# AI tools for “Human Annotation”

428 matching tools; showing 24, ranked by relevance.

| # | Tool Name | Monthly Visits | MoM Growth Rate | Pricing Model | Summary | Why it matched | Profile (Markdown) |
| :--- | :--- | :--- | :--- | :--- | :--- | :--- | :--- |
| 1 | [OpenTrain AI](https://openaitools.app/tool/opentrain-ai) | 1,469,348 | +11.2% | Contact for Pricing | Hire tested AI trainers and data labelers for RLHF, evaluation, and annotation | keywords 100%; semantic match | [.md](https://openaitools.app/tool/opentrain-ai.md) |
| 2 | [Appen](https://openaitools.app/tool/appen-com) | 665,840 | +0.2% | Contact for Pricing | Human-validated training data and evaluation services for frontier AI models | keywords 100%; semantic match | [.md](https://openaitools.app/tool/appen-com.md) |
| 3 | [Innovatiana](https://openaitools.app/tool/innovatiana) | 45,756 | +14.9% | Contact for Pricing | Innovatiana provides managed human data operations for AI — expert data labeling, annotation, RLHF and content moderation delivered by in-house trained specialists across computer vision, NLP, generative AI, audio and mu | keywords 100%; semantic match | [.md](https://openaitools.app/tool/innovatiana.md) |
| 4 | [Label Studio](https://openaitools.app/tool/label-studio) | 137,199 | -16.1% | Contact for Pricing, Free | Label any data. Evaluate any AI. | keywords 100%; semantic match | [.md](https://openaitools.app/tool/label-studio.md) |
| 5 | [Prolific](https://openaitools.app/tool/prolific-com) | 18,697,671 | -1.8% | Paid | High-quality human data for AI training, evaluation, and research | semantic match | [.md](https://openaitools.app/tool/prolific-com.md) |
| 6 | [clickworker](https://openaitools.app/tool/clickworker-com) | 1,861,149 | +0.5% | Contact for Pricing | Crowdsourcing data services for AI training and market data | keywords 62%; semantic match | [.md](https://openaitools.app/tool/clickworker-com.md) |
| 7 | [AI Data Collection Company (GTS)](https://openaitools.app/tool/ai-data-collection-company) | 13,006 | -17.5% | Contact for Pricing | Human-in-the-loop data collection and annotation for AI and ML models | keywords 100%; semantic match | [.md](https://openaitools.app/tool/ai-data-collection-company.md) |
| 8 | [Labelbox](https://openaitools.app/tool/labelbox) | 762,803 | -22.8% | Contact for Pricing | The environments frontier AI trains on, and the agents that do the recurring work | keywords 100%; semantic match | [.md](https://openaitools.app/tool/labelbox.md) |
| 9 | [Isahit](https://openaitools.app/tool/isahit) | 13,136 | +80.2% | Contact for Pricing | Ethical human-in-the-loop data labeling and AI validation | keywords 100%; semantic match | [.md](https://openaitools.app/tool/isahit.md) |
| 10 | [HumanizeAI.pro](https://openaitools.app/tool/humanizeai-pro) | 9,652,312 | +26% | Free | Free browser AI humanizer that rewrites AI text to read naturally | semantic match | [.md](https://openaitools.app/tool/humanizeai-pro.md) |
| 11 | [People for AI](https://openaitools.app/tool/people-for-ai) | 992 | -12.7% | Contact for Pricing | Human-annotated training data for computer vision and NLP | keywords 100%; semantic match | [.md](https://openaitools.app/tool/people-for-ai.md) |
| 12 | [SuperAnnotate](https://openaitools.app/tool/super-annotate) | 386,034 | +37.4% | Free Trial, Contact for Pricing | AI data infrastructure for building production-grade models | keywords 62%; semantic match | [.md](https://openaitools.app/tool/super-annotate.md) |
| 13 | [Roboflow](https://openaitools.app/tool/roboflow) | 1,431,204 | +6.6% | Freemium, Contact for Pricing | Build, train, and deploy computer vision for the physical world | keywords 62%; semantic match | [.md](https://openaitools.app/tool/roboflow.md) |
| 14 | [DataVLab](https://openaitools.app/tool/datavlab) | 12,740 | -7.8% | Contact for Pricing | ISO 27001 data annotation services for AI and ML teams in regulated industries | keywords 100%; semantic match | [.md](https://openaitools.app/tool/datavlab.md) |
| 15 | [Undetectable AI](https://openaitools.app/tool/undetectable-ai) | 3,113,403 | +17.5% | Freemium | Detect, humanize and verify AI content in one place | semantic match | [.md](https://openaitools.app/tool/undetectable-ai.md) |
| 16 | [Defined.ai](https://openaitools.app/tool/definedcrowd-com) | 146,251 | -21% | Contact for Pricing | Enterprise AI training data, annotation and evaluation services | keywords 62%; semantic match | [.md](https://openaitools.app/tool/definedcrowd-com.md) |
| 17 | [StealthWriter](https://openaitools.app/tool/stealthwriter) | 2,887,114 | +15.5% | Freemium | Humanize AI text and check how human it reads | semantic match | [.md](https://openaitools.app/tool/stealthwriter.md) |
| 18 | [Surge AI](https://openaitools.app/tool/surgehq-ai) | 245,142 | +6.6% | Contact for Pricing | Expert human data and evaluation for training frontier AI | semantic match | [.md](https://openaitools.app/tool/surgehq-ai.md) |
| 19 | [Invisible Technologies](https://openaitools.app/tool/invisible-technologies-inc) | 1,364,520 | +64.4% | Contact for Pricing | Enterprise AI infrastructure where software and expert humans work together | semantic match | [.md](https://openaitools.app/tool/invisible-technologies-inc.md) |
| 20 | [Outlier AI](https://openaitools.app/tool/outlier-ai) | 10,372,036 | +7.6% | Paid | Get paid to train the next generation of AI models | semantic match | [.md](https://openaitools.app/tool/outlier-ai.md) |
| 21 | [AI Humanize](https://openaitools.app/tool/ai-humanize) | 2,152,089 | +8.1% | Freemium, Paid | Turn AI-generated text into natural, human-sounding writing | semantic match | [.md](https://openaitools.app/tool/ai-humanize.md) |
| 22 | [Rev](https://openaitools.app/tool/rev) | 1,524,237 | -12.9% | Contact for Pricing | AI and human transcription, captions and investigative case analysis in one platform | semantic match | [.md](https://openaitools.app/tool/rev.md) |
| 23 | [Encord](https://openaitools.app/tool/encord-com) | 244,204 | +9.4% | Contact for Pricing | The multimodal data layer for computer vision and physical AI teams | keywords 62%; semantic match | [.md](https://openaitools.app/tool/encord-com.md) |
| 24 | [WriteHuman](https://openaitools.app/tool/writehuman) | 619,492 | +15.6% | Freemium, Paid | Humanize AI text into natural, human-sounding writing with a built-in detector | semantic match | [.md](https://openaitools.app/tool/writehuman.md) |

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