62 Emails. 58% Open Rate. No SDR. Here’s the Full Setup.
This is a live campaign. Not a case study. Not a reconstruction. I’m writing this while it’s running.
We used Sandbox to run our own GTM — because if we’re going to tell operators this works, we should be doing it ourselves. Here’s what the numbers look like right now.
Industry average open rate for cold email: 21%. Ours is 58%. No SDR, no copywriter, no cold email specialist. One tool. One prompt to get it started.
The Setup (What Sandbox Built)
The campaign runs through Smartlead, but Sandbox built it. Here’s what that looked like:
- ICP definition — We described the target: serial entrepreneurs and small business operators, 5–50 employees, doing their own GTM without a sales team.
- Prospect sourcing — Sandbox queried Apollo for 700+ matching contacts. Filtered, deduplicated, imported.
- Sequence writing — 54 email sequences written across two campaigns. Different angles: capacity problems, tool-stack traps, pipeline math, social proof, re-engagement, direct asks. All written by Sandbox.
- Campaign configuration — Mon–Fri 9am–6pm PT, 30 emails/day max, 5-day delays between sequences, stops on reply. Configured automatically.
- Launch — Live. Not staged for review. Sending.
The Sequence Architecture
Here’s a sample of what’s running. Each sequence has a distinct angle — the goal is to find the hook that resonates for each operator on the list.
| Seq | Angle | Format |
|---|---|---|
| 01 | Capacity problem — you have 4–8 hours for GTM but need 20–30 | Problem frame + demo ask |
| 06 | Tool-stack trap — 12 tools, still doing it manually | Question hook, link to blog |
| 20 | Direct ask — “Can I show you this in 20 minutes?” | Single CTA, no content |
| 42 | Reply bait — “Quick question about your follow-up cadence” | 3 sentences, no links, direct question |
| 52 | Break-up — “Last note from me” | Short, personal, direct cal.com link |
New sequences get added every few days. Each one tests a different angle or format.
What This Costs vs. What You’d Pay Otherwise
- SDR: $70–90K/year + commission
- Copywriter: $3–5K/month
- Prospect list: $400–800/month (Apollo)
- Sequencer tool: $150–300/month
- Ramp time: 60–90 days before first send
- One prompt to define the campaign
- Sequences written in the same session
- Prospects sourced and imported automatically
- Campaign live the same day
- No headcount. No ramp.
The Part That’s Still Broken
I want to be honest: 58% open rate, 0 replies.
The campaign is working at the deliverability and subject-line layer. We’re getting attention. Converting that attention to a booked call is the next problem to solve — and we’re running experiments now (reply-bait formats, no-link sequences, break-up emails).
This is what dogfooding actually looks like. You learn where the real problem is, not where you thought it was.
The interesting thing: we couldn’t even have this conversation without Sandbox running the campaign. If we’d been doing this manually, we’d have 12 emails sent and no data to learn from. The volume of execution is what creates the signal.
What Operators Ask When They See This
The most common question: “How long does this take to set up?”
One session. 20–30 minutes of your input (ICP, value prop, which sequences to prioritize). Then it runs.
The second question: “Do you need technical skills?”
No. You describe what you want in plain language. Sandbox figures out the configuration.
The third question: “What do I do when someone replies?”
That’s your job. Sandbox handles the execution layer. You handle the conversation. That’s the right division of labor.
Want to see the actual campaign?
I’ll walk you through the live setup — the sequences, the prospect list, the analytics. You’ll see exactly what 58% open rate looks like in practice, and how it would work for your business.