Karma VS Testcontainers
As of 30 October 2026, Testcontainers is named by 112 companies and Karma by 248; Karma skews to companies under 200 people (46% vs 41%), Testcontainers to companies over 1,000 (39% vs 30%).
As of 30 October 2026 · refreshed daily · counts move as websites, DNS and career sites are re-read.
The website-and-DNS footprint is not comparable between a marketing suite and a CRM: Karma's script and mail records show on hundreds of thousands of small sites, Testcontainers rarely leaves a trace outside its own apps. Compare on the job-posting numbers; use the footprint for reach.
- Karma: 2–200 employees
- 46%
- Testcontainers: 2–200 employees
- 41%
- Karma: 1,000+ employees
- 30%
- Testcontainers: 1,000+ employees
- 39%
- Postings per company, 90 days
- 2.6 · 2.6
- Website or DNS footprint
- 0 · 0
Who chooses which
Share of each tool's companies in every segment. "Leans" marks a gap of more than two points.
| Segment | Karma | share | Testcontainers | share | Leans |
|---|---|---|---|---|---|
| Self-employed | 4 | 2% | – | – | outside top 12 |
| 2-10 employees | 12 | 5% | 6 | 5% | even |
| 11-50 employees | 52 | 21% | 21 | 19% | Karma |
| 51-200 employees | 50 | 20% | 19 | 17% | Karma |
| 201-500 employees | 37 | 15% | 7 | 6% | Karma |
| 501-1000 employees | 19 | 8% | 15 | 13% | Testcontainers |
| 1001-5000 employees | 43 | 17% | 22 | 20% | Testcontainers |
| 5001-10000 employees | 9 | 4% | 5 | 4% | even |
| 10,001+ employees | 22 | 9% | 17 | 15% | Testcontainers |
| Segment | Karma | share | Testcontainers | share | Leans |
|---|---|---|---|---|---|
| Technology & software | 144 | 58% | 65 | 58% | even |
| Business & finance services | 50 | 20% | 25 | 22% | Testcontainers |
| Manufacturing & industry | 22 | 9% | 6 | 5% | Karma |
| Media & content | 10 | 4% | 2 | 2% | Karma |
| Consumer services & leisure | 5 | 2% | – | – | outside top 12 |
| Commerce & trade | 4 | 2% | 4 | 4% | even |
| Public, community & associations | 2 | 1% | 2 | 2% | even |
| Health care | 2 | 1% | – | – | outside top 12 |
| Hospitality & travel | 2 | 1% | – | – | outside top 12 |
| Property & construction | 2 | 1% | 1 | 1% | even |
| Transport, logistics & rental | 2 | 1% | 4 | 4% | Testcontainers |
| Utilities & infrastructure | 2 | 1% | 2 | 2% | even |
| Agriculture & forestry | – | – | 1 | 1% | outside top 12 |
| Segment | Karma | share | Testcontainers | share | Leans |
|---|---|---|---|---|---|
| United States | 134 | 54% | 47 | 42% | Karma |
| United Kingdom | 19 | 8% | 12 | 11% | Testcontainers |
| Germany | 15 | 6% | 8 | 7% | even |
| India | 15 | 6% | 2 | 2% | Karma |
| France | 12 | 5% | 8 | 7% | Testcontainers |
| Spain | 7 | 3% | 2 | 2% | even |
| Brazil | 4 | 2% | 3 | 3% | even |
| Canada | 4 | 2% | – | – | outside top 12 |
| Italy | 4 | 2% | – | – | outside top 12 |
| Romania | 4 | 2% | – | – | outside top 12 |
| Australia | 3 | 1% | 2 | 2% | even |
| Mexico | 3 | 1% | – | – | outside top 12 |
| Poland | – | – | 7 | 6% | outside top 12 |
| Sweden | – | – | 6 | 5% | outside top 12 |
| Denmark | – | – | 3 | 3% | outside top 12 |
| Belgium | – | – | 2 | 2% | outside top 12 |
| Segment | Karma | share | Testcontainers | share | Leans |
|---|---|---|---|---|---|
| Software engineering | 837 | 82% | 302 | 88% | Testcontainers |
| Sales | 43 | 4% | – | – | outside top 12 |
| General management & consulting | 23 | 2% | 2 | 1% | even |
| Design & UX | 15 | 1% | – | – | outside top 12 |
| IT operations & business systems | 9 | 1% | 2 | 1% | even |
| Marketing & communications | 9 | 1% | 1 | 0% | even |
| Retail & store operations | 8 | 1% | – | – | outside top 12 |
| Customer service & success | 6 | 1% | – | – | outside top 12 |
| Data & AI | 5 | 0% | 10 | 3% | Testcontainers |
| Arts media and entertainment | 2 | 0% | – | – | outside top 12 |
| Business development & strategy | 2 | 0% | – | – | outside top 12 |
| Engineering (non-software) | 2 | 0% | 2 | 1% | even |
| Quality, safety & environment | – | – | 3 | 1% | outside top 12 |
The companies behind each column
Companies using Karma →
Companies using Testcontainers →
unit testing frameworks ranked →
Quote the sentence with the date and the link. The numbers change daily; the link always shows the current ones.
Testcontainers is named by 112 companies in job postings and Karma by 248; 0 name both. (Breaknorm, 30 October 2026, https://breaknorm.co/compare/karma-test-runner-vs-testcontainers)
Read from the source, not self-reported
Every number on this page can be traced to a page we crawled or a posting we read. Full methodology →
- Job postingsRead hourly from career sites. A tool counts when the employer's own text names it as the team's system; both tools can count for one company.
- Website and DNSScripts and embeds on the company's pages, plus SPF, DKIM, MX and CNAME records of its domain that point at the vendor.
- SegmentsCountry, size and industry from the company profile built from its website.
- Not a reviewNo ratings, prices or feature claims. For those, read the vendors.
Karma vs Testcontainers: questions
Which is more used, Karma or Testcontainers?
By companies naming it in their own job postings, Karma (248) over Testcontainers (112). By website-and-DNS footprint, Testcontainers (0 vs 0), because its scripts and mail records sit on many small company sites.
Who chooses Karma?
46% of Karma companies have 2 to 200 employees, against 41% for Testcontainers. 30% of Karma companies have over 1,000 employees, against 39% for Testcontainers.
Do companies run both?
0 companies name both in their postings, usually Karma in marketing and Testcontainers in sales, or during a migration.
Where do these numbers come from?
From the employer's own text in job postings read hourly from career sites, and from scripts found on company websites in our crawl. No vendor data, no surveys.
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with the person who owns it
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