alternatives · scale ai
Rapidata vs Scale AI
Scale AI publishes no prices; work starts with an intro call. Rapidata is an API you call yourself: send 1,000 image pairs, ask 10 people about each, and you have 10,000 votes for $40 within minutes.
- $4per 1,000 responses
- 300,000+responses per hour
- 190+countries
01fit
Best for / not for
Rapidata is best for
- Building diverse datasets: labels and preferences from thousands of different people, not a small annotation team.
- Real RLHF: direct human feedback in the training loop at GPU speed, not a reward model imitating people.
- Choosing a release candidate: private leaderboards that rank your checkpoints on each criterion separately, such as prompt alignment, aesthetics and style.
Rapidata is not for
- Expert or long-form data: SFT demonstrations, reasoning traces, specialist review.
- Work you want a vendor to design, staff and manage for you.
02at a glance
Side by side
| Rapidata | Scale AI | |
|---|---|---|
| What it is | An API: you send data and an instruction to people worldwide and get answers within seconds. | “Scale works across the AI stack, from the data that trains the models you rely on, to the systems that put them to work.”source: scale.com |
| Price | $4 per 1,000 responses, listed on the pricing page. | No public prices; the pricing page asks you to book an intro call.source: scale.com/pricing |
| Turnaround | Over 300,000 responses per hour, so a 10,000-response job finishes in minutes. | Not published on scale.com. |
03why teams look
Why teams look elsewhere
Procurement: Scale publishes no prices, so even a small evaluation run starts with a sales call. Independence: after Meta's minority investment in June 2025, some labs reviewed which vendors see their data.
FAQ
How much does a human evaluation run cost on Rapidata compared with Scale AI?
On Rapidata, 1,000 comparisons with 10 votes each is 10,000 responses, which costs $40 at the list price of $4 per 1,000. Scale AI does not publish prices; its pricing page asks you to book an intro call.
Sources
Competitor facts were last checked against these pages on 2026-11-06.