The funding will support a three-year programme led by Cast, which helps organisations to use technology for social change, to help charities develop new digital services and products and to increase knowledge of digital technology in the sector.
Cast will use the funding for two initiatives. The first, which Cast calls an intensive "accelerator" programme, will involve Cast working with 12 charities for three months each to build new digital services.
The organisation said it was specifically looking for charities that have a tested non-digital model of intervention but which are interested in digital transformation, and also federated organisations with national scale but also autonomous local branches.
The second initiative involves developing a set of learning tools, templates and publications, both on and offline, to offer sector-wide support and share ideas on how charities can use digital technology more effectively.
A Cast spokeswoman said this would be open to the whole voluntary sector.
Cast will invite applications for its accelerator programme later this year, with the aim of having the first two charities starting the programme next year.
Dan Sutch, co-founder and director of Cast, said the two programmes would help charities to "thrive in the digital age".