The IFISAs we list vary greatly some are based upon property loans, others loans to small businesses and SMEs; still more combine the two.
They also vary in terms the minimum investment they will accept, and the period of your investment - typically the longer the term, the greater the reward.
As with any investment it is important that you fully understand what you are investing in, what your exposure to risk is, and what costs you will incur.
Whilst some marketplace lenders operate a lifeboat fund to cover the cost of default, not all do; your investment will be diversified over a wide range of loans, but P2P lending is a relatively new phenomenon and it is not covered by the Financial Services Compensation Scheme.