Document ONE was developed by Reliance Software Ltd, an Advanced IBM Business Partner based in Wellington, New Zealand, which had over 10 years' experience in developing and supporting Lotus Notes/Domino applications.
Kathy Speirs (formerly Tremain) was the sole shareholder of Reliance Software Ltd. For the last five years Kathy has been primarily responsibile for the ongoing development, support, marketing and distribution of Document ONE.
In July 2006 Kathy sold the majority of Reliance Software's Lotus Notes-based business operations and established a new company called Document ONE Ltd to focus solely on the further development and support of Document ONE.