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Docs/Cold Email Tech Stack

01The $25,000/month stack

01Section 1 of 8

The $25,000/month stack we replaced

We used to spend $25,000 a month on lead data and the software to process it. We were doing a ton of work moving the same records between apps.

Now I use Claude Code to run the workflow, call the providers directly, and have Python process the files. One person on my team processed eight million leads on a 16 GB MacBook Air in a week.

We can pull 1 million leads in 20 minutes on our current setup. Then we find the missing emails, validate them, and make the file we're going to send. I keep those stages separate because I want to see which part is taking time and which part is costing money.

What we replaced

Old jobHow we do it now
Search in Apollo, ZoomInfo, or Sales Navigator; export whatever the database gives usSearch BlitzAPI, LeadOcean, and MoltSets against the same brief. Combine their coverage.
Move exports through Clay, Sheets, ChatGPT, and separate cleanup stepsGive Claude the brief and access to the tools. It handles the repetitive list work for us.
Buy another lookup for a contact we already foundCheck the list we already have. Pay to find only the missing information.
Treat the sequencer's reply-rate report as the resultUse OutFound to see which emails led to meetings, signups, customers, and revenue.
Run client sending through the old stackWe use Halo. 6 - Set up sending: Halo, Instantly, and costs shows the Instantly implementation you can access yourself.

Obviously I still pay for data and sending. What I've removed is the work of moving files between software, buying the same lookup again, and cleaning everything manually. The $200 processing subscription is one part of that bill. It isn't the whole cold email channel.

Video: How I Get 8M+ Leads Using Claude Code (For Cold Email)

Work out what comes off your bill

I start with last month's invoices and put them in this table. Include the person doing the work too. Their time has a cost.

ExpenseReplacement cost
Search and contact databasesProvider plans and usage
Finding and checking emailsPeople still missing usable contact details
Table software and processingClaude Code plus scripts
Operator timeMeasured time in the new workflow
Sending and mailboxesUse the budget in 6 - Set up sending: Halo, Instantly, and costs

By the end of this, I want one working replacement and a list of subscriptions I can take off next month's bill.