Category
Data Labeling & Synthetic Data
Better training data, faster.
6 tools·3 with free plan·2 with free trial
Top picks
01
Data development and evaluation platform for enterprise AI
Snorkel AI is a serious, research-backed player for enterprises and AI labs that need custom, high-quality training and evaluation data, and its shift toward being a data lab reflects where demand has moved. That also means it is not a self-serve tool: pricing is custom and typically enters the five- to six-figure range, engagements are consultative, and it is aimed at organizations with substantial model-development budgets rather than individual developers.
paid·Custom enterprise pricing
02
Synthetic data platform, now part of NVIDIA
Gretel was a well-regarded synthetic-data platform, but the key fact as of 2026 is that NVIDIA acquired it in 2025 and folded it into NVIDIA's developer AI services. That means its independent product status and former pricing should not be assumed, and teams evaluating synthetic data should verify how the technology is now offered through NVIDIA rather than signing up expecting the old standalone experience. We flag Gretel as acquired.
freemium·Historically free tier; status changed post-acquisition
03
Data labeling and AI data platform (Meta-invested)
Scale AI remains one of the most capable and largest AI data providers, and for enterprise and government customers it offers scale and quality that few competitors match. The essential 2026 context, though, is Meta's roughly $14.3 billion investment for a large minority stake in 2025, after which several competing AI labs reportedly pulled work over neutrality concerns and Scale trimmed revenue guidance. Buyers should factor in that shift, and note that pricing is custom and enterprise-oriented rather than public.
paid·Custom enterprise pricing (per task or contract)
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Frequently asked questions
- What's the best data labeling & synthetic data tool?
- Snorkel AI currently leads in community votes. Snorkel AI is a serious, research-backed player for enterprises and AI labs that need custom, high-quality training and evaluation data, and its shift toward being a data lab reflects where demand has moved. That also means it is not a self-serve tool: pricing is custom and typically enters the five- to six-figure range, engagements are consultative, and it is aimed at organizations with substantial model-development budgets rather than individual developers.
- Are there free options?
- 3 tools in this category offer a free plan. Another 2 have a free trial.
- How do you rank these tools?
- Tools are ranked by a combination of community upvotes, editorial review, and feature breadth. Our editors review pricing and capabilities quarterly.
- Can I suggest a tool we're missing?
- Yes — submit it here. Our team reviews submissions weekly.