Starlink or 4G/5G for your backup link? The honest answer.
Both are genuinely excellent — they just fail in different ways. For a site that can't afford to go dark, the resilient answer is usually both, run as diverse paths with automatic failover.
It's not which one wins — it's how they fail.
Ask "Starlink or 4G/5G?" and you'll get a dozen confident, contradictory answers. The truth is duller and more useful: both are excellent technologies, and for most sites the sensible choice isn't one over the other — it's understanding how each one drops out.
Cellular depends on a local mast. When that mast is congested, has an outage, or simply doesn't reach your site well, 4G/5G suffers. Starlink depends on a clear view of the sky. Heavy weather, obstructions or a fault on the dish affect it instead. Crucially, those failure modes are independent — the thing that knocks out one rarely touches the other. That's the whole engineering point, and it's why a critical site usually wants both.
Starlink and 4G/5G, weighed honestly.
Two strong bearers with different characteristics. Here's where each shines — and where each needs watching.
Starlink (LEO satellite)
Low-earth-orbit satellite that works almost anywhere with a clear sky. The go-to bearer when there's no fibre and cellular coverage is thin.
Strengths
Reaches almost anywhere in the UK.
High throughput, well beyond weak cellular.
No dependence on a local mast.
Watch-outs
Needs a clear view of the sky.
Obstructions and heavy weather can dip it.
Uses CGNAT unless a static IP is added.
4G / 5G (cellular)
High-throughput mobile connectivity with the right antenna and carrier. Excellent, low-latency performance wherever mast coverage is strong.
Strengths
Very low latency for real-time traffic.
Cheaper to run and fast to deploy.
Superb where local masts are strong.
Watch-outs
Depends on local mast coverage.
Can suffer from congestion at peak.
Needs a good external antenna to perform.
How to choose between them.
If you're picking a single bearer, weigh these four factors against your site.
By location & signal
Strong local mast? 4G/5G is hard to beat. Weak or no coverage with clear sky? Starlink wins outright.
By latency needs
Voice, gaming or tight real-time control favour cellular's lower latency. General data and bandwidth favour Starlink.
By budget
4G/5G is usually the cheaper monthly bearer. Starlink costs more but buys reach and throughput cellular can't reach.
By criticality
If downtime hurts — SCADA, CCTV, payments, remote access — don't choose one. Run both with automatic failover.
Why the best answer is usually both.
For anything you can't afford to lose, the winning move isn't picking a bearer — it's removing the single point of failure entirely.
Starlink and 4G/5G have diverse failure modes: weather and obstruction on one, mast congestion and coverage on the other. Held live together, the odds of both dropping at the same moment are vanishingly small. Our router runs automatic failover between them, keeps one static IP that persists across both so VPNs and remote access never blink, and presents it all as a single managed link you never have to think about.
How we set it up.
Survey both
A site survey checks sky view for Starlink and mast coverage for 4G/5G, so each bearer is sited to perform.
Configure failover
We terminate both bearers into a managed router, set the primary path and tune automatic failover and return.
Static IP
We add a persistent static IP that stays constant across both bearers, keeping VPNs and inbound services stable.
Monitor
We watch both paths 24/7, alert on any degradation and act before a single-bearer wobble becomes an outage.
Starlink vs 4G/5G — your questions answered.
Is Starlink or 4G better for failover?
Can I keep one IP address across both Starlink and 4G/5G?
Will it fail over automatically?
Which is cheaper to run — Starlink or 4G/5G?
Can you manage it for me?
Stop choosing. Run both, properly.
Tell us your location, your signal and what the site runs. We'll design diverse, failover-protected connectivity that holds.