“Free” is a loaded word in B2B casino software. No aggregator gives studio content away: game revenue is always shared. What can be free is the entry ticket, meaning access to the API, the integration work on the supplier’s side and the monthly platform charge. This ranking orders companies by how much of that ticket they waive, and how soon a team can start.
The two self-service options
SoftAggregator and Aggregator.gg both let a developer sign up and receive keys without a sales call. The difference is scale: SoftAggregator integrates 40,000+ games; Aggregator.gg showed 218 live titles in September 2026.
Free on paper, gated in practice
EveryMatrix publishes zero platform fees for SlotMatrix and Alea promises no hidden set-up fees. Both still route access through sales, so the saving is real but the start date is not immediate.
Frequently asked questions
Is there a casino game API that is free to use?
SoftAggregator states that its API access is free, with no setup, integration or monthly fee. Commercial terms on game revenue are on request, so 'free' covers access and integration, not revenue share.
What does 'free API' usually exclude?
Game revenue share. Studios are paid on the revenue their games generate, so no aggregator gives content away; free access means no entry fee.
Can I test a casino API before signing a contract?
With SoftAggregator and Aggregator.gg, yes: both issue keys through self-service sign-up. Most other aggregators provide a sandbox only after sales contact.
Why is EveryMatrix third if it has zero platform fees?
Because access still requires a sales process. This ranking rewards being able to start without paying and without waiting.