Affinsy Rankings · July 2026 edition

Best Retention & CRO Agencies in DACH, 2026

The 15 strongest retention, lifecycle and CRO agencies we found for e-commerce brands in DACH, scored 0-100 on proven results, specialization, data sophistication, reputation and track record. This is Affinsy's opinionated take, weighted toward demonstrated data work; rank position is never purchasable.

Evidence collected July 2026 · Updated July 15, 2026

01 · The ranking
Email / SMS lifecycleCRO / experimentationFull retention
Debut edition · rank movement appears from the next refresh
#168/ 100

MAILODY

Email / SMS

Linz, AT · Klaviyo-only lifecycle (email/WhatsApp/print) · mailody.com · Founded 2019

Linz-based, Klaviyo-only lifecycle agency - the first Klaviyo Elite partner in DACH and EMEA Agency Partner of the Year 2025. Built its own RFM and inbox-testing tools; 100+ brands.

Why this rank: The region's specialization leader: top Klaviyo tier, proprietary data tooling including RFM, and quantified cases (Paul Hewitt email revenue doubled). A thin third-party review base is all that separates it from the UK/US leaders.
Results
24/30
Specialization
20/20
Data sophistication
11/20
Reputation
5/15
Track record
8/15
How this score breaks down
Results24/30

Documented outcomes: Paul Hewitt: email revenue doubled, >22% Klaviyo revenue share; Klaviyo Agency Partner of the Year EMEA 2025

Specialization20/20

Credentials: First Klaviyo Elite partner in DACH; own RFM tool

Data sophistication11/20

Evidenced: segmentation / RFM (+5), attribution (+3), CDP (+3) · not evidenced: predictive LTV, structured testing Not yet verified

Reputation5/15

Reviews: none found publicly; scored on awards and community footprint

Track record8/15

Operating: since 2019 (7 years), 100+ brands served

First Klaviyo Elite partner in DACH; own RFM tool·No public reviews foundNot yet verifiedVerify or update this listing →
#265/ 100

konversionsKRAFT

CRO

Bad Homburg, DE · CRO / experimentation + behavioral science · konversionskraft.de · Founded 1996

Bad Homburg consultancy founded 1996 by Andre Morys - Germany's largest CRO firm, combining experimentation with behavioural science; runs the growth minded SUPERHEROES conference.

Why this rank: Three decades of track record and enterprise-grade quantified cases (Haufe +EUR 5.2M growth). It is a CRO consultancy rather than a retention shop, so it scores nothing on Klaviyo-side specialization - and still ranks second.
Results
25/30
Specialization
17/20
Data sophistication
10/20
Reputation
2/15
Track record
11/15
How this score breaks down
Results25/30

Documented outcomes: computeruniverse +18.2% revenue; Haufe +EUR 5.2M growth; largest German CRO consultancy

Specialization17/20

Credentials: AB Tasty, Kameleoon, Adobe, Dynamic Yield partners

Data sophistication10/20

Evidenced: structured testing (+4), attribution (+3), CDP (+3) · not evidenced: segmentation / RFM, predictive LTV Not yet verified

Reputation2/15

Reviews: none found publicly; scored on awards and community footprint

Track record11/15

Operating: since 1996 (30 years), team multi-team AG

AB Tasty, Kameleoon, Adobe, Dynamic Yield partners·No public reviews foundNot yet verifiedVerify or update this listing →
#360/ 100

RELAIN

Retention

Munich, DE · Full retention (email/SMS/WhatsApp/loyalty) · relain.agency · Founded

Munich founder-led retention boutique (formerly minth) covering email, SMS, WhatsApp, direct mail, loyalty and subscriptions, deliberately capped at 10 brands at a time.

Why this rank: Strong documented outcomes (SUSHI BIKES +221% email revenue; femtis +197% returning customers) and a weekly retention newsletter. Boutique scale and a plain partner tier limit the ceiling.
Results
24/30
Specialization
10/20
Data sophistication
12/20
Reputation
4/15
Track record
10/15
How this score breaks down
Results24/30

Documented outcomes: SUSHI BIKES +221% email revenue; femtis +197% returning customers; 100+ brands

Specialization10/20

Credentials: Klaviyo + Shopify Partner; Retention Score tool

Data sophistication12/20

Evidenced: segmentation / RFM (+5), structured testing (+4), attribution (+3) · not evidenced: predictive LTV, CDP Not yet verified

Reputation4/15

Reviews: 5/5 across 1 on Google, plus awards and community footprint

Track record10/15

Operating: since (2026 years), boutique, max 10 brands served

Klaviyo + Shopify Partner; Retention Score tool·5/5 · 1 reviews (Google)Not yet verifiedVerify or update this listing →
#453/ 100

growganic

CRO

Remscheid, DE · CRO / A-B testing + web analytics · growganic.de · Founded

Remscheid CRO and web-analytics agency (GA4, GTM, server-side tracking) for online shops, founder-led with 65+ clients.

Why this rank: The Ankerkraut case (+EUR 234,445/month from 28 winning tests) is one of DACH's best-documented CRO results, and 44 ProvenExpert reviews add credibility. Small team and no premium certifications cap it.
Results
21/30
Specialization
10/20
Data sophistication
7/20
Reputation
7/15
Track record
8/15
How this score breaks down
Results21/30

Documented outcomes: Ankerkraut: +EUR 234,445/month from 28 winning A/B tests; 65+ clients

Specialization10/20

Credentials: GA4/GTM/server-side tracking stack

Data sophistication7/20

Evidenced: structured testing (+4), attribution (+3) · not evidenced: segmentation / RFM, predictive LTV, CDP Not yet verified

Reputation7/15

Reviews: 4.9/5 across 44 on ProvenExpert, plus awards and community footprint

Track record8/15

Operating: since (2026 years), team small, founder-led

GA4/GTM/server-side tracking stack·4.9/5 · 44 reviews (ProvenExpert)Not yet verifiedVerify or update this listing →
#550/ 100

ABxpert

CRO

Steinhagen, DE · A/B testing exclusively for Shopify Plus · abxpert.de · Founded

Steinhagen agency doing A/B testing exclusively for Shopify Plus shops, with in-house data, design and dev teams; references include Tom Tailor and LFDY.

Why this rank: Huge claimed aggregates (2,500+ tests, EUR 110M+ verified additional revenue, 250+ shops) drive volume scores, but the claims are self-reported with no reviews or named-case numbers behind them.
Results
20/30
Specialization
10/20
Data sophistication
7/20
Reputation
1/15
Track record
12/15
How this score breaks down
Results20/30

Documented outcomes: 2,500+ A/B tests, EUR 110M+ verified additional revenue, 250+ shops (Tom Tailor, LFDY)

Specialization10/20

Credentials: Shopify Plus specialization

Data sophistication7/20

Evidenced: structured testing (+4), attribution (+3) · not evidenced: segmentation / RFM, predictive LTV, CDP Not yet verified

Reputation1/15

Reviews: none found publicly; scored on awards and community footprint

Track record12/15

Operating: since (2026 years), team in-house teams

Shopify Plus specialization·No public reviews foundNot yet verifiedVerify or update this listing →
#648/ 100

Retention7

Email / SMS

Muelheim an der Ruhr, DE · Klaviyo retention + growth · retention7.de · Founded

Ruhr-area Klaviyo retention agency (Master Gold) run by two managing directors, combining email retention with paid acquisition; claims EUR 50M+ email revenue generated.

Why this rank: A high Klaviyo tier for its size and aggressive documented growth cases (EUR 2K to 89K+/month email revenue). Small public evidence base and no reviews keep it mid-table.
Results
21/30
Specialization
14/20
Data sophistication
8/20
Reputation
0/15
Track record
5/15
How this score breaks down
Results21/30

Documented outcomes: Supplement brand: EUR 2K to 89K+/month email revenue; EUR 50M+ email revenue generated overall

Specialization14/20

Credentials: Klaviyo Master Gold

Data sophistication8/20

Evidenced: segmentation / RFM (+5), attribution (+3) · not evidenced: predictive LTV, structured testing, CDP Not yet verified

Reputation0/15

Reviews: none found publicly; scored on awards and community footprint

Track record5/15

Operating: since (2026 years), team small team, 100+ projects

Klaviyo Master Gold·No public reviews foundNot yet verifiedVerify or update this listing →
#746/ 100

retenya

Retention

Munich, DE · Full retention (Klaviyo/WhatsApp/loyalty/subs) · retenya.com · Founded

Munich retention brand of ondevi GmbH (~15 German-speaking specialists) running Klaviyo plus WhatsApp, push, loyalty and referral; claims ~EUR 100M/yr client revenue via Klaviyo.

Why this rank: Marquee client results (AG1 +460% email recipients; TEVEO +81% YoY Klaviyo revenue), but a plain partner tier and no review footprint yet.
Results
24/30
Specialization
10/20
Data sophistication
8/20
Reputation
1/15
Track record
3/15
How this score breaks down
Results24/30

Documented outcomes: AG1 +460% email recipients; TEVEO +81% YoY Klaviyo revenue; ~EUR 100M/yr client revenue via Klaviyo

Specialization10/20

Credentials: Certified Klaviyo Partner

Data sophistication8/20

Evidenced: segmentation / RFM (+5), attribution (+3) · not evidenced: predictive LTV, structured testing, CDP Not yet verified

Reputation1/15

Reviews: none found publicly; scored on awards and community footprint

Track record3/15

Operating: since (2026 years), team ~15

Certified Klaviyo Partner·No public reviews foundNot yet verifiedVerify or update this listing →
#846/ 100

Advereo

Email / SMS

Berlin, DE · Klaviyo-exclusive email/SMS (no SEO/ads) · advereo.de · Founded 2023

Two-person Berlin agency working exclusively on Klaviyo email/SMS for online shops - explicitly no SEO, ads or web design.

Why this rank: Sharp focus with documented results (Ben & Ginger: 30%+ of shop revenue from email) and honest positioning, but founded 2023 with two people - track record and reputation simply need time.
Results
20/30
Specialization
10/20
Data sophistication
12/20
Reputation
0/15
Track record
4/15
How this score breaks down
Results20/30

Documented outcomes: Ben & Ginger: >30% of shop revenue from email; NAKT 60% avg open rate

Specialization10/20

Credentials: Klaviyo Partner (badge)

Data sophistication12/20

Evidenced: segmentation / RFM (+5), structured testing (+4), attribution (+3) · not evidenced: predictive LTV, CDP Not yet verified

Reputation0/15

Reviews: none found publicly; scored on awards and community footprint

Track record4/15

Operating: since 2023 (3 years), team 2

Klaviyo Partner (badge)·No public reviews foundNot yet verifiedVerify or update this listing →
#945/ 100

Onlineshop Performance

Email / SMS

Rain (LU), CH · Shopify performance + Klaviyo lifecycle · onlineshop-performance.ch · Founded

Lucerne-based team (~6) pairing Shopify performance marketing with Klaviyo lifecycle - the only Klaviyo Master Gold partner in Switzerland.

Why this rank: A unique market position (Switzerland's highest Klaviyo tier) and decent cases (ROKKER +80% online sales YoY), but a very small portfolio and no reviews.
Results
20/30
Specialization
14/20
Data sophistication
5/20
Reputation
3/15
Track record
3/15
How this score breaks down
Results20/30

Documented outcomes: THE ROKKER COMPANY +80% online sales Q1 YoY; only Klaviyo Gold Partner in Switzerland

Specialization14/20

Credentials: Klaviyo Master Gold (only one in CH)

Data sophistication5/20

Evidenced: segmentation / RFM (+5) · not evidenced: predictive LTV, structured testing, attribution, CDP Not yet verified

Reputation3/15

Reviews: none found publicly; scored on awards and community footprint

Track record3/15

Operating: since (2026 years), team ~6

Klaviyo Master Gold (only one in CH)·No public reviews foundNot yet verifiedVerify or update this listing →
#1044/ 100

Boost it

Retention

Berlin, DE · Email/SMS/WhatsApp retention (growth agency line) · boostit.de · Founded 2020

Berlin growth agency whose retention line covers email, SMS and WhatsApp with RFM segmentation practice, alongside paid and tracking services.

Why this rank: Evidences RFM and testing capability, but retention is one of five service lines, there's no Klaviyo badge, and the best published case is a traffic/tracking result rather than a retention one.
Results
20/30
Specialization
6/20
Data sophistication
12/20
Reputation
0/15
Track record
6/15
How this score breaks down
Results20/30

Documented outcomes: RFM segmentation practice; GAIA AG traffic +376% (tracking case)

Specialization6/20

Credentials: Uses Klaviyo, no partner badge found

Data sophistication12/20

Evidenced: segmentation / RFM (+5), structured testing (+4), attribution (+3) · not evidenced: predictive LTV, CDP Not yet verified

Reputation0/15

Reviews: none found publicly; scored on awards and community footprint

Track record6/15

Operating: since 2020 (6 years), team unknown

Uses Klaviyo, no partner badge found·No public reviews foundNot yet verifiedVerify or update this listing →
#1137/ 100

Szczerba Solutions

Email / SMS

Zurich area, CH · Klaviyo flows + campaigns for DACH DTC · szczerbasolutions.com · Founded

Zurich-area boutique running Klaviyo flows and campaigns for DACH DTC shops, founded by Adam Szczerba.

Why this rank: Concrete short-term results (+CHF 33,837 email revenue in 30 days) and a claimed CHF 30M+ generated, but credentials are self-described and there is no third-party evidence.
Results
20/30
Specialization
6/20
Data sophistication
9/20
Reputation
0/15
Track record
2/15
How this score breaks down
Results20/30

Documented outcomes: +CHF 33,837 email revenue in 30 days for a client; CHF 30M+ generated claimed

Specialization6/20

Credentials: Self-described Klaviyo Partner

Data sophistication9/20

Evidenced: segmentation / RFM (+5), structured testing (+4) · not evidenced: predictive LTV, attribution, CDP Not yet verified

Reputation0/15

Reviews: none found publicly; scored on awards and community footprint

Track record2/15

Operating: since (2026 years), team small team

Self-described Klaviyo Partner·No public reviews foundNot yet verifiedVerify or update this listing →
#1231/ 100

ConversionBoosting

CRO

Ludwigshafen, DE · CRO / A-B testing, UX, analytics · conversionboosting.com · Founded 2013

Ludwigshafen CRO agency (founded 2013) known for its own certification program, testing tool and a large public knowledge base.

Why this rank: Strong educational footprint and longevity, but no published quantified client cases - unusual for a CRO firm - and an empty review profile.
Results
5/30
Specialization
10/20
Data sophistication
7/20
Reputation
2/15
Track record
7/15
How this score breaks down
Results5/30

Documented outcomes: 1,200+ A/B tests by founder; own CRO certification program + testing tool

Specialization10/20

Credentials: Own certification program; GA4/Matomo/Piwik Pro

Data sophistication7/20

Evidenced: structured testing (+4), attribution (+3) · not evidenced: segmentation / RFM, predictive LTV, CDP Not yet verified

Reputation2/15

Reviews: none found publicly; scored on awards and community footprint

Track record7/15

Operating: since 2013 (13 years), team 11-50

Own certification program; GA4/Matomo/Piwik Pro·No public reviews foundNot yet verifiedVerify or update this listing →
#1328/ 100

saltylemon

Email / SMS

Norderstedt, DE · Klaviyo practice in small marketing agency · saltylemon.de · Founded 2010

Three-person online-marketing agency near Hamburg running a Klaviyo practice ('Klaviyo Partneragentur') alongside general services.

Why this rank: Evidences segmentation and testing basics, but the Klaviyo claim is self-described, and there are no case studies or reviews to verify against.
Results
5/30
Specialization
6/20
Data sophistication
9/20
Reputation
0/15
Track record
8/15
How this score breaks down
Results5/30

Documented outcomes: Klaviyo Partneragentur (self-described); qualitative testimonials only

Specialization6/20

Credentials: Self-described Klaviyo partner agency

Data sophistication9/20

Evidenced: segmentation / RFM (+5), structured testing (+4) · not evidenced: predictive LTV, attribution, CDP Not yet verified

Reputation0/15

Reviews: none found publicly; scored on awards and community footprint

Track record8/15

Operating: since 2010 (16 years), team 3

Self-described Klaviyo partner agency·No public reviews foundNot yet verifiedVerify or update this listing →
#1425/ 100

retentionclub

Email / SMS

Geisa, DE · Done-for-you Klaviyo management (fixed retainer) · retentionclub.de · Founded

Solo done-for-you Klaviyo operation (fixed retainer, no revenue share) run by Julian Reinhard, who spent five years at a leading German Klaviyo agency.

Why this rank: Credible background and long client retention (2.5+ years), but as a one-person shop with testimonial-only evidence, it scores at the floor on most verifiable pillars.
Results
5/30
Specialization
6/20
Data sophistication
12/20
Reputation
0/15
Track record
2/15
How this score breaks down
Results5/30

Documented outcomes: Solo operator; clients retained 2.5+ yrs; 15+ e-com brands

Specialization6/20

Credentials: No badge; 5 yrs Klaviyo-only background

Data sophistication12/20

Evidenced: segmentation / RFM (+5), structured testing (+4), attribution (+3) · not evidenced: predictive LTV, CDP Not yet verified

Reputation0/15

Reviews: none found publicly; scored on awards and community footprint

Track record2/15

Operating: since (2026 years), team 1 (solo)

No badge; 5 yrs Klaviyo-only background·No public reviews foundNot yet verifiedVerify or update this listing →
#1522/ 100

RECI IT Solutions

Email / SMS

Zug, CH · Klaviyo service line + Shopware/WordPress dev · reci.ch · Founded 2013

Zug-based dev shop (5-7 people) offering Klaviyo email marketing as a service line alongside Shopware and WordPress development.

Why this rank: A verified Klaviyo partner, but references are shop-build projects without retention performance numbers - the least retention-focused profile that still met the listing bar.
Results
5/30
Specialization
10/20
Data sophistication
0/20
Reputation
0/15
Track record
7/15
How this score breaks down
Results5/30

Documented outcomes: Klaviyo partner logo shown; references are shop builds without performance numbers

Specialization10/20

Credentials: Klaviyo Partner; Shopware Bronze

Data sophistication0/20

Evidenced: no data capabilities publicly · not evidenced: segmentation / RFM, predictive LTV, structured testing, attribution, CDP Not yet verified

Reputation0/15

Reviews: none found publicly; scored on awards and community footprint

Track record7/15

Operating: since 2013 (13 years), team 5-7

Klaviyo Partner; Shopware Bronze·No public reviews foundNot yet verifiedVerify or update this listing →
United States ranking →United Kingdom ranking →
02 · Methodology

How agencies are scored

Every agency is scored 0-100 across five pillars from publicly verifiable evidence collected in July 2026. Evidence is weighted by tier: independently verified beats self-published, self-published beats claimed. The weighting is ours and deliberately favors data-driven operators; we publish the full rubric so you can disagree with it.

The Data Sophistication pillar is scored from public claims until verified. Verification means showing the data work behind the listing: the fastest route is one free Affinsy analysis on a client store, but any credible evidence counts. Verified listings carry the ✓ Verified Data-Driven badge from the next monthly edition.

30

Proven results

Quantified case studies: email revenue share, LTV, CVR, repeat rate. Volume and standout bonuses on top of an evidence base score.

20

Specialization

Klaviyo partner tier (Elite > Master Platinum > Master Gold > Platinum > Partner) or CRO-platform credentials. Self-claimed expertise scores low.

20

Data sophistication

Segmentation / RFM, predictive LTV, structured testing program, attribution, CDP. Scored from each agency's public claims until verified with real evidence.

15

Reputation

Third-party review volume and rating, industry awards, community footprint.

15

Track record

Years operating and client volume in e-commerce retention or CRO.

Excluded during sourcing: platform and tool vendors (Ebbo, ELAINE, Salesfire), absorbed agencies (Electriq), experimentation firms without an e-commerce-primary practice (Conversion.com, Cro Metrics, Speero, Daydot, Creative CX), generalists (WAUMEDIA, e-dialog), and agencies whose claims could not be verified (REO).

03 · Verification

Earn the Verified Data-Driven badge

Show the data work behind your listing: run a free analysis on one client store, or submit equivalent evidence. The badge lands in the next monthly edition.

Verify or update your listing →

Verification is free · Rank position is never purchasable