Business Growth

One Source of Truth: The End of Double Entry

October 16, 2026
•
3
min read
Christopher "Cisco" Leon

If your team types the same event, contact or price into more than one place, you don't have a data problem yet. You have a future data problem. Let's head it off.

An open brass compass on a dark wooden table

The double-entry tax

It starts innocently. An event goes into your ticketing platform, and then someone adds it to the website. A new customer goes into the invoicing tool, then the email list, then the spreadsheet. A price changes in one place and lives on, unchanged, in three others.

Every copy is a chance for a typo, a missed update or a round of "wait, which one is right?" And the person doing the copying could be doing literally anything more valuable.

What "one source of truth" means

It's a simple rule: every piece of information has exactly one home, and everything else reads from that home. Events live in your event platform. Contacts live in your CRM or newsletter tool. Website content lives in your website's CMS. When something changes, it changes once, in its home, and every other place updates on its own.

That's it. It isn't a product you buy. It's a decision about where things live, plus a few connectors that keep everything in step.

What it looks like in practice

At Blackwood Land Institute, events live in Eventbrite. When the team publishes an event there, it appears on their Webflow website automatically, and a nightly check keeps the two in step in case anything slips. Newsletter signups on the website go straight into Constant Contact. Website forms are verified, emailed to the right people and logged in the team's own app. Nobody types an event twice. (Here's the full story.)

Under the hood Most modern tools announce changes through webhooks, a message sent to a web address whenever something happens, like "event published" or "order placed." A small Cloudflare Worker receives that message, looks up the matching record by its ID in the source system, and creates or updates the right item in the destination through its API. Because webhooks can occasionally go missing, a scheduled job compares both sides and fixes any drift. Matching on IDs, not names, is what keeps a renamed event from turning into a duplicate.

Where to start

  • List the places you type the same thing twice. Events, contacts, products, team bios, prices, hours.
  • Pick a home for each. Usually it's the tool where the information is born.
  • Connect, don't copy. Most popular platforms have an API, which means they can be wired together.
  • Let people manage their own content. When your team can update the source themselves, the information stays fresh everywhere. That's a big part of why we build on Webflow, and why a website your team can't edit gets expensive.

When the home doesn't exist yet

Sometimes the honest answer is that the home hasn't been built. The information lives in a spreadsheet, a few inboxes and someone's memory. That's when a custom app earns its keep: one database, built around your business, that everything else connects to. We wrote about that in your spreadsheet is begging to be an app, and about building it right beside your website in your website needs a sidekick.

Our full partnership includes the app layer with no build fee, starting at $2,500 a month, and it all runs in accounts you own.

Tired of retyping? Tell us where it hurts. The consult is free.