Seeking Recommendations for Outbound Email Tech Stack

Hi All !!! 👋 Would some helpful people from our community be willing to share what tech stack they're using for outbound emailing (sequencing, enrichment, tracking, etc.)? For context: • We’re a lean team building out our stack — any guidance is greatly appreciated! • My co-founder and I recently launched Summit X Digital, a marketing and strategy firm focused on influencer marketing, brand partnerships, and digital storytelling.