Prolific

Prolific is a research-participant recruitment platform founded in 2014 by Oxford researchers Phelim Bradley and Katia Damer, and now headquartered in London. Unlike typical survey sites, it exists to connect academic and commercial researchers with vetted people who complete studies for money — increasingly including AI labs that need human data and feedback rather than only universities.

The company reports over 300,000 active participants (people who have taken a study in the last 90 days) and tens of thousands of researchers, with studies drawn from institutions across the US, UK and Europe. Its defining feature is a stated pay floor: researchers cannot list a study below £6 (roughly $8) per hour, and Prolific recommends £9. That floor, plus a detailed prescreening system and identity checks at onboarding, is what separates it from the open survey-router model where rates float to the bottom. It is a genuine earning platform, not a points economy.

You must be 18+ and living in a supported country — Prolific covers most of the OECD but excludes a handful (Turkey, Lithuania, Colombia and Costa Rica among them). You can register with an email, Google or Facebook account, but sign-ups run through a waitlist keyed to demographic demand rather than first-come-first-served, so access isn't always instant. Before your first study you clear a full identity check: email, SMS phone verification with a matching country code, a government photo ID through Onfido, a selfie video, and a linked PayPal account. Extra checks can surface later if an account is flagged.

Verification: government ID at signup — Prolific runs a full KYC pass (an Onfido ID scan plus a selfie video) before you can take a single paid study; it's stricter than any survey router, and it's exactly why the data — and the payouts — stay clean.

Prolific has one earning engine — research studies — but the work behind that label varies, and so do the rates. Studies are posted directly by researchers: no survey routers, no offer walls, no video or shopping tie-ins, and every one must clear the platform's £6/$8-an-hour floor.

• Surveys and questionnaires — the bread-and-butter; short opinion and psychology studies paying roughly £0.50–£5 for a few minutes, most landing in the £6–£12-an-hour range that's typical here.
• AI training and evaluation — a fast-growing category as labs pay for human feedback: rating model outputs, writing prompts, judging responses. These run longer and tend to pay toward the top of the range.
• Behavioural and cognitive tasks — decision-making games, reaction-time experiments and memory tests, usually well estimated for time so the effective rate holds up.
• Longitudinal and product studies — multi-part studies with scheduled follow-ups, plus occasional interviews or product tests that can pay £10–£20+ for a single session.

The real advantage isn't any single task — it's the mechanics. Prescreening filters you into studies you actually qualify for, so screen-outs are rarer than on router sites, and when a legitimate disqualification does happen Prolific compensates the time. The trade-off is volume: you earn only when a matching study is live for your demographic.

Support runs through a help-centre ticket system only — no phone line, no live chat, no social channels. That's the platform's real weak spot: replies are slow, with participants reporting anything from a few days to several weeks, and the queue only moves Monday to Friday, roughly 9am–5pm GMT. A searchable knowledge base handles the common questions — payments, rejections, account holds — well enough that many issues never need a ticket.

For everything else, the unofficial r/ProlificAc subreddit is the de facto help desk: a large, active community that surfaces study problems, researcher disputes and payment quirks faster than official support usually does. There's no official Discord or forum.

Prolific is deliberately thin on community. There are no participant forums, no built-in messaging, no leaderboards or gamification, and the only in-platform contact is a narrow researcher-to-participant channel for study-specific queries. The company treats you as a paid research subject rather than a member of a network, and the product reflects that.

The real gathering place is the unofficial r/ProlificAc subreddit, where participants swap alerts on high-paying studies, flag researchers to avoid, and compare notes on account holds and cashout timing. If you use Prolific seriously, it's worth keeping open alongside your dashboard.