React Testing Library VS Vitest
As of 30 October 2026, Vitest is named by 360 companies and React Testing Library by 335; React Testing Library skews to companies under 200 people (57% vs 56%), Vitest to companies over 1,000 (23% vs 20%).
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: React Testing Library's script and mail records show on hundreds of thousands of small sites, Vitest rarely leaves a trace outside its own apps. Compare on the job-posting numbers; use the footprint for reach.
- React Testing Library: 2–200 employees
- 57%
- Vitest: 2–200 employees
- 56%
- React Testing Library: 1,000+ employees
- 20%
- Vitest: 1,000+ employees
- 23%
- Postings per company, 90 days
- 2.1 · 1.8
- 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 | React Testing Library | share | Vitest | share | Leans |
|---|---|---|---|---|---|
| Self-employed | 5 | 1% | 7 | 2% | even |
| 2-10 employees | 41 | 12% | 35 | 10% | React Testing Library |
| 11-50 employees | 75 | 22% | 72 | 20% | React Testing Library |
| 51-200 employees | 75 | 22% | 94 | 26% | Vitest |
| 201-500 employees | 48 | 14% | 41 | 11% | React Testing Library |
| 501-1000 employees | 23 | 7% | 30 | 8% | even |
| 1001-5000 employees | 41 | 12% | 45 | 13% | even |
| 5001-10000 employees | 7 | 2% | 12 | 3% | even |
| 10,001+ employees | 20 | 6% | 24 | 7% | even |
| Segment | React Testing Library | share | Vitest | share | Leans |
|---|---|---|---|---|---|
| Technology & software | 204 | 61% | 206 | 57% | React Testing Library |
| Business & finance services | 65 | 19% | 64 | 18% | even |
| Manufacturing & industry | 18 | 5% | 15 | 4% | even |
| Commerce & trade | 15 | 4% | 12 | 3% | even |
| Media & content | 10 | 3% | 13 | 4% | even |
| Consumer services & leisure | 7 | 2% | 11 | 3% | even |
| Health care | 4 | 1% | 11 | 3% | even |
| Transport, logistics & rental | 4 | 1% | 3 | 1% | even |
| Utilities & infrastructure | 3 | 1% | – | – | outside top 12 |
| Automotive | 2 | 1% | 6 | 2% | even |
| Public, community & associations | 2 | 1% | 3 | 1% | even |
| Hospitality & travel | 1 | 0% | 6 | 2% | even |
| Property & construction | – | – | 5 | 1% | outside top 12 |
| Segment | React Testing Library | share | Vitest | share | Leans |
|---|---|---|---|---|---|
| United States | 192 | 57% | 182 | 51% | React Testing Library |
| United Kingdom | 35 | 10% | 27 | 8% | React Testing Library |
| India | 22 | 7% | 6 | 2% | React Testing Library |
| Germany | 10 | 3% | 32 | 9% | Vitest |
| Canada | 9 | 3% | 10 | 3% | even |
| France | 8 | 2% | 18 | 5% | Vitest |
| Australia | 5 | 1% | – | – | outside top 12 |
| Poland | 5 | 1% | 8 | 2% | even |
| Singapore | 5 | 1% | – | – | outside top 12 |
| Lithuania | 4 | 1% | – | – | outside top 12 |
| United Arab Emirates | 3 | 1% | – | – | outside top 12 |
| Brazil | 3 | 1% | – | – | outside top 12 |
| Netherlands | – | – | 12 | 3% | outside top 12 |
| Switzerland | – | – | 7 | 2% | outside top 12 |
| Italy | – | – | 6 | 2% | outside top 12 |
| Japan | – | – | 6 | 2% | outside top 12 |
| Sweden | – | – | 6 | 2% | outside top 12 |
| Segment | React Testing Library | share | Vitest | share | Leans |
|---|---|---|---|---|---|
| Software engineering | 891 | 94% | 739 | 90% | React Testing Library |
| Engineering (non-software) | 9 | 1% | 6 | 1% | even |
| IT operations & business systems | 8 | 1% | 7 | 1% | even |
| Data & AI | 4 | 0% | 14 | 2% | even |
| Customer service & success | 2 | 0% | – | – | outside top 12 |
| Design & UX | 1 | 0% | – | – | outside top 12 |
| Quality, safety & environment | 1 | 0% | 4 | 0% | even |
| Sales | 1 | 0% | – | – | outside top 12 |
| Unclassified | 1 | 0% | – | – | outside top 12 |
| General management & consulting | – | – | 1 | 0% | outside top 12 |
| Product, program & project management | – | – | 1 | 0% | outside top 12 |
The companies behind each column
Companies using React Testing Library →
Companies using Vitest →
unit testing frameworks ranked →
Quote the sentence with the date and the link. The numbers change daily; the link always shows the current ones.
Vitest is named by 360 companies in job postings and React Testing Library by 335; 85 name both. (Breaknorm, 30 October 2026, https://breaknorm.co/compare/react-testing-library-vs-vitest)
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.
React Testing Library vs Vitest: questions
Which is more used, React Testing Library or Vitest?
By companies naming it in their own job postings, Vitest (360) over React Testing Library (335). By website-and-DNS footprint, Vitest (0 vs 0), because its scripts and mail records sit on many small company sites.
Who chooses React Testing Library?
57% of React Testing Library companies have 2 to 200 employees, against 56% for Vitest. 20% of React Testing Library companies have over 1,000 employees, against 23% for Vitest.
Do companies run both?
85 companies name both in their postings, usually React Testing Library in marketing and Vitest 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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