Usage is free and can be anonymous if desired. Ultralight and hang glider pilots have long used emergency parachutes which are attached to the aircraft instead of the pilot. You don't have to bail out. Instead the pilot and the aircraft float down together. Manufacturers have claimed a deployment in only 2 seconds which allows for a possible successful deployment as low as 100 ft.
Some designs pack the chute very tightly inside a canister.
The earliest versions used an explosive charge to fire a projectile which then pulled out the chute. A new design uses compressed air or gas. There are several pilot organizations which can help. They administer an ultralight instructor program and voluntary pilot and vehicle registrations. The magazine is the oldest and largest ultralight publication.