Mercor is a marketplace of individual role listings you apply to, screened by a short AI interview. DataAnnotation is a single platform you enter through one written test, then pick projects from a dashboard. Most Mercor listings on the day we checked were named expert roles, while DataAnnotation has a general track as well as specialist ones.
Every fact below comes from each platform's own pages, read on 2026-10-13, plus recent threads in r/mercor_ai and r/DataAnnotationTech. DigiNo earns a referral if you join Mercor through our links, so we have kept its problems in here too. We have no link with DataAnnotation.
Mercor vs DataAnnotation Side by Side
| Mercor | DataAnnotation | |
|---|---|---|
| Signing up | Email link or Google, no password; browse roles before you make an account | Apply, choose a track, take the Starter Assessment |
| Main screen | Role-specific AI interview, most about 20 minutes, with a free practice run | One written Starter Assessment, about an hour; specialized ones take one to two |
| Second chances | Up to three interview retakes; most other assessments allow one submission | No retakes |
| What you need | A computer with a camera and microphone; no Firefox or mobile browsers | Fluent English and reliable internet |
| Shape of the work | Separate listings, project-based or one-time, some hourly and some per task | Projects by track on your dashboard, depending on demand and your past work |
| Payday | Every Wednesday for the previous week, through Stripe or Wise | Through PayPal, a few days after you request it |
| Identity check | Stripe checks identity when you set up payouts | Persona, with a photo ID and a selfie |
Sources: Mercor account FAQ, 2026-10-13, Mercor AI interview, 2026-10-13, Mercor assessments, 2026-10-13, Mercor payments, 2026-10-13, Mercor job listings, 2026-10-13, DataAnnotation FAQ, 2026-10-13.
How You Get In
On Mercor, each listing has its own steps. Most include an AI interview of about 20 minutes, done once and reused for other roles that need the same interview. A practice interview does not count against you. Passing an assessment can make you eligible for several roles, sometimes without a separate application.
On DataAnnotation, you get one shot. You choose a track, take a Starter Assessment and wait for an email, which it says arrives within a few days if you pass. Our guide to the DataAnnotation assessment covers the format and how to prepare.
Sources: Mercor AI interview, 2026-10-13, Mercor assessments, 2026-10-13, DataAnnotation FAQ, 2026-10-13.
Listed Pay on Each Platform
Both platforms publish rates. These are what the listings and FAQ stated on the day we checked, not what anyone will earn.
| Listing on Mercor | Listed at |
|---|---|
| Generalist (must own a MacBook) | $50-$60 per hour |
| Forensic or Toxicological Chemist | $65-$75 per task |
| Analytical Chemist | $65-$75 per task |
| Track on DataAnnotation | Listed at |
|---|---|
| General | Starting at $25-$50 per hour |
| Coding | Starting at $40-$150+ per hour |
| STEM | Starting at $40-$125+ per hour |
| Professional (law, finance, medicine) | Starting at $40-$125+ per hour |
| Multilingual | Starting at $25-$40 per hour |
Mercor contracts are in US dollars, and Stripe or Wise converts them to your currency. Stripe holds your first Mercor payout for seven days, after which the Wednesday schedule applies.
Sources: Mercor job listings, 2026-10-13, Mercor payments, 2026-10-13, DataAnnotation FAQ, 2026-10-13.
What Trainers on Reddit Report
Mercor
- Projects get paused while a batch is reviewed. Some resume, and some people are offboarded.
- A few contributors say hours were deducted from their pay after they were offboarded, with little explanation.
- Experienced professionals praise the pay on some projects but complain about inconsistent reviewers and shifting targets.
Sources: r/mercor_ai thread, r/mercor_ai thread, r/mercor_ai thread.
DataAnnotation
- Many applicants never hear back, and long-time members say silence after about two weeks usually means no.
- Qualifications and projects can drop off a dashboard when demand changes.
Sources: r/DataAnnotationTech thread, r/DataAnnotationTech thread, r/DataAnnotationTech thread.
For more on DataAnnotation, read our review: is DataAnnotation legit.
Which One Fits You
- Choose Mercor if you have a professional background and want to apply to specific roles, with a retake if the interview goes badly.
- Choose DataAnnotation if you want a general track, can give one written test your full attention, and prefer picking projects yourself.
- Apply to both if you qualify. Their screens are different, so failing one says little about the other.
Ethos is a third option for professionals. It matches you to client projects that include calls, surveys, written reports, and review and annotation, and you can decline any project without a penalty.
Sources: Ethos expert terms, 2026-10-13.
Find AI Training Work That Fits You
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Not sure which fits? The AI Training Job Matcher asks two questions and points you to our top pick. You can also compare Outlier vs DataAnnotation.
DigiNo earns a referral if you join Mercor, Ethos or micro1 through our links. It costs you nothing and does not change your pay.
Mercor vs DataAnnotation FAQ
Is Mercor or DataAnnotation better?
It depends on your background. Mercor suits professionals applying to specific roles through an AI interview. DataAnnotation has a general track and one written test with no retakes. Many people apply to both.
Which pays more, Mercor or DataAnnotation?
Both publish rates. Mercor shows a rate on each listing, some hourly and some per task. DataAnnotation lists starting rates by track in its FAQ. Listed rates are not earnings, and hours depend on the project.
How do Mercor and DataAnnotation pay you?
Mercor pays hourly contractors every Wednesday for the previous week through Stripe or Wise. DataAnnotation pays through PayPal a few days after you request a payout.
Can I retake the Mercor interview or the DataAnnotation test?
Mercor lets you retake an AI interview up to three times, though most of its other assessments allow one submission. DataAnnotation's Starter Assessment has no retakes.
Outlier vs DataAnnotation: Which Platform Fits You