Marketplace vs direct lender: the core difference
The simplest way to understand Capvant and Fundbox is that they sit on opposite sides of the same market. Fundbox is a direct online provider: it funds from its own book and makes its own decision. Capvant is a funding marketplace: it doesn't lend, it compares offers from a panel of funders so you can choose.
Neither model is better in the abstract, they suit different moments. A direct provider can be quick and self-serve when you already know the product you want. A marketplace is useful when you'd rather see several options side by side before you commit.
Whichever route you take, always check the provider's own site for current terms, because rates and criteria change and we don't quote figures we can't keep current.