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Appen vs Heartex

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AppenAI Annotation and Labeling
HeartexAI Annotation and Labeling
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AI Annotation and Labeling

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AI Annotation and Labeling

Overview
Focus
AI Annotation and Labeling
AI Annotation and Labeling
Product
AI training data platform providing annotation and labeling services for computer vision and NLP projects.
Enterprise data labeling platform built on Label Studio for managing annotation projects at scale with ML integration.
Headquarters
Sydney, Australia
San Francisco, California
Company size
1,001-5,000 employees
51-200 employees
Founded
2014
2019
Pricing details
Free options
Free trial
Free plan, Free trial
Source updated
Oct 29, 2026
Oct 29, 2026

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AI Annotation and Labeling