Krantz has been CRO at the firm for the last two years. He will act as second-in-command to CEO Bertrand Schmitt, focusing on the company's customer-centric efforts.
Jain joins from CouchBase, where he was SVP and CFO. He has previously held roles at Model N and NetSuite and CFO and VP of Finance respectively.
"I am excited to have Ted and Sujan partner with me and our executive team to usher in the next phase of growth for App Annie," said App Annie CEO Bertrand Schmitt.
"Their expertise is crucial as we scale our business and deepen our investment in a comprehensive solution — from our product suite and customer success to operations and professional services."
It is not the only shake-up to App Annie's senior management in the last 12 months. Aaron Mahimainathan joined as Chief Product Officer back in November 2016.