Updated 8 Nov 2026
Appen vs clickworker, by the numbers.
Appen ranks higher by the money on record: its revenue is on record, $249M (12 months to Jun 2026), and clickworker's is not, so clickworker is ranked on $6M raised.
Both sell datasets and annotation. Only Appen sells labeling software, expert and human data, RL environments and evaluations and benchmarks. Every figure below is linked to the filing or article it comes from; what each sells is in its own words, from its own pages.
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Side by side
Revenue over twelve months, the newest valuation, disclosed funding and what each says it does.
| Appen | clickworker | |
|---|---|---|
| Appen | clickworker | |
| Place on the rankings | #11 of 78 | #66 of 78 |
| Ranked on | $249M Revenue, 12 months to Jun 2026 | $6M Money raised, disclosed |
| Revenue, twelve months | $249M 12 months to Jun 2026 over time | Not on record |
| Newest valuation | Not on record | Not on record |
| Disclosed funding | Not on record | $6M in 1 record |
| Sells | Labeling software, Datasets, Expert and human data, RL environments, Evaluations and benchmarks, Annotation | Datasets, Annotation |
| Works on | Coding, Business work, Finance, Legal, Medical, Science, Robotics, Speech and audio, Images and video, Languages | Images and video, Speech and audio |
| Made from | Recorded from people and the real world, Made by experts and contractors, Licensed from its owners, Generated | Recorded from people and the real world |
| Takes data from companies | Its own programme | Does not say so |
| Headquarters | Kirkland, Washington, US and Sydney, New South Wales, Australia (dual headquarters) | Essen, Germany |
| Founded | 1996 | 2005 |
| In its own words | “We deliver the expert-validated data that trains frontier models, ensuring AI systems understand nuance, context, and complexity at scale.” Its page | “At clickworker, data services refer to providing custom, human-generated or human-validated data to support digital workflows, AI development, and business operations.” Its page |
- The rule.
- Each company is ranked on the first of these it has on record: its revenue over twelve months (a run rate or a year as published, or its last four quarters added up; an AI segment where the rest of its business is not AI data), then its newest valuation, then the money it disclosed raising. No company pays for a place. The full method and every change to it.
- Twelve months.
- A run rate or ARR is the company's own annualised figure; a year is the year it published. Gross revenue of a human data company includes what it pays its experts.
- Pays companies for data.
- "Through our introductions": it takes companies' data through AIData.Broker's introductions and pays us a referral fee when one goes ahead. That never moves its place: the order is the money on record. "Its own programme": a published programme for buying data. "Says it buys data": its own words, linked.
- Why this pair.
- People search for this comparison: Google suggests it, read on 8 Nov 2026. Neither company asked for or paid for this page.
Selling your company's data to Appen or clickworker
What each says it pays a company for its data, what it wants and when it pays, in its own published terms.
| Appen | clickworker | |
|---|---|---|
| Takes data from companies | Its own programme | Does not say so |
| What it says it pays | Not published | Not published |
| What it wants | Operational documentation (procedures, wikis, QA), decision and escalation records (support desk, ITSM, CRM, project tracking, messaging) and systems of record (ERP, warehouse, contracts, HR, procurement). | Not published |
| When it pays | "Payment is on acceptance rather than submission." | Not published |
You need not choose one: AIData.Broker values a company's data free and introduces it to every buyer whose own rules take it. Value your data
On the same rankings
The lists both are ranked on, with each one's place.
- Best AI data collection companiesAppen #3, clickworker #26 of 30
- Speech and audio training data companiesAppen #4, clickworker #18 of 20
- Video and image training data companiesAppen #6, clickworker #31 of 37
- Best data labeling companiesAppen #7, clickworker #32 of 40
- Best AI training data providersAppen #10, clickworker #46 of 53
The latest money moves
The newest rounds, valuations and revenue figures of the two, each linked to its record.
- 27 Aug 2026Appen reported $249M revenue (12 months to Jun 2026)
- 17 Dec 2024clickworker was acquired by LXT
- 12 Mar 2024Appen was acquired by Innodata
- 6 Apr 2011clickworker raised $6M
The questions people ask
- Is Appen bigger than clickworker?
- Appen ranks higher by the money on record: its revenue is on record, $249M (12 months to Jun 2026), and clickworker's is not, so clickworker is ranked on $6M raised.
- What is the difference between Appen and clickworker?
- Appen provides AI training data, data annotation and model evaluation to AI labs and other AI teams. clickworker sells crowd-sourced data collection, labeling and AI training datasets, delivered by a crowd of registered freelancers. Both sell datasets and annotation. Only Appen sells labeling software, expert and human data, RL environments and evaluations and benchmarks.
- Which raised more money, Appen or clickworker?
- Appen: no disclosed round on record. clickworker: $6M disclosed.
- Do Appen and clickworker buy data from companies?
- Appen takes data from the companies that hold it, through a published programme. clickworker does not say it buys data from companies.
More comparisons
Each company against its whole field, and the other comparisons people search.