Prolific records 18,697,671 monthly visits with -1.8% month-over-month growth and Paid pricing. Tambo records 7,034 monthly visits with +3.7% growth and Freemium pricing.
High-quality human data for AI training, evaluation, and research
An open-source toolkit for adding AI agents to your React app
| Dimension / Metric | ||
|---|---|---|
| Official Domain | prolific.com | tambo.co |
| Pricing Model | Paid | Freemium |
| Monthly Visits | 18.7M (18,697,671) | 7.03K (7,034) |
| MoM Traffic Delta | -352.04K (-1.8%) | +250 (+3.7%) |
| Primary Market & Share | 🇺🇸 United States (48.8%) | 🇺🇸 United States (64.9%) |
| Direct Visits / mo | 12.98M | 2.78K |
| User Rating | 4.6 | 4.3 |
| Supported Platforms | Website | Website |
High-quality human data for AI training, evaluation, and research
Filter participants by detailed demographic, professional, and behavioural criteria and reach narrow or representative samples rather than a generic crowd.
Collect human preference data for model fine-tuning, run safety evaluations and red-teaming, and use a feedback API to plug humans into automated pipelines.
Attention checks, honesty screening, and approval workflows help filter out careless or fraudulent responses before you analyse results.
Publish a study and begin collecting responses quickly, with tooling that supports screening, quotas, and longitudinal designs.
An open-source toolkit for adding AI agents to your React app
Register your existing React components once and the agent renders them with the correct props, inheriting your styling, design system and business logic instead of inventing new markup.
Streaming, message threads, cancellation, error states, conversation storage and component state are handled for you, so AI features do not require rebuilding core app infrastructure.
The agent inherits the signed-in user's permissions and session, keeping AI features inside your existing security and authorisation boundaries.
Model Context Protocol integration on both sides connects the agent to external tools and data sources, with MCP OAuth support for authenticated servers.
Free / Open-sourceRun and build with open AI models locally or in the cloud
Free / Open-sourceRun and build with open AI models locally or in the cloud
Large consumer panel for market research surveys, but lacks Prolific's specialized focus on academic studies and AI tuning.
Large consumer panel for market research surveys, but lacks Prolific's specialized focus on academic studies and AI tuning.
Free / Open-sourceA free, open-source personal AI agent that learns your projects and works across every messaging app.
Free / Open-sourceA free, open-source personal AI agent that learns your projects and works across every messaging app.
Free / Open-sourceBuild, deploy, and govern production-ready agentic AI workflows
Free / Open-sourceBuild, deploy, and govern production-ready agentic AI workflows
SpecialistThe environments frontier AI trains on, and the agents that do the recurring work
SpecialistThe environments frontier AI trains on, and the agents that do the recurring work
Enterprise-grade data annotation and AI alignment workforce, but less self-serve for academic study recruitment and casual surveys.
Free / Open-sourceOpen-source frontend stack for building AI agents and copilots inside your own product
Free / Open-sourceOpen-source frontend stack for building AI agents and copilots inside your own product
SpecialistAI data infrastructure for building production-grade models
SpecialistAI data infrastructure for building production-grade models
SpecialistSpecializes in video-based consumer interviews and AI qualitative analysis, but less focused on quantitative academic survey panels.
SpecialistSpecializes in video-based consumer interviews and AI qualitative analysis, but less focused on quantitative academic survey panels.
SpecialistSources verified B2B professionals and healthcare experts for specialized research, but lacks broad general-population academic panels.
SpecialistSources verified B2B professionals and healthcare experts for specialized research, but lacks broad general-population academic panels.
Free / Open-sourceOpen-source AI automation that unifies agents, flows and 770+ app integrations
Free / Open-sourceOpen-source AI automation that unifies agents, flows and 770+ app integrations
Free / Open-sourceOpen-source workspace to build, deploy and govern AI agents
