Altasciences
Research clinicCypress, CA
Up to $32,450top listing seen Oct 24, 2026
See paid studies (opens in a new tab)Research clinic
A Springfield, Missouri research unit running studies with overnight stays and outpatient return visits.
Up to $10,300
Highest advertised payment we saw on their site, Oct 24, 2026.
Featured listings show “up to” amounts ($5,250 and $10,300 on Oct 23, 2026). The site says participants average $350–$500 per day.
See their paid studies (opens in a new tab)Advertised amounts are usually maximums. You may not qualify, may be kept as an alternate, or may receive less if you don’t complete every visit.
From the Money Guide · personal experience, 2024
The guide (2024) noted QPS studies in the $5,000–$8,000 range.
Study types
Link status: Working · checked Oct 23, 2026
Cypress, CA
Up to $32,450top listing seen Oct 24, 2026
See paid studies (opens in a new tab)Salt Lake City, UT · Lenexa, KS · San Antonio, TX
Up to $30,000top listing seen Oct 24, 2026
See paid studies (opens in a new tab)Baltimore, MD
Up to $26,300top listing seen Oct 24, 2026
See paid studies (opens in a new tab)