Most subscription brands lose customers in 2 places: the cancel screen and the renewal that fails. Both live inside the subscription app, which is why the agency running your Klaviyo should be working in the app too. Every agency below shows real subscription work in public.
The shortlist at a glance
| Agency | Good fit for | Subscription apps | Based |
|---|---|---|---|
| Email Kong | Shopify subscription brands, especially on Loop | Loop | London |
| YOCTO | Larger subscription brands, $5M-$150M a year | Loop, Recharge, Skio | Nicosia, Cyprus |
| Sticky Digital | Recharge brands that want retention only | Recharge | North America |
| Retentiononly | Loop brands that only want churn work | Loop | Dubai |
| Magnet Monster | Email, SMS, WhatsApp and direct mail from a small team | Not named | Sale (UK) and Singapore |
| Swanky | UK brands on Shopify Plus that need a build too | Recharge | Exeter, Adelaide, Montpellier |
| First Pier | US brands that want a Shopify build and subscription setup | Recharge | Portland, Maine |
1. Email Kong
We built Email Kong around subscription brands. We run Klaviyo and the subscription app as one programme, so the cancel flow, the save offers, failed payment recovery, winback and every email and SMS around them are handled by the same team. We also move brands onto Loop from other apps and rebuild the Klaviyo flows that ran on the old app's events.
We're a Klaviyo Master Platinum Partner, ranked in the top 2.5% of partners worldwide, a member of Klaviyo's Partner Advisory Council and a Loop agency partner. Over 5 years we've worked with 140+ DTC brands and driven $59M+ in revenue attributed to Klaviyo, and we're rated 4.5 on Trustpilot.
The results are published with the brand names on them. Kaori, a women's health subscription brand, went from 3.3% to 19% of store revenue coming from Klaviyo. Penrose Skin went from 15.2% to 23.2% while the store itself more than tripled. At KittySpout, 46% of revenue is attributed to Klaviyo. Other subscription clients include HolySwish and Ritual Labs.
Your first flow goes live within 72 hours of us getting access, and every month runs on the EK Retention Cycle: fix what's leaking, test it, keep what wins. Retainers start from $5,000 a month.
Good fit if: you sell subscriptions on Shopify and want one team that owns Klaviyo and your subscription app.
2. YOCTO
YOCTO is a Klaviyo Elite partner and a Premier partner in Recharge's directory, working every day in Loop, Recharge and Skio. It focuses on subscription-first brands in supplements, wellness and beauty doing roughly $5M to $150M a year, and covers US, UK and EU time zones. Clients include Healf, Gratsi, Evereden, MiraCare and ColonBroom.
Good fit if: you're a larger subscription brand and want a team that knows all 3 big subscription apps.
3. Sticky Digital
Sticky Digital is a Klaviyo Master Platinum partner focused only on retention. Recharge's partner directory lists its expertise in the Recharge API, flows, bundles, loyalty and the customer portal theme. Clients include U Beauty, MUD\WTR, Nest New York, Cay Skin and Ascent Nutrition.
Good fit if: you run Recharge and want a retention-only agency.
4. Retentiononly
Retentiononly is a Dubai-based Loop partner that does churn work and nothing else. Its Loop profile lists 13 Klaviyo subscription flows and 9 optimisations inside Loop, across onboarding, cancellation, failed payments and winback. Clients include Skinesa, Seranova, Manly, SHEKO, Stars + Honey and Waterdoctor.
Good fit if: you're on Loop and only want churn and failed payments fixed.
5. Magnet Monster
Magnet Monster is a small Klaviyo Elite team with offices in Sale, Cheshire and Singapore, running email, SMS, WhatsApp and direct mail. Its site lists a subscription management service and a free subscription audit, and its Wild case study covers a full subscription flow build. Clients include Waterdrop, Laura Geller, Wild and Outerknown.
Good fit if: you want several channels run by one small team.
6. Swanky
Swanky is a full-service Shopify Plus agency and Klaviyo Platinum partner with offices in Exeter, Adelaide and Montpellier. It lists subscription solutions as a service, and its case studies include a move to Shopify and Recharge for FutureYou Cambridge. Clients include HelloFresh, YuMOVE, Wilkinson Sword and Union Hand-Roasted Coffee.
Good fit if: you're a UK brand that needs a replatform and a subscription build together.
7. First Pier
First Pier is a Shopify agency in Portland, Maine, and a Klaviyo Silver Master partner. Its case studies include a subscription strategy for Wyman's and a site rebuild with a subscription platform for Tandem Coffee, and it lists Recharge as a technology partner.
Good fit if: you're a US brand that wants the store build and the subscription setup from the same team.
How to choose
Ask every agency these before you sign:
- Will you work inside our subscription app, or only in Klaviyo?
- Can you show a cancel flow you built, with saves per cancel reason?
- How do you handle failed payments across retries, email and SMS?
- Can you show results from subscription brands, with dates?
- What's the minimum term and notice period?
For what a full programme should cover, read our guide to a subscription retention agency. For fees, see our Klaviyo agency pricing guide, and for Loop specifically, how we work as a Loop Subscriptions agency.
Get a free Klaviyo audit
If you run a subscription brand, send us access and we'll go through your flows, cancel flow and failed payment recovery. You get a recorded walkthrough and a fix plan within 48 hours, reviewed by our founder. Get your free Klaviyo audit.
Sources
- Email Kong: Klaviyo directory, Loop directory
- YOCTO: Klaviyo directory, Recharge directory, website
- Sticky Digital: Klaviyo directory, Recharge directory
- Retentiononly: Loop directory, website
- Magnet Monster: Klaviyo directory, website
- Swanky: Klaviyo directory, website
- First Pier: Klaviyo directory, website
