Best way to counter boarding partys?

[Shawdotion]

Should you specialize in fast movement? Specialize in long range weapons to make sure enemy boarding ship doesn't get close enough to your ship?

[Dancer164]

Depends, if you have a large ship then have enough on-board soldiers to defend, medium size you can get away with having soldiers on board, or you can try to out run it, small ships you can just ram into the boarding ship and take both ships down.

[诸葛孔明Alter]

If you are building a heavy-armored battleship focus on shelling battle, then put enough barrack inside it since your speed won't be high enough to flee from boarding (without mods), but it might not work very well due to the size of your ship; If you prepare to give up some defence then build a battlecruiser with lighter armor and much higher speed & ceiling, it shall easily handle boarding ship.

[Doctor Psyringe]

The bestest way? No cockpit. Only works on team battles, though.

I was playing Lur, short for a longer name; and he's all Capture. He likes playing tier too, so unless you beat him at 200 he wont care for the 500, etc.

Well, I dominated Lur. And I did it using no cockpits. While 1 vehicle would have a cockpit and nav'able, another would have no cockpit and act the "Honeypot". He goes in to capture - loses his troops - and I finish the job with the last remaining worth-while vehicle.

You're going to face a lot of Arachnids, because that's what the boys online swing for budget. So - trick them into places they can't be commanded out of. Works-a-charm, never fails, and it's always satisfying when they realize their mistake. Large portion of my forces have no cockpit.

[CelestialAllure]

Mobility, particularly superior flight ceiling can defend you from boarders with 100% reliability.

If you cannot gain superior flight ceiling, mobility and dodging can buy you time or cause boarding parties to be broken up or even fall and die.
Note that in boarding combat, troop saturation is a huge deal, so you need enough guards/marines to properly defend your ship, and breaking up enemy boarding parties can give you the advantage.

Psyringe's tactic is effective, but I consider it very cheesy, and I believe Zark has said he will change boarder controls so that these "honeypot traps" will not trap troops as they do currently.