What you actually need to run it
One device that everyone can see. A television, a monitor, or a shared screen on a call. The host runs the pack on it.
A phone each for everyone else. Any phone with a browser. No app store, no download, no account.
An internet connection for the host. The phones connect to the game through it. This is the only real technical requirement and it is a modest one - our bad internet guide lists Jackbox among the most connection-tolerant things you can run for a group.
That is the entire list, and it is why this is the first suggestion when somebody says their friends do not have consoles. Compare it with any other multiplayer game, where every participant needs the right platform, the right copy and the right account.
How it compares to the alternatives
Among Us is the closest thing in spirit - free on phones, full crossplay, four to fifteen players, and built around a group discussion. It asks everyone to install something and to be on a voice call, which is more setup than Jackbox, but it costs nothing and it gets deeper the more you play it. Full review.
Fall Guys is free and needs no explanation at all, though every player does need to install it on a platform they own. Human: Fall Flat is the cheap crossplay option that takes eight and produces the same kind of laughter from physics rather than from what people wrote.
The distinction that matters: Jackbox is the only one of the four where most of your group can participate fully while owning nothing at all.
Who it is really for
A house party where people are drifting in and out. A family gathering with three generations in the room. A work social where you cannot assume anyone owns a console - our coworkers page is built around that. And the recurring long-distance group where one person has a good screen-share connection and nobody else wants a new install.
It is not for a pair, it is not for a group that wants to improve at something, and it is not for an evening where people want to be absorbed rather than performing.
Verdict
Jackbox is the lowest-friction group game there is, and the friction is the point - the reason most game nights fail is not the game, it is that half the group cannot join it. One purchase, a room code, and eight people are playing in ninety seconds.
Buy the pack that is cheapest on the day unless you specifically want the newest one, and read our game night guide for how to slot it into an evening alongside something else.