The organisation, which is the lead partner in the ChangeUp infrastructure programme's collaboration national support service, plans to set up 60 'clusters' of collaboration across England.
Although the majority will be partnerships of voluntary sector organisations, Bassac hopes to encourage public bodies such as local authorities to take part in some of the clusters.
The measure is designed to save money and encourage the sharing of good practice and expertise. Some clusters could also be involved in collective bidding for public service delivery contracts.
Nigel Newton Sawyerr, collaboration manager at Bassac, said: "The clusters will mainly be made up of voluntary and community sector organisations, but we are looking to start creative clusters and hope the public sector will be part of that."
He added that private sector organisations could also be involved.