Appen records 665,840 monthly visits with +0.2% month-over-month growth and Contact for Pricing pricing. DealMachine records 410,500 monthly visits with +63.1% growth and Free Trial, Paid pricing.
Human-validated training data and evaluation services for frontier AI models
AI property data, skip tracing and direct mail for real estate investors
| Dimension / Metric | | |
|---|---|---|
| Official Domain | appen.com | dealmachine.com |
| Pricing Model | Contact for Pricing | Free Trial, Paid |
| Monthly Visits | 665.84K (665,840) | 410.5K (410,500) |
| MoM Traffic Delta | +1.1K (+0.2%) | +158.76K (+63.1%) |
| Primary Market & Share | 🇺🇸 United States (22%) | 🇺🇸 United States (94.1%) |
| Direct Visits / mo | 238.31K | 283.81K |
| User Rating | 4.4 | 4.3 |
| 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.
AI property data, skip tracing and direct mail for real estate investors
One search bar handles address lookups, owner lookups and plain-language list requests across 150M+ properties, 240M+ people and 50M+ company records.
Describe the campaign you want in natural language or upload a CSV, and the AI translates it into a precise property search with 800+ refinements such as equity, vacancy and ownership length.
Append verified phone numbers, emails and 100+ extra data fields to any property or contact list, then export to CSV or deliver it via API.
Tag distressed properties on the go, track routes for teams, capture photos and pull owner details instantly while still in the field.
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.
Combines robust data labeling tools with automated workflows, but focuses more on software tooling than managed human workforces.
Combines robust data labeling tools with automated workflows, but focuses more on software tooling than managed human workforces.
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.
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.
Features robust real estate wholesaling and lead generation tools, but lacks DealMachine's integrated direct mail marketing campaigns.
Features robust real estate wholesaling and lead generation tools, but lacks DealMachine's integrated direct mail marketing campaigns.
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.
Stronger at automated database nurturing and 1-on-1 follow-ups, but lacks comprehensive property record and mapping tools.
Stronger at automated database nurturing and 1-on-1 follow-ups, but lacks comprehensive property record and mapping tools.
Supplies expert human annotators for specialized training and evaluation datasets, but operates at a smaller scale.
Supplies expert human annotators for specialized training and evaluation datasets, but operates at a smaller scale.
