Here is an updated version #3 of the “prediction market database” started by Jacob Lagerros and updated by Nuño Sempere:
https://docs.google.com/spreadsheets/d/1vGjnJPxdnBKwag3Q9Uy_LdVAARaSHrI5CWiYKH7dV9s/edit?usp=sharing
These are almost certainly not every single prediction market in existence or that was ever created, but an attempt to catalogue as much as possible. Please add any that you see are absent.
This list uses a very broad definition of “prediction market,” so forecasting platforms like Metaculus are included much to their dismay. Exchanges that offer binary event contracts on an event, particularly the 2024 U.S. Presidential election, are also included.
Note: Be cautious with all hyperlinks. Platforms may fold and malicious actors poach the domain.
You can add or edit prediction markets by commenting on the Google Sheet. And feel free to download, copy, or otherwise do as you wish with the information.
A breakdown of public prediction markets as of 7/15/2025:
| Category | Overall | Operating | pre-2020 | 2020-2025 |
| Real-money | 80 | 30 | 61 | 19 |
| Crypto | 337 | 158 | 36 | 301 |
| Play-money & forecasting | 119 | 25 | 97 | 20 |
| TOTAL | 536 | 213 | 194 | 340 |
As we can see in the chart below, there has been a dramatic growth in the number prediction markets in the last five years is driven by the growth of blockchain-based (“crypto”) markets.
In this chart, we see how challenging it is for prediction markets to survive long term. A majority of prediction markets operating today were founded in the past 5 years. Note that not all “Inoperative” markets are defunct; some are still in development or simply never launched.
Historical sources
Lists:
Database of Prediction Markets[v2] by Nuño Sempere
Map of the Prediction Market & Forecasting Ecosystem by Saul Munn
DefiLlama
RootData
Mentibus
Prediction Market: toolkits
Articles:
“A (long) review of prediction market software” by Jed Christiansen
Timeline of prediction markets by Issa Rise
“Prediction Markets in The Corporate Setting” by Nuño Sempere
“Prediction Markets as a Way to Manage Acquisition Programs” by Joshua M. Dishmon
“Corporate prediction markets: a roundup of the major players” by Alistair Roache
Blogs:
Prediction Markets Google Group
Consensus Point blog
CrowdCast blog
Oddhead Blog by David Pennock
Further research
Version 3 of PMDB doesn’t list when a market ceased to exist. We have the estimated founded year and whether or not the market is operating today (July 15, 2025). To measure the life-cycle of prediction markets, the ‘Ended’ year could be added using estimates from the Wayback Machine or the final tweet date from the market’s Twitter/X account.
Tracking down the founders and collecting historical market data from certain platforms could be interesting to gauge the accuracy of these markets, particularly ones dedicated to niche topics like terrorism or crop yields.