Respondent

50–400+ USD/studyPay per hour unless stated otherwise

4.4/5Rating, source further down

Some roles from SwedenAvailability from Sweden

Some roles from Sweden

Pay: 50–400+ USD/study
50-400+ USD per study (most common 50-250, senior B2B 400+; average 75 USD) per project (per the platform)
Type of work: Market research, user interviews, focus groups, quantitative surveys
Requirements: Verified identity; many studies target specific professional roles (PM, CFO, RN).
Payout: Tremendous; payout within a few days of a verified session
Unpaid tests: no
From Sweden: Limited. Example studies are explicitly labelled US only, North America, open to UK, US, AU. 4.3 M+ verified participants. This is market research, not AI training.
Rating: 4.4/5 (900+) Source: Trustpilot, linked from respondent.io (self-published)
Known problem: Most examples are US/UK/AU/North America; Swedes are matched mainly on Nordic B2B profiles.
Status: active

Referral program

Referral program: 50 USD per friend who joins, verifies identity and earns 75 USD in studies. No upper limit. Paid via Tremendous, 7-10 days. (the program's own terms)
The website explicitly says "no cap" (checked, but the help centre's referral policy states 20 USD at registration and a cap of 5 per project. We follow the website: it is newer and unambiguous, and it is what the reader meets when they click. "Spam or misleading promotion is prohibited." Sweden is not among the 21 primary recruitment countries, but is in the broader worldwide list.