Call worldwide at the lowest rates

Why bespoke VoIP mattered

Talk360 began on an off-the-shelf VoIP stack that could not flex with the roadmap—changes were expensive and slow, so RBN asked Sping in 2013 to replace it with custom clients.

RBN wanted engineering handled end-to-end while they focused on strategy, marketing, and sales, including campaigns such as affiliates, vouchers, and friend bonuses. Sping still partners tightly to keep unlocking business value.

Early-stage products need to iterate fast: bespoke software lets you test, tweak, or pivot promotions like bundles and free minutes quickly.

“Custom software created freedom to design the right marketing mechanics for our audience.”

Hans Osnabrugge — CEO Talk360

Version management is a multidimensional puzzle

Deep OS integration means callers keep native address books, favourites, and notification badges—parity with the stock dialer—but we inherit every platform release schedule from Apple and Google.

A single OS upgrade can break calling flows or install paths; new hardware can upset layouts overnight.

International usage spans brand-new flagships and legacy devices in emerging markets, so compatibility matrices stay wide.

Third-party SDKs add their own minimum versions, so every dependency upgrade is weighed carefully before roll-out.