Public price
A possible mention appeared on a comparison or unrelated page, so we did not count it.
Open sourceAppen alternatives
Pricing was not verified from the public pages we read for Appen. 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
33%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
This scan did not verify a dated first-party changelog or release history.
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 evidencepricing not verified
Pricing not verified. Recent updates not verified.
- You can try it without paying
- Publishes a measured result
- Says what it cannot do
- Shows how it was tested
- Pricing not verified
- Recent updates not verified
CVATcvat.ai
10/10website evidencefree tier
Publishes more buying evidence than Appen. Pricing is published, unlike Appen.
- Pricing is published
- You can try it without paying
- Publishes a measured result
- Says what it cannot do
- Shows how it was tested
- Actively maintained
Kilikili-technology.com
8.5/10website evidencefree tier
Publishes about as much buying evidence as Appen. Pricing is published, unlike Appen.
- Pricing is published
- You can try it without paying
- Publishes a measured result
- Says what it cannot do
- Actively maintained
- Testing method not verified
SuperAnnotatesuperannotate.com
8/10website evidencepricing not verified
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
- Pricing not verified
Prodigyprodi.gy
6.5/10website evidencepricing published
Publishes about as much buying evidence as Appen. Pricing is published, unlike Appen.
- Pricing is published
- You can try it without paying
- Says what it cannot do
- Actively maintained
- Measured results not verified
- Testing method not verified
Surge AIsurgehq.ai
7/10website evidencepricing not verified
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
- Pricing not verified
- Recent updates not verified
Voxel51voxel51.com
7/10website evidencepricing not verified
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
- Pricing not verified
- Recent updates not verified
Argillaargilla.io
5/10website evidencepricing not verified
Publishes less buying evidence than Appen. Measured results not verified, though Appen publishes one.
- You can try it without paying
- Says what it cannot do
- Shows how it was tested
- Pricing not verified
- Measured results not verified
- Recent updates not verified
Cleanlabcleanlab.ai
5/10website evidencepricing not verified
Publishes less buying evidence than Appen. Measured results not verified, though Appen publishes one.
- You can try it without paying
- Says what it cannot do
- Shows how it was tested
- Pricing not verified
- Measured results not verified
- Recent updates not verified
Datasaurdatasaur.ai
5.5/10website evidencepricing published
Publishes about as much buying evidence as Appen. Pricing is published, unlike Appen.
- Pricing is published
- You can try it without paying
- Says what it cannot do
- Measured results not verified
- Testing method not verified
- Recent updates not verified
Lightlylightly.ai
5/10website evidencepricing not verified
Publishes less buying evidence than Appen. Actively maintained, unlike Appen.
- You can try it without paying
- Publishes a measured result
- Actively maintained
- Pricing not verified
- Product limits not verified
- Testing method not verified
Prolificprolific.com
5.5/10website evidencepricing published
Publishes about as much buying evidence as Appen. Pricing is published, unlike Appen.
- Pricing is published
- You can try it without paying
- Says what it cannot do
- Measured results not verified
- Testing method not verified
- Recent updates not verified
Roboflowroboflow.com
6/10website evidencepricing published
Publishes about as much buying evidence as Appen. Pricing is published, unlike Appen.
- Pricing is published
- You can try it without paying
- Publishes a measured result
- Product limits not verified
- Testing method not verified
- Recent updates not verified
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.
Compare a product we have not covered