IT managers may be able to reduce internet costs through using a virtual network claimed by its operator to be the world's largest.
GRIC Communications, so far unknown in the UK, has agreements with internet service providers (ISPs) around the world.
Its GRIC Mobile Office handles dial-up connection complexity and reduces costs by providing local internet access.
"GRIC manages to give heterogeneity from homogeneous networks," Hong Chen, the company's founder and chief executive, told vnunet.com.
"Economic conditions long ago meant even the largest companies realised they couldn't afford their own network to cover the whole world. So they had to interoperate," he said.
Analyst organisation IDC has estimated that the number of mobile workers will reach 162 million by 2006, generating $73bn (£46bn) revenue for mobile office communications.
GRIC Mobile Office provides a consistent front end to disparate ISP networks. The user simply selects the country and network from a displayed list, and the software takes care of connectivity.
The firm currently has more than 20,000 access points in 150 countries and users receive live directory updates backed by real-time 24x7 local support.
Physical connection types include ISDN, xDSL and Ethernet, along with mobile 802.11b and GPRS - although GPRS agreements are at an early stage.
Applications include personal firewall and intrusion detection, web conferencing and time and expense management. It supports a range of devices from laptops to PDAs and smartphones. Pricing starts at £31 per user.
GRIC's low profile is partly attributed to the nature of its deals with large networks such as AT&T, who typically use elements of GRIC Mobile Office in their own services.
UK partners include Cable & Wireless but not BT, although Hong said he was currently talking with the telco.
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