Why I Killed an Email Rendering SaaS That Actually Worked

Building software is easy. Building software people continuously pay for is much harder.

A few weeks ago I built Render My Email, a SaaS that solved a problem I had personally experienced while building transactional emails.

The idea was straightforward.

Upload or write your email template.

Render it exactly how major email clients would display it.

Catch layout bugs before your customers do.

Technically, it worked.

Commercially, it wasn't worth pursuing.

This is the engineering story behind that decision.

The Problem

Every developer who has built HTML emails knows the pain.

Email clients are effectively twenty different browsers from twenty different decades.

Gmail strips CSS.

Outlook uses Microsoft Word as a rendering engine.

Apple Mail behaves differently.

Dark mode introduces another layer of chaos.

A perfectly valid HTML email can completely break depending on where it's opened.

The obvious solution seems to be previewing emails across clients.

So I built one.

Building It

The architecture itself wasn't particularly complicated.

An API accepted raw HTML or MJML templates.

Templates were normalized.

Rendering jobs were queued.

Multiple rendering environments generated previews.

The frontend compared outputs side-by-side.

Infrastructure costs stayed surprisingly low—around $16/month.

From an engineering perspective, it was satisfying.

Fast.

Reliable.

Minimal.

Exactly the kind of product I enjoy building.

Then Reality Happened

I started talking to potential customers.

Not friends.

Not other builders.

Actual people who might pay.

A pattern emerged almost immediately.

Most developers don't regularly test emails.

They send one.

Open Gmail.

Maybe Outlook.

If it looks acceptable, they ship.

Companies that truly care about rendering quality already use established platforms with years of accumulated compatibility work.

The customers in the middle—the ones who desperately needed this product and were also willing to pay—were surprisingly rare.

The problem existed.

The market didn't.

Those are two very different things.

Engineering Wasn't the Bottleneck

This is probably the biggest lesson.

Whenever traction is low, engineers instinctively blame the product.

Maybe the UI needs work.

Maybe performance could improve.

Maybe another feature would help.

But none of those mattered here.

The product already solved its intended problem.

Improving the solution doesn't help when too few people actually need the solution.

That's a distribution problem masquerading as an engineering problem.

The Unit Economics Were Fine

Infrastructure wasn't killing the business.

Monthly operating costs were tiny.

The software scaled well.

Margins would have been healthy.

In theory, fifty paying customers would already have made it profitable.

But profitability isn't the same as opportunity.

Even if I eventually reached one hundred customers, what then?

Would I spend the next three years competing against companies that already own this market?

Probably.

That's not where I wanted to spend my engineering time.

Opportunity Cost Is Real

Every side project competes with every future idea.

The question stopped being:

"Can this make money?"

Instead it became:

"Is this the best thing I could be building?"

The answer was no.

There are larger problems.

Problems companies experience every single day.

Problems painful enough that people actively search for solutions instead of being convinced they need one.

That's where I want to build.

Killing Projects Is a Skill

Startup culture glorifies persistence.

There's value in persistence.

But there's also value in knowing when evidence says to stop.

Shipping is a skill.

Marketing is a skill.

Knowing when not to continue might be the rarest skill of all.

Render My Email wasn't abandoned because it failed technically.

It was abandoned because continuing would have been an inefficient allocation of engineering time.

That's a much better reason.

What I'm Taking Forward

This project reinforced a few principles I'll use before writing another line of production code.

• Validate the market before polishing the implementation.
• Build around recurring pain, not occasional annoyance.
• Look for products with natural distribution instead of expensive education.
• Infrastructure costs matter less than customer acquisition costs.
• The fastest way to build a successful product is often to stop building the wrong one.

Final Thoughts

I'm glad I built Render My Email.

Not because it became a business.

Because it saved me from spending six more months building features for a market that wasn't there.

Good engineering isn't just about writing code.

Sometimes it's about deleting a roadmap.

And moving on before momentum turns into sunk cost.

A less measured version of the same story lives on bakaiti.