Best Klaviyo Agency for Supplement Brands

Last checked October 2026 · Written by the Huge Win Media team

We run Huge Win Media, one of the picks below, so we are biased. Facts about other agencies come only from their own websites, and we say when another option fits you better.

Best for published pricingHuge Win Media
Best for big supplement brandsUnderground Ecom
Best for established 7-figure brandsFlowCandy

The picks at a glance

Option	Best for	Price
Huge Win Media (us)	Supplement brands on a fixed budget	From $1,000/mo. Flows from $3,500 one-off
Underground Ecom	Large supplement brands	Not published
FlowCandy	Established 7-figure supplement brands	Monthly Management from $5,995/mo. Accelerator from $8,500/mo. FlowCandy Insiders coaching $395/mo
FlowCandy	Running Klaviyo yourself with coaching	$395/mo (Insiders)

Why supplement brands need a different email program

Supplements are a repeat purchase. A customer who finishes a 30-day tub either reorders or quietly switches brands, so email revenue lives in the replenishment window more than in the first sale.

Claims are regulated, so copy has to sell without overpromising. Agencies used to beauty or fashion copy often get this wrong.

What email has to do for supplement brands

Replenishment timing
Time reorder reminders to the real usage cycle of each product, not a fixed day count.
Subscription conversion
Move one-time buyers onto subscribe-and-save with honest value, not pressure.
Bundles and cross-sell
Recommend products that are used together, based on what the customer already takes.

The picks

1. Huge Win MediaThat's us

Best for supplement brands on a fixed budget.

For a Canadian supplement brand, monthly email revenue went from CA$941 in February 2024 to CA$3,031 in May 2024, and email reached 27.4% of revenue.

Watch out: A team of about a dozen, not a Master Elite partner. Every account's strategy is set by Emma, our CEO, who has run email for ecommerce brands since 2018.
Price: From $1,000/mo. Flows from $3,500 one-off

2. Underground Ecom

Best for large supplement brands.

Underground Ecom lists AG1 among its clients and has 120+ retention marketers.

Watch out: Aimed at fast-growth and enterprise brands. Pricing not published.
Price: Not published

Huge Win Media vs Underground Ecom

3. FlowCandy

Best for established 7-figure supplement brands.

FlowCandy lists Kachava and Nutrabolt among its clients and publishes monthly management from $5,995/mo.

Watch out: Requires an established brand over 7 figures a year.
Price: Monthly Management from $5,995/mo. Accelerator from $8,500/mo. FlowCandy Insiders coaching $395/mo

Huge Win Media vs FlowCandy

4. FlowCandy

Best for running Klaviyo yourself with coaching.

FlowCandy Insiders is $395/mo with no long-term contract, per its site. You do the work, they coach.

Watch out: You still need someone on your team with time to build and send.
Price: $395/mo (Insiders)

Huge Win Media vs FlowCandy

Our pick

If you are under 7 figures, start with Huge Win Media's flow build and get replenishment right first. If you are a large brand and want a full CRM program, look at Underground Ecom or FlowCandy.

What we would do today

Find your most-sold SKU and how many days a customer takes to finish it. That number is your reorder email timing.
Check your cart and browse flows for claim language your compliance team would flag.
Count how many one-time buyers you have from 60 to 120 days ago. That is your subscription and winback audience.
Want a second opinion? Book a free 30-minute Klaviyo audit.

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Questions

What is the best Klaviyo agency for supplement brands?

For brands on a fixed budget, Huge Win Media publishes its pricing and has supplement results: a Canadian brand tripled monthly email revenue from CA$941 to CA$3,031. Large brands may prefer Underground Ecom (clients include AG1) or FlowCandy (clients include Kachava and Nutrabolt).

Which Klaviyo flows matter most for supplements?

Replenishment reminders timed to real usage, subscription conversion, post-purchase education, and winback for lapsed buyers.

Do supplement brands need SMS?

SMS can help with reorder reminders, but email does most of the work for education and cross-sell. Huge Win Media offers SMS as an add-on on Klaviyo.

Get a free 30-minute Klaviyo auditWe walk through your flows and tell you what we would fix first, even if you hire someone else.

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Best Klaviyo agency guides

Head-to-head comparisons

White-label for agencies

Facts about other agencies come only from their own websites, checked October 2026. Where an agency does not publish a price or number, we say so instead of guessing. Spot something out of date? Email emma@hugewinmedia.com and we will fix it.

Sources: flowcandy.com homepage · FlowCandy services and pricing · undergroundecom.com homepage · Huge Win Media pricing · About Huge Win Media · Case studies