RWS TrainAI is a real company with real Korea-resident jobs. The main risk is late payment, so do not count on the income until you have been paid.
RWS is a UK company listed on AIM, the London Stock Exchange growth market. TrainAI is its AI-data brand. RWS launched it in February 2023 for data collection, data annotation, and data validation. RWS's community page says "There is no fee required to join the TrainAI community." Pay is per task, by PayPal or bank transfer.
This review covers the ratings, the open Korean roles, what the pay looks like, and the Korean visa and tax questions. For two comparisons, see our reviews of Welocalize and Alignerr.
What the reviews say
The rating below is a company-wide RWS figure, not a TrainAI-only figure. The pool includes translation staff and customers of RWS's other services.
| Site | What it covers | Rating | Reviews | Read |
|---|---|---|---|---|
| Trustpilot | RWS (www.rws.com) | 1.8 out of 5 | 53 | October 14, 2026 |
When we read Trustpilot on October 14, 2026, close to nine in ten reviews were one star and about one in ten were five stars. Trustpilot notes that the company has no record of inviting reviews. Only one review mentions the TrainAI department. The common complaints are late payment, a work order that arrives long after the hours were worked, and unhelpful customer support. A few reviewers describe the pay as fair and the tasks as simple.
Review counts move, so check the site for the current numbers. We read it through a regional mirror of the site.
What TrainAI work is
RWS's community page lists these roles: Online Rater, Data Collector, Data Annotator, Search Engine Evaluator, Ad Evaluator, and project-specific opportunities. The page describes four steps: join the community, finish training and testing, complete tasks, and get paid.
You need your own computer. RWS provides no equipment or software.
Korean roles on the RWS job board
Applications go through RWS's Lever job board at jobs.lever.co/rws. Each posting shows "RWS – TrainAI" under the job title, and the board header reads "RWS TrainAI."
In October 2026, the board showed five Korean postings.
| Role | Location field | Posted pay | Posted hours |
|---|---|---|---|
| Search Engine Evaluator - Korean | South Korea (Work from Home) | Up to $10 per hour | At least 5 and at most 20 hours per week |
| AI Data Specialist - Korean | Work from home | $10 per hour | 10 or more hours per week, flexible |
| Speech AI Evaluation Specialist - Korean | Korea (work from home) | $10 per hour | 10 or more hours per week |
| Legal Annotators - Korean | Seoul / Remote | $22.95 per hour | 25 or more flexible hours per week |
| General AI Data Annotator - Korean | United States (listed as California) | $21.50 per hour | 20 hours per week, Monday to Friday |
Postings change, and these were live on October 14, 2026.
Check the location field first
The last role in the table has "Korean" in the title but is for people living in the United States. People living in Korea cannot apply to it. The role title does not tell you which applicant pool a posting is for, so read the location field on every posting before you spend time on it.
What the postings ask for
- Search Engine Evaluator (검색 평가원). You test how a client's search engine responds to everyday searches. The posting asks that you "Currently reside in South Korea." It also says "Only one Search Quality Rater per household." You must pass training modules and a required test created by the client before you start work.
- AI Data Specialist. A freelance, long-term project. The posting says rates vary by country.
- Speech AI Evaluation Specialist. You take part in short voice conversations with AI models on a designated platform. The posting asks for native-level Korean and advanced English (levels B2 to C2).
- Legal Annotators. The posting asks for contract or legal domain expertise. It does not state a degree requirement.
Pay: what is posted and what is not
RWS's pages say it pays per task completed. Task payments vary by project based on the time a task takes, and payment details are shared in advance. RWS's TrainAI community page and recruiting FAQ give no rate card, no pay schedule, and no payout currency.
The posted hourly rates in the table above are in US dollars. The hours on a posting are a range, not guaranteed work. A 20-hour weekly maximum means RWS will not ask for more, not that RWS will supply that many tasks.
For comparison, Alignerr's Korean language roles ran $20 to $40 per hour in our Alignerr review. The Korean rater and data postings at RWS sit well below that. The legal annotation role is the exception.
How RWS pays
RWS's pages say payments go by PayPal or directly to your bank account, and you choose when you register. If the payment route is unclear, ask which service will pay you.
Late payment is the main risk
Contributor complaints on Trustpilot describe waits of weeks to months. We cannot confirm any single account. The pattern is consistent enough that you should plan for it.
How to apply
- Open jobs.lever.co/rws and search for "Korean."
- Read the location field on each posting.
- Apply to a posting that lists South Korea or Seoul.
- When you apply, choose how you work: private individual, sole proprietor or freelancer, or company. RWS's FAQ lists these three choices.
- Wait for the recruiting team. RWS's FAQ says the recruiting team will reach out about next steps. It gives no timeline.
- Finish training and any required test.
Before you start working
Ask for these four items in writing:
- The name of the RWS entity that will pay you.
- The payout currency.
- The payment date or schedule.
- Whether you must send an invoice, and in what format.
Then keep your own record of the hours or tasks you complete each week. If a payment is late, you will have something to compare against the work order.
Can you legally do this on your Korean visa?
This is general context, not legal advice. Confirm your situation with Immigration.
- F-2, F-4, F-5, F-6 (open work rights): You can generally take this work freely.
- E-1 through E-7 (employment-based visas): Work outside what your visa covers needs an activity-outside-status permit (체류자격외 활동허가) from Immigration before you start. A second job inside your own visa category follows different rules, and some holders only file a report. Remote work for a foreign company is unclear, so call 1345 and describe the work first.
- D-2, D-4 (student visas): You must get an activity-outside-status permit (체류자격외 활동허가) from Immigration before you do any paid work. The weekly part-time hour limit is not a flat number. It depends on your degree program and year, your Korean-language level (TOPIK or an equivalent), and, for some students, whether your university is certified and your grades are high. Confirm your current limit on HiKorea or by calling 1345.
- D-10 (job seeker), D-8 (business): Case by case. Call 1345 and describe your situation.
The Search Engine Evaluator posting asks that you currently live in South Korea. That confirms you can apply from Korea. It does not say which visas RWS accepts.
Korean tax: the 5-year rule
Under Korea's Income Tax Act (소득세법), a foreign resident with 5 years or less of domicile or residence in Korea over the 10 years before the end of the tax year is taxed on foreign-source income only to the extent it is paid in Korea or remitted into Korea. Once your residence passes that window, you are taxed on worldwide income.
Whether RWS income counts as foreign-source is not settled by who pays you, and you do this work from inside Korea. RWS's TrainAI community page and recruiting FAQ do not name the RWS entity that pays contributors. Ask for the paying entity in writing, as the checklist above says, and ask the National Tax Service how the 5-year rule applies to you.
Three other points to check before you rely on any tax treatment:
- Registration. The Lever postings define a freelancer as someone with a business license. Many contributors in Korea would apply as a private individual instead. Ask the National Tax Service whether your work needs business registration (사업자등록) in Korea.
- Filing. Ask the National Tax Service whether you must file a comprehensive income tax (종합소득세) return for this income, and when.
- Residency rules. Korea's tax residency rules have changed over time. Check your current status with the National Tax Service or a tax professional.
Keep a monthly record of what you earn and when it arrives. You will need it for any filing.
Should you sign up?
RWS TrainAI is a reasonable choice if:
- A posting explicitly lists South Korea or Seoul, and the role matches your language or legal skills.
- You can wait for payment without hardship.
- You are willing to confirm the paying entity, currency, and timing before you start.
Look elsewhere first if:
- You want the highest pay for Korean-language work. Alignerr posted higher Korean rates in our review.
- You prefer a fixed weekly schedule. Welocalize hires into scheduled weekly hours, but it is a separate company.
- You need income on a fixed date each month.
For other options, see Outlier and our list of job sites in Korea. Browse live Korean-language listings at seoulstart.com/ai-training-jobs.
FAQ
Is RWS TrainAI legit or a scam?
It is legit. RWS is a UK company listed on AIM, and RWS's community page says there is no fee to join. The complaints from contributors are about late payment and slow support, not about fake work.
How much does RWS TrainAI pay in Korea?
In October 2026, the Korean Search Engine Evaluator, AI Data Specialist, and Speech AI Evaluation Specialist postings showed $10 per hour. The Legal Annotators posting showed $22.95 per hour. Postings change, and the hours listed are a range, not guaranteed work.
How long does RWS take to pay?
RWS's TrainAI community page and recruiting FAQ give no pay schedule. Trustpilot reviewers describe waits of weeks or longer. Ask for the payment date and the paying entity in writing before you start.
How does RWS TrainAI pay: PayPal or bank transfer?
RWS's pages say payments go by PayPal or directly to your bank account. RWS's TrainAI pages do not state the payout currency, so confirm it before you accept work.
Can I work for RWS TrainAI on my Korean visa?
It depends on your visa. F-2, F-4, F-5, and F-6 holders generally have open work rights. E-visa holders usually need a permit for concurrent employment, and students on D-2 or D-4 need an activity-outside-status permit (체류자격외 활동허가) first. Call 1345 and describe the work before you start.
Do I have to pay Korean tax on RWS income?
You should plan to report it. If you have 5 years or less of domicile or residence in Korea over the prior 10 years, foreign-source income is taxed only to the extent it is paid in or remitted to Korea. Whether RWS income counts as foreign-source is not settled by who pays you, and you do this work from inside Korea. Ask the National Tax Service before you assume the 5-year rule applies, and check your filing duties with them.
Is RWS TrainAI the same as RWS or Welocalize?
TrainAI is the AI-data brand of RWS, so it is part of RWS. Welocalize is a separate company with its own Welo Data brand. The two companies run separate job boards.
Does RWS TrainAI require a minimum number of hours?
It depends on the posting. The Korean Search Engine Evaluator posting asks for at least 5 and at most 20 hours per week. The AI Data Specialist and Speech AI postings list 10 or more hours per week, and the Legal Annotators posting lists 25 or more flexible hours per week.