Why does TheirStack show fewer jobs for a technology?
The TheirStack help pages give 3 common reasons. The first to rule out: TheirStack learns which technologies a company uses from its job postings, as its docs explain, so when a company posts fewer jobs, fewer mentions of a technology can appear.
What causes it?
TheirStack learns which technologies a company uses from its job postings, as its docs explain, so when a company posts fewer jobs, fewer mentions of a technology can appear.
In the TheirStack help:
We source our tech usage data from job postings.
How we source tech stack data, read 2026-11-12.A company can use a technology its job posts never name, as TheirStack's docs point out, so the count of jobs mentioning it can be low even for a real user.
In the TheirStack help:
A technology that is not mentioned is not a technology that is absent
How we source tech stack data, read 2026-11-12.Technology figures carry over the gaps of the job sources behind them, as TheirStack's docs say, so they can be thinner wherever its job coverage is thinner.
In the TheirStack help:
Technographic coverage therefore inherits every bias of our job data sources and adds one of its own.
How we source tech stack data, read 2026-11-12.
How do I check it myself?
Look at the last date a company's jobs mentioned the technology to see whether mentions have stopped or are only fewer.
In the TheirStack help:
Last date found - when a job by the company mentioned the technology for the last time
How we source tech stack data, read 2026-11-12.Open the jobs linked from a technology's job count to read the postings behind the number.
In the TheirStack help:
N. jobs mentioned - number of jobs mentioning this technology, with link to those jobs.
How we source tech stack data, read 2026-11-12.
How does TheirStack work with Feder?
- Connect TheirStack to Feder and it joins your Interest apps.
- When you connect TheirStack, Feder checks the connection straight away and shows Connected only when that check passes. If a reading cannot be taken later, Feder shows it as not read, never as zero.
Some numbers are too quiet to judge daily, such as a form filled in a few times a week. Until there is enough of your own history to judge a change, Feder says it is still learning and scores nothing, rather than guessing.
See whether you can trust the numbers in TheirStack, one of your Interest apps. Feder only reads. It never changes anything in TheirStack.
What else goes wrong with these numbers?
- Why did my TheirStack company count change after filtering?TheirStack
- Why did a company's open jobs drop in TheirStack?TheirStack
- Why did Google Analytics stop collecting data?Google Analytics
- Why aren't my key events showing in Google Analytics?Google Analytics
- Why does Google Analytics show (not set)?Google Analytics
See every question.
Where do these answers come from?
Every cause and check on this page comes from the TheirStack help pages, quoted above with the date we read them. Last reviewed 2026-11-12. We read them again by 2027-11-12. If one changes, this page changes or comes down.