Each credit card provider has its own criteria to determine who it will and won't accept, typically looking at factors such as your income, your credit history (how well you've managed credit in the past, such as loans or mobile phone contracts) and whether you're looking to use the card to withdraw cash.
Therefore there's no set 'easiest cards to get' as it varies from person to person. However, the cards in this guide are designed for poorer credit scorers, so will often accept those with CCJs, defaults or past bankruptcies where other cards wouldn't.
We've full help on how to find your top credit card to rebuild credit above, including our credit card eligibility calculator which shows you your changes of acceptance for many cards before applying.