is it possible to bridge more than 2 isp provider using pfsense? what router or device can bridge 2 or more isp providers in a router? i am planning to bridge at lease 5 isp providers to create a very good internet connection, what can i do to link all 5 providers in 1 router?
Yes, pfSense can set up outgoing load balancing with any number of WAN ports. I successfully used it with 7 internet connections a few years ago.
Configure each WAN port as a gateway, and then put them all in the same gateway group. Then use a firewall rule to direct all traffic to that gateway group, instead of a specific WAN port.