There's a part of email production that nobody talks about enough. Not the design. Not the strategy. Not the copy.

The upload.

Every email design your agency produces: welcome flows, campaigns, abandoned carts, seasonal sends, has to make the journey from your design file into Klaviyo before it can go anywhere near a subscriber. And if you're doing that process manually, you already know what it costs you.

Twenty-five minutes per email, on average. Slicing the image, exporting sections, uploading each one to Klaviyo's template builder, mapping links, checking rendering. Multiply that across every brand you manage and every email you send in a month, and you're looking at a meaningful chunk of hours spent on pure production overhead.

We found a tool that cuts that down to under a minute. Here's how it works.

The Problem With Manual Slicing

If you've ever taken an email design from Figma (or Photoshop, or any other tool) and uploaded it to Klaviyo manually, you know the process. Export the full design as an image. Open a slicing tool or do it by hand. Cut the design into horizontal sections — header, hero, product block, footer, CTA. Export each slice. Upload each image to Klaviyo's asset manager. Drag each block into a template. Map the link on each clickable section. Check the rendering on desktop and mobile. Fix the things that broke.

It is genuinely tedious work. It requires no creative thinking. It adds zero value to the email's performance. And it takes 20-30 minutes every single time.

For an agency managing 10 brands sending three campaigns each per month, that's 30 uploads. At 25 minutes each, that's 12.5 hours a month spent doing production admin that a tool can now do in one minute.

What Grotto Slice Does

Grotto Slice is a Figma-to-Klaviyo workflow tool built specifically for email agencies and marketers who are tired of the manual upload process.

The workflow looks like this:

They also have a Figma plugin now, which takes it one step further — you can push directly from Figma to Klaviyo without even exporting an image first.

Why This Matters for Email Agencies Specifically

They quote 6.2 hours saved per brand per month based on average email volume. If you have 5 brands, that's 31 hours a month — nearly a full working week — recovered from production admin and redirected toward strategy, client relationships, or growth.

But beyond the raw time saving, there's an operational benefit that's harder to quantify. When getting an email from Figma to Klaviyo takes one minute instead of 25, the feedback loop gets faster. Your team can make last-minute changes without it becoming a production crisis. You can iterate on templates without dreading the rebuild. You can onboard new brands faster because the production overhead per email is almost nothing.

It changes the texture of how your agency operates.

How We Use It at Marz Media

At Marz Media, we design emails in Figma for our agency partners across dozens of ecom brands. Getting those designs into Klaviyo as ready-to-send templates — fast, accurately, and without any manual slicing overhead — is part of what makes our 72-hour turnaround possible.

Grotto Slice is part of that workflow. The auto-slicing is clean and accurate, the Figma plugin integration saves the export step entirely, and the one-click Klaviyo push means our team can get a finished design live in a fraction of the time it used to take.

For any agency managing email design at volume, this is the kind of operational improvement that compounds over time. Every hour recovered from production admin is an hour that goes somewhere more valuable.

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