Free / Open-sourceOpen-source model and dataset hub with one-click online demos

Labelbox: Comprehensive enterprise data labeling platform with powerful automation agents, but carries significant pricing overhead for smaller teams. Defined.ai records 146,251 monthly visits with -21% month-over-month growth and Contact for Pricing pricing. Labelbox records 762,803 monthly visits with -22.8% growth and Contact for Pricing pricing.
Enterprise AI training data, annotation and evaluation services
| Dimension / Metric | ![]() | |
|---|---|---|
| Official Domain | definedcrowd.com | labelbox.com |
| Pricing Model | Contact for Pricing | Contact for Pricing |
| Monthly Visits | 146.25K (146,251) | 762.8K (762,803) |
| MoM Traffic Delta |
| -38.82K (-21%) |
| -225.17K (-22.8%) |
| Primary Market & Share | 🇺🇸 United States (20.6%) | 🇺🇸 United States (21.9%) |
|---|
| Direct Visits / mo | 84.42K | 370.02K |
|---|
| User Rating | 4.4 | 4.4 |
|---|
| Supported Platforms | Website | Website |
|---|
Enterprise AI training data, annotation and evaluation services
A large selection of ready-to-use, ethically sourced datasets across audio, image, video, text and multimodal formats, with advanced filtering and free samples.
Expert-verified labeling for text, audio, image and video using model-first, human-in-the-loop workflows for accuracy and fairness.
High-quality multilingual content for global AI systems, drawing on 500+ languages, dialects and locales.
Global, diverse data collection at scale for training, with privacy and security vetting on every dataset.

The environments frontier AI trains on, and the agents that do the recurring work
Structured annotation, curation, model evaluation and human-in-the-loop review across vision, language and generative tasks, used to build the training and eval data behind production models.
Recursion agents start on their own from builds, alerts, commits, checkpoints and schedules, then work in the background until the task is finished and reviewable.
Specialist agents cover software engineering, reliability, security, ML research, evals, R&D, product and finance workflows, from flaky test fixes to postmortem drafts and vulnerability patches.
Every agent run is scored by a grader, and graded sessions leave memories, notes and skills that the next session reads before acting, so quality compounds over time.
Free / Open-sourceOpen-source model and dataset hub with one-click online demos

SpecialistStreamlines end-to-end computer vision workflows from annotation to model deployment, but lacks Labelbox's general enterprise agent orchestration.
#2
SpecialistWeb data infrastructure for scraping, proxies, and AI-ready datasets
#3
SpecialistRelies heavily on managed human-in-the-loop workforce services for data validation, offering less self-serve technical tooling than Labelbox.
Delivers enterprise-grade labeling and model evaluation at massive scale, but often requires higher enterprise budgets than Labelbox.

Offers robust multimodal annotation and workflow automation, featuring slightly more intuitive data curation pipelines for computer vision teams.

SpecialistTrack, evaluate, and ship AI models and agents in one connected environment.


SpecialistAgent observability, evaluation, and continuous improvement for production AI
Specializes in advanced computer vision and physical AI data pipelines, though with a narrower focus than general text-and-image labeling.

Free / Open-sourceProvides a flexible open-source alternative for custom data labeling, but requires self-hosting and manual infrastructure maintenance.


SpecialistFocuses strictly on LLM evaluation, testing, and observability rather than raw data annotation and training dataset curation.

Provides expert human workforce for AI training and evaluation datasets, though with fewer automated labeling tools.
Free / Open-sourceOpen-source model and dataset hub with one-click online demos
SpecialistStreamlines end-to-end computer vision workflows from annotation to model deployment, but lacks Labelbox's general enterprise agent orchestration.
SpecialistWeb data infrastructure for scraping, proxies, and AI-ready datasets
Delivers enterprise-grade labeling and model evaluation at massive scale, but often requires higher enterprise budgets than Labelbox.
Offers robust multimodal annotation and workflow automation, featuring slightly more intuitive data curation pipelines for computer vision teams.
SpecialistTrack, evaluate, and ship AI models and agents in one connected environment.
SpecialistAgent observability, evaluation, and continuous improvement for production AI
Specializes in advanced computer vision and physical AI data pipelines, though with a narrower focus than general text-and-image labeling.
Free / Open-sourceProvides a flexible open-source alternative for custom data labeling, but requires self-hosting and manual infrastructure maintenance.
SpecialistFocuses strictly on LLM evaluation, testing, and observability rather than raw data annotation and training dataset curation.
Provides expert human workforce for AI training and evaluation datasets, though with fewer automated labeling tools.