NEW YORK — It was Sept. 14, 2013, when a mysterious email bearing the subject line “Is this your first cello?” landed in Christine Walevska’s inbox. The renowned cello virtuoso, however, checked her ...
Cello, a Munich-based startup incentivizing software-as-a-service referrals, has raised $3.5 million. German investor HV Capital pre-empted the round after Cello raised a pre-seed in September. We got ...
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