How we make this list: we compare pricing pages, product documentation and public user reviews. Ratings come from G2, Capterra or Trustpilot, with the date we checked them.
Key takeaways
- Alignerr and Mercor publish the clearest expert rates, with averages around $80 and $85 an hour in published reports.
- Outlier offers the most regular payday, with weekly payouts, and suits graduates who want a steady task queue.
- micro1 has the highest worker reviews in this group and suits specialists who prefer named contract roles.
- Prolific suits short paid studies alongside another job, with a published minimum hourly rate.
- No platform promises steady hours, so most experienced contractors hold two or three accounts to keep work coming.
Quick comparison
| Tool | Best for | Starting price | Free plan |
|---|
 Outlier | graduates who want a large, steady task queue | See website | Yes |
 Alignerr | experts who want a published rate | See website | Yes |
 Mercor | professionals in medicine, law, finance, and research | See website | Yes |
 micro1 | specialists who prefer named contract roles | See website | Yes |
 Prolific | short paid studies alongside another job | See website | Yes |
 Mindrift | flexible AI tasks from many countries | See website | Yes |
 OneForma | language and data tasks at scale | See website | Yes |
 Surge AI | frontier model data and expert evaluation | See website | Yes |
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The best dataannotation alternatives
#1
Outlier
Best for: graduates who want a large, steady task queue
Visit outlier.ai
Starting priceSee website
Free planYes
Outlier, run by Scale AI, is one of the largest platforms for AI training work. Contractors work on writing, coding, reasoning, and evaluation tasks that train and test AI models, and pay is shown per project before starting. Payouts run weekly by PayPal, Airtm, or bank transfer, which is the most regular payday in this group.
The task queue is large, which suits graduates and generalists who want steady work rather than waiting for rare expert projects. The trade-offs are familiar from worker reviews: pay varies by project, and accounts can be lost without a clear explanation. Treat Outlier as one account among several, not the only source of work, and keep records of completed tasks.
What we like- Weekly payouts
- Large task volume
- Work in many subjects
Watch out for- Pay varies by project
- Account loss without clear explanation is a common complaint
Starting priceSee website
Free planYes
Alignerr, from Labelbox, publishes the clearest rates in this group: a range of $40 to $120 an hour with an $80 average stated on its homepage. That transparency helps experts compare platforms without guessing, and weekly payouts keep cash flow predictable. The work covers training and evaluating AI models across subjects, with an emphasis on degree holders and specialists.
Screening is strict, and expert roles dominate, so generalists will find fewer open tasks than on Outlier. Worker reviews are strong, with a 4.5 rating across thousands of reviews in published comparisons. For an expert who wants a published rate and a professional setup, Alignerr is the first platform to check.
What we like- Published rate range
- Weekly payouts
- Labelbox backing
Watch out for- Screening is strict
- Expert roles dominate, so generalists have fewer options
#3
Mercor
Best for: professionals in medicine, law, finance, and research
Visit mercor.com
Starting priceSee website
Free planYes
Mercor hires experts in medicine, law, finance, engineering, and research to train and evaluate AI models, and it told TechCrunch in October 2025 that its experts average over $85 an hour, with more than $1.5 million paid per day. That rate level makes it the highest-paying platform in this group for specialists, and its growth has been fast.
The platform uses AI interviews plus expert rubric scoring in screening, which suits professionals who can demonstrate real expertise quickly. The trade-off is youth: processes are newer than those of older platforms, and generalists will find less work here. For a professional with scarce expertise, Mercor is worth applying to first, even if screening takes effort.
What we like- High average contracted rates
- Expert focus
- Fast growth
Watch out for- Young processes
- Screening favors specialists
#4
micro1
Best for: specialists who prefer named contract roles
Visit micro1.ai
Starting priceSee website
Free planYes
micro1 offers named contract roles for software engineers and other specialists, with hourly contracts and published role ranges such as $30 to $100 an hour for engineers. Worker reviews are the highest in this group, at 4.7 across more than ten thousand reviews in published comparisons. That combination of named roles and strong reviews makes micro1 stand out for specialists.
The work feels more like a contract job than a task queue: a defined role, a team, and ongoing hours. That suits specialists who want stability, but it also means roles are competitive and onboarding takes longer than joining a task platform. For an engineer who wants contract work with a real role attached, micro1 is a strong pick.
What we like- Highest worker reviews in this group
- Named roles
- Hourly contracts
Watch out for- Roles are competitive
- Less task-style work than Outlier
Starting priceSee website
Free planYes
Prolific pays participants for research studies, including AI evaluation and human feedback tasks, with a published minimum of $8 an hour and a recommended $12. Studies are short, payouts go to the account balance, and the platform has a strong reputation with more than fifteen thousand reviews at 4.5 in published comparisons.
Prolific suits someone who wants paid work alongside another job or study, rather than a full-time income. The task flow is steadier than most task platforms because studies come from academic and commercial researchers, not just AI labs. If you want reliable side income with clear rates, Prolific is the most transparent option here.
What we like- Published minimum rate
- Fast payouts to balance
- Huge study volume
Watch out for- Studies are short
- Not a full-time income on its own
Starting priceSee website
Free planYes
Mindrift, from Toloka, offers AI training and evaluation tasks to contributors from many supported countries, including generalists as well as experts. The platform states that contributors can join from any country it supports, which makes it more open than expert-only platforms. Tasks cover writing, evaluation, and domain work.
Pay is shown per project rather than as an hourly rate, so effective earnings depend on how fast you work and how steady the task flow is. Availability varies by subject and region, which is normal for task platforms. For a contributor outside the US who wants flexible AI work, Mindrift is one of the more accessible options.
What we like- Open to many countries
- Varied tasks
- Toloka backing
Watch out for- Pay is per project, not hourly
- Availability varies
Starting priceSee website
Free planYes
OneForma, from Centific, offers language, data collection, and AI evaluation tasks across many languages and regions. It suits multilingual contributors and people who want varied work rather than a single task type. The platform is independent of Scale AI, so a deactivation elsewhere does not carry over, which matters to contractors who hold several accounts.
Pay varies by task and is shown per project, so effective rates depend on speed and task availability. OneForma publishes less about expert rates than Alignerr or Mercor, which makes it harder to compare before joining. For a multilingual contributor who wants steady task volume, OneForma is a useful account to hold alongside a higher-paying expert platform.
What we like- Large language coverage
- Varied task types
- Centific backing
Watch out for- Pay varies by task
- Less expert-rate transparency
Starting priceSee website
Free planYes
Surge AI provides expert data, training feedback, and custom evaluations for frontier AI labs, with a managed workforce across hundreds of disciplines. It suits experts who want hard tasks, such as reasoning, coding, and domain evaluation, rather than simple labeling. Quality controls include role-level credential bars, which raise the standard but also raise the entry bar.
The platform is selective, and generalists will find fewer tasks here than on Outlier or Mindrift. For a specialist in a hard field, Surge AI offers work that matches real expertise and pays accordingly. For a beginner, it is better as a later goal than a first account: start with a broader platform, build a record, then apply.
What we like- Expert workforce focus
- Hard-task specialization
- Managed projects
Watch out for- Selective
- Fewer generalist tasks
How we chose
We compared these platforms on pay transparency, task types, screening, payout methods, worker reviews, and fit for different contributor types. We checked vendor pages and public comparison guides, and where rates were not published we wrote See website instead of guessing. We kept the list to platforms a real contributor can join today, and we left out platforms that charge a fee to join, since legitimate platforms do not charge workers to start.
Start by treating this work like freelancing, not employment. No platform promises steady hours, so hold two or three accounts and check each one daily. Apply to one expert platform and one broad task platform at the same time, so a slow week on one is covered by the other. Keep a simple record of tasks, pay, and payout dates, because that record helps you compare effective hourly rates across platforms.
Next, protect your accounts. Read each platform's rules on multiple accounts and location honesty, because breaking those rules is the usual reason accounts are lost. Do not share account access, do not use tools that fake activity, and keep your profile information accurate. A lost account with pending pay is a real cost, so treat account standing as part of the job.
Finally, move up the rate ladder over time. Start with generalist tasks to learn the workflow, then add expert tasks in your strongest subject, where rates are higher. Specialists in medicine, law, coding, and finance earn the most, and a record of high-quality work on one platform helps you pass screening on another. The path from generalist to expert is the most reliable way to raise income in this field.
Frequently asked questions
Is DataAnnotation legitimate?
Yes, DataAnnotation is a real platform that pays contractors to train and evaluate AI models, and it states it has paid hundreds of millions of dollars to contractors since 2020. Like all platforms here, it does not charge a fee to join, and it publishes pay ranges for its roles.
Which platform pays the most?
For experts, Alignerr and Mercor publish the highest averages, around $80 and $85 an hour in published reports. For generalists, Outlier and Mindrift offer steadier task volume but lower per-task pay. Effective pay depends on task availability and your speed, not just the headline rate.
Can I work on several platforms at once?
Yes, and most experienced contractors do, since no platform guarantees steady hours. Check each platform's rules first, because some restrict working on competing tasks, and never share one platform's task content with another.
Do I need a degree to do AI training work?
Not always. Generalist tasks on Outlier, Mindrift, and Prolific are open to strong writers and graduates, while expert roles on Alignerr, Mercor, and Surge AI usually need a degree or professional experience in the subject. Apply to the tier that matches your background.
How do payouts work?
Outlier pays weekly by PayPal, Airtm, or bank transfer. Alignerr states weekly payouts. Mercor pays hourly contracts. Prolific pays per study to your balance. Check the payout method and timing for your country before starting, since options vary by region.
What causes accounts to be lost?
The most common reasons are breaking rules on multiple accounts, location honesty, and quality failures on tasks. Read the rules, keep information accurate, and do not rush tasks. If an account is lost, other platforms are independent, so work on one account does not carry a ban to another.
Sources we checked (8)
- https://outlier.ai
- https://www.alignerr.com
- https://www.mercor.com
- https://www.micro1.ai
- https://www.prolific.com
- https://www.mindrift.ai
- https://www.oneforma.com
- https://www.surgeai.com
Is your product missing or out of date?
We review this list regularly. Vendors can request a listing, send updated pricing or ask about featured placement.
Shihab Mia · Founder, Rankite
Shihab has 5+ years in B2B and SaaS SEO. He writes Rankite's software buying guides from pricing pages, documentation and public user reviews. More about Shihab.