Why did my TheirStack company count change after filtering?

The TheirStack help pages give 3 common reasons. The first to rule out: Excluding an industry also removes companies with no known industry, as TheirStack's docs explain, so a company count can fall by more than that one industry.

What causes it?

  1. Excluding an industry also removes companies with no known industry, as TheirStack's docs explain, so a company count can fall by more than that one industry.

    In the TheirStack help: When you exclude an industry, those unknown-industry companies are dropped too, not just the ones in the excluded industry. Company Type, read 2026-11-12.

  2. The label that separates recruiting agencies from direct employers is a best estimate, as TheirStack's docs say, so a count filtered by it can include a few agencies or leave out a few employers.

    In the TheirStack help: Because it's a best-effort heuristic, it isn't perfect: some agencies are missed and a few direct employers may be flagged. Company Type, read 2026-11-12.

  3. Many recruiting firms do not list themselves under the staffing industry, as TheirStack's docs note, so excluding that industry alone can leave agencies in a company count.

    In the TheirStack help: A lot of recruiting and staffing firms don't label themselves as "Staffing and Recruiting" on LinkedIn. Company Type, read 2026-11-12.

How do I check it myself?

  1. If a search is already limited to direct employers, check that the staffing industry is not also excluded, as TheirStack's docs advise, since excluding an industry drops companies with no known industry too.

    In the TheirStack help: If you are already filtering by company type = direct employer, do not also exclude the Staffing and Recruiting industry. Company Type, read 2026-11-12.

  2. Before comparing a saved search's count with an earlier one, look for TheirStack's notice that its filters have changed.

    In the TheirStack help: A banner appears indicating your filters have changed Saved Searches, 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.

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.

Know the day a number breaks, not the month after.