SIMSY
Simplifying Cellular
SIMSY makes it easy to set up and manage your cellular devices.
Cellular connectivity with a difference.
Our global data SIM delivers secure and reliable multi network connectivity and messaging in over 140 countries. With no set up fees, a self service platform and competitive pricing from day one, SIMSY makes it easy to plan and scale your mobile operations.
Coverage
Multi network connectivity and messaging across 600+ networks in over 140 countries, with automatic failover.
Private
Your devices are not on the public internet and your data does not cross it. Nothing exposed, nothing to scan.
Self service
Set up your own networking, addressing and policy from the portal. No set up fees and nothing to request.
Pricing
Published rates from day one. Pay for the data you use, with credit that does not expire and no contract.
Compliance
Configuration and activity recorded as you work, covering much of what CRA, NIS2 and PSTI ask you to show.
From one developer SIM to a global sensor deployment.
Our cloud style mobile network means we can support all users, whatever the size of the deployment.
Developers
Buy a single SIM online and get the full API, CLI and MCP server from the first day. No account manager needed.
Enterprises
Every SIM, device, policy and record in one place, on your own network, with the controls your team already expects.
Systems Integrators
Deploy across sites and customers you do not control, with addressing and policy that fit each project separately.
Solution Providers
Build connectivity into your product and manage the whole estate through your own systems and interfaces.
SIMSY operates a scalable core network, which means our fully featured solution is available to everyone from day one without set up costs or complex integrations.
Some of the industries we serve
All the things you expect from a data SIM, and a whole lot more.
We provide all of the usual elements you have come to expect with mobile services. SIM and eSIM, private APN, multi network coverage. What sets us apart are the layers above this. Once you have used a SIMSY SIM you will not accept outdated networking methods again.
Private APN
Create your own, in real time, at no cost. Not a request with a fee and a lead time attached.
Grouping and management
Organise SIMs into groups and manage them together, or set any one of them apart.
Network addresses
Choose your own IP ranges and run multiple subnets, so devices fit the way your systems already work.
Traffic routing
Decide where traffic goes and what each SIM can reach, and change it without touching the device.
Integration
Drive the network from your own tooling, or add SIMs straight into environments you already run.
Visibility
See what every SIM is doing, when it changed, and what it sent, without waiting on a support ticket.
Three ways to reach your devices.
Because you control the network your SIMs sit on, you can reach your devices the way you would on any network you own. Nothing installed on the device and no gateway to run.
SIMSY Proxy
A secure link to one device when you need it, closed when you are finished. Nothing left listening.
SIMSY LAN
SIMs on a shared private subnet, reaching each other directly. Sites across a country behave like one network.
SIMSY Extend
Layer 2 handover onto the network you already run, addressed and authenticated by your own systems.
All of our remote access tools enable configurable secure remote access to your devices without needing to install additional clients or software.
Or bring your own.
Plenty of teams already have a way of connecting things and would rather not change it. You do not have to. Run your own tunnelling across a SIMSY network and integrate it however you want.
VPN
Keep the VPN you already run. SIMSY carries it, and your devices stay off the public internet on the way.
WireGuard
Run WireGuard between your SIMs and your infrastructure, with addressing you chose rather than addressing you were given.
Tailscale
Add your SIMs to your tailnet. No client on the device and no subnet router at every site.
We do not mind which you use. The network underneath is yours either way, and everything above it is your choice. What is important is that SIMSY enables you to configure tunnels privately, directly into the network. This removes the need for individual device tunnels and public facing entry points.
Built for people and for systems.
We provide the flexible interfaces required for modern infrastructure, meaning both humans and systems can interact with our network. Vital for automation, real time systems and professional support.
Portal
Manage SIMs, networks, policy and usage in one place, with everything visible and nothing hidden behind support.
API
Every action available programmatically, so your own systems can provision, configure and monitor without a person.
MCP
Connect an AI agent straight to the network, so it can query, diagnose and act within the policy you set.
CLI
Work from the terminal and script anything you do regularly, alongside the tools your team already uses.
Grab a SIM and get started, or get in touch if you'd like to know more.
Buy a SIM
Add credit and your Launch SIM is free. Packs, routers and hardware are in the store alongside it.
Go to the storeRead the docs
API reference, CLI, MCP server and worked examples. Everything you need to build against the network.
Developer portalTalk to us
Working out whether this fits, or planning something large. We will tell you straight either way.
Get in touch