SpecialistConnects teams directly with verified human participants for preference tuning and studies, but lacks managed end-to-end labeling pipelines.

Apify records 4,147,762 monthly visits with +3.9% month-over-month growth and Freemium, Contact for Pricing pricing. Appen records 665,840 monthly visits with +0.2% growth and Contact for Pricing pricing.

Human-validated training data and evaluation services for frontier AI models
| +156.83K (+3.9%) |
| +1.1K (+0.2%) |
| Primary Market & Share | 🇺🇸 United States (22.2%) | 🇺🇸 United States (22%) |
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| Direct Visits / mo | 1.82M | 238.31K |
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| User Rating | 4.6 | 4.4 |
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| Supported Platforms | Website | Website |
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Run thousands of ready-made web scrapers and AI agents from one cloud platform
Over one hundred thousand ready-to-run scrapers and automation tools covering social media, maps, e-commerce, real estate, and general web crawling.
Connect Apify Actors directly to AI assistants and agents so they can search the store, run scrapers, and pull structured results as tool calls.
Managed proxy rotation and unblocking are built into the platform, so scrapers keep working when target sites add defenses.
An open-source crawling library plus Python and JavaScript SDKs for building custom Actors with Playwright, Puppeteer, Selenium, or Cheerio.

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.
SpecialistConnects teams directly with verified human participants for preference tuning and studies, but lacks managed end-to-end labeling pipelines.

Free / Open-sourceOpen-source workflow automation built for AI agents and technical teams
#2Free / Open-sourceProvides direct LLM-ready markdown conversion via API, but lacks Apify's massive marketplace of pre-built scraping actors.
#3
Blends custom software with dedicated human expert teams to handle complex operations, but operates as a bespoke service.

SpecialistBuild GTM systems that turn data into revenue

Offers enterprise-grade proxy networks and raw web data infrastructure, but lacks Apify's plug-and-play actor marketplace.

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.

Delivers advanced multimodal data curation and annotation infrastructure, but requires your own annotation workforce for labeling tasks.
SpecialistAutomates complex business workflows with AI agents, but is less specialized for raw large-scale web scraping actors.

SpecialistFocuses heavily on pre-built social media automation and lead generation workflows rather than general web scraping.

SpecialistAgent observability, evaluation, and continuous improvement for production AI
SpecialistConnects teams directly with verified human participants for preference tuning and studies, but lacks managed end-to-end labeling pipelines.
Free / Open-sourceOpen-source workflow automation built for AI agents and technical teams
Free / Open-sourceProvides direct LLM-ready markdown conversion via API, but lacks Apify's massive marketplace of pre-built scraping actors.
Blends custom software with dedicated human expert teams to handle complex operations, but operates as a bespoke service.
Offers enterprise-grade proxy networks and raw web data infrastructure, but lacks Apify's plug-and-play actor marketplace.
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.
Delivers advanced multimodal data curation and annotation infrastructure, but requires your own annotation workforce for labeling tasks.
SpecialistAutomates complex business workflows with AI agents, but is less specialized for raw large-scale web scraping actors.
SpecialistFocuses heavily on pre-built social media automation and lead generation workflows rather than general web scraping.
SpecialistAgent observability, evaluation, and continuous improvement for production AI