Seamless OS

Seamless OS

Telness Tech
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About

OpenSim is a travel eSIM service that provides prepaid mobile data plans for travelers. Users can browse and compare country, regional, and global eSIM plans online, choose a destination and data package, purchase securely, and install their eSIM using one-click setup, QR code, or manual installation details. OpenSim helps travelers stay connected while abroad without replacing their primary SIM. Plans support destinations worldwide, with both fixed-data and unlimited options available depending on the destination. Travelers can check eSIM compatibility, compare available plans, and activate their eSIM when they arrive at their destination. OpenSim also provides travel connectivity resources and setup guidance to help users prepare for international trips.

About

Seamless OS is a cloud-native BSS/OSS telecom platform from Telness Tech that eliminates traditional telecom complexity by combining core billing, customer operations, service activation, and network-agnostic management into a single, fully automated stack designed for fast, digital-first mobile service delivery. It enables companies to launch their own branded mobile operators by supporting prepaid and postpaid plans, eSIM and travel eSIM products, mobile apps, checkout and payments, regulatory billing and taxation, and complete subscriber lifecycle management with modular APIs and webhook integrations. Built-in AI and agentic capabilities automate workflows, customer support, and operational tasks to reduce overhead and future-proof services for the AI era, while the platform’s flexible, modular architecture lets operators configure, bundle, and upsell products such as data packs, devices, and value-added services.

Platforms Supported

Windows Not Supported
Mac Not Supported
Linux Not Supported
Cloud Supported
On-Premises Not Supported
iPhone Supported
iPad Supported
Android Supported
Chromebook Not Supported

Platforms Supported

Windows Not Supported
Mac Not Supported
Linux Not Supported
Cloud Supported
On-Premises Not Supported
iPhone Supported
iPad Supported
Android Supported
Chromebook Not Supported

Audience

Travelers / International Travelers / Consumers

Audience

Telecom operators, mobile virtual network operators, digital brands, and non-telecom companies that want to launch, run, or scale fully digital mobile services

Support

Phone Support Not Supported
24/7 Live Support Not Supported
Online Supported

Support

Phone Support Supported
24/7 Live Support Not Supported
Online Supported

API

Offers API Not Supported

API

Offers API Supported

Screenshots and Videos

No images available

Screenshots and Videos

Pricing

$0.60
Free Version Not Supported
Free Trial Not Supported

Pricing

Free
Free Version Supported
Free Trial Not Supported

Reviews/Ratings

Overall 0.0 / 5
ease 0.0 / 5
features 0.0 / 5
design 0.0 / 5
support 0.0 / 5

This software hasn't been reviewed yet. Be the first to provide a review:

Review this Software

Reviews/Ratings

Overall 0.0 / 5
ease 0.0 / 5
features 0.0 / 5
design 0.0 / 5
support 0.0 / 5

This software hasn't been reviewed yet. Be the first to provide a review:

Review this Software

Training

Documentation Supported
Webinars Not Supported
Live Online Not Supported
In Person Not Supported

Training

Documentation Supported
Webinars Not Supported
Live Online Supported
In Person Not Supported

Company Information

OpenSim
Founded: 2025
Portugal
www.getopensim.com

Company Information

Telness Tech
Founded: 2020
Sweden
telnesstech.com

Alternatives

Alternatives

TelcoEdge

TelcoEdge

TelcoEdge Inc.
Code eSIM

Code eSIM

Aircode
Csmart Digital BSS Platform

Csmart Digital BSS Platform

Covalense Digital Solutions

Categories

eSIMs Supported

Categories

OSS/BSS Supported

Integrations

No info available.

Integrations

No info available.
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