The exact monthly cost breakdown of running cold email at 2000 emails per day
ops_mike · 2026-04-01 · 2,560 views
People always ask what cold email actually costs at real scale. I manage outbound for 3 B2B SaaS clients and we send a combined 2,000 cold emails per day. Here is every single cost, no rounding, no hiding anything.
Inboxes: 134 total from PuzzleInbox
- 80 Google Workspace inboxes at $4.00 each = $320 (one-time, replaced every 3-4 months, so ~$93/month amortized)
- 54 Outlook 365 inboxes at $0.35 each = $18.90 (one-time, replaced every 3-4 months, so ~$5.50/month amortized)
- Amortized monthly inbox cost: $98.50/month
Domains: 45 domains
- Namecheap registrations at ~$10/year each = $450/year = $37.50/month
Sending platform: Instantly Hypergrowth
- $77.60/month
Data: Apollo Professional
- $79/month
Email verification: ZeroBounce
- ~40,000 verifications per month at pay-as-you-go = $65/month
Enrichment: Clay Growth
- $149/month (used for 2 of 3 clients who need deeper personalization)
Monitoring: GlockApps
- $59/month for inbox placement testing
Total monthly cost: $565.60
Now here is the part that makes this all make sense.
Results at 2,000 emails/day:
- Average reply rate across all campaigns: 3.9%
- Daily replies: ~78
- Positive reply rate: ~45% of total replies
- Daily positive replies: ~35
- Meeting conversion from positive replies: 50%
- Meetings booked per day: ~17-18
- Monthly meetings booked: ~370
Cost per meeting: $1.53
Read that again. A dollar fifty three per meeting. At enterprise ACV of $30K+, even a 5% close rate from those meetings means each meeting is worth $1,500 in expected revenue. I am paying $1.53 to generate $1,500 in expected value.
The biggest cost most people miss is their own time. I spend about 15 hours per week managing these campaigns: list building, copy iteration, monitoring deliverability, client reporting. If you value your time at $100/hour, that adds $6,000/month and changes the cost per meeting to ~$17.75. Still absurdly cheap compared to any other channel.
The reason the infrastructure cost is so low relative to output is PuzzleInbox. Pre-warmed inboxes mean I do not pay for warmup tools ($15-20/inbox/month would add $2,000+ to my monthly costs). DNS is configured on delivery so I do not spend hours on setup. And the deliverability is consistent enough that I am not constantly replacing burned inboxes.
If you are running cold email at any serious volume and your cost per meeting is above $20, something in your stack is wrong. Fix your infrastructure first. That is where the biggest cost savings come from.