I will not promote. Single lead gen tool (e.g leadsnavi, leads forensics) or apollo for a small B2B SaaS? Suggestions needed.

I'm working on a small B2B SaaS business, and we're still in the early stages. We're spending about two-thirds of our time on product development, so we're looking to simplify the sales process. I know Apollo is mature and reliable, but it's a bit over our budget at the moment. Other single-function lead generation tools are cheaper and definitely, although they have fewer features. For more, there are various levels of leads gen tools, leadfeeder bit more expansive than leadsnavi, but with some more functions. My question is: should I stick with a single-function lead gen tool for now, like only speed up some part of selling, or invest in Apollo to automate the entire process, even with the higher price? BTW further suggestions needed. I will not promote