Honest review after 30 days of using CorporateOS for cold outreach

I'll keep this straightforward. I tested CorporateOS for 30 days for our agency's outbound. We do B2B marketing consulting and needed a reliable way to find decision makers at mid-market companies.
What worked: The lead building is genuinely different. Instead of searching a database and hoping the data is current, you describe what you're looking for and it builds the list. We got contacts with names, roles, LinkedIn profiles, verified emails, and company context. The scoring system tells you why a lead ranked high, which is useful when prioritizing who to reach out to first.
The email sequencing is solid. Nothing fancy, but it does what it needs to do. You write your intro, follow-up, and break-up emails, review them before they send, and the system handles scheduling. The approval-first model means nothing goes out without you seeing it, which is important for us because we manage outreach for clients.
What I didn't love: The UI takes a day to get used to. It's not ugly but some of the navigation could be more intuitive. Also no LinkedIn outreach integration yet, which would make it a true all-in-one.
Bottom line: For the price, it replaced three tools for us. Apollo for leads, Instantly for sending, and a Google Sheet for tracking compliance. One platform instead of three. Our booking rate improved by about 3x, mostly because the leads were actually fresh.
Worth a look if you're running outbound and tired of the Apollo-Instantly-spreadsheet combo.