Help for Heroes has announced it will take over fundraising website Bmycharity.
The site's founders previously said they would have to close it down because of a lack of funds.
The site will be owned by Help for Heroes' profit-making subsidiary - Help for Heroes Trading Company - and will be rebranded shortly as Bmyhero.
Brian Parry, chief executive of Help for Heroes, said the site will remain commission-free for charities and that organisations should continue using it as normal.