We are the mobile core software specialist for MVNOs

Leissner, established in 1969,  is a renowned IT development company in Sweden. We are developing communication solutions for telecom operators and have contributed to standards and innovations in telecommunications.

Our vision is to contribute in breaking up the dominance of large telecom operators by delivering cost-efficient software and establish interoperability for new, fast growing independent operators. Leissner’s strength is the flexible and customer oriented development of new and existing functionality for operators in the telecommunications industry.

Leissner has over the years maintained a good track record of delivering stable and secure software for telecom operators. The Leissner product family includes traditional telecom systems and a MVNE/MVNO core platform. All systems are developed by Leissner employees in Sweden.

MVNE/MVNO Mobile Core

MVNE/MVNO Mobile Core is a suite of mobile core components, providing a flexible mobile setup with unique functionality that can be customized to fit any operator that is providing mobile services as MVNE or MVNO.


MVNO SaaS is a cloud service including a complete suite of services to be used by any corporation that need a fully managed MVNO service.

IMS Cloud

IMS Cloud is a suite of services for VoLTE and VoWiFi.


GMSC is a standardized voice softswitch that MVNOs need to route voice calls outside the mobile network.


GTP-Proxy is a mobile core network node used to proxy GTP traffic from GRX network to several PGWs.


HSS/HLR is a central subscriber database that contains details of each subscriber that is authorized to use the mobile core network.


OCS is for securing real-time charging payments.


PGW/GGSN is a standardized packet core component that operators and MVNOs need between the GSM, UMTS, LTE and 5G NR network and the Internet.

Milestones in Leissner company group


Netwo launch mobile services in France using Leissner MVNE/MVNO Mobile core installed locally in France in the customers data centers.


Cellhire launch mobile services in France using Leissner MVNO SaaS.


Leissner becomes MVNE partner with Hi3G Denmark.


Celebrates 50 years in the IT industry.


More than 10 MVNOs installed on Leissner core software.


First mobile core installation outside Sweden.


The mobile platform offers complete MVNE functionality.


Leissner's first full MVNO setup together with Hi3G Access in Sweden.


Interconnection agreements for SMS in Sweden and started development of systems for SMS.


Leissner Telecom Billing system was introduced to the Swedish market.


Started development of systems for telephony.

The company group became a telecom operator and signed fixed telephone interconnection agreements with Telia.


Strategical decision to be a telco system supplier.


Gotanet was one of the first actors in Sweden to offer ADSL access services using Telia telecommunications stations.


Götalandsnätet AB was founded with the brand Gotanet acting as Internet Service Provider (ISP).


Obtained the first mainframe, SAAB D22.


Leissner Data AB was founded.