For a long time both the social and political climate towards modern accounting is very favourable, but this change is especially disruptive among the SMEs.
Currently, there are no special legal licenses required to provide online accounting services. The only limitation is that accountants must be members of a professional association that endorses their formation before the Spanish Tax Agency. Being a member of an association will allow the accountant to obtain the certificate to operate on behalf of third parties.
The accounting market is one of the most developed Fintech markets in Spain, especially within the large companies.
A FinTech to consider is Iasesoria.