Shipvane · 4 AE roles
Marco E. · joined Cargolio
Fleetora · first roles in DECompanies using OR-Tools_
As of 4 November 2026, 84 companies name OR-Tools in their own job postings; it leaves no trace on websites or in DNS.
As of 4 November 2026 · refreshed daily · counts move as websites, DNS and career sites are re-read.
- Largest market
- –
- Companies with 51+ staff
- –
- Top industry
- –
- Team that names it most
- Data & AI · 95 postings
- Hiring on it, last 30 days
- 75 companies
- Most often alongside
- Gurobi · 93 companies
Where OR-Tools shows up
Each population is counted on its own. We never add them up without saying so, because they answer different questions.
Companies whose own pages load OR-Tools's scripts or embeds, or whose domain's mail and hosting records (SPF, DKIM, MX, CNAME) point at OR-Tools. From our crawl of 41.5M company websites and the DNS sweep behind it. Reach: the tool is in the building.
Companies whose own postings say the team works in OR-Tools. Read hourly from ~70 applicant tracking systems, with the function, a quote and a date. Intent: the team that runs it is hiring.
Companies in the footprint whose postings also name OR-Tools. The rest of the posting population (84) runs OR-Tools without a public trace on the site or in DNS, which is where job data earns its place.
Companies on OR-Tools
Companies with 51+ employees and at least medium-confidence evidence in their own postings; job boards and portals left out.
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Who runs OR-Tools inside the company
The 84 companies whose postings name OR-Tools: by country, size and the function of the role. The second number in the function table is companies.
| postings · companies | |
|---|---|
| Data & AI | 95 · 74 |
| Software engineering | 19 · 16 |
| Engineering (non-software) | 5 · 3 |
| research and science | 5 · 4 |
| IT operations & business systems | 2 · 2 |
| logistics warehouse and transport | 2 · 1 |
| General management & consulting | 1 · 1 |
| companies | share | |
|---|---|---|
| United States | 47 | 56% |
| Germany | 4 | 5% |
| Canada | 3 | 4% |
| Spain | 3 | 4% |
| France | 3 | 4% |
| Brazil | 2 | 2% |
| United Kingdom | 2 | 2% |
| Türkiye | 2 | 2% |
| Austria | 1 | 1% |
| Australia | 1 | 1% |
| China | 1 | 1% |
| Czechia | 1 | 1% |
| companies | share | |
|---|---|---|
| Self-employed | 1 | 1% |
| 2-10 employees | 7 | 8% |
| 11-50 employees | 9 | 11% |
| 51-200 employees | 15 | 18% |
| 201-500 employees | 4 | 5% |
| 501-1000 employees | 17 | 20% |
| 1001-5000 employees | 10 | 12% |
| 5001-10000 employees | 5 | 6% |
| 10,001+ employees | 16 | 19% |
| postings | |
|---|---|
| Postings, last 30 days | 107 |
| Postings, last 90 days | 143 |
| All open postings | 181 |
75 companies opened a role that names OR-Tools in the last 30 days. A hiring team that names its tools is the moment to write to the person who owns the stack.
What OR-Tools teams also ask for
Tools named in the same postings as OR-Tools. Office software is left out.
OR-Tools against the rest of its category
Ranked by companies naming each tool in postings. Whole category →
Quote the sentence with the date and the link. The numbers change daily; the link always shows the current ones.
84 companies name OR-Tools in their own job postings; it leaves no trace on websites or in DNS, so the posting layer is the whole picture. (Breaknorm, 4 November 2026, https://breaknorm.co/tools/or-tools)
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 →
- Website codeScripts, tags and embeds found on the company's own pages in our crawl of 41.5M sites. A tool counts once per company.
- DNS recordsSPF includes, DKIM selectors, MX and CNAME records of the company's domain that point at OR-Tools or another vendor. Swept in cycles; dedicated mail-provider and hosting facets open once coverage passes 80% per country.
- Job postingsRead hourly from the applicant tracking systems behind company career sites. A tool counts when the employer's own text names it as the team's system; candidate wish-lists and apply boilerplate are excluded. Confidence low, medium or high per company.
- Sending infrastructureCold-e-mail sending domains are look-alike domains on a provider's infrastructure (DNS records, certificate logs) that redirect to the company. Absence is not evidence: only companies with a found sending domain are counted.
- CompaniesCountry, size and industry come from the company profile we build from its website; headcount from LinkedIn where known, otherwise estimated. Job boards, portals and aggregators are kept out of lists.
OR-Tools data: questions
How many companies use OR-Tools?
84 as of 4 November 2026: 0 carry OR-Tools on their website or in their DNS records and 84 name it in their own job postings; 0 show up in both. We keep the two counts apart because they measure different things.
What does "website or DNS" mean?
Our crawler finds OR-Tools's scripts, embeds and tags on the company's own pages, and our DNS sweep reads the domain's mail and hosting records (SPF includes, DKIM selectors, MX, CNAMEs) that point at OR-Tools. Either one puts the company in the footprint. The sweep is still running, so this number grows week by week.
Why is the job-posting number so much smaller?
A posting only names a tool when the team that will use it is hiring and chooses to say so. That makes it a smaller but stronger signal: it tells you which team runs OR-Tools, with a quote and a date. The footprint tells you reach.
How fresh is this?
Career sites are read hourly, websites are re-crawled on a rolling schedule and DNS is re-swept in cycles. The date at the top is when these counts were computed.
Can I get the list?
Yes. The first 20 are on this page; the full 84 with verified e-mails and a weekly feed of new OR-Tools users is in the product. Counting is free.
Get this list your way
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Every company on OR-Tools,
with the person who owns it
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