Public price
A possible mention appeared on a comparison or unrelated page, so we did not count it.
Open sourceAppen alternatives
We could not read a price on Appen's site. We found 7 out of 10 of the buying evidence we check for. 3 of the 20 other products below publish more.
This is a comparison of what each company publishes on its own site. It covers price, free access, measured results, documented limits, product updates, and testing methods. It is evidence for a shortlist, not a rating of product quality. The products below share a broad category and are not necessarily direct substitutes. Use Comparima for direct competitors.
Data labellingHow this market looks from public information.
4 of 21for published buying evidence
10%publish a usable price
76%can be tried first
48%publish measured results
76%state their limits
What we could verify
Every finding links to the page it came from. Open the source before relying on it.
Try before paying
Source is publicly inspectable (github.com/xbow-engineering/validation-benchmarks).
Open sourceMeasured customer result
Publishes a supported measurable result ("100.0% Perfect scores").
Open sourceDocumented limits
Documents where it falls short ("failure mode").
Open sourceTesting method
Describes how it was tested ("We tested"; includes false positive).
Open sourceRecent product updates
No public changelog or releases page. A buyer cannot tell if this is actively maintained.
Open sourceAsk before you buy
These questions come from the information we could not verify on the public site.
- What will this cost for my current team, and what changes when usage grows?
- How often is the product updated, and where are releases documented?
Compare the field
Showing 12 of 20 that match your filters.
Appenappen.com
7/10website evidenceno price we could read
No price we could find. No public changelog we could find.
- You can try it without paying
- Publishes a measured result
- Says what it cannot do
- Shows how it was tested
- No price we could find
- No public changelog we could find
CVATcvat.ai
8/10website evidenceno price we could read
Publishes about as much buying evidence as Appen. Actively maintained, unlike Appen.
- You can try it without paying
- Publishes a measured result
- Says what it cannot do
- Shows how it was tested
- Actively maintained
- No price we could find
Kilikili-technology.com
8.5/10website evidencefree tier
Publishes about as much buying evidence as Appen. Price is on the site, unlike Appen.
- Price is on the site
- You can try it without paying
- Publishes a measured result
- Says what it cannot do
- Actively maintained
- No test method we could find
SuperAnnotatesuperannotate.com
8/10website evidenceno price we could read
Publishes about as much buying evidence as Appen. Actively maintained, unlike Appen.
- You can try it without paying
- Publishes a measured result
- Says what it cannot do
- Shows how it was tested
- Actively maintained
- No price we could find
Surge AIsurgehq.ai
7/10website evidenceno price we could read
Publishes about as much buying evidence as Appen.
- You can try it without paying
- Publishes a measured result
- Says what it cannot do
- Shows how it was tested
- No price we could find
- No public changelog we could find
Voxel51voxel51.com
7/10website evidenceno price we could read
Publishes about as much buying evidence as Appen.
- You can try it without paying
- Publishes a measured result
- Says what it cannot do
- Shows how it was tested
- No price we could find
- No public changelog we could find
Argillaargilla.io
5/10website evidenceno price we could read
Publishes less buying evidence than Appen. No measured result we could find, though Appen publishes one.
- You can try it without paying
- Says what it cannot do
- Shows how it was tested
- No price we could find
- No measured result we could find
- No public changelog we could find
Cleanlabcleanlab.ai
5/10website evidenceno price we could read
Publishes less buying evidence than Appen. No measured result we could find, though Appen publishes one.
- You can try it without paying
- Says what it cannot do
- Shows how it was tested
- No price we could find
- No measured result we could find
- No public changelog we could find
Lightlylightly.ai
5/10website evidenceno price we could read
Publishes less buying evidence than Appen. Actively maintained, unlike Appen.
- You can try it without paying
- Publishes a measured result
- Actively maintained
- No price we could find
- No stated limits we could find
- No test method we could find
Prodigyprodi.gy
4.5/10website evidenceno price we could read
Publishes less buying evidence than Appen. Actively maintained, unlike Appen.
- You can try it without paying
- Says what it cannot do
- Actively maintained
- No price we could find
- No measured result we could find
- No test method we could find
V7v7labs.com
4.5/10website evidenceno price we could read
Publishes less buying evidence than Appen. Actively maintained, unlike Appen.
- You can try it without paying
- Says what it cannot do
- Actively maintained
- No price we could find
- No measured result we could find
- No test method we could find
Clickworkerclickworker.com
3.5/10website evidenceno price we could read
Publishes less buying evidence than Appen. No measured result we could find, though Appen publishes one.
- You can try it without paying
- Says what it cannot do
- No price we could find
- No measured result we could find
- No test method we could find
- No public changelog we could find
Datasaurdatasaur.ai
3.5/10website evidenceno price we could read
Publishes less buying evidence than Appen. No measured result we could find, though Appen publishes one.
- You can try it without paying
- Says what it cannot do
- No price we could find
- No measured result we could find
- No test method we could find
- No public changelog we could find
Read in August 2026 from pages anyone can open. This is what each company puts on its own site, which is not the same as how good the product is. Something excellent can still tell you very little. Spotted a mistake? Tell us and we will read it again.
Check a product we have not covered