Backup Internet for Business: Options, Costs and How to Set Up Failover
Short answer
The best backup internet for a business uses a different path from your main line, so one fault can’t take out both. Common options are a 4G/5G cellular router, a second wired ISP, or Starlink satellite internet. Pair it with a failover router that switches automatically and a UPS for power. For short-term needs, such as an office move or a temporary site, renting Starlink avoids a contract.
Key takeaways
- Choose a backup that doesn’t share cables, poles or towers with your main connection.
- Cellular (4G/5G) is cheap and quick but depends on local towers, which can be congested or down too.
- Starlink takes a completely separate path through low-Earth-orbit satellites.
- A failover (dual-WAN) router switches traffic automatically when the main line drops.
- Put the modem, router and Starlink on a UPS; a Starlink Standard kit draws about 60–90 W.
What is backup internet for a business?
Backup internet is a second connection that takes over when your primary line fails, so card payments, VoIP phones, cloud apps and bookings keep working. The key is diversity: if the backup uses the same street cable or the same cell tower as the main line, one fault can take out both.
What are the main backup internet options?
| Option | Strengths | Weaknesses | Best for |
|---|---|---|---|
| 4G/5G cellular router | Low cost, quick setup | Shares towers with the public; can be slow in busy areas or outages | Small shops, light use |
| Second wired ISP | Fast and stable | May share poles or conduit; installation lead time | Offices with two providers available |
| Starlink | Independent satellite path, fast, low latency | Needs clear sky and power; monthly plan if bought | Rural sites, critical uptime, temporary sites |
How does automatic failover work?
A dual-WAN or failover router connects to both your main line and your backup. When it detects the primary is down, it sends traffic over the backup and switches back once the primary recovers. Starlink can feed a failover router over Ethernet (the Standard kit’s router has an Ethernet adapter option, and the Mini has an Ethernet port). Test failover by unplugging the main line before you rely on it.
Don’t forget power
Internet backup is useless if the power is out. Put your modem, router, network switch and backup connection on an uninterruptible power supply (UPS). Size it for the load: Star Surf lists the Standard kit at about 60–90 W and the Starlink Mini averages about 25–40 W. Our power station guide shows runtime math.
When does renting Starlink make sense for a business?
Renting works well for short-term risks: an office move while the new line is installed, a temporary site or pop-up, a busy season when downtime is expensive, or testing Starlink at your location before buying. Star Surf rents kits from $20/day (2-day minimum, or $50 for a single day) or $150/week with unlimited data, and quotes monthly and multi-kit setups. See business and multi-kit rentals and our business continuity guide.
Our recommendation
Waiting on a new line, moving offices, or heading into your busiest season? Rent Starlink as a backup for the risky weeks, with no contract and unlimited data.
Reserve a Starlink kitAsk us a questionFAQs
What is the best backup internet for a small business?
One that uses a different path from your main line. Cellular is cheapest; Starlink is the most independent; a second ISP is fastest where available.
Can Starlink be used as backup internet?
Yes. Connect it to a failover router so traffic switches automatically when your main line drops.
How much does backup internet cost?
Cellular backup plans and second lines vary by provider. Starlink can be rented from Star Surf from $20/day or $150/week, or bought with a monthly plan.
Do I need a special router for failover?
You need a dual-WAN or failover-capable router, or a firewall with failover features.
Need Starlink for a few days or a few weeks?
Rent from $20/day. Pick up in American Fork, UT, or have it shipped anywhere in the US in a protective hard case.
Check availabilityMulti-kit & event quotesAbout Star Surf
Star Surf is a Starlink rental company based in American Fork, Utah. We rent Starlink Mini and Standard kits from $20/day (2-day minimum) or $150/week with unlimited data, for pick-up in Utah or shipping anywhere in the US, and supply multi-kit setups for events, job sites and businesses. Check availability.
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Sources
Prices, plans and speeds are as reported in our sources (checked November 2026) and change often; check starlink.com before you buy. Starlink® is a trademark of SpaceX. Star Surf is an independent rental company and is not affiliated with Starlink or SpaceX.