The lab

Tools we built to make email less boring

We got tired of clunky workflows and missing features. So we built our own tools. They're free. Use them however you want.

Free tools

Available Tools

Marketing Glossary

Email marketing and newsletter terms, definitions, and best practices. Covers everything from email deliverability to campaign optimization, in plain English.

EmailLearningReferenceDefinitions
Browse glossary

TapLoop

Add a one-click poll to your next email. Build better segments and lift your click rate while you're at it. Free to start.

EmailPollsEngagementSegmentation
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Message Mocks

Convert Slack messages into beautiful PNG images. Great for sharing conversations, testimonials, or feedback in presentations and marketing materials. 100% free!

SlackImagesMarketing
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The Email Oracle

Divine the cosmic fate of your email campaign. Enter your subject line and get a mystical reading on your email's destiny. For entertainment purposes only!

EmailFunEntertainment
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HubSpot Email MCP

A Model Context Protocol server for HubSpot emails. Enables AI assistants like Claude or Cursor to read, analyze, and even upload emails to HubSpot just by talking to them.

MCPHubSpotAPIAI
View on GitHub

Inbox Defender

Space Invaders, but the aliens are cold outreach and "just following up" emails. Blast through the noise before it buries you. No promises your own emails would survive.

GameFunMarketing
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The Inbox

100+ brands, full email sequences, updated daily. See exactly what the best companies send—welcome flows, promos, win-backs, all of it.

EmailResearchSwipe FileInspiration
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Work with us

Need more than a tool?

We build tools for fun. Mapping the machine behind your revenue is the day job.

Start with the Map

Start here

Start with the Map

Our whole-machine leak audit. Starts at $2,000, fully credited toward The Build.

The Whole Machine

Our newsletter. One hidden revenue system mapped every week, with receipts from 250M+ emails. Subscribe.