Polymarket vs Manifold
These two get compared because both call themselves prediction markets, and the label hides how little they overlap. Polymarket trades real dollars through an on-chain order book on Polygon. Manifold trades mana, a play currency, on markets anyone can create. Polymarket facts below date to 2026-07-09 from its own docs; Manifold facts were checked on its site and API docs 2026-07-24.
| Feature | Polymarket | Manifold |
|---|---|---|
| What it is | ||
| Stakes | Real money (USDC on Polygon) | Play money (mana) |
| Market creation | Curated by the platform | Anyone can create a market |
| Access | ||
| Account model | Funded crypto wallet | Ordinary account signup |
| Geo-restrictions | Blocked in US / UK / France / Germany / Italy / Netherlands / Belgium + more | None found on its site |
| KYC | No (intl) · Yes (Polymarket US) | No |
| Trading | ||
| Fees | Dynamic taker fee up to ~3.15%; makers rebated | No dollar fees; market creation costs mana |
| Auth to trade | Wallet EIP-712 + HMAC + per-order signing | API key |
| Developer access | ||
| API cost | Free | Free |
| Rate limit | Published per-endpoint limits | 500 requests/min per IP |
| WebSocket | Yes | Yes |
Source: docs.polymarket.com (CLOB introduction + geoblock, 2026-07-09) + manifold.markets and docs.manifold.markets/api (2026-07-24).
Real money changes what the prices mean
Polymarket's prices are set by people with dollars at stake, which is the standard argument for taking them seriously as probability estimates. Manifold's mana costs nothing to acquire at signup, so its prices lean on reputation and engagement incentives instead of capital risk.
Manifold hosts thousands of niche questions no real-money venue would ever list, because listing costs a user some mana rather than a compliance review. On the questions both platforms carry, Polymarket's book is usually the one traders quote.
Who can even use each one
Polymarket's international platform blocks the US, UK, France, Germany, Italy, the Netherlands, and Belgium, among others. Its separate CFTC-regulated arm, Polymarket US, launched in 2026 with full KYC for the domestic market. Manifold's site shows no comparable geo wall, which follows from the stakes: there's no real money to regulate.
If you're in a blocked country and want real-money exposure, Manifold won't substitute. If you want to practice forecasting or run a market for your community, it's the lower-friction door by far.
Building against each API
Manifold is the easy integration. A free API at api.manifold.markets, a plain API key, 500 requests a minute per IP, and you can read markets or place mana bets programmatically, with a WebSocket for live updates. One caveat from its docs: using API data to train commercial AI models requires a data license.
Polymarket's API is also free to read, but trading through it means EIP-712 wallet signatures layered on an HMAC handshake, with each order signed separately. Reading prices is easy on both; writing orders is where Polymarket demands real engineering.
Where each one fits
Choose by what the position is for. Money on an outcome means Polymarket, or Kalshi if you're in the US. Testing a forecasting model or running a market for your class or company means Manifold, where being wrong costs mana instead of rent. Plenty of people use both and would tell you they're barely competitors.
Common questions
Is Manifold real money?+−
Can I use Manifold in countries where Polymarket is blocked?+−
Which API is easier to build on?+−
Are Manifold's probabilities as reliable as Polymarket's?+−
Can I trade the same market on both and hedge?+−
Does Polymarket charge more than Manifold?+−
If it's the real-money data you're after
dino.markets doesn't touch Manifold. What it matches is the two real-money venues, Polymarket and Kalshi, event by event, serving both books through one keyed API with a confidence score on every pair.