AI training platforms compared: micro1, Mindrift, AfterQuery, Mercor and Outlier

Five platforms dominate the searches for this work: micro1, Mindrift (run by Toloka), AfterQuery, Mercor and Outlier (run by Scale AI). They are usually described as interchangeable. They are not — they differ on the one thing that determines what an hour of your time is worth, which is whether they buy your hours or your output.

The distinction that matters: hourly versus per-task

micro1, AfterQuery, Mercor and Outlier pay for time. Mindrift, by its own FAQ, pays "a clearly defined, fixed reward" per task, visible before you start. Those are not variants of one model, they are opposite risk positions:

• Hourly puts the risk of a slow, badly specified task on the platform. An hour of confusing guidelines is still a paid hour.

• Per-task puts it on you. A $15 task that takes three hours paid $5 an hour, and no advertised rate warned you.

Neither is dishonest, and per-task suits people who are fast in a narrow groove. But when you see a headline rate, check which of the two it describes before comparing it to anything.

What each platform publishes about itself

Everything in the table below is taken from the platform's own pages. Where a platform does not publish something, the cell says so rather than guessing — the gaps are informative in themselves.

How fast you get paid

Cadence is the second real difference, and it ranges over an order of magnitude: AfterQuery pays every Friday for the previous Monday-to-Sunday week, through Stripe, direct to a bank account in your own name. Outlier pays weekly. Mindrift pays on the 5th and the 20th, through Payoneer or Tipalti. micro1 pays biweekly into a platform wallet you then withdraw from. Mercor advertises daily payouts but does not publish the method.

If you are doing this to smooth a cash-flow gap rather than to build a second income, that column is the one to read first.

How hard each is to get into

Mindrift is the only one of the five with a genuinely open door: its FAQ describes an all-access tier where you register and start, with no application, alongside specialist projects that do need a CV and assessments. micro1 gates everything behind a 20–40 minute AI interview and a government-ID check, after which you are a certified expert eligible to be matched. Outlier describes a 30–90 minute onboarding — profile, ID, skill verification — and asks for undergraduate-level expertise as a floor, preferring postgraduate. AfterQuery and Mercor apply per role.

A reasonable reading: if you want to find out today whether you like the work at all, the open-tier route costs you nothing but an evening. If you have a specialism worth $90 an hour, spend the evening on the gated one instead.

What none of them will tell you

How much work you will actually be offered. Every platform in this table advertises rates; none advertises utilisation, and utilisation is what turns a rate into an income. Our own catalogue shows why it is unknowable in advance: the fields with the most openings are the lowest-paid ones, so the roles that are easiest to be accepted for are the ones where an hour is worth least, and the $90–$150 legal and research work has a few hundred seats worldwide.

Treat any figure of the form "earn $X per month" — including on the review sites that rank for these comparisons — as a rate multiplied by an invented number of hours.

Where these facts come from

Each platform's own public pages, read in August 2026: micro1, Mindrift's FAQ, AfterQuery's payments documentation, Mercor and Outlier. Terms change; where a platform revises a page, the platform is right and we are out of date.

Disclosure: JobsRadar has a referral arrangement with micro1 and earns a referral fee if you are hired through one of its listings. We have no arrangement with the other four, which is precisely why we sourced every cell from published pages rather than from our own inbox.

Browse the AI-training roles we currently list →

New roles land on our Telegram channel first: https://t.me/ai_training_jobs_radar