Free / Open-sourcePrivate AI chat from the makers of DuckDuckGo
C3 AI records 0 monthly visits with 0% month-over-month growth and Contact for Pricing pricing. Defined.ai records 146,251 monthly visits with -21% growth and Contact for Pricing pricing.

Enterprise AI platform and prebuilt applications for large organisations
| Dimension / Metric | ![]() | |
|---|---|---|
| Official Domain | c3.ai | definedcrowd.com |
| Pricing Model | Contact for Pricing | Contact for Pricing |
| Monthly Visits | 0 (0) | 146.25K (146,251) |
| MoM Traffic Delta | 0 (0%) | -38.82K (-21%) |
| Primary Market & Share | 🌐 Global (—) | 🇺🇸 United States (20.6%) |
| Direct Visits / mo | 0 | 84.42K |
| User Rating | 4.7 | 4.4 |
| Supported Platforms | Website | Website |

Enterprise AI platform and prebuilt applications for large organisations
A model-driven architecture that unifies data, analytics and applications around a shared ontology, so enterprise AI applications can be built and governed at scale.
A development environment where engineers and business analysts design, build and deploy enterprise AI applications, including natural-language-to-application generation with C3 Code.
Enterprise-grade generative AI grounded in proprietary data, returning cited answers across business functions and industries.
Production-ready applications encoding domain expertise across reliability, demand planning, production scheduling, process, inventory and sourcing optimization.
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.
Free / Open-sourcePrivate AI chat from the makers of DuckDuckGo
Free / Open-sourceOpen-source model and dataset hub with one-click online demos
Free / Open-sourceOpen-source model and dataset hub with one-click online demos

Free / Open-sourceUnbiased photo feedback from real people, for dating, business and social profiles
Free / Open-sourceUnbiased photo feedback from real people, for dating, business and social profiles
Free / Open-sourceStreamlines computer vision dataset annotation and model deployment, but lacks the broad human crowd-sourcing services of Defined.ai.
Free / Open-sourceStreamlines computer vision dataset annotation and model deployment, but lacks the broad human crowd-sourcing services of Defined.ai.

SpecialistWeb data infrastructure for scraping, proxies, and AI-ready datasets
SpecialistWeb data infrastructure for scraping, proxies, and AI-ready datasets

Comprehensive enterprise data labeling platform with powerful automation agents, but carries significant pricing overhead for smaller teams.
Comprehensive enterprise data labeling platform with powerful automation agents, but carries significant pricing overhead for smaller teams.

SpecialistAgent observability, evaluation, and continuous improvement for production AI
SpecialistAgent observability, evaluation, and continuous improvement for production AI
Advanced multimodal data infrastructure for computer vision teams, though specialized primarily in video and image annotation.
Advanced multimodal data infrastructure for computer vision teams, though specialized primarily in video and image annotation.

Human-AI workflow automation for business operations
Human-AI workflow automation for business operations

Free / Open-sourceAI workout planner that builds your whole training week around your gear and goals
Free / Open-sourceAI workout planner that builds your whole training week around your gear and goals

Free / Open-sourceOpen-source data labeling and evaluation platform offering full self-hosting control, but requires manual setup and infrastructure maintenance.
Free / Open-sourceOpen-source data labeling and evaluation platform offering full self-hosting control, but requires manual setup and infrastructure maintenance.