Magnet Monster vs Underground Ecom
Short answer: Magnet Monster is best for UK and global DTC brands that want unlimited multichannel sends on one fee. Underground Ecom is best for fast-growth and enterprise DTC brands that want full CRM strategy from a large team. Neither Magnet Monster nor Underground Ecom publishes prices, so you need a quote from each on the same scope.
We run Huge Win Media, a third option on this page, so we are biased. Facts about Magnet Monster and Underground Ecom come only from their own websites and their Clutch profiles.
At a glance
| Compared on | Magnet Monster | Underground Ecom |
|---|---|---|
| What they do | Retention marketing agency for fast-growth DTC brands, with unlimited sends for one flat monthly fee. | End-to-end email, SMS, and retention services from a large award-winning team, focused on fast-growth DTC. |
| Founded | About 7 years of retention work, per its site | Not stated |
| Based in | Registered in England and Wales, and in Singapore | Not stated (describes itself as one of the largest EMEA Klaviyo partners) |
| Team | Not stated | 120+ retention marketers |
| Klaviyo partner tier | Klaviyo Master Elite | One of the largest EMEA Klaviyo partners (its own description) |
| Channels | Email, SMS, WhatsApp, and direct mail | Email, SMS, WhatsApp, and owned channels, plus CRM strategy |
| Pricing | One flat monthly fee, amount not published | Not published |
| Minimum | Not published | Not published |
| Guarantee | Not stated | Not stated |
| Track record | 300+ ecommerce brands | 150+ global clients, $165M in trackable sales claimed |
| Notable clients | Outerknown, Waterdrop, Laura Geller, Bliss, Duradry, Hey Bud | AG1, Osprey, VED, Surreal, Frive |
| Clutch | Clutch profile with no reviews yet | No Clutch profile found |
How they work
Magnet Monster charges one flat monthly fee that covers unlimited emails, SMS, WhatsApp, and direct mail. It is a Klaviyo Master Elite agency and says it has worked with 300+ ecommerce brands over about 7 years.
Underground Ecom has 120+ retention marketers and sells a full program: CRM audit and roadmap, retention strategy, creative and execution, automations, and SMS and WhatsApp management. It focuses on fast-growth DTC brands.
Pricing
Magnet Monster: One flat monthly fee, amount not published. Underground Ecom: Not published.
Neither Magnet Monster nor Underground Ecom publishes prices, so you need a quote from each on the same scope. Prices change, so confirm on a call before you decide.
Klaviyo partner tier and channels
Magnet Monster lists its Klaviyo status as Master Elite. Underground Ecom lists its Klaviyo status as One of the largest EMEA Klaviyo partners (its own description).
Magnet Monster covers email, SMS, WhatsApp, and direct mail. Underground Ecom covers email, SMS, WhatsApp, and owned channels, plus CRM strategy.
What reviewers say
Magnet Monster: Clutch profile with no reviews yet.
Underground Ecom: no Clutch profile found.
Read the full reviews: Magnet Monster on Clutch
Who should choose which
Choose Magnet Monster if
- You want email, SMS, WhatsApp, and direct mail under one flat fee.
- You are a UK brand and want an agency registered there.
- You want a Klaviyo Master Elite partner.
Choose Underground Ecom if
- You are a large or fast-scaling brand and want a 100+ person retention team.
- You want CRM audits and strategy, not just email execution.
- You sell mainly in Europe and want an EMEA-focused partner.
A third option: Huge Win Media
Huge Win Media is about a dozen people working only in Klaviyo. Each client keeps the same marketers, writers, and designers every month. Week 1 is a full audit of every flow, campaign, and segment. Week 2 rebuilds the highest-impact flows. Week 3 starts the campaign calendar. After that it runs on weekly syncs, monthly reporting, and a quarterly A/B testing roadmap.
Huge Win Media is best for established brands with no one in-house on email, ready to put $1,000 to $2,000 a month into it. Pricing: From $1,000/mo. Campaigns $100 to $200 per email by format. Flows quoted after a free audit, from $3,500. Lower rate if your team runs strategy or account management. It works only in Klaviyo, is not a Master Elite partner, and has no Clutch profile yet.
| Compared on | Magnet Monster | Underground Ecom | Huge Win Media |
|---|---|---|---|
| Best for | UK and global DTC brands that want unlimited multichannel sends on one fee | Fast-growth and enterprise DTC brands that want full CRM strategy from a large team | Established brands with no one in-house on email, ready to put $1,000 to $2,000 a month into it |
| Pricing | One flat monthly fee, amount not published | Not published | From $1,000/mo. Campaigns $100 to $200 per email by format. Flows quoted after a free audit, from $3,500. Lower rate if your team runs strategy or account management |
| Minimum | Not published | Not published | No minimum term on monthly plans. One-off flow builds have no ongoing commitment |
| Klaviyo tier | Klaviyo Master Elite | One of the largest EMEA Klaviyo partners (its own description) | Klaviyo Partner (not Master Elite) |
| Clutch | Clutch profile with no reviews yet | No Clutch profile found | No Clutch profile yet |
More comparisons
- Huge Win Media vs Magnet Monster
- Huge Win Media vs Underground Ecom
- Magnet Monster alternatives
- Underground Ecom alternatives
Questions
Is Magnet Monster better than Underground Ecom?
Neither is better for everyone. Magnet Monster is best for UK and global DTC brands that want unlimited multichannel sends on one fee. Underground Ecom is best for fast-growth and enterprise DTC brands that want full CRM strategy from a large team.
Which is cheaper, Magnet Monster or Underground Ecom?
Neither Magnet Monster nor Underground Ecom publishes prices, so you need a quote from each on the same scope. Magnet Monster: One flat monthly fee, amount not published. Underground Ecom: Not published. Checked October 2026.
Is there an alternative to Magnet Monster and Underground Ecom?
Yes. Huge Win Media is best for established brands with no one in-house on email, ready to put $1,000 to $2,000 a month into it, with monthly plans from $1,000 and flow builds from $3,500. It works only in Klaviyo and is not a Master Elite partner.
More agency comparisons and buying guides
Sources and how this page was checked
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: magnetmonster.com homepage · undergroundecom.com homepage · Huge Win Media pricing · About Huge Win Media · Case studies