Listing.Agency has an agreement with many exchanges, which will allow you not to waste time searching for the right contacts, negotiating conditions and so on. All work has been done for you.
If you got any bundled offers, please do mention them as I remember some devs were looking for more number of exchanges in short period of time for various reasons.
I believe you might need to add "coins" in your subject as your site is dealing for both coins and tokens for exchange listing.