kitio.aiScale AI vs Defined.ai
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 Defined.ai 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
- Dataset marketplace
- Text, audio, image and video annotation
- Custom data collection
- Model and data evaluation
- Multilingual speech data
- Developer API
| Feature | Scale AI | Defined.ai |
|---|---|---|
| Best for | Training data, evaluation and data labeling for frontier AI | Training data marketplace and annotation services for enterprise AI |
| 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 | Defined.ai |
| Based in | United States | United States |
| Rating | No ratings yet | No ratings yet |
| Key features |
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Pricing compared
Scale AI starts at See pricing page and Defined.ai 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
Defined.ai
- Covers many languages and data types
- Off-the-shelf datasets plus custom projects
- Human review on labeled data
- No public pricing
- Custom projects go through sales
- Aimed at enterprises rather than individuals
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 Defined.ai if you want:
- Covers many languages and data types
- Off-the-shelf datasets plus custom projects
- Human review on labeled data
Watch out: no public pricing.
Scale AI vs Defined.ai FAQ
What is the difference between Scale AI and Defined.ai?
Scale AI: Training data, evaluation and data labeling for frontier AI. Defined.ai: Training data marketplace and annotation services for enterprise AI. Both are data & analytics tools.
Is Scale AI or Defined.ai cheaper?
Scale AI starts at See pricing page and Defined.ai starts at See pricing page. Check both pricing pages for current plans.
Do Scale AI and Defined.ai have free plans?
Scale AI: No. Defined.ai: No.
Who makes Scale AI?
Scale AI is made by Scale AI, based in United States.
Who makes Defined.ai?
Defined.ai is made by Defined.ai, based in United States.
Which should I choose, Scale AI or Defined.ai?
Choose Scale AI if you value handles very large labeling projects and expert contributors for hard tasks. Choose Defined.ai if you value covers many languages and data types and off-the-shelf datasets plus custom projects.