The secure messaging platform, which counts Google and a range of banks as backers, is in talks with new investors to raise a nine-figure sum.

Symphony Communication Services, the secure online messaging platform backed by a host of corporate investors, is in talks to raise “at least” $100m from new investors, The Information reported yesterday.

Symphony has built a cloud-based platform that enables users to communicate securely with each other, and developed it in order to serve financial traders who need to send or receive information quickly without it being intercepted.

Users pay upwards of $20 a month to use the service, and Symphony has…