Three providers sharing a single public IP address.
Three providers sharing a single public IP address.
They are seeking information at https://www.openmptcprouter.com/
I understand now. My mistake! English isn't my first language, so sometimes it's a bit tricky. Regarding performance, do you know if the speeds are practical to use?
Speed depends on two elements. First, the connection speed between the router and the VPN server. Second, the extra latency introduced. Neither is fixed; you’ll need to test it yourself. I think the MPTCP project shared by @Alex Atkin UK could suit you well, just make sure to rent a VPS rather than opt for a regular VPN service.
Let me know how you're doing. I set up a VPS for this but didn't test it because I didn't want to introduce another point of failure or replace my router. It added complexity to my network setup. Instead, standard load balancing works if your router supports policy routing, letting you restrict certain banking sites to a single WAN. I've noticed most websites function perfectly with your IP changing between WANs, and I haven't had any banking issues either.