YOCTO

Key points

• Category: Agencies: eCommerce retention
• Pricing: Paid
• Best for: Brands looking for an agency partner for Klaviyo-led retention and lifecycle work for DTC and eCommerce brands.
• Klaviyo Elite
• retention-side: subscriptions, dunning, churn, LTV

What YOCTO is

YOCTO is a Klaviyo Elite Master retention agency (a tier it says represents the top 0.0025% of Klaviyo's partner network) specializing narrowly in DTC subscription and health/wellness/CPG brands roughly in the $5-150M revenue range, mostly in the US and UK. Clients include Healf, BetterMe, Gratsi and Kilo.co, and the agency explicitly does not run paid ads or brand design, focusing solely on retention and lifecycle.

Its differentiator is combining Klaviyo email/SMS execution with subscription-specific mechanics: cancel-flow and dunning optimization, cohort LTV and payback analysis, and plan-structure work wired into subscription platforms like Recharge, Loop and Skio, treating the retention side of a subscription P&L as one connected system rather than separate email and ops workstreams.

It sits in the agencies: ecommerce retention part of an email stack - klaviyo-led retention, lifecycle and sms teams for dtc brands. In practice it is the right pick when your priority is: brands looking for an agency partner for klaviyo-led retention and lifecycle work for dtc and ecommerce brands.

What it does well

The capabilities teams rely on most are klaviyo elite, retention-side: subscriptions, dunning, churn, ltv. Taken together these cover the day-to-day work in this category, and they are the features worth testing during a trial rather than reading about.

YOCTO's deliberate specialization in subscription commerce and health/wellness/CPG verticals means it brings subscription-specific expertise (churn, dunning, cohort LTV) that generalist Klaviyo agencies typically do not have depth in.

In real use the strongest points people report are specialist team rather than a generalist marketing shop; hands-on execution: strategy, creative and campaign delivery.

Key features

• Klaviyo Elite
• retention-side: subscriptions, dunning, churn, LTV
• Specialist team rather than a generalist marketing shop
• Hands-on execution: strategy, creative and campaign delivery

Pricing tiers

YOCTO is a paid product. Custom retainers scoped to brand size within its $5M-$150M target range; pricing isn't published and is set through a discovery/audit process.

Pricing pages move often, so confirm the current figures with the vendor before you budget. The number worth modelling is not the licence fee on its own but the cost per delivered email once bounces, suppressed contacts and spam-foldered sends are taken out.

Ideal customer profile

• Best fit: Brands looking for an agency partner for Klaviyo-led retention and lifecycle work for DTC and eCommerce brands.
• Where it sits in the stack: Agencies: eCommerce retention - klaviyo-led retention, lifecycle and sms teams for dtc brands.
• Budget profile: Paid - suited to teams comfortable with this commercial model.
• Probably not for you if: retainer pricing - not a self-serve tool would block your team.

What it connects to

YOCTO is commonly wired into Klaviyo, Recharge, Loop, Skio, Shopify, Shopify Plus and Smartrr. Check that the specific objects and events you rely on are covered, not just that a logo appears on the integrations page - shallow connectors are a frequent source of rework.

Where it falls short

No tool in this space is complete on its own. With YOCTO the trade-offs to plan around are retainer pricing - not a self-serve tool; deliverability and sending reputation usually stay your responsibility. None of these are reasons to avoid it - they are the gaps another layer of your stack needs to fill.

The tight focus on subscription and health/wellness/CPG brands within a fairly narrow revenue band means it is a less natural fit for one-time-purchase retailers or brands well outside that size range.

A useful test before committing: send a real campaign through your intended setup, then check where it actually lands across Gmail, Outlook, Yahoo and your customers' corporate filters. Tooling that looks identical on a feature list often behaves very differently once reputation and authentication are involved.

The essentials

Category

Agencies: eCommerce retention

Pricing model

Paid

Vendor

yocto.agency

G2 rating

Not listed

Best for

Brands looking for an agency partner for Klaviyo-led retention and lifecycle work for DTC and eCommerce brands.

Works alongside Warmy

Yes - warm-up, placement, DMARC

How it fits a deliverability stack

Deliverability is decided by four things: the reputation of the sending domain and mailbox, the quality of the list, correct SPF, DKIM and DMARC authentication, and proof of where mail actually lands. YOCTO covers part of that picture. The mistake most teams make is buying four separate products for those four jobs and still having no single place that tells them whether the last campaign reached the inbox.

Warmy runs warm-up, inbox placement testing, email verification and DMARC monitoring as one platform, which is why YOCTO usually sits alongside it rather than against it: it keeps doing what it is good at, while reputation, placement and authentication are handled in one loop.

Deliverability is treated as one of several retention-health signals it monitors alongside churn and cohort metrics, rather than a standalone service line.