the first time between April and August 2026, ranked by their job posts in those months. AI-native companies get a group of their own, whatever their size. Recruiters and job boards are left out.
Which roles mention Fiddler most?
Fiddler shows up across many roles. The top one, Software Development Engineer in Test, has 26% of the job posts. The top four roles cover 49% of these job posts.
RoleSharePosts
Software Development Engineer in Test
26%387
Software Engineer
11%158
Customer Engineer
7%104
IT Support
4.9%72
Test Engineer
3.3%49
Quality Engineer
3.2%47
Show the data
Role
Share
Oct 2025 to Aug 2026
Mar to May 2026
Jun to Aug 2026
Software Development Engineer in Test
26%
387
100
75
Software Engineer
11%
158
47
46
Customer Engineer
7%
104
27
28
IT Support
4.9%
72
24
19
Test Engineer
3.3%
49
16
12
Quality Engineer
3.2%
47
19
7
Which project themes come up in Fiddler job posts?
Apart from broad digital transformation work, Microservices Migration comes up most in job posts naming Fiddler, in 60 of them. After that comes Data Infrastructure Migration, with 56.
Project themeJob posts
Digital Transformation404
Microservices Migration60
Data Infrastructure Migration56
Cloud Cost Optimization46
About this data
Sumble built this page. Sumble gives sales, marketing and other GTM teams technographics and hiring signals for the companies they sell to: the technologies each company uses, which teams are hiring and for what, and who reports to whom. That helps a team know who to contact, why now, and what to say.
Sumble covers more than 3.6 million companies, 93 million job posts collected since 2022 and 194 million employee profiles, and tracks more than 37,000 technologies. It finds which technologies a company uses by reading its job posts and its employees' public profiles.
Sumble has a free plan, and the same data is available through its API and MCP server.
A company counts when its own job posts or its employees' public profiles name the technology. Hiring is that technology's share of all job posts collected each month. Quotes are copied word for word from the companies' job posts.
Every figure on this page comes from Sumble's own analysis, and you won't find it outside Sumble.
