The 1-Million-Subscriber Migration to beehiiv

Situation:

Rohan Mahtani, founder of Resume Worded—a career development SaaS platform—launched The Career Supplement, a weekly email newsletter delivering career advice, personal development tips, and productivity tools. The newsletter began as a way to deepen relationships with users beyond the job-search phase and eventually grew to over 1 million subscribers.

Challenge:

As the list scaled, Rohan’s self-hosted solution (Sendy) couldn’t keep up. Major issues included:

• Delayed sends (sometimes 24 hours for a single campaign)
• Analytics inaccuracies and delayed tracking links
• Difficulty debugging tech issues due to limited internal expertise
• Concerns over deliverability and subscriber experience at scale
  He needed a robust, growth-focused platform that could handle high volume, offer accurate metrics, and support monetization via sponsorships.

Solution:

Rohan migrated to beehiiv, drawn by:

• Enterprise-grade infrastructure with unlimited sends and high deliverability
• Advanced analytics and open/click tracking confidence
• A/B testing, 3D segmentation, and welcome automation features
• Smooth migration support: warm-up schedules, filtering out inactive users, and third-party validation of emails
• Flexible pricing not tied to monthly send volumes
• A responsive dev team continuously rolling out high-impact features

Results:

• Successfully migrated 700,000+ subscribers (on track to complete full migration)
• Achieved 50–60% open rates and strong CTR on active segments
• Improved reliability, sending speed, and deliverability
• Enabled new revenue streams through newsletter sponsorships

Read the full story here.