COMPARE
CrowdOS vs Synthetic Users. A panel that disagrees.
MCP is on every plan, Free included. The panel is drawn from census data and disagrees with itself. Synthetic Users describes itself as user research at the speed of AI: a way to simulate how any audience thinks, decides and reacts.
WHO IT IS FOR
A census panel an agent can call.
CrowdOS is the crowd an agent queries. MCP is on every plan, Free included. Each respondent is a persistent persona sampled from census distributions. The panel disagrees with itself.
Synthetic Users describes itself as user research at the speed of AI, and as a way to simulate how any audience thinks, decides and reacts. Its public pages describe multi-agent respondents with OCEAN personality profiles.
WHAT CROWDOS FIELDS
These are the CrowdOS facts. Synthetic Users' public description is in the section above.
01
MCP on every plan, Free included.
An AI agent calls run_focus_group, run_debate, compare_options, estimate_reach, preview_cost and the rest of the study tools. Free is up to 20 respondents, 5 requests a minute and a $5 monthly MCP spend ceiling. Pro is 500 respondents, 30 requests a minute and $500. Max is 1,000 respondents, 120 requests a minute and $2,500. Pricing instruments and MaxDiff are on Pro and Max. The REST API is Enterprise-only. Studies draw the wallet at the same rates as the web: Pulse at $0.02 a respondent, Screening Room from $0.025, Ads Labo at $0.015. A small focus group costs about $0.40.02
A census panel that disagrees.
Each respondent is a persistent persona sampled from census distributions, with a demographic identity that survives across studies. The panel disagrees with itself. One model role-playing a panel is one voice.03
The studies CrowdOS already sells.
Pulse is a vote, a debate, or a comparison. Screening Room pressure-tests a creative, a concept, or a deck. Ads Labo is a forced choice among two to four ad variants. Van Westendorp and Gabor-Granger read a price. MaxDiff orders messages, claims, reasons or criteria, on Pro and Max.
THE OPINION BENCHMARK
The published opinion benchmark.
On the Pew opinion benchmark, the crowd's opinion distribution matches published polling at 93.3% parity, with a mean absolute error of 3.36 percentage points and a Pearson r of 0.984. That figure measures opinion. Creative ranking against a live campaign is a separate measurement.
THE CROWD
Census distributions, then the question.
The crowd is drawn from census distributions across 24 markets.
WHERE THIS FITS
The same crowd, asked a different question.
Pulse, Screening Room, Ads Labo and the pricing instruments run on this crowd. MCP is on every plan, Free included.
FAQ
How does CrowdOS compare with Synthetic Users?
CrowdOS vs Synthetic Users comes down to how the study runs. CrowdOS puts MCP on every plan, Free included, so an agent calls run_focus_group against a census-grounded panel that disagrees with itself. Synthetic Users describes itself as user research at the speed of AI, with multi-agent respondents and OCEAN personality profiles. On the Pew opinion benchmark, the crowd's opinion distribution matches published polling at 93.3% parity, with a mean absolute error of 3.36 percentage points and a Pearson r of 0.984.
What are alternatives to Synthetic Users?
A Synthetic Users alternative on this site is CrowdOS: MCP on every plan, Free included, and a census panel that disagrees with itself. Aaru is a public product in behavior simulation. The Aaru comparison is on its own page.
Can an AI agent run a CrowdOS study?
Yes. On every plan, Free included, the agent calls the MCP server. A small focus group costs about $0.40. Free is up to 20 respondents, 5 requests a minute and a $5 monthly MCP spend ceiling.
Ask the crowd from the agent you already use.
MCP is on every plan, Free included. The panel disagrees with itself.