Built around one spike.

Where the idea came from

OnePulse started with an argument about what makes a card game feel alive. It isn't the chandelier or the carpet. It's the half-second before a card lands face up, when the room goes quiet and then snaps back. We wanted a site that was about that half-second and nothing else.

So the design took its cue from a live data console. The background is near-black, the numerals are crisp, and one red line runs across the screen. Most of the time the line sits almost flat. When a card turns it twitches, and when a hand pays out it jumps.

Why only one game

Plenty of social casinos compete on volume. We went the other way. Spikeline 21 is the whole product, and all of our effort goes into making it clear and fair. The deck is a real 52-card shuffle, the dealer follows one stated rule, and every coin you win, lose or push is shown on screen as it happens.

Blackjack suited that plan because the choices belong to the player. Nothing is decided off-screen. You can follow every card, check every total, and work out exactly why a round went the way it did.

What we are not

This isn't a gambling operator. OnePulse takes no deposits, sells no coins and pays out nothing. The balance on screen is a free counter that resets when you reload. We don't offer a cash-out, a prize draw or a trade-in, and we never will. Anyone who suggests otherwise isn't speaking for us.

The site is for adults aged 18 and over, and it isn't aimed at any one country. We'd rather you played a few rounds, enjoyed them and moved on with your day than stayed longer than you meant to.

Who runs it

OnePulse is run by a small independent team of developers and designers who care about good typography and honest game logic. You can reach us through the support page, and we read everything that comes in.