Backup service - Dual WAN

Are there any existing, or upcoming Dual-WAN solutions to use as a failover/backup service?
As the need to stay connected increases, the backup provider solution becomes even more viable as a sales tool.
If not Cambium, is there another solution other WISPs use for this?

Mikrotik routers

I’d highly recommend Peplink Routers. They’re built for this and are extremely easy to configure and deploy. I use one at home to balance over a cable ISP, a WISP, and an LTE 4G connection.