I have a bitcoin wallet in blockchain.info.

Is there a way to recover/find bitcoins when blockchain.info is abruptly shut-down by hacking or unexpected events? I have a paper backup of blockchain.info's wallet.

The same question for Trezor. If Trezor is bankrupted and its software is no more available, would I be able to find bitcoins stored with Trezor?

Thanks in advance for you kind comments.