Can I use the same subscription plan to connect with both businesses and investors?

There are separate plans to connect with businesses and investors. Buy side plans helps you connect with business owners and Sell side plans helps you connect with investors by sending your business proposal.

If you want to connect with a business, you need to have a valid investor profile and subscribe to a buy side plan.

If you want to connect with investors, then you need to have a valid business profile and subscribe to a sell side plan.

Subscription plan details can be found here.