We went from 0 to 250K ARR using nothing but cold email. Complete breakdown

arr_machine · 2026-03-15 · 3,890 views

SaaS company. We started with absolutely zero pipeline and built to $250K ARR using nothing but cold email. No paid ads. No content marketing. No referrals. Just cold email. Here's the complete monthly progression.

Month 1: 6 PuzzleInbox Google Workspace inboxes. 72 cold emails per day. Terrible copy, 1.2% reply rate. 2 demos booked. 0 closed. Infrastructure cost: $27.

Month 2 to 3: Rewrote all sequences. Tightened ICP to Series A SaaS companies with 20 to 50 employees. Reply rate jumped to 3.1%. 12 demos booked. 4 closed at $800 MRR each. $3,200 MRR. Infrastructure cost: $27/month.

Month 4 to 6: Scaled to 20 inboxes. 240 emails/day. Added a case study email to the sequence. Reply rate stabilized at 3.8%. 8 to 10 new customers per month. Hit $18K MRR by end of month 6. Infrastructure cost: $90/month.

Month 7 to 8: Scaled to 40 inboxes across Google Workspace and Outlook. 480 emails/day. Hired a part time VA to manage lead lists and reply sorting. Reply rate held at 3.5%. 12 to 15 new customers per month. Hit $42K MRR. Infrastructure cost: $180/month.

Month 9 to 12: Maintained 40 inboxes. Focused on closing efficiency rather than volume. Improved demo to close rate from 25% to 38%. Crossed $250K ARR in month 11.

Total infrastructure spend over 12 months: $3,800. That includes all PuzzleInbox inboxes, domains, Instantly subscription, Apollo data, and ZeroBounce verification. Revenue generated: $250K ARR. ROI: 65x. Cold email is the most capital efficient growth channel in B2B when the infrastructure is right.