For Business VKontakte I recommend using mobile proxies or resident for stable business.

Choose GEO: Russia

Here's my personal top proxy picks.

Mobile proxies:

I recommend buying Russian mobile proxies from Mobile Proxy Space - at the moment this is the best budget provider of high-quality mobile proxies from Russia (there may be problems with paying for them).

For other GEOs: Soax, ShopProxy.

IPv4 proxies:

For IPv4 it's advisable to buy individual ones to avoid blocks. You can purchase from Proxys.io (highly recommended!), Proxy6, Proxymania.

IPv6 proxies:

I get IPv6 proxies from Proxyline and Proxys.io.

Residential proxies:

Residential can be purchased from Shifter, Proxys and Proxy Sale.

Additionally, I recommend using promo codes, which can be found here. If you still have questions about which proxies are suitable for Business VKontakte, feel free to write, and I'll answer if possible.