Which platform is best for California beginners?

Polymarket is our #1 pick for California traders: CFTC-regulated, the deepest live book, and a $50 trading bonus with code CAPREDICTS (US iPhone app). OG by Crypto.com is #2 with the largest welcome bonus (up to $100, code CAPREDICTS) and broad device support. Kalshi is #3, best for politics and the broadest CFTC market mix.

Which platform has the lowest fees?

Kalshi charges no commission on most markets and earns from the bid-ask spread. Polymarket charges a small spread plus gas. Sportsbook-style platforms (PrizePicks, Underdog) build margin into the lines.

Can Californians use Polymarket?

Yes, through Polymarket's US-legal perpetual-futures product launched in 2026. Direct prediction-market trading on the Polygon order book remains restricted for US users.

Which platform is best for sports?

Kalshi for game outcomes and prop-style binary markets; Sleeper, PrizePicks, and Underdog for parlay-style player props.

Index·Los Angeles·9 platforms reviewed

Platforms

Every legal prediction market in California, ranked.

Californians have no legal online sportsbook. Prediction markets are the federally-regulated alternative. We've used every platform we cover. Rankings reflect regulatory standing, liquidity, product quality, and fit for California residents. Updated monthly.

Five CFTC-regulated event-contract platforms accept California residents in 2026: Kalshi, Polymarket (US perpetuals), Sleeper Picks, PrizePicks, and Underdog Fantasy. All are legal statewide.

At a glance

Top 3 CFTC-regulated platforms for California

Platform	Best for	Fees	Funding	Bonus
OG (by Crypto.com)	Biggest welcome bonus	Low taker / maker	Crypto.com balance, card	Up to $100 (CAPREDICTS)	Open
Kalshi	First-timers, bank funding, 1099-B	≈ $0.01 / contract	ACH, debit card	$10-$25 new trader	Open
Polymarket	Deepest global liquidity, iPhone app	≈ 0-2% by market	USDC (crypto on-ramp)	Deposit $10, get $50

OG (by Crypto.com)

CA legal

Biggest welcome bonus

Fees: Low taker / maker
Funding: Crypto.com balance, card
Bonus: Up to $100 (CAPREDICTS)

Kalshi

CA legal

First-timers, bank funding, 1099-B

Fees: ≈ $0.01 / contract
Funding: ACH, debit card
Bonus: $10-$25 new trader

Polymarket

CA legal

Deepest global liquidity, iPhone app

Fees: ≈ 0-2% by market
Funding: USDC (crypto on-ramp)
Bonus: Deposit $10, get $50

All platforms

9 listings

Polymarket

The world's largest prediction market, now live on iPhone in the US.

4.8

PoliticsCultureSportsNews

Deposit $10 Get a $50 Trading Bonus!CodeCAPREDICTS

Read Polymarket review

ProphetX

Your sports prediction market. Same moments, bigger payouts. Now available nationwide.

4.7

SportsPeer-to-peerNFLNBA

Trade $10 Get $20!CodeCAPREDICTS

Read ProphetX reviewSign up at ProphetX

Kalshi

The regulatory leader.

4.6

PoliticsSportsEconomicsCulture

Trade $25 and Get $25!CodeCAPREDICTS

Read Kalshi reviewSign up at Kalshi

OG (by Crypto.com)

CFTC-regulated event contracts. Get up to $100 in bonuses.

4.7

CryptoSportsMacro

Get up to $100 in bonusesCodeCAPREDICTS

Read OG (by Crypto.com) reviewSign up at OG (by Crypto.com)

Rebet

Social-first peer-to-peer sports prediction. Travel-only: not available to California residents.

4.3

SocialSportsMobile-firstTravel-only

Read Rebet reviewSign up at Rebet

Novig

Set your own odds. Peer-to-peer sports prediction, travel-only, not available to California residents.

4.4

SportsSharpPeer-to-peerTravel-only

Spend $5 Get $50 in Novig CoinsCodeCAPREDICTS

Read Novig reviewSign up at Novig

Launching Soon

Sleeper

Sports-first. Social-native. Built for the group chat.

4.5

SportsSocialNFLNBA

Read Sleeper reviewGet notified when Sleeper launches

Launching Soon

Chalkboard

Player props, simplified.

4.2

SportsPlayer PropsNBANFL

Read Chalkboard reviewGet notified when Chalkboard launches

Launching Soon

Robinhood Event Contracts

CFTC-regulated event contracts inside the Robinhood app, powered by Kalshi.

4.0

SportsPoliticsMacroBrokerage

Read Robinhood Event Contracts reviewGet notified when Robinhood Event Contracts launches

Choosing a prediction market platform

Which platform is best for California beginners?: Polymarket is our #1 pick for California traders: CFTC-regulated, the deepest live book, and a $50 trading bonus with code CAPREDICTS (US iPhone app). OG by Crypto.com is #2 with the largest welcome bonus (up to $100, code CAPREDICTS) and broad device support. Kalshi is #3, best for politics and the broadest CFTC market mix.
Which platform has the lowest fees?: Kalshi charges no commission on most markets and earns from the bid-ask spread. Polymarket charges a small spread plus gas. Sportsbook-style platforms (PrizePicks, Underdog) build margin into the lines.
Can Californians use Polymarket?: Yes, through Polymarket's US-legal perpetual-futures product launched in 2026. Direct prediction-market trading on the Polygon order book remains restricted for US users.
Which platform is best for sports?: Kalshi for game outcomes and prop-style binary markets; Sleeper, PrizePicks, and Underdog for parlay-style player props.