Cold email for a B2B consulting firm. 18 months and 420K revenue later

consulting_ops · 2026-04-06 · 2,980 views

B2B consulting firm, operations-focused engagements for mid-market companies. Sales cycle runs 12 to 18 months from first touch to signed SOW. Engagement sizes range from $15K for a scoped project up to $50K for a full transformation. I\'m writing this after 18 months of running cold email as one of three pipeline sources, and the numbers are worth sharing because consulting-firm cold email rarely gets documented honestly.

The infrastructure. 15 PuzzleInbox Google Workspace inboxes, spread across 5 domains. Instantly as the sending platform. Apollo Pro for data. Total monthly spend across infrastructure, sending, and data was about $580.

The sending cadence. 12 to 15 emails per inbox per day, staying conservative because consulting ICPs are small and we didn\'t want to burn the addressable market. That\'s roughly 200 cold emails per day across the full setup, or 4,000 to 4,500 per month.

The sequence. 4 touches over 14 days. First touch: short, pattern-interrupting opener tied to a specific operational challenge we\'d solved for a similar company. Second touch: case study snippet with numbers. Third touch: direct question about whether the challenge was relevant. Fourth touch: polite exit. No links in touch one, minimal links overall.

The reply rate. Averaged 2.8 percent across 18 months. Not spectacular by SaaS standards, but consulting ICPs are senior operators who get a lot of pitches and are harder to reach. Reply rate held steady the whole 18 months with occasional dips after Google policy changes.

The pipeline. Positive replies averaged about 45 percent of all replies. From positive reply to scoped conversation: another 40 percent. From scoped conversation to signed engagement: about 12 percent. The consulting conversion path is long and it loses people at every stage, which is why the top of the funnel has to be fed consistently.

The closed deals. 8 new clients over 18 months sourced entirely from cold email. Average engagement size: $52,500. Total revenue: $420K. Cost to acquire: $580 per month times 18 months, plus labor for sequence management and reply handling. All-in acquisition cost: roughly $15K. Revenue per dollar spent: 28x.

The lessons. Long sales cycles mean cold email pipeline has to be patient. The deals we closed in month 14 had first touches in month 2. Stopping cold email during slow months would have killed the pipeline 14 months later. Second lesson: consulting replies look different from SaaS replies. A "let\'s talk in 6 months" from an operations VP is pipeline, not a brush-off. We tracked those in a follow-up queue and about 35 percent of them converted when we reached out at the stated time.

Cold email works for high-ticket consulting. The cycle is long, the volume is modest, and the ROI compounds over time. If you\'re running a services business with $15K plus engagements, this channel deserves a serious look.