SpaceX Starship Flight Test 13

Platform comparison

Market context

SpaceX aborted the thirteenth Starship flight test at T‑0 on 16 July 2026, just before liftoff, when some engines failed to start [2][4]. The thirteenth test uses Booster 20 and Ship 40, the second flight of Block 3 hardware, and aims to deploy 20 V3 Starlink satellites that will extend solar arrays and attempt laser links to ground stations [2][6].

Historically, early Starship tests have seen last‑second aborts followed by rapid re‑attempts once the cause is isolated, with Flight 9 and Flight 11 both recovering within days after similar T‑0 holds [2]. A 0% YES probability on Polymarket implies the market treats a successful launch as effectively impossible before a new attempt is confirmed, whereas decimal‑odds books like Betfair or Smarkets would price the same event as a long‑odds outlier rather than a zero. Kalshi’s implied‑probability format and KYC requirements also diverge from Polymarket’s fee structure and lighter verification, affecting how traders express conviction on a market that may reset once SpaceX announces a new window.

Traders should watch for an official SpaceX statement on the abort cause and a revised launch window, as the primary target was 15 July with a backup on 16 July, and a conservative rollback could push liftoff to the week of 20 July [2][5]. The next catalyst is the FAA‑cleared launch clearance confirmation and any static‑fire re‑test of Booster 20, which previously cleared a full 33‑engine static fire on 10 July [5][8]. Until SpaceX confirms a new attempt, the market’s zero probability reflects the absence of a live launch window rather than a permanent failure.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We read SpaceX Starship Flight Test 13 from four platform perspectives: Polymarket (on-chain CLOB), Kalshi (CFTC-regulated exchange), Betfair Exchange (sports book exchange), Smarkets (peer-to-peer betting exchange). Polymarket's live mid is the canonical probability; the side-by-side columns benchmark fees, KYC, settlement currency and deposit rails so you can choose the venue that fits your jurisdiction and trade size.

Resolution & payout

Settlement is the biggest difference between the four platforms: Polymarket on-chain in USDC (instant), Kalshi USD via CFTC (T+1), Betfair and Smarkets in local currency via bank withdrawal (T+1 to T+3). On-chain settlement clears in minutes — the fastest payout path of the four.

FAQ

Polymarket vs Kalshi — which is better?

Depends on your location. Kalshi is CFTC-regulated, US-only with full KYC. Polymarket is global, on-chain, no KYC up to $1,500. Polymarket has ~10x higher liquidity but higher regulatory risk.

Which platform has the deepest liquidity?

Polymarket — by a wide margin. Top markets reach $50-500M volume, Kalshi ~$200M cumulative, Betfair similar. Deeper liquidity means your trade moves the quote less.

Is Betfair a Polymarket alternative?

Only partially. Betfair Exchange is UK-focused with a sports-betting emphasis; they have politics markets but with thinner liquidity than Polymarket. Settlement in GBP/EUR, 2-5% commission on winnings.

What about Smarkets as an alternative?

Smarkets is a UK betting exchange with a lower default commission (2%) than Betfair. Liquidity on political markets is below Polymarket, comparable to Kalshi. Geo-blocked in many jurisdictions.

Which platform supports Klarna/SOFORT?

Directly: none. Polymarket accepts only USDC on Polygon. Kalshi Alternative offers a fiat on-ramp via Klarna or SOFORT (DE/AT/CH) and converts internally to USDC for the Polymarket order book. T+1 processing.