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Compare AI training platforms, head to head

Deciding between two platforms? Each comparison lays out real hourly pay, how hard each is to join, the work it hires for, how it pays out, and how many roles are open right now, so you can pick the one worth your time. All 86 platforms also have their own full review.

Ordered by what applying to their platforms is worth, lifted by a referral boost for a platform that pays us a referral fee; it never changes what a platform pays you.

Outlier (Scale AI) vs DataAnnotation

Up to $7–$50/hr; ML, EE and quant finance up to $150/hr · $25–$150+/hr; generalists $25–$50/hr

Outlier (Scale AI) vs Remotasks

Up to $7–$50/hr; ML, EE and quant finance up to $150/hr · Per task in its app; posted projects $9–$17/hr

Outlier (Scale AI) vs Mercor

Up to $7–$50/hr; ML, EE and quant finance up to $150/hr · $63–$90/hr median listing; experts to $450/hr

Outlier (Scale AI) vs Prolific

Up to $7–$50/hr; ML, EE and quant finance up to $150/hr · $8–$216+/hr

Outlier (Scale AI) vs Appen

Up to $7–$50/hr; ML, EE and quant finance up to $150/hr · $2.40–$100/hr; CrowdGen experts up to $450/hr

Outlier (Scale AI) vs Alignerr

Up to $7–$50/hr; ML, EE and quant finance up to $150/hr · $10–$200/hr (German voice actors to $280/hr)

Outlier (Scale AI) vs Clickworker

Up to $7–$50/hr; ML, EE and quant finance up to $150/hr · Per task, cents to tens of euros; no hourly rate

DataAnnotation vs Remotasks

$25–$150+/hr; generalists $25–$50/hr · Per task in its app; posted projects $9–$17/hr

DataAnnotation vs Mercor

$25–$150+/hr; generalists $25–$50/hr · $63–$90/hr median listing; experts to $450/hr

DataAnnotation vs Prolific

$25–$150+/hr; generalists $25–$50/hr · $8–$216+/hr

DataAnnotation vs Appen

$25–$150+/hr; generalists $25–$50/hr · $2.40–$100/hr; CrowdGen experts up to $450/hr

DataAnnotation vs Alignerr

$25–$150+/hr; generalists $25–$50/hr · $10–$200/hr (German voice actors to $280/hr)

DataAnnotation vs Clickworker

$25–$150+/hr; generalists $25–$50/hr · Per task, cents to tens of euros; no hourly rate

Remotasks vs Mercor

Per task in its app; posted projects $9–$17/hr · $63–$90/hr median listing; experts to $450/hr

Remotasks vs Prolific

Per task in its app; posted projects $9–$17/hr · $8–$216+/hr

Remotasks vs Appen

Per task in its app; posted projects $9–$17/hr · $2.40–$100/hr; CrowdGen experts up to $450/hr

Remotasks vs Alignerr

Per task in its app; posted projects $9–$17/hr · $10–$200/hr (German voice actors to $280/hr)

Remotasks vs Clickworker

Per task in its app; posted projects $9–$17/hr · Per task, cents to tens of euros; no hourly rate

Mercor vs Prolific

$63–$90/hr median listing; experts to $450/hr · $8–$216+/hr

Mercor vs Appen

$63–$90/hr median listing; experts to $450/hr · $2.40–$100/hr; CrowdGen experts up to $450/hr

Mercor vs Alignerr

$63–$90/hr median listing; experts to $450/hr · $10–$200/hr (German voice actors to $280/hr)

Mercor vs Clickworker

$63–$90/hr median listing; experts to $450/hr · Per task, cents to tens of euros; no hourly rate

Prolific vs Appen

$8–$216+/hr · $2.40–$100/hr; CrowdGen experts up to $450/hr

Prolific vs Alignerr

$8–$216+/hr · $10–$200/hr (German voice actors to $280/hr)

Prolific vs Clickworker

$8–$216+/hr · Per task, cents to tens of euros; no hourly rate

Appen vs Alignerr

$2.40–$100/hr; CrowdGen experts up to $450/hr · $10–$200/hr (German voice actors to $280/hr)

Appen vs Clickworker

$2.40–$100/hr; CrowdGen experts up to $450/hr · Per task, cents to tens of euros; no hourly rate

Alignerr vs Clickworker

$10–$200/hr (German voice actors to $280/hr) · Per task, cents to tens of euros; no hourly rate

micro1 vs Mercor

$50–$90/hr median post; senior legal and research experts to $400/hr · $63–$90/hr median listing; experts to $450/hr

micro1 vs Outlier (Scale AI)

$50–$90/hr median post; senior legal and research experts to $400/hr · Up to $7–$50/hr; ML, EE and quant finance up to $150/hr

micro1 vs AfterQuery

$50–$90/hr median post; senior legal and research experts to $400/hr · $15–$175/hr; middle half $50–$104/hr

AfterQuery vs Mercor

$15–$175/hr; middle half $50–$104/hr · $63–$90/hr median listing; experts to $450/hr

AfterQuery vs Handshake AI

$15–$175/hr; middle half $50–$104/hr · $15–$150/hr; physicians and surgeons to $300/hr

AfterQuery vs Alignerr

$15–$175/hr; middle half $50–$104/hr · $10–$200/hr (German voice actors to $280/hr)

OpenTrain AI vs micro1

$6–$50/hr on its own postings (top $60) · $50–$90/hr median post; senior legal and research experts to $400/hr

OpenTrain AI vs Outlier (Scale AI)

$6–$50/hr on its own postings (top $60) · Up to $7–$50/hr; ML, EE and quant finance up to $150/hr

OpenTrain AI vs Alignerr

$6–$50/hr on its own postings (top $60) · $10–$200/hr (German voice actors to $280/hr)

Handshake AI vs Mercor

$15–$150/hr; physicians and surgeons to $300/hr · $63–$90/hr median listing; experts to $450/hr

Handshake AI vs Outlier (Scale AI)

$15–$150/hr; physicians and surgeons to $300/hr · Up to $7–$50/hr; ML, EE and quant finance up to $150/hr

Handshake AI vs Alignerr

$15–$150/hr; physicians and surgeons to $300/hr · $10–$200/hr (German voice actors to $280/hr)

xAI (SpaceXAI) vs Outlier (Scale AI)

$35–$100/hr (US) · Up to $7–$50/hr; ML, EE and quant finance up to $150/hr

xAI (SpaceXAI) vs DataAnnotation

$35–$100/hr (US) · $25–$150+/hr; generalists $25–$50/hr

xAI (SpaceXAI) vs micro1

$35–$100/hr (US) · $50–$90/hr median post; senior legal and research experts to $400/hr

xAI (SpaceXAI) vs OpenTrain AI

$35–$100/hr (US) · $6–$50/hr on its own postings (top $60)

Terac vs Mercor

$40–$350/hr expert; per task to $750; studies $1–$315 · $63–$90/hr median listing; experts to $450/hr

Terac vs Prolific

$40–$350/hr expert; per task to $750; studies $1–$315 · $8–$216+/hr

Terac vs micro1

$40–$350/hr expert; per task to $750; studies $1–$315 · $50–$90/hr median post; senior legal and research experts to $400/hr

Sigma AI vs Appen

Not stated; Madrid transcribers report ~€7–€9/hr (Glassdoor) · $2.40–$100/hr; CrowdGen experts up to $450/hr

Sigma AI vs TELUS Digital AI

Not stated; Madrid transcribers report ~€7–€9/hr (Glassdoor) · $18–$50/hr experts; linguists and evaluators $3.50–$25/hr

Sigma AI vs Clickworker

Not stated; Madrid transcribers report ~€7–€9/hr (Glassdoor) · Per task, cents to tens of euros; no hourly rate

Appen vs TELUS Digital AI

$2.40–$100/hr; CrowdGen experts up to $450/hr · $18–$50/hr experts; linguists and evaluators $3.50–$25/hr

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