What is the best Probly alternative overall?

Kalshi — it scores 9.1/10 across fees, liquidity, ease of use and trust, and is our top pick for most traders leaving Probly.

Are these Probly alternatives regulated?

Regulation varies: Kalshi — CFTC-regulated exchange (USA); Polymarket — CFTC-registered (via QCX); Manifold Markets — Play-money (US charity spin-off for cash).

Best Probly alternatives in 2026

The largest prediction market in the world

Top pick: Kalshi

If you want the closest drop-in replacement for Probly, Kalshi (9.1/10) is the strongest alternative on fees, liquidity and trust. Below we rank every viable option and show a side-by-side comparison against Probly.

Visit Site — Kalshi Probly vs Kalshi

Probly vs the alternatives

Platform	Overall	Fees	Regions	Regulation
Probly	9.4	0% trading fees	Global (excl. some jurisdictions)	CFTC-registered (via QCX)
Kalshi	9.1	Up to 2% (variable)	USA + expanding internationally	CFTC-regulated exchange (USA)	Review →
Polymarket	8.8	0% trading fees	Global (excl. some jurisdictions)	CFTC-registered (via QCX)	Review →
● Manifold Markets	8.7	Free play, tips on cash	Global	Play-money (US charity spin-off for cash)	Review →
★ Metaculus	8.6	Free	Global	Forecasting platform (non-monetary)	Review →
◈ Zeitgeist	7.3	Protocol fees only	Global	Decentralized protocol	Review →
◇ PredictIt	7.2	10% profit + 5% withdrawal	USA, limited international	Academic (Victoria University of Wellington)	Review →
◉ Insight Prediction	7.1	Low variable fees	Global (varies)	Sweeps-model / crypto	Review →

Probly

9.4/10 · 0% trading fees

Global (excl. some jurisdictions) · CFTC-registered (via QCX)

Kalshi

9.1/10 · Up to 2% (variable)

Review →

USA + expanding internationally · CFTC-regulated exchange (USA)

Polymarket

8.8/10 · 0% trading fees

Review →

Global (excl. some jurisdictions) · CFTC-registered (via QCX)

●

Manifold Markets

8.7/10 · Free play, tips on cash

Review →

Global · Play-money (US charity spin-off for cash)

★

Metaculus

8.6/10 · Free

Review →

Global · Forecasting platform (non-monetary)

◈

Zeitgeist

7.3/10 · Protocol fees only

Review →

Global · Decentralized protocol

◇

PredictIt

7.2/10 · 10% profit + 5% withdrawal

Review →

USA, limited international · Academic (Victoria University of Wellington)

◉

Insight Prediction

7.1/10 · Low variable fees

Review →

Global (varies) · Sweeps-model / crypto

Ranked: the best Probly alternatives

1
Kalshi
9.1/10
The regulated home of US event trading
Better than Probly for: smoother UX, stronger trust & regulation.
Visit Site — Kalshi Full Kalshi review Compare with Probly
2
Polymarket
8.8/10
The largest prediction market in the world
Better than Probly for: regional availability and platform variety.
Visit Site — Polymarket Full Polymarket review Compare with Probly
3
●
Manifold Markets
8.7/10
Community-driven markets on literally anything
Better than Probly for: lower fees, wider market variety.
Visit Site — Manifold Markets Full Manifold Markets review Compare with Probly
4
★
Metaculus
8.6/10
Serious forecasting for serious questions
Better than Probly for: lower fees, stronger trust & regulation.
Visit Site — Metaculus Full Metaculus review Compare with Probly
5
◈
Zeitgeist
7.3/10
Decentralized prediction markets on Polkadot
Better than Probly for: regional availability and platform variety.
Visit Site — Zeitgeist Full Zeitgeist review Compare with Probly
6
◇
PredictIt
7.2/10
The classic US political prediction market
Better than Probly for: regional availability and platform variety.
Visit Site — PredictIt Full PredictIt review Compare with Probly
7
◉
Insight Prediction
7.1/10
The scrappy challenger to Polymarket & Kalshi
Better than Probly for: regional availability and platform variety.
Visit Site — Insight Prediction Full Insight Prediction review Compare with Probly

Who should choose which

Choose Kalshi if…

Full CFTC regulation
US dollar deposits/withdrawals
Excellent mobile app

Choose Polymarket if…

Deepest liquidity in the industry
Zero trading fees
Thousands of active markets

Choose Manifold Markets if…

Free to use
Anyone can create markets
Huge market variety

Frequently asked questions

Traders leave Probly for a few reasons: different regional availability (Global (excl. some jurisdictions)), fee structure (0% trading fees), or a preference for a different regulatory model (CFTC-registered (via QCX)). The alternatives below solve at least one of those.