Added Nov 5, 2026
Defined.ai
PaidTraining data marketplace and annotation services for enterprise AI
What is Defined.ai?
Defined.ai supplies multilingual, multimodal training data for machine learning and generative AI, through a dataset marketplace and custom collection, labeling and evaluation projects. Its customers are AI teams in automotive, finance, gaming, healthcare, retail and robotics.
Services cover model-in-the-loop data annotation for text, audio, image and video, data collection at global scale, machine translation, and testing of data and models for accuracy and fairness. Speech recognition, content moderation and conversational AI are among the main use cases.
Ready-made datasets can be browsed in the marketplace, and an API is documented for developers. The company holds ISO 42001 certification for AI management and also runs Accelerat.ai, a multilingual AI agent product for customer support.
Features
- Dataset marketplace
- Text, audio, image and video annotation
- Custom data collection
- Model and data evaluation
- Multilingual speech data
- Developer API
Tags
Releases
+ Submit new release- Listed
Defined.ai was added to the directory.
Organization
Defined.ai
🇺🇸 United States
Listed by kitio.ai · unverified owner
Pricing
- Pricing model
- Paid
- Paid options from
- Not listed
Sponsored
Your AI tool here
A Featured launch puts your tool in this spot and on the home page for a week.
Top Defined.ai alternatives
View allData & analytics
Training data, evaluation and data labeling for frontier AI
Data & analytics
Human-annotated training data and model evaluation for AI teams
Data & analytics
Web scraping platform with thousands of ready-made scrapers
Data & analytics
Build, label and deploy computer vision models
Compare Defined.ai
If you liked Defined.ai
- ProdigyNew
Scriptable annotation tool for training NLP, vision and LLM models
PaidData & analyticsMade in Germany Open-source data labeling tool for any data type
FreemiumData & analyticsMade in United StatesData labeling platform and expert network for AI training
FreemiumData & analyticsMade in United StatesData development platform for multimodal AI and computer vision
Free trialData & analyticsMade in United KingdomPlatform for building custom AI training and evaluation data
Free trialData & analyticsMade in United States
Pros and cons
Pros
- Covers many languages and data types
- Off-the-shelf datasets plus custom projects
- Human review on labeled data
Cons
- No public pricing
- Custom projects go through sales
- Aimed at enterprises rather than individuals
Prompts & results
No prompts yet. Add your own prompt and output to help others use this tool.
Share a prompt
Reviews
Q&A
What is Defined.ai?
Defined.ai supplies multilingual, multimodal training data for machine learning and generative AI, through a dataset marketplace and custom collection, labeling and evaluation projects. Its customers are AI teams in automotive, finance, gaming, healthcare, retail and robotics.
Can I buy existing datasets from Defined.ai?
Yes. Its marketplace lists ready-made datasets, and custom collection or labeling can be ordered through sales.
Which data types does Defined.ai annotate?
It labels text, audio, image and video data, with expert verification and a model in the loop.
How much does Defined.ai cost?
Defined.ai is paid.
Is there a free version of Defined.ai?
No. Defined.ai is a paid tool.
What are the main features of Defined.ai?
Dataset marketplace, Text, audio, image and video annotation, Custom data collection, Model and data evaluation, Multilingual speech data, Developer API.
Who makes Defined.ai?
Defined.ai is made by Defined.ai.
What are the best alternatives to Defined.ai?
Popular alternatives include Scale AI, Appen, Apify.