Good Judgment Open review
Free forecasting tournament platform run by the team behind superforecasting research.
We only link out to brands that accept users from your country.
Good Judgment Open at a glance
Platform type
Prediction Market
Markets
Politics, World Events, Economics, Technology
Funding
Fiat
Currencies
Not confirmed
Founded
2015
Headquarters
USA
KYC
Not required
Minimum age
18
Our Good Judgment Open review
Good Judgment Open is the public arm of the research programme that produced the superforecasting literature, and it is the best free way to test your own calibration. You forecast probabilities on real geopolitical and economic questions and get scored with Brier scores against everyone else. There is no money involved, which is precisely why it is available everywhere.
What you can predict
How it works
You submit a probability estimate on open questions and update it as events develop. Accuracy is scored over time, and leaderboards rank forecasters.
Liquidity and market depth
Not applicable — this is a forecasting tournament, not a traded market.
Fees
Trading fees
Free
Deposit fees
Not applicable
Withdrawal fees
Not applicable
Settlement fees
Not confirmed
Network fees
Not confirmed
Other
Not confirmed
Deposits and withdrawals
Methods
Not confirmed
Minimum deposit
None
Minimum withdrawal
Not confirmed
Deposit time
Not confirmed
Withdrawal time
Not confirmed
Withdrawal fees
Not confirmed
Mobile experience
iOS app
No
Android app
No
Mobile web
Yes
Mobile web.
Where is Good Judgment Open available?
Status is reviewed manually per country. Unknown means we have not confirmed it yet.
| 🇦🇷 Argentina | Available |
| 🇦🇺 Australia | Available |
| 🇧🇷 Brazil | Available |
| 🇨🇦 Canada | Available |
| 🇨🇱 Chile | Available |
| 🇨🇴 Colombia | Available |
| 🇪🇬 Egypt | Available |
| 🇫🇷 France | Available |
| 🇩🇪 Germany | Available |
| 🇬🇭 Ghana | Available |
| 🇮🇳 India | Available |
| 🇮🇩 Indonesia | Available |
| 🇮🇪 Ireland | Available |
| 🇮🇹 Italy | Available |
| 🇯🇵 Japan | Available |
| 🇰🇪 Kenya | Available |
| 🇲🇽 Mexico | Available |
| 🇳🇱 Netherlands | Available |
| 🇳🇿 New Zealand | Available |
| 🇳🇬 Nigeria | Available |
| 🇳🇴 Norway | Available |
| 🇵🇰 Pakistan | Available |
| 🇵🇪 Peru | Available |
| 🇵🇭 Philippines | Available |
| 🇵🇱 Poland | Available |
| 🇵🇹 Portugal | Available |
| 🇸🇬 Singapore | Available |
| 🇿🇦 South Africa | Available |
| 🇰🇷 South Korea | Available |
| 🇪🇸 Spain | Available |
| 🇸🇪 Sweden | Available |
| 🇨🇭 Switzerland | Available |
| 🇹🇿 Tanzania | Available |
| 🇹🇭 Thailand | Available |
| 🇹🇷 Turkey | Available |
| 🇺🇬 Uganda | Available |
| 🇦🇪 United Arab Emirates | Available |
| 🇬🇧 United Kingdom | Available |
| 🇺🇸 United States | Available |
| 🇻🇳 Vietnam | Available |
Regulation and company
Operator
Good Judgment Inc.
Parent company
Not confirmed
Regulator
Not applicable
Licence
None required
No money changes hands, so no gambling or financial licence applies. Open worldwide.
Settlement and dispute resolution
Questions resolve against published sources on a stated resolution date.
Customer support
Hours
Business hours
Email and an active forum community.
Pros
- ✓Free and open worldwide
- ✓Rigorous Brier scoring
- ✓Excellent for building calibration
Cons
- ✕No money to be made
- ✕Slower than traded markets
- ✕Limited question volume
Similar sites available in your country
We have not confirmed alternatives for this country yet.
Good Judgment Open FAQs
Does Good Judgment Open cost anything?
No, it is free and no money is staked.
Is it available in my country?
Yes, it is open worldwide because no wagering is involved.