Do you lose everything when you die in Arc Raiders?
No — you only lose the loot from that run: your backpack contents and equipped gear drop where you fell. Whatever's in your Safe Pocket still reaches your stash, and your account, stash, and Workshop unlocks are untouched.
Dying costs you that run's loot, not your account — here's what's protected and what isn't.
No. Dying in a raid only costs you the loot you were carrying on that run: everything in your backpack and the weapons and gear you had equipped drop where you fell, free for another player or an ARC machine to pick over. Your account, stash, and Workshop stay exactly as they were before you dropped in — that's the whole reason Arc Raiders is built as an extraction shooter and not a permadeath one.
One slot always comes home. Every Raider gets a Safe Pocket, and whatever you tuck into it is sent straight to your stash even if you die — no extraction needed. Augments can add a second Safe Pocket slot, and a specific Epic looting augment is the only way to fit a weapon in one; without it, a Safe Pocket only takes smaller items.
A recipe you've already learned can't be taken away by dying. Once you've extracted a blueprint and used it to unlock an item permanently, that unlock lives on your account, not in your backpack, so it survives every raid after that. A blueprint you're still carrying when you die is loot like anything else, though, and it drops with the rest of your gear if you haven't gotten it out yet.
Getting killed also isn't the same as going down. A downed teammate can still be revived during a short window before the game calls it — a Defibrillator makes that revive fast, while bandages just slow the bleed-out so you have time to reach them. Once that window closes, the death is final.
Death ends the raid; only extraction keeps the rest
Die, and the raid is over immediately — there's no second chance at the same loot, just a trip back to the hub with whatever partial rewards you'd already banked. Extracting through an elevator, a metro station, an air shaft, or a keyed raider hatch is what lets you walk out with everything else you found. The one thing that does wipe your account on purpose is an Expedition: a voluntary reset, roughly every eight weeks, that trades your current levels, skills, stash, and Workshop blueprints for permanent bonuses on your next Raider — a choice you make, not something death forces on you.