Scalestack vs. Instantly

We believe software should serve people, not the other way around. Scalestack is the governed layer between your database and execution. Trusted, AI-ready context available everywhere. We put our AI agents to work cleaning and enriching your data, and turn the results into governed workflows your teams and agents can trust and run on. Replace disconnected and duplicated processes with one controlled layer across your existing systems. Give every team and agent reliable access, clear oversight, and cost visibility.

Instantly turns leads into clients with Automated Outreach, Deliverability Network, Sales Engagement, B2B Lead Database & AI-Powered CRM. Find your leads, create your campaigns, connect your sending accounts, and watch those leads turn into customers - with one, flat-fee subscription. Founded in 2021, Instantly is the leading sales engagement platform used by more than 35,000 customers, from solopreneurs to global agencies. Our goal is to be the simplest tool on the market to make money with cold email.