The firm said the board has recruited an interim CFO who will begin full-time on October 8 to ensure an orderly transition. The search for a permanent CFO is underway.
Elias-Jones leaves after two years as CFO and four years as financial controller at Bango.
"I thank Rachel for her contribution to the growth of Bango as a leader in mobile commerce, and her contributions to the strong Bango financial systems and success of Bango customers,” said chief executive Ray Anderson.
“End User Spend is twenty times higher than when she joined Bango, with Bango operating on a stable cost base as growth continues. Rachel will be an asset to her new company and we wish her well in her career."