Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
PolyGram Pick polygram.ink |
40% | 60% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Open on PolyGram → |
Polymarket polymarket.com |
40% | 60% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | Open on PolyGram → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | Open on PolyGram → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | Open on PolyGram → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | Open on PolyGram → |
Live odds for Polymarket-based markets come from the Polygon order book. Non-Polymarket venues show attributes only; clicking any row opens the market on PolyGram.
Active sub-markets
Market context
The Giants and Diamondbacks meet again in Phoenix on Wednesday, with the market implying Arizona are the more likely winner at about 65% to 35%. That sits below the kind of price you would often see for a home side with the better recent result, but it reflects a game where the matchup can swing quickly on starting pitching and bullpen usage. Arizona opened the series with a 12-2 win on Monday, a reminder that the head-to-head can be lopsided in either direction even when overall team records and season-long run profiles are close.
For comparison, the main platforms frame the same event differently: Polymarket uses straight yes/no probability, while Betfair and Smarkets usually show decimal prices that need converting back to an implied chance, and their net cost also depends on commission. KYC access is also not uniform, which can affect who can actually price or hedge the game. MLB’s preview page notes Justin Verlander has a 0.69 ERA across two starts this month, while Brandon Pfaadt is 0-4 with a 5.11 ERA in five career starts against San Francisco, so any late confirmation on starters matters. The game is scheduled for 7:40 pm UTC, and postponed matches stay open until completed, while a cancellation or tie would settle 50-50.
Methodology
This page compares San Francisco Giants vs. Arizona Diamondbacks specifically across Polymarket, Kalshi, Betfair Exchange and Smarkets. Live odds come from the Polymarket order book; the other venues' contract details are maintained manually because their APIs aren't directly comparable. Every CTA routes to PolyGram, which mirrors the Polymarket order book at 0% fees.
Resolution & payout
Polymarket settles via UMA Optimistic Oracle on Polygon. A proposer posts the outcome with a bond, the two-hour window runs, then the smart contract pays USDC.
Kalshi settles USD through the CFTC-regulated clearinghouse — the cleanest variant, with heavier KYC. Betfair Exchange settles in account currency (GBP/EUR), net of 2-5% commission. Smarkets follows the same model as Betfair with a lower default 2% commission.
FAQ
- How does resolution work?
- Through the UMA Optimistic Oracle on Polygon: a proposer submits the outcome, a two-hour challenge window opens, and USDC payouts settle automatically once the result is final.
- What does it cost to trade on PolyGram?
- Zero. PolyGram routes every order to the live Polymarket order book; the only cost is the Polygon network fee, typically under $0.01 per transaction.
- How fast are USDC deposits?
- Polygon credits deposits after 12 confirmations — usually under 30 seconds. Withdrawals follow the same path and land back in your wallet within minutes.
- Do I need to KYC for this market?
- Not under $1,500 of lifetime trading volume. Above that threshold, PolyGram triggers a quick verification flow that finishes in minutes.
- How reliable are the quoted odds?
- The YES/NO percentages are the live mid-prices of the Polymarket order book. On deep markets they move every few seconds; on thinner ones you'll see short plateaus.
Trade San Francisco Giants vs. Arizona Diamondbacks on PolyGram
Live order book, 0% fees, USDC settlement in seconds.
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