JetX and Spaceman are the two crash games most often compared after Aviator, and on paper they look like close relatives: operator-configurable RTPs, sub-30-second rounds and a rising multiplier you cash out before it crashes. The differences, though, are real, and they start with the one thing most comparison articles get wrong: the fairness model.
The 30-second version
JetX (SmartSoft Gaming) offers a higher RTP ceiling of up to 98.9%, a 25,000x max multiplier and two independent bets per round. Spaceman (Pragmatic Play) counters with a unique 50% partial cashout, a polished interface and the distribution muscle of 2,000+ licensed operators across 80+ countries. Neither game gives you a working way to verify a single round: both are certified-RNG products, despite JetX still marketing itself as “provably fair.” The game that costs you less depends almost entirely on which RTP version your casino runs.
Both games sit in the first tier of crash gambling, a format built around one decision: cash out before the round ends. They share the same core loop, but the mechanics underneath split sharply once you look past the marketing.
📊 The stats head-to-head
JetX leads on ceiling numbers: a higher maximum RTP, a higher multiplier cap and two bets per round instead of one. Spaceman leads on distribution, regulated-market trust and the only mid-round partial cashout in the tier-one crash lineup.
🔍 Worth noting
JetX’s 25,000x multiplier ceiling is eye-catching, but the $10,000 per-bet monetary cap binds first at any stake above $0.40. Spaceman’s lower 5,000x ceiling is paired with a $500,000 cash cap, which only bites at the maximum $100 bet. For most players, Spaceman’s cap is irrelevant while JetX’s shapes every session.
⚡ How each round works
Both games follow the standard crash loop: bet, watch a multiplier rise, cash out or lose. The differences sit in the betting window, the number of bets and what happens mid-flight.
JetX round loop
Betting window opens (5 – 15 seconds)
Place one or two independent bets, $0.10 to $100 each. Optionally set auto-cashout targets for either or both (1.01x to 1,000x).
The jet launches
The multiplier climbs from 1.00x. Both bets ride the same multiplier curve but can be cashed out independently.
Cash out or crash
Hit “Collect” on either bet at any time from 1.01x upward, or let the auto-cashout fire. If the jet explodes before you collect, that bet is lost.
Round ends
The round also ends automatically if the multiplier reaches the ceiling or the per-bet monetary cap is reached.
Spaceman round loop
Countdown (5 seconds)
Place one bet, $1 to $100. Optionally toggle auto-cashout and/or 50% auto-cashout (1.01x to 4,999.99x).
The astronaut launches
The multiplier climbs from 1.00x. Two buttons appear: “Cashout” (exit fully) and “Cashout 50%” (bank half, leave half riding).
Cash out, split or crash
Use the full cashout at any time, or use the 50% cashout to bank half and let the rest ride for a higher multiplier. If the spaceman crashes before you collect, whatever remains is lost.
Round ends
At 5,000x all remaining bets auto-pay. The game continues, and a new countdown begins.
🎯 Dual bet vs half cashout
This is the mechanical split that defines the two games. JetX gives you two entry decisions before the round starts. Spaceman gives you one entry and a two-stage exit during the round. Both tools manage variance, neither changes expected value.
💡 Key insight
JetX’s dual bet is a two-position hedge: you commit both stakes before the round starts. Spaceman’s half cashout is a mid-flight escape hatch: you react to how the round is unfolding. Same expected value, different psychology. JetX rewards a plan, Spaceman rewards a read.
“JetX gives you two bets and two entry decisions. Spaceman gives you one bet and a two-stage exit. Both change how risk feels without changing what risk costs.”
🛡️ Fairness: what you can actually verify
Neither JetX nor Spaceman gives you a working way to independently verify a single round result as of mid-2026. Both are certified-RNG products. The difference is honesty of labelling.
JetX is still marketed as “provably fair” by SmartSoft and across most affiliate sites. No confirmed player-usable verification workflow exists: there is no in-game mechanism that shows a server-seed hash before the round and reveals the inputs afterward for independent recomputation. SmartSoft’s aggregator partner Slotegrator reports that the company uses ID Quantique’s hardware quantum random number generator certified by iTech Labs, an architecture inconsistent with a deterministic commit-reveal seed model. The “provably fair” label, as it stands, is marketing, not verifiable functionality.
Spaceman launched in March 2022 marketed as having provably fair mechanics. The official Spaceman Game Help changelog records the removal in version 1.7, dated 10 July 2024: “Statistics section update (description of Provably Fair game mechanics removed).” The game is now positioned purely as certified RNG, audited by GLI and BMM Testlabs. Multiple affiliate sites still incorrectly call Spaceman provably fair. They are out of date.
⚠️ Important
If per-round verification matters to you, neither of these games provides it. Aviator (Spribe) remains the only tier-one crash game with a documented, player-usable provably fair workflow. For a full breakdown of what “provably fair” actually means and which games deliver on the claim, see our provably fair crash games guide.
Both games are, however, lab-certified. JetX carries iTech Labs, eCOGRA and Gaming Associates (GA Europe) certification. Spaceman carries GLI and BMM Testlabs certification via Pragmatic Play. Lab certification tests the RNG and confirms the published RTP over a large sample, but it does not let you check any individual round.
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🔢 What they cost to play
Round pace is a wash: both games run roughly 120 to 200+ rounds per hour depending on flight length and betting-window duration. The dominant cost driver is the RTP version your casino deploys, and the gap between the best and worst configurations across both games is nearly 4 percentage points.
The general crash maths are straightforward: your expected value at every cashout target is minus the house edge times your stake. What changes between these games is how large that edge is.
The bottom line: at equal RTP versions (~97% each), the two games cost roughly the same per hour. The real gap opens when operators ship different tiers: a 98.9% JetX build costs less than a quarter of what a 95% Spaceman build costs over the same session. Check the in-game info panel before you play.
“The number on the screen when the jet or the astronaut launches is the same. The number in the info panel when you open settings is not, and that is the only number that matters.”
🏢 Who makes each game
SmartSoft Gaming is a Georgian studio founded in Tbilisi in 2015 by developer Daniel Ratiani. It holds an MGA B2B licence (MGA/B2B/925/2021), plus approvals in Romania, Greece, Ontario, Italy, Peru and Georgia. JetX launched in 2018 as the company’s flagship, distributed through aggregators including SOFTSWISS, SoftGamings and Slotegrator. SmartSoft entered 25 new markets in 2024 and lists operator partners including bet365, Betsson, Betway, Entain and Flutter. For the full SmartSoft profile and JetX deep dive, see our JetX guide.
Pragmatic Play is a Gibraltar-headquartered studio led by CEO Julian Jarvis, holding licences in over 40 jurisdictions including the UKGC, MGA and Gibraltar. Spaceman launched on 24 March 2022 as Pragmatic’s first crash game, distributed through the company’s single-API platform to over 2,000 registered licensed operators across 80+ countries. That distribution reach, covering 33 languages with tier-one partnerships including LeoVegas, Bet365 and Ladbrokes, is the single biggest structural advantage either game holds. For the full Spaceman profile, see our Spaceman guide.
📈 Availability and distribution
Spaceman has a decisive distribution advantage. Pragmatic Play’s pre-integrated network covers the UK, Malta, Gibraltar, Ontario, Sweden and dozens of other regulated markets, with content live across 80+ countries. JetX’s reach is real and growing fast, particularly in Europe (Italy, Romania, Greece, Portugal), Latin America (Brazil compliance secured in 2025) and Africa (Supabets, LottoStar, WSB partnerships), but it skews toward emerging markets and crypto operators.
In the UK specifically, neither game has a strong mainstream presence on UKGC-licensed sites. Spaceman is the more likely of the two to appear at a UKGC operator given Pragmatic Play’s UK licence, but crash games in general remain a thin category on UK-regulated platforms.
The rapid growth of crash games across emerging markets has drawn increasing regulatory scrutiny over speed, re-bet pace and player harm. We cover the research evidence and what regulators are doing in our dedicated guide: crash gambling and player harm.
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🏆 Which should you play
The right answer depends on what you prioritise. Neither game is objectively better. They solve different problems for different players.
❓ Frequently asked questions
Is JetX or Spaceman better?
Neither is objectively better. JetX offers a higher RTP ceiling (up to 98.9% vs 96.5%), a higher max multiplier (25,000x vs 5,000x) and two bets per round. Spaceman offers a unique 50% partial cashout, a more polished interface and wider availability at regulated casinos through Pragmatic Play’s network. The right choice depends on whether you prioritise value or accessibility.
Is JetX provably fair?
JetX is marketed as provably fair, but no confirmed player-usable verification workflow exists. There is no in-game mechanism to view a pre-round hash and recompute the result afterward. SmartSoft reportedly uses a hardware quantum RNG certified by iTech Labs. Treat JetX as a certified-RNG game, not a verifiably fair one.
Is Spaceman still provably fair?
No. Spaceman launched in March 2022 with provably fair mechanics, but Pragmatic Play removed the feature on 10 July 2024 (Game Help version 1.7). It is now a certified-RNG game audited by GLI and BMM Testlabs. Many affiliate sites still call it provably fair. They are out of date.
What is the RTP of JetX and Spaceman?
Both are operator-configurable. JetX ranges from 96.2% to 98.9%. Spaceman ranges from 95.0% to 96.5%. The figure that applies to your session is whatever the in-game info panel shows at your casino, not the headline number in marketing materials.
What is the maximum win on JetX vs Spaceman?
JetX has a 25,000x multiplier ceiling but a hard $10,000 per-bet monetary cap, whichever hits first. At any stake above $0.40, the monetary cap binds before the multiplier ceiling. Spaceman has a 5,000x ceiling with a $500,000 monetary cap, which only constrains at the maximum $100 bet.
How does the Spaceman 50% cashout work?
Mid-round, pressing “Cashout 50%” banks half your current winnings at the live multiplier while the other half keeps riding. You can then cash out the remainder later or lose it if the spaceman crashes. It can also be pre-set via “50% Auto Cashout.” It changes how the session feels, not what it costs: expected value stays the same.
Which game is cheaper to play per hour?
At equal RTP versions, the two are roughly the same: both run 120 to 200+ rounds per hour. The cost gap depends on the RTP tier your casino deploys. A 98.9% JetX build costs about $1.65 per hour at $1 stakes and 150 rounds. A 95% Spaceman build costs $7.50 under the same conditions. Always check the info panel.