The pulldown is how most people train the lats. Here is what replaces it, from bodyweight to bands, and what each one leaves out.
If you only pick one
If you can do pull-ups, do pull-ups: it is the same pattern with nothing supporting you. If you cannot yet, the band pulldown is the closest match at home and the inverted row is the closest in a rack, and both let you start lighter than your bodyweight. The straight-arm pullover is the one to add, not the one to pick.
What it trains
Mainly: The latissimus dorsi: the broad muscle of the back that pulls the upper arm down and towards the body.
Along with it: The biceps and the forearms, the teres major, and the lower trapezius and rhomboids that move the shoulder blades.
The machine lets you pull with less than your bodyweight, and lets you add load in small steps. That is why it is the default for this pattern rather than a pull-up.
Why people look for an alternative
The cable station is busy, or your gym has none.
You train at home with a bar or bands.
You cannot yet pull your own bodyweight, or you can pull far more than it.
You want the same pattern with your shoulder in a different position.
The alternatives
Pull-up
Covers
The same pattern, unsupported: lats, biceps and the whole shoulder girdle.
Leaves out
You cannot go lighter than your bodyweight without help, so it is not a beginner swap.
Kit
A bar; a band or an assist machine if you need one.
Chin-up
Covers
Same pull with the palms towards you, which brings the biceps in further.
Leaves out
Same problem with load, and less lat-dominant than a wide grip.
Kit
A pull-up bar; a band if you need help.
Band pulldown
Covers
The exact movement at home, with resistance that you can pick.
Leaves out
Bands get harder as you stretch them, so the load is uneven through the range.
Kit
A band and an anchor above your head.
Inverted row
Covers
Pulls the upper back and arms at an angle you can set by moving your feet.
Leaves out
A horizontal pull, so the lats work in a different direction than in a pulldown.
Kit
A bar in a rack, or rings.
Single-arm row
Covers
Lats and mid-back per side, with your trunk supported.
Leaves out
Horizontal rather than overhead, and the range at the shoulder is shorter.
Kit
One dumbbell and a bench.
Straight-arm pullover
Covers
Isolates the lats with the elbows locked, without the biceps taking over.
Leaves out
No real biceps or grip work, and it loads a narrow part of the range.
Kit
A cable and a straight bar, or one dumbbell.
What this page does not do
Everything above is about which muscles pull and from which angle. That is all this page claims to know. It does not say how wide to grip, how far to lean back, or how to keep a shoulder happy in an overhead pull. Those are coaching questions, and a page that answers them without seeing you is guessing. If something hurts on the way up, that is a conversation with a physiotherapist before it is a conversation with a list of alternatives.
In the app every exercise has a swap button that works the same way: it says which muscles the alternative covers, which it leaves out, and what kit it takes. Filter by what you have and the list is only what you can do.
