We found 527 companies that use Tessy. 199 of them name it in their own job posts, and the rest through employees' public profiles. From October 2025 to August 2026, 113 job posts named it.
Syntronic - A Global Design House leads with 35 job posts naming Tessy, followed by UST and Intellias. Syntronic - A Global Design House is the newest of the five companies in the table, with its first job post naming it in November 2024.
CompanyPostsPeopleRecent job post
Syntronic - A Global Design HouseProfessional Services · first seen Nov 2024350
"该职位来源于猎聘 1.参与兆易创新MCAL测试项目、博格华纳单元集成测试项目、湘滨电子白盒测试 2.负责用例编写、用例执行、问题单整理、不直接与客户沟通 任职要求 1、熟悉C/C++，可以清晰的看懂C/C++语言逻辑； 2、有嵌入式开发或者测试经验 3、熟悉常见总线测试工具 4.熟悉QAC、TESSY、Gtest者优先"Assigned - Jingwei Hirain Software Test Engineer, Sep 8, 2026
USTProfessional Services · first seen Jul 2023342
"Knowledge of unit and integration testing tools such as Tessy, RTRT, and TPT"Developer III - Embedded Software, Sep 18, 2026
IntelliasProfessional Services · first seen Nov 2023275
"Contribute to unit and integration testing in embedded C using Tessy (or similar tools) — a strong plus"Senior Software Test Engineer, Sep 22, 2025
Ban Vien CorporationProfessional Services · first seen Apr 2024250
"Unit Testing (Tessy & RTRT), TPT & Integration Testing Tools."embedded system engineer, Sep 12, 2026
KOSTAL GroupScientific and Technical Services · first seen Jul 2023203
"Deseable Tessy, Polyspace, Jenkins."software testing engineer, Mar 22, 2025
From March to May 2026, 0.06 in every 10,000 job posts named Tessy; from June to August, 0.08 in every 10,000 job posts. One company accounts for most of that change.
Show the data
Month
Job posts naming Tessy
All job posts
Per 10,000
Oct 2025
5
1,413,673
0.04
Nov 2025
10
1,822,119
0.05
Dec 2025
7
1,236,103
0.06
Jan 2026
7
1,828,002
0.04
Feb 2026
9
1,856,647
0.05
Mar 2026
10
1,850,711
0.05
Apr 2026
11
1,728,886
0.06
May 2026
11
1,821,509
0.06
Jun 2026
13
1,909,496
0.07
Jul 2026
16
1,815,180
0.09
Aug 2026
14
1,835,698
0.08
How many companies named Tessy in a job post for the first time in recent months?
From June to August 2026, 9 companies posted their first job naming Tessy; 8 did from March to May. The 9 from June to August are 4.5% of all 199 companies whose job posts name it.
March to May 20268
June to August 20269
October 2025 to August 202625
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 Tessy?
199 companies name Tessy in job posts they wrote; employees' profiles add 328 more. 61 show up in both job posts and employees' profiles.
How we knowCompaniesShare
Job posts name Tessy
19938%
Employees' profiles list Tessy
32862%
527 companies. Each is counted once, under the strongest evidence we have for it.
What size are the companies that use Tessy?
Companies with 50 to 999 employees are the largest group of Tessy users, at 35%. 153 of its companies have more than 5,000 employees.
Share of its companies
Typical tech page
ShareTypical
Under 50 employees
17%22%
50 to 999
35%38%
1,000 to 5,000
19%17%
Over 5,000
29%23%
Where are Tessy companies based?
Sweden is 3 times as common among Tessy companies as on the typical tech page, at 3.1%. Germany leads overall with 27%. The United States is second, at 21%.
ShareTypical
Germany
27%4.4%
United States
21%43%
India
14%6.9%
France
5.5%4.6%
Spain
3.9%1.8%
Sweden
3.1%1%
Companies in 41 countries and territories. Shares are of companies with a known headquarters country.
Show the data
Country
Companies
Share
Typical tech page
Germany
138
27%
4.4%
United States
108
21%
43%
India
69
14%
6.9%
France
28
5.5%
4.6%
Spain
20
3.9%
1.8%
Sweden
16
3.1%
1%
What else do Tessy companies use?
Cantata, QAC and Polyspace show up far more often at Tessy companies than at companies of the same size. Among the tools listed here, VectorCast is the most widely used, at 28% of Tessy companies.
Share of the 114 Tessy companies counted here whose job posts also name the tool
Typical for companies the same size
Companies that named Tessy 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 Tessy most?
Embedded Engineer and Software Development Engineer in Test roles are tied as the most common, each in 24% of the job posts naming Tessy. The top four roles cover 65% of these job posts.
RoleSharePosts
Embedded Engineer
24%27
Software Development Engineer in Test
24%27
Firmware Engineer
8.8%10
Software Engineer
8.8%10
Site Reliability Engineer
3.5%4
Business Development
2.7%3
Show the data
Role
Share
Oct 2025 to Aug 2026
Mar to May 2026
Jun to Aug 2026
Embedded Engineer
24%
27
7
12
Software Development Engineer in Test
24%
27
8
9
Firmware Engineer
8.8%
10
4
3
Software Engineer
8.8%
10
3
2
Site Reliability Engineer
3.5%
4
3
1
Business Development
2.7%
3
0
1
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.
