Minimal Tech Stack Advice

Working to get my sales team away from SEPs like Outreach and SalesLoft. A few reasons for this, deliverability and removing the ability to rely on lazy prospecting among them.

Looking for advice on minimal tools to assist with sales outreach -- Our channels are email, LinkedIn, and phones.

Ideally something simple like gmail plugins to help monitor/remind follow ups, steps, etc. Pretty much just a step or two above keeping a manual calendar to manage territory progress.

All suggestions are welcome, thanks in advance!