kitio.aiScale AI vs Appen
A side-by-side look at pricing plans, free tiers, features, pros and cons, updated for 2026. Scale AI starts at See pricing page and Appen starts at See pricing page. Check both pricing pages for current plans.
At a glance
Best for
Category
Pricing model
Starting price
Free plan
Made by
Based in
Rating
Key features
- Managed data labeling
- RLHF and expert data
- Model evaluations
- Data Engine platform
- Public leaderboards
- Custom data collection
- RLHF and red teaming
- Speech and multimodal annotation
- LiDAR and robotics labeling
- Off-the-shelf datasets
- AI Data Platform (ADAP)
| Feature | Scale AI | Appen |
|---|---|---|
| Best for | Training data, evaluation and data labeling for frontier AI | Human-annotated training data and model evaluation for AI teams |
| Category | Data & analytics | Data & analytics |
| Pricing model | Paid | Paid |
| Starting price | See pricing page | See pricing page |
| Free plan | No | No |
| Made by | Scale AI | Appen |
| Based in | United States | Australia |
| Rating | No ratings yet | No ratings yet |
| Key features |
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Pricing compared
Scale AI starts at See pricing page and Appen starts at See pricing page. Check both pricing pages for current plans.
Free plan
Cheapest paid plan
Top plan
Free trial
Prices in USD, checked Oct 28, 2026 or later. Plans change often, so confirm on each tool's site before you buy.
Pros and cons
Scale AI
- Handles very large labeling projects
- Expert contributors for hard tasks
- Strong evaluation work
- Built for large contracts
- Some labs moved to rivals after Meta deal
Appen
- Covers text, speech, vision and code data
- Coverage in over 500 locales
- SOC 2 and ISO 27001 certified
- Project-based pricing via sales
- Service-heavy rather than self-serve
- Mainly for larger AI teams
Which one should you choose?
Choose Scale AI if you want:
- Handles very large labeling projects
- Expert contributors for hard tasks
- Strong evaluation work
Watch out: built for large contracts.
Choose Appen if you want:
- Covers text, speech, vision and code data
- Coverage in over 500 locales
- SOC 2 and ISO 27001 certified
Watch out: project-based pricing via sales.
Scale AI vs Appen FAQ
What is the difference between Scale AI and Appen?
Scale AI: Training data, evaluation and data labeling for frontier AI. Appen: Human-annotated training data and model evaluation for AI teams. Both are data & analytics tools.
Is Scale AI or Appen cheaper?
Scale AI starts at See pricing page and Appen starts at See pricing page. Check both pricing pages for current plans.
Do Scale AI and Appen have free plans?
Scale AI: No. Appen: No.
Who makes Scale AI?
Scale AI is made by Scale AI, based in United States.
Who makes Appen?
Appen is made by Appen, based in Australia.
Which should I choose, Scale AI or Appen?
Choose Scale AI if you value handles very large labeling projects and expert contributors for hard tasks. Choose Appen if you value covers text, speech, vision and code data and coverage in over 500 locales.