About us

Every platform tells you it won. The bank account tells you the truth.

Tatheon wasn't built in a boardroom. It was built out of frustration.

Meta says it drove the sale. Google says it drove the same sale. Klaviyo puts its hand up too. Add the dashboards together and you've done three times the revenue you actually did. Meanwhile the one number that matters, what's left at the end of the month, is sitting in a spreadsheet nobody's opened since Tuesday.

We built Tatheon because that's an impossible way to run a business.

Down to the SKU

Good ecommerce brands aren't separated by better creative or a bigger budget. They're separated by whether the founder knows their exact numbers. Not at a store level, at a SKU level.

Which product actually makes money after COGS, shipping, discounting and ad spend. Which bestseller is quietly subsidising a loser. Which bundle looks like a win in revenue and is a loss in margin. Which channel deserves the next dollar.

Most brands can't answer those questions in under a week. Tatheon answers them before your coffee's cold.

One outcome: profit

A price change is a P&L decision, a sales decision and a marketing decision at the same time. So is a discount, a new hire, a bundle, a bulk order, a channel test.

Most tools show you one slice and let you guess at the rest. Tatheon pulls your P&L, your sales and your marketing into a single view so you can see how a decision travels through the business and lands where it counts.

Not more data. Less noise, and a clear answer.

Built by operators, for operators

Tatheon is the system that ran an eight-figure Australian ecommerce brand, one bootstrapped from a garage with no outside funding, no safety net, and half a million customers served.

It wasn't designed as a product. It was designed as a survival tool, then refined over years of real decisions with real money on the line. Every metric in it exists because a founder needed it at 11pm on a Sunday.

Now it's yours.

Know your numbers. Make the call. Keep the profit.

Letter from the founder

From the desk of Jaydan Brennan

I started Hercules Supplements in a garage with my mum.

No investors. No runway. No safety net. Every dollar we spent was a dollar we'd already earned, which means every decision I made had a real consequence, not a line item in someone else's fund.

That's a good way to learn a business. It's also a terrifying one.

For the first few years I ran on gut feel and momentum. Then we got big enough that gut feel started costing me money. I'd open Meta and see a 4x return. Open Google and see another. Open Klaviyo and it had apparently driven half of it as well. Every platform was the hero of its own story. Add them up and we'd tripled our revenue on paper while the actual bank balance hadn't moved.

I couldn't make a confident decision. Not one.

So I stopped trusting the dashboards and started building my own. It began as a spreadsheet, a bad one. Then a better one. Then a system that pulled everything into one place: cost of goods, shipping, discounting, ad spend, returns, subscription revenue, all the way down to the individual SKU.

The first time I ran it properly, I found products I'd been proud of that were losing money on every unit, and quiet performers I'd been under-investing in for a year.

That's the moment the business changed. Not a viral ad. Not a new supplier. Just finally being able to see clearly.

We grew Hercules past eight figures and past 500,000 customers on the back of that clarity. Not because we were smarter than anyone else, but because we knew our numbers when our competitors were guessing at theirs.

Here's what I believe after a decade of this: the founders who win aren't the ones with the best creative or the biggest budget. They're the ones who understand how a single decision moves through the P&L, through sales, through marketing, and out the other side as one number.

Profit. That's the only scoreboard.

Tatheon is the tool I built to see it. I didn't set out to sell it. I built it because I needed it, and I kept building it because it worked. Enough founders asked me what I was looking at that it stopped making sense to keep it to myself.

If you're running a brand and you can't tell me what your best-selling SKU actually makes you after everything comes out, that's not a failure. That's the industry. Nobody built you the tool.

We did.

Jaydan BrennanFounder, Tatheon

See it on your own numbers

Connect Shopify and the board is reporting real revenue in about ten minutes. Everything else adds a layer on top of it.

Open Tatheon