ʻO ka InvoicePlane kahi palapala noi manuahi a wehe ʻia. ʻO ka papahana ka mea pani a me ka mea nona ka codebase o FusionInvoice version 1.x, i kākau ʻia e Jesse Terry. ʻO FusionInvoice kahi lako polokalamu open source ma mua akā ua hoʻololi ʻia i huahana kālepa me ka hoʻokuʻu ʻana o ka mana 2.x. Ua lawe ʻo Kovah, ke alakaʻi o ka papahana InvoicePlane, i ka codebase a hoʻomaka hou i ka papahana me kahi inoa hou: InvoicePlane.