Institutional grade, prediction market data and trading infrastructure.
Joined October 2025
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Predictefy Public Beta is Live.
Trade, track, arbitrage and compare every prediction market, in one place.
Trade responsibly.
Predictefy’s platform and API users are not affected by this issue.
While Predictefy integrates Polymarket markets, our infrastructure operates independently of Polymarket’s frontend.
We've identified & fixed an issue impacting our international platform, Polymarket.com. One of our 3rd party providers was compromised, and we have referred this to relevant law enforcement.
Anyone who has been impacted will be made whole.
Out of an abundance of caution, we have temporarily halted trading & are working to bring the platform back online.
Predictefy retweeted
Polymarket.com: The exchange is currently in cancel-only mode and relayer actions paused while we investigate an incident.
We're aware of an outage and are looking into it.
status.polymarket.com/cmvtus…
Excited to be powering @poly_baskets with Predictefy's prediction market API.
From real-time market data to the infrastructure behind their indexes, we're helping builders bring new prediction market products to life.
One API, every prediction market.
Happy to share that PolyBaskets is now powered by @Predictefy's Institutional-grade market data
Powering the markets behind our indexes, real-time prices, and the next phase of growth.
One position. Many markets. Bigger possibilities 👇
Predictefy does not use PHP anywhere in our tech stack, and our platform is not affected. Our users are safe.
TOKEN2049 Singapore is a Wrap! 🇸🇬
Great meeting builders, traders, customers, and partners, and people we’ve been speaking to online for the past year.
Some familiar faces, and a lot of new ones.
You can still find us at the side events.
Predictefy retweeted
You wouldn't pay full price on an item at one store when it's cheaper somewhere else.
The same should apply in prediction markets.
Line shop.
Predictefy retweeted
Polymarket has 50% more crypto open interest, while Kalshi is generating 11.3x more notional volume.
We broke down the data across open interest, notional volume, and short-duration executed flow.
A deep dive into Kalshi vs Polymarket across crypto prediction markets. 🧵
Polymarket has 50% more crypto open interest, while Kalshi is generating 11.3x more notional volume.
We broke down the data across open interest, notional volume, and short-duration executed flow.
A deep dive into Kalshi vs Polymarket across crypto prediction markets. 🧵
7/ The Kalshi OI breakdown explains part of the apparent disconnect.
Across the Sept. 1–20 EOD sample:
• Long-dated OI averaged $22.20M
• Hourly OI averaged $0.95M
• Pre-TGE OI averaged just $0.03M
• Total crypto OI averaged $23.18M
Long-dated markets therefore represented roughly 96% of average Kalshi crypto OI.
Meanwhile, the shortest-duration markets closed with zero EOD OI on every measured day.
So a large amount of Kalshi’s short-duration volume is generated, settled and disappears from OI.
8/ That creates a clear structural divergence:
Polymarket has the larger total crypto OI: $38.57M vs $25.63M.
But Kalshi dominates short-duration turnover: $2.76B vs $227.94M over Sept. 1–21.
In other words:
Kalshi’s crypto market-share advantage is being driven heavily by short-duration turnover that does not remain in open interest after settlement.
Polymarket, by contrast, carries more outstanding crypto exposure while generating materially less short-duration flow.
Aggregate OI and volume establish that divergence.
They do not, by themselves, determine whether the excess turnover is organic, incentive-driven, or wash activity.
Polymarket US has flipped Polymarket notional volume for the first time.
September Notional Volume:
1. Polymarket US - $2,994,169,131
2. Polymarket - $2,270,776,406
It comes as Polymarket ramps up efforts to scale its US business, with NFL season driving a new wave of sports-market activity.
Polymarket has also climbed to the top of the sports app download charts.
Source: predictefy.com/en/analytics
Predictefy retweeted
best odds only possible on @predofficial.
$100 on Chelsea to beat Arsenal.
Payouts on prediction markets vs sportsbooks:
1. @SX_Bet - $533
2. @predofficial - $526
3. @bet_105 - $517
4. @Novig - $513
5. @ProphetX - $512
6. @Polymarket - $505
7. @FanDuel - $500
8. @Kalshi - $496
9. @predictdotfun - $490
10. @Duelbits - $490
11. @DraftKings - $490
12. @Stake - $490
13. @trylimitless - $477
14. @Bet365 - $475
15. @Betfair - $471
Prediction markets currently offer some of the strongest Chelsea moneyline payouts, with SX Bet leading at $533.
Among sportsbooks, Duel Bits offers the highest payout at $500.
$100 on Chelsea to beat Arsenal.
Payouts on prediction markets vs sportsbooks:
1. @SX_Bet - $533
2. @predofficial - $526
3. @bet_105 - $517
4. @Novig - $513
5. @ProphetX - $512
6. @Polymarket - $505
7. @FanDuel - $500
8. @Kalshi - $496
9. @predictdotfun - $490
10. @Duelbits - $490
11. @DraftKings - $490
12. @Stake - $490
13. @trylimitless - $477
14. @Bet365 - $475
15. @Betfair - $471
Prediction markets currently offer some of the strongest Chelsea moneyline payouts, with SX Bet leading at $533.
Among sportsbooks, Duel Bits offers the highest payout at $500.