AI Training Vendor Health

Method and definitions

The public job boards of the AI training platforms this site tracks, read every day since 3 Aug 2026. Listings only: applicant activity on this site is never published per platform. Every figure is computed by one database query over the window shown, the same query for the live report and for every edition. Each figure states its sample beneath it.

Coverage

The platforms whose public job boards AITraining.jobs reads in full every day. Each figure states how many were read.

Open role

A role listed by a given day and still in its platform's feed that day.

New listing

A role that first appeared during the period on a platform already tracked before that week. A platform's first week in this dataset is its back catalogue and is not counted as new.

Removed listing

A role that left its platform's feed during the period.

Net flow

New listings minus removed listings, both outside re-key batches.

Like-for-like change

A platform's open roles at the end of the window against its open roles at the start, for platforms tracked before the window opened. A platform first read during the window is marked and never counted as growth. The start is restated by the net of any re-key batch in the window.

Status

Growing: a like-for-like change of +10% or more. Shrinking: -10% or less. Steady: in between. Too few roles: fewer than 10 open roles at both the start and the end, so no direction is read. First read in window: the platform joined this dataset during the window.

Re-key batch

A single UTC day holding at least 40% of a platform's removals and 40% of its new listings in a period (the report's window, or a calendar month of the last 26 weeks, from 3 Aug 2026 at the earliest), with at least 10 of each. Ordinary hiring arrives and leaves over many days; one read moving most of both is a change in how a board is identified (new identifiers, or a re-reading of the board by this dataset), so the batch is set aside from new listings, removals, net flow and the status, and listed with how many arrivals repeat a departing title.

Advertised pay

The hourly figure a posting states (the middle of a stated range). A platform's median of open roles needs at least 8 roles stating a rate.

Rate-change log

The median advertised hourly rate of a platform's new listings in each calendar month, shown where it has at least 5 new listings stating a rate. Back-catalogue roles and re-key batches are left out.

Same-work change

For each kind of work with at least 5 priced new listings in both the first and the last month with a median, the change in its median, averaged with the later month's listings as weights. Raised at +10% or more, Cut at -10% or less, Held between; Not comparable when no kind qualifies or the kinds compared hold under half of the later month's priced listings. For the whole market the same work is the same kind of work on the same platform.

Entered or left a kind of work

Entered: no open role in the kind at the start of the period (for a platform first read during it, none in its back catalogue) and at least one new listing in it during the period. Left: open roles in the kind at the start and none at the end.

Kind of work

Each role is classified from its title and description into one of the kinds of AI training work this site tracks, from AI evaluation and coding to multilingual and audio work. Every kind links to its own page.

Window

Live: the last 28 complete days, in UTC, with the weekly, monthly and kind-of-work figures read over the 26 weeks to the same end (from 3 Aug 2026 at the earliest). Edition: one calendar month, with those figures read over the 26 weeks to the month's end (from 3 Aug 2026 at the earliest).

What this data cannot tell you

• Platforms that recruit without a public job board are not counted. Several large ones invite workers to projects directly.
• A listing is not a hire. Some platforms keep evergreen roles open for months, and some post one listing per language or country, so a platform posting per language can grow its listings faster than its hiring.
• Open roles at the start and the end are counts on two days: a platform that opens and closes roles in large batches can change status from one window to the next.
• A re-key batch is recognised by its shape, not by its cause. A platform that genuinely closed most of its roles and opened as many others on the same day would be set aside too; every batch is listed with its counts so a reader can judge.
• Rates are what postings advertise, not what workers are paid after tiers, bonuses or rejected tasks. A month's median of 5 to 7 listings moves with a few postings, and the same-work comparison covers only the kinds of work a platform listed often enough in both months.
• A role's kind of work is its classification today, so a change in this site's classification can move roles between kinds.

How the job feeds are read and roles are classified: site methodology. How fresh, complete and consistent the data is, checked every day: data quality and coverage.

Editions

The live report covers the last 28 complete days and changes every day. Each complete month is also published as an edition, frozen two days after the month ends, so a figure you cite from an edition never moves.

• Live dataLast 28 complete days, recomputed daily
• September 2026 editionFrozen 11 Oct 2026
• August 2026 editionFrozen 11 Oct 2026

Cite and reuse

Free to quote, chart and republish under CC BY 4.0 with a link to this page. Live figures change daily: cite a monthly edition for numbers that will read the same later, or keep the access date.

@misc{aitrainingjobs_vendor_health_panel_live,
  author = {{AITraining.jobs}},
  title = {AI Training Vendor Health (live data, 20 Sep 2026 to 17 Oct 2026)},
  year = {2026},
  howpublished = {\url{https://www.aitraining.team/research/vendor-health-panel}},
  note = {Accessed 18 Oct 2026},
}

More research

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• AI Training Market ConcentrationHow many platforms compete for each kind of AI training work, and how much of it does the leader hold?Read the report
• How Long AI Training Roles Stay OpenHow long do AI training roles stay listed, and which kinds of work turn over fastest?Read the report
• When AI Training Roles Are PostedWhen are AI training roles posted, and when do people apply?Read the report
• Where AI Labs Are Pushing: The Expertise Being Hired, Week by WeekWhich kinds of expertise are AI training platforms hiring more of, week by week?Read the report
• The State of AI Training PayWhat does AI training work pay, by kind of work and by platform?Read the report

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