Shortlist by what you need
Start here if you know why you are leaving Scale AI.
Want the closest match?
Surge AIMost similar to Scale AI in what it does, its category and its price.
Visit (opens Surge AI in a new tab)Need a free plan?
RoboflowHas a free plan, rated 4.4 out of 5.
Visit (opens Roboflow in a new tab)Want the lowest price?
DatatureFrom $299/mo, the lowest starting price here.
Visit (opens Datature in a new tab)Want the best rated?
LabelboxRated 4.1 out of 5 in our review, against 4.0 for Scale AI.
Visit (opens Labelbox in a new tab)
At a glance
Green means better than Scale AI, red means worse. Prices are starting prices per month.
| Tool | Our rating | Starts at | Free plan | Best for | Compare |
|---|---|---|---|---|---|
 Scale AIBaseline | 4.0 | Free | Yes | Data-labeling infrastructure that trained early GPT and Waymo models, now backed by Meta | |
| Surge AI | 4.3+0.3 | Not listed | No | Reached $1B+ ARR bootstrapped, with zero venture funding until mid-2025 | vs Scale AI |
| Labelbox | 4.1+0.1 | Free | Yes | Runs reinforcement-learning data factories that power frontier models for the world's top AI labs | vs Scale AI |
 Mercor | 4.1+0.1 | Not listed | No | Reached a $10 billion valuation organizing 300,000 human experts to train frontier AI models | vs Scale AI |
 Defined.ai | 3.6−0.4 | Not listed | No | The world's largest ethically-sourced AI data marketplace - trusted by Adobe, Amazon, Google, Meta, and OpenAI, custom data collection across 150+ countries and 500+ languages. | vs Scale AI |
 DatologyAI | 3.9−0.1 | Not listed | No | Automated data curation that strips redundant or harmful examples out of AI training datasets before a model ever sees them. | vs Scale AI |
| Roboflow | 4.4+0.4 | Free | Yes | End-to-end computer vision platform from annotation to production deployment | vs Scale AI |
| Datature | 3.9−0.1 | $299/mo | Yes | A no-code computer vision platform for training, deploying, and monitoring image and video AI models. | vs Scale AI |
 Nscale | 3.9−0.1 | Not listed | No | European sovereign AI cloud that raised over $3B to build GPU capacity outside US hyperscalers | vs Scale AI |
The alternatives in detail
In order of how closely each one matches Scale AI.
Surge AI
4.3Not listed
vs Scale AI+0.3
Reached $1B+ ARR bootstrapped, with zero venture funding until mid-2025.
- Data annotation and reinforcement learning from human feedback for AI training
- Network of roughly 50,000 expert contributors worldwide
- Reached $1.2B in annualized revenue entirely bootstrapped, no funding until 2025
Trusted by nearly every major frontier AI lab for training data quality
Quote-based pricing requires a sales conversation, no published self-serve rates
Labelbox
4.1Free
vs Scale AI+0.1
Runs reinforcement-learning data factories that power frontier models for the world's top AI labs.
- Three connected products: Catalog (curation), Annotate (labeling), Model (evaluation)
- Reinforcement-learning data factory positioning for frontier model training
- Human- and model-assisted labeling workflows in one pipeline
Full pipeline (curate, label, evaluate) avoids stitching together separate point tools
LBU-based pricing takes time to model accurately before committing to a budget
Mercor
4.1Not listed
vs Scale AI+0.1
Reached a $10 billion valuation organizing 300,000 human experts to train frontier AI models.
- Marketplace matching AI labs with vetted domain experts, not generalist crowdworkers
- Pool of roughly 300,000 professionals across engineering, medicine, law, and other fields
- Built for reinforcement-learning feedback and evaluation work, not just raw labeling
Domain-expert focus fits specialized training data needs generalist labeling vendors can't serve
Recruiting-fee pricing model means costs scale unpredictably with expert seniority and volume
Defined.ai
3.6Not listed
vs Scale AI−0.4
The world's largest ethically-sourced AI data marketplace - trusted by Adobe, Amazon, Google, Meta, and OpenAI, custom data collection across 150+ countries and 500+ languages.
- Datasets across audio, image, video, text, and multimodal formats
- Custom data collection across 150+ countries and 500+ languages
- Model-in-the-loop data annotation and evaluation
Real, verifiable major-company client roster
Pricing isn't public - requires a custom quote
DatologyAI
3.9Not listed
vs Scale AI−0.1
Automated data curation that strips redundant or harmful examples out of AI training datasets before a model ever sees them.
- Modality-agnostic data curation across text, image, and other data types
- Label-free algorithms for identifying redundant or harmful training examples
- Designed to cut training compute cost for a given model quality target
Research pedigree (Meta AI, DeepMind, MosaicML alumni, award-winning papers) backs the technical claims
No published pricing, and the sales-led model suits large labs more than small teams
Roboflow
4.4Free
vs Scale AI+0.4
End-to-end computer vision platform from annotation to production deployment.
- Dataset management and versioning for vision projects
- Model-assisted annotation to cut labelling time
- Augmentation and preprocessing pipelines
Covers the whole vision pipeline rather than one stage
Usage pricing climbs steeply at production inference volume
Datature
3.9$299/mo
vs Scale AI−0.1
A no-code computer vision platform for training, deploying, and monitoring image and video AI models.
- No-code model training covering annotation through deployment
- AI-assisted IntelliBrush tool for faster image and video annotation
- Support for state-of-the-art architectures including YOLOv8
Covers the full computer vision pipeline (label, train, deploy) in one platform rather than stitching tools together
Professional plan jumps to $499/month on monthly billing if a team is not ready to commit annually
Nscale
3.9Not listed
vs Scale AI−0.1
European sovereign AI cloud that raised over $3B to build GPU capacity outside US hyperscalers.
- GPU cloud infrastructure positioned as European sovereign AI capacity
- Over $3 billion raised to fund data center buildouts across Europe
- Enterprise-scale, contract-based deployments rather than self-serve instances
European data residency answers a real regulatory need US-hosted clouds cannot
Enterprise contract-only pricing means no self-serve option for smaller teams
FAQ
Questions people ask
Is Scale AI free?
Scale AI has a free plan.
What is the best free alternative to Scale AI?
Roboflow is the highest-rated alternative here with a free plan (4.4 out of 5). Other free options: Labelbox, Datature.
What is the cheapest alternative to Scale AI?
Among paid plans, Datature has the lowest starting price (from $299/mo). If you need it free, start with Roboflow.
How did you pick these alternatives?
We match tools on what they do, their category and their price, using the details in our directory. Ratings come from our reviews and reader reviews.