Appen records 665,840 monthly visits with +0.2% month-over-month growth and Contact for Pricing pricing. Skyelight records 0 monthly visits with 0% growth and Freemium, Contact for Pricing pricing.
Human-validated training data and evaluation services for frontier AI models
Pin feedback on any live page and hand it straight to your AI coding agent
| Dimension / Metric | | |
|---|---|---|
| Official Domain | appen.com | skyelight.ai |
| Pricing Model | Contact for Pricing | Freemium, Contact for Pricing |
| Monthly Visits | 665.84K (665,840) | 0 (0) |
| MoM Traffic Delta | +1.1K (+0.2%) | 0 (0%) |
| Primary Market & Share | 🇺🇸 United States (22%) | 🌐 Global (—) |
| Direct Visits / mo | 238.31K | 0 |
| User Rating | 4.4 | 4.5 |
| Supported Platforms | Website | Website |
Human-validated training data and evaluation services for frontier AI models
Chain-of-thought reasoning traces, SME-level RLHF, supervised fine-tuning demonstrations and adversarial red teaming for the most capable models.
Golden trajectories, RL environment design, failure-mode taxonomies and software-engineering-driven deep evaluation for autonomous agents.
Multilingual ASR and conversational speech data, expressive TTS annotation, vision-language model training data, video action labelling and voice-agent evaluation.
LiDAR point-cloud labeling, multi-camera sensor fusion, robot demonstration trajectories, world-model rollouts and embodied interaction logs.
Pin feedback on any live page and hand it straight to your AI coding agent
Comment on any element of any page — prototype, staging, localhost or production — so every thread is attached to the exact element it refers to.
Claude, Claude Code, Cursor, OpenAI Codex, Grok, Windsurf, Lovable and Bolt can list threads, apply fixes and reply with the commit that closed them.
Comments are classified as they are typed — bug, feedback, idea, design inspiration or page copy — and can be sorted or bulk-managed by type.
Publish Claude artifacts or design surfaces to a hosted link; external reviewers join free and their comments land back in your workspace.
SpecialistConnects teams directly with verified human participants for preference tuning and studies, but lacks managed end-to-end labeling pipelines.
SpecialistConnects teams directly with verified human participants for preference tuning and studies, but lacks managed end-to-end labeling pipelines.
Blends custom software with dedicated human expert teams to handle complex operations, but operates as a bespoke service.
Blends custom software with dedicated human expert teams to handle complex operations, but operates as a bespoke service.
The environments frontier AI trains on, and the agents that do the recurring work
The environments frontier AI trains on, and the agents that do the recurring work
Provides enterprise-grade AI training data and model evaluation at massive scale, but often with higher enterprise pricing.
Provides enterprise-grade AI training data and model evaluation at massive scale, but often with higher enterprise pricing.
Screen recorder that captures bugs with full technical context
Screen recorder that captures bugs with full technical context
Delivers advanced multimodal data curation and annotation infrastructure, but requires your own annotation workforce for labeling tasks.
Delivers advanced multimodal data curation and annotation infrastructure, but requires your own annotation workforce for labeling tasks.
Agentic product management system for customer-driven roadmaps
SpecialistAgent observability, evaluation, and continuous improvement for production AI
SpecialistAgent observability, evaluation, and continuous improvement for production AI
SpecialistThe multimodal data layer for computer vision and physical AI teams
SpecialistThe multimodal data layer for computer vision and physical AI teams
Offers pre-packaged AI training datasets and custom data collection services, but with a smaller global crowd than Appen.
Offers pre-packaged AI training datasets and custom data collection services, but with a smaller global crowd than Appen.
Free / Open-sourceProvides a flexible open-source annotation platform for self-hosting, but lacks Appen's managed enterprise human workforce services.
Free / Open-sourceProvides a flexible open-source annotation platform for self-hosting, but lacks Appen's managed enterprise human workforce services.
Agentic AI QA engineer for web, iOS, and Android testing
Agentic AI QA engineer for web, iOS, and Android testing
