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Prolific
Two-sided human-data marketplace · UK · founded 2014 · YC S19 · $32M Series A
👤 Ekaterina Damer & Phelim Bradley (Two Oxford/Sheffield PhDs who lived the pain of junk study data — so they vetted the supply side rivals ignored. Bradley now CEO.)🌐 siteLinkedInLinkedIn

Built to fix junk academic survey data. Then the AI boom made 'verified humans' the scarcest input in tech.

Will it work? · our read
Vetted supply wins. The moat isn't code — it's a decade-built pool of ID-verified, fairly-paid humans. AI labs now pay far more for that pool than academics ever did.
01How the money moves
Researcher or AI lab funds a study or annotation task
Vetted participants complete it, paid a fair wage (about 70%)
Prolific keeps a 33-43% platform fee on top
02The numbers
about $18M
2024 revenue
Latka
42.8%
corporate take rate
prolific.com
200K+
active participants
prolific.com
GMV (participant payouts) is far larger and pass-through; the platform fee is the real revenue. Prolific pricing
about $18M rev (2024, Latka) · participant payouts far larger (GMV)
03Weight class — CENTStap an axis
ControlEntryNeedTimeScale
Control Mid
Owns its platform and sets a 33-43% fee, but big AI labs concentrate spend and could in-source their own pools.
04The key move
Vet the supply side
MTurk chased cheap labor. Prolific did the opposite: ID-verify each participant, pay fair, cull bad accounts. That slow, curated pool yields far cleaner data — now the asset AI labs pay a premium for.
fact
The counter-intuitive move
But fairness caps supply and pushes the fee to 43%. If labs decide they can vet cheaper in-house, that premium erodes fast.
our read
05Where the moat is
Two-sided marketplace matching researchers and AI labs with vetted, fairly-paid human participants for a 33-43% fee.
200K+ ID-verified human poolDecade of fair-pay reputationNeutral vs Meta-owned Scale AI4x cleaner data than MTurk
06How it diesmedium confidence
Dies if big AI labs build their own vetted panels — they have the cash and motive to cut a 43% middleman. Or if synthetic data gets 'good enough' and the whole 'verified human' premium collapses. our read
Show evidence · counter
Evidence: Scale AI, Surge and Mercor chase the same AI-data budgets; Meta's Scale stake shows labs will integrate vertically.
Counter: Neutrality is now a selling point — after Meta bought into Scale AI, labs want a supplier no competitor owns.
07Against rivals
Prolific42.8% fee, vetted
Scale AI (Outlier)enterprise, Meta-tied
CloudResearchpanel + fee
MTurk20-40%, bot-heavy
Bars = verified-human data quality, not company size. Scale is bigger but Meta-tied; MTurk is cheapest but bot-heavy. our read
08Who uses it
Academic behavioral labsUX & market researchersAI labs (RLHF, evals)Model red-teaming teamsData-annotation buyers
Would it work for you?
Could you assemble a supply pool so vetted that buyers can't get it anywhere else?
Their moat was boring vetting, not features. Can you gather a trusted supply others can't? We don't score you — you answer.
🚀Use it as a launchpada prompt for your own AI
Copy → paste into your AI → then develop it freely in the conversation.
You are a sharp, honest startup strategist. Use the proven case below as a launchpad for MY idea — help me find my own angle, not copy it. <my_profile> Domain I know: [your domain] My unfair advantage (access/audience): [your edge] Interests: [your interests] Resources & goal: [your resources] · [your goal] </my_profile> <case name="Prolific" model="marketplace"> What it does: Two-sided marketplace matching researchers and AI labs with vetted, fairly-paid human participants for a 33-43% fee. Why it won (moat): A decade-built pool of 200K+ ID-verified humans that bots and cheap panels can't replicate. Weakest axis (CENTS): High take rate and buyer concentration — big AI labs could in-source their own panels. How it could die: Synthetic data gets 'good enough,' or labs vertically integrate and cut the middleman. </case> <task> Be a skeptical operator, not a cheerleader. No generic startup platitudes. If my angle is weak, say so plainly. First, a reality check: markets like this mostly fail. State the honest base rate (how crowded/hard is this?) and the ONE specific thing that would have to be true for ME to be the exception — grounded in my profile above. Then a compact table: - Fit — does this pattern suit my edge, or fight my gap? - Angle — my sharpest differentiation vs Prolific (concrete, not "better UX") - Distribution — exactly where my first 100 users come from (this is the hardest part — be specific, not "content marketing") - Risk — its "how it dies" (above) in MY situation Finish with one line: "The single thing to do next." Use only the facts above; if data is thin, say so — never invent numbers. Then stay with me and go deeper on whatever I ask — tech stack, rough cost & time, the smallest MVP to test, pricing, or timing. </task>
✓ Copied — paste into your AI
👤Placeholders like [your domain] auto-fill from your profile — example values for now.Set up profile →
Sourcesupdated · daily
Revenue is not officially disclosed. Latka cites about $18M (founder-shared, unverified — treat as estimate). Sacra estimates roughly $350M annualized by 2026 on the AI-data surge — a third-party estimate, not a filing, so I did not headline it. Participant payouts (GMV, tens of millions of pounds) are pass-through, not revenue; the 33-43% fee is the revenue. Prolific bootstrapped 2014-2019, then took YC (2019) and a $32M/£25M Series A (2023) — not a pure bootstrap. The 4x data-quality edge over MTurk comes from peer-reviewed studies, not Prolific marketing. No fabricated drama: the win is a decade of unglamorous supply-side vetting that the AI boom repriced. We never score you.