02 · The ranking, scored
Email / SMS lifecycleCRO / experimentationFull retention
#1 konversionsKRAFT
CROBad Homburg, DE · CRO / experimentation + behavioral science · konversionskraft.de · Founded 1996
67/100
Rank #1 of 17 in DACH
konversionsKRAFT: 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 konversionsKRAFT ranks #1 in DACH: 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.
Score composition67 of 100 pts
Results
25/30
computeruniverse +18.2% revenueHaufe +EUR 5.2M growthlargest German CRO consultancysource ↗
Specialization
17/20
AB Tasty, Kameleoon, Adobe, Dynamic Yield partners
Data sophistication
12/20Not yet verified
Evidence found:✓structured testing+4✓attribution+2✓CDP+2✓cross-sell / basket analysis+4No public evidence:✕segmentation / RFM✕predictive LTV
Reputation
2/15
no reviews found publiclyawards and community footprint
Track record
11/15
since 1996 (30 years)team multi-team AG
#2 MAILODY
Email / SMSLinz, AT · Klaviyo-only lifecycle (email/WhatsApp/print) · mailody.com · Founded 2019
65/100
Rank #2 of 17 in DACH
MAILODY: 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 MAILODY ranks #2 in DACH: 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.
Score composition65 of 100 pts
Results
24/30
Paul Hewitt: email revenue doubled, >22% Klaviyo revenue shareKlaviyo Agency Partner of the Year EMEA 2025source ↗
Specialization
20/20
First Klaviyo Elite partner in DACHown RFM tool
Data sophistication
8/20Not yet verified
Evidence found:✓segmentation / RFM+4✓attribution+2✓CDP+2No public evidence:✕predictive LTV✕cross-sell / basket analysis✕structured testing
Reputation
5/15
no reviews found publiclyawards and community footprint
Track record
8/15
since 2019 (7 years)100+ brands served
#3 RELAIN
RetentionMunich, DE · Full retention (email/SMS/WhatsApp/loyalty) · relain.agency · Founded 2023
58/100
Rank #3 of 17 in DACH
RELAIN: Munich founder-led retention boutique (formerly minth) covering email, SMS, WhatsApp, direct mail, loyalty and subscriptions, deliberately capped at 10 brands at a time, now with a second base in Austin, TX.
Why RELAIN ranks #3 in DACH: 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.
Score composition58 of 100 pts
Results
24/30
SUSHI BIKES +221% email revenuefemtis +197% returning customers100+ brandssource ↗
Specialization
10/20
Klaviyo + Shopify PartnerRetention Score tool
Data sophistication
10/20Not yet verified
Evidence found:✓segmentation / RFM+4✓structured testing+4✓attribution+2No public evidence:✕predictive LTV✕cross-sell / basket analysis✕CDP
Reputation
4/15
5/5 across 1 on Googleawards and community footprint
Track record
10/15
since 2023 (3 years)boutique, max 10 brands served
#4 growganic
CRORemscheid, DE · CRO / A-B testing + web analytics · growganic.de · Founded 2022
52/100
Rank #4 of 17 in DACH
growganic: Remscheid CRO and web-analytics agency (GA4, GTM, server-side tracking) for online shops, founder-led with 65+ clients.
Why growganic ranks #4 in DACH: 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.
Score composition52 of 100 pts
Results
21/30
Ankerkraut: +EUR 234,445/month from 28 winning A/B tests65+ clientssource ↗
Specialization
10/20
GA4/GTM/server-side tracking stack
Data sophistication
6/20Not yet verified
Evidence found:✓structured testing+4✓attribution+2No public evidence:✕segmentation / RFM✕predictive LTV✕cross-sell / basket analysis✕CDP
Reputation
7/15
4.99/5 across 44 on ProvenExpertawards and community footprintsource ↗
Track record
8/15
since 2022 (4 years)team small, founder-led
#5 ABxpert
CROSteinhagen, DE · A/B testing exclusively for Shopify Plus · abxpert.de
49/100
Rank #5 of 17 in DACH
ABxpert: 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 ABxpert ranks #5 in DACH: 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.
Score composition49 of 100 pts
Results
20/30
2,500+ A/B tests, EUR 110M+ verified additional revenue, 250+ shops (Tom Tailor, LFDY)source ↗
Specialization
10/20
Shopify Plus specialization
Data sophistication
6/20Not yet verified
Evidence found:✓structured testing+4✓attribution+2No public evidence:✕segmentation / RFM✕predictive LTV✕cross-sell / basket analysis✕CDP
Reputation
1/15
no reviews found publiclyawards and community footprint
Track record
12/15
team in-house teams
#6 retenya
Retention▲ 1Munich, DE · Full retention (Klaviyo/WhatsApp/loyalty/subs) · retenya.com · Founded 2020
46/100
Rank #6 of 17 in DACH
retenya: 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 retenya ranks #6 in DACH: Marquee client results (AG1 +460% email recipients; TEVEO +81% YoY Klaviyo revenue), but a plain partner tier and no review footprint yet.
Score composition46 of 100 pts
Results
24/30
AG1 +460% email recipientsTEVEO +81% YoY Klaviyo revenue~EUR 100M/yr client revenue via Klaviyosource ↗
Specialization
12/20
Klaviyo Silver Master
Data sophistication
6/20Not yet verified
Evidence found:✓segmentation / RFM+4✓attribution+2No public evidence:✕predictive LTV✕cross-sell / basket analysis✕structured testing✕CDP
Reputation
1/15
no reviews found publiclyawards and community footprint
Track record
3/15
since 2020 (6 years)team ~15
#7 SiegerKonzept
Email / SMS▼ 1Ratingen, DE · Klaviyo retention + growth · siegerkonzept.com
46/100
Rank #7 of 17 in DACH
SiegerKonzept: Ratingen retention and growth partner, rebranded from Retention7 in 2026 and run by Joshua Klatt and Fred Schult; pairs strategic growth consulting with Klaviyo email retention and claims EUR 50M+ email revenue generated.
Why SiegerKonzept ranks #7 in DACH: 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.
Score composition46 of 100 pts
Results
21/30
Supplement brand: EUR 2K to 89K+/month email revenueEUR 50M+ email revenue generated overall
Specialization
14/20
Klaviyo Master Gold
Data sophistication
6/20Not yet verified
Evidence found:✓segmentation / RFM+4✓attribution+2No public evidence:✕predictive LTV✕cross-sell / basket analysis✕structured testing✕CDP
Reputation
0/15
no reviews found publiclyawards and community footprint
Track record
5/15
team small team, 100+ projects
#8 amail agency
Email / SMSNew entryGreven, DE · Klaviyo and Chatarmin WhatsApp retention · amail.agency
45/100
Rank #8 of 17 in DACH
amail agency: Klaviyo-only retention agency (amail GmbH) serving 7 to 8 figure DTC brands such as Sheko, Rosental Organics and Overshield, known for pairing Klaviyo with Chatarmin for WhatsApp lifecycle work.
Why amail agency ranks #8 in DACH: The strongest verified specialization in this tier, a Klaviyo Gold Master tier confirmed in Klaviyo's own directory alongside a clean ProvenExpert profile. What is missing is client evidence: the numbers on site are industry benchmarks rather than per-client results, and there are no case study pages.
Score composition45 of 100 pts
Results
12/30
Klaviyo Gold Master partner5.00 from 7 ProvenExpert reviewsclients include Sheko and Rosental Organics
Specialization
14/20
Klaviyo Gold Master partner (directory verified)
Data sophistication
6/20Not yet verified
Evidence found:✓segmentation / RFM+4✓CDP+2No public evidence:✕predictive LTV✕cross-sell / basket analysis✕structured testing✕attribution
Reputation
7/15
5/5 across 7 on ProvenExpertawards and community footprintsource ↗
Track record
6/15
team unknown
#9 Onlineshop Performance
Email / SMS▼ 1Rain (LU), CH · Shopify performance + Klaviyo lifecycle · onlineshop-performance.ch · Founded 2022
44/100
Rank #9 of 17 in DACH
Onlineshop Performance: Lucerne-based team (~6) pairing Shopify performance marketing with Klaviyo lifecycle - the only Klaviyo Master Gold partner in Switzerland.
Why Onlineshop Performance ranks #9 in DACH: 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.
Score composition44 of 100 pts
Results
20/30
THE ROKKER COMPANY +80% online sales Q1 YoYonly Klaviyo Gold Partner in Switzerlandsource ↗
Specialization
14/20
Klaviyo Master Gold (the only one in Switzerland)
Data sophistication
4/20Not yet verified
Evidence found:✓segmentation / RFM+4No public evidence:✕predictive LTV✕cross-sell / basket analysis✕structured testing✕attribution✕CDP
Reputation
3/15
no reviews found publiclyawards and community footprint
Track record
3/15
since 2022 (4 years)team ~6
#10 Advereo
Email / SMS▼ 1Berlin, DE · Klaviyo-exclusive email/SMS (no SEO/ads) · advereo.de · Founded 2023
44/100
Rank #10 of 17 in DACH
Advereo: Two-person Berlin agency working exclusively on Klaviyo email/SMS for online shops - explicitly no SEO, ads or web design.
Why Advereo ranks #10 in DACH: 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.
Score composition44 of 100 pts
Results
20/30
Ben & Ginger: >30% of shop revenue from emailNAKT 60% avg open ratesource ↗
Specialization
10/20
Klaviyo Partner (public badge)
Data sophistication
10/20Not yet verified
Evidence found:✓segmentation / RFM+4✓structured testing+4✓attribution+2No public evidence:✕predictive LTV✕cross-sell / basket analysis✕CDP
Reputation
0/15
no reviews found publiclyawards and community footprint
Track record
4/15
since 2023 (3 years)team 2
#11 Boost it
Retention▼ 1Berlin, DE · Email/SMS/WhatsApp retention (growth agency line) · boostit.de · Founded 2020
42/100
Rank #11 of 17 in DACH
Boost it: Berlin growth agency whose retention line covers email, SMS and WhatsApp with RFM segmentation practice, alongside paid and tracking services.
Why Boost it ranks #11 in DACH: 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.
Score composition42 of 100 pts
Results
20/30
RFM segmentation practiceGAIA AG traffic +376% (tracking case)
Specialization
6/20
Works in Klaviyo without a public partner badge
Data sophistication
10/20Not yet verified
Evidence found:✓segmentation / RFM+4✓structured testing+4✓attribution+2No public evidence:✕predictive LTV✕cross-sell / basket analysis✕CDP
Reputation
0/15
no reviews found publiclyawards and community footprint
Track record
6/15
since 2020 (6 years)team unknown
#12 Convertlab
CRONew entryHeilsbronn, DE · CRO / A-B testing for Shopify brands · convertlab.net · Founded 2023
39/100
Rank #12 of 17 in DACH
Convertlab: Bavarian CRO agency (Convertlab GmbH, incorporated January 2024, Shopify Partner since February 2023) running Bayesian A-B testing for Shopify brands under a five times ROI guarantee, with a CROcast podcast as its content channel.
Why Convertlab ranks #12 in DACH: Volume claims are unusually specific for this tier, 800 plus tests across 70 plus shops, and the Shopify Partner listing is verified. The blocker is its own site: the pages render only in the browser, so no case study, client result or data-practice claim on convertlab.net could be verified by fetch.
Score composition39 of 100 pts
Results
14/30
Shopify Partner listing claims 800+ A-B tests, 70+ shops and EUR 15M+ additional revenue5.0 from 2 directory reviews
Specialization
10/20
Shopify Partner (Plus services)TUEV-certified sales psychology
Data sophistication
6/20Not yet verified
Evidence found:✓structured testing+4✓attribution+2No public evidence:✕segmentation / RFM✕predictive LTV✕cross-sell / basket analysis✕CDP
Reputation
3/15
5/5 across 2 on Shopify Partner Directoryawards and community footprintsource ↗
Track record
6/15
since 2023 (3 years)team unknown
#13 Szczerba Solutions
Email / SMS▼ 2Zurich area, CH · Klaviyo flows + campaigns for DACH DTC · szczerbasolutions.com · Founded 2024
36/100
Rank #13 of 17 in DACH
Szczerba Solutions: Zurich-area boutique running Klaviyo flows and campaigns for DACH DTC shops, founded by Adam Szczerba.
Why Szczerba Solutions ranks #13 in DACH: 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.
Score composition36 of 100 pts
Results
20/30
+CHF 33,837 email revenue in 30 days for a clientCHF 30M+ generated claimed
Specialization
6/20
Self-described Klaviyo Partner
Data sophistication
8/20Not yet verified
Evidence found:✓segmentation / RFM+4✓structured testing+4No public evidence:✕predictive LTV✕cross-sell / basket analysis✕attribution✕CDP
Reputation
0/15
no reviews found publiclyawards and community footprint
Track record
2/15
since 2024 (2 years)team small team
#14 ConversionBoosting
CRO▼ 2Ludwigshafen, DE · CRO / A-B testing, UX, analytics · conversionboosting.com · Founded 2013
34/100
Rank #14 of 17 in DACH
ConversionBoosting: Ludwigshafen CRO agency (founded 2013) known for its own certification program, testing tool and a large public knowledge base.
Why ConversionBoosting ranks #14 in DACH: Strong educational footprint and longevity, but no published quantified client cases - unusual for a CRO firm - and an empty review profile.
Score composition34 of 100 pts
Results
5/30
1,200+ A/B tests by founderown CRO certification program + testing tool
Specialization
10/20
Own certification programGA4/Matomo/Piwik Pro
Data sophistication
10/20Not yet verified
Evidence found:✓structured testing+4✓attribution+2✓cross-sell / basket analysis+4No public evidence:✕segmentation / RFM✕predictive LTV✕CDP
Reputation
2/15
no reviews found publiclyawards and community footprint
Track record
7/15
since 2013 (13 years)team 11-50
#15 saltylemon
Email / SMS▼ 2Norderstedt, DE · Klaviyo practice in small marketing agency · saltylemon.de · Founded 2010
27/100
Rank #15 of 17 in DACH
saltylemon: Three-person online-marketing agency near Hamburg running a Klaviyo practice ('Klaviyo Partneragentur') alongside general services.
Why saltylemon ranks #15 in DACH: Evidences segmentation and testing basics, but the Klaviyo claim is self-described, and there are no case studies or reviews to verify against.
Score composition27 of 100 pts
Results
5/30
Klaviyo Partneragentur (self-described)qualitative testimonials only
Specialization
6/20
Self-described Klaviyo partner agency
Data sophistication
8/20Not yet verified
Evidence found:✓segmentation / RFM+4✓structured testing+4No public evidence:✕predictive LTV✕cross-sell / basket analysis✕attribution✕CDP
Reputation
0/15
no reviews found publiclyawards and community footprint
Track record
8/15
since 2010 (16 years)team 3
#16 retentionclub
Email / SMS▼ 2Geisa, DE · Done-for-you Klaviyo management (fixed retainer) · retentionclub.de
23/100
Rank #16 of 17 in DACH
retentionclub: 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 retentionclub ranks #16 in DACH: 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.
Score composition23 of 100 pts
Results
5/30
Solo operatorclients retained 2.5+ yrs15+ e-com brands
Specialization
6/20
No public partner badgefive years of Klaviyo-only work
Data sophistication
10/20Not yet verified
Evidence found:✓segmentation / RFM+4✓structured testing+4✓attribution+2No public evidence:✕predictive LTV✕cross-sell / basket analysis✕CDP
Reputation
0/15
no reviews found publiclyawards and community footprint
Track record
2/15
team 1 (solo)
#17 RECI IT Solutions
Email / SMS▼ 2Zug, CH · Klaviyo service line + Shopware/WordPress dev · reci.ch · Founded 2013
22/100
Rank #17 of 17 in DACH
RECI IT Solutions: Zug-based dev shop (5-7 people) offering Klaviyo email marketing as a service line alongside Shopware and WordPress development.
Why RECI IT Solutions ranks #17 in DACH: 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.
Score composition22 of 100 pts
Results
5/30
Klaviyo partner logo shownreferences are shop builds without performance numberssource ↗
Specialization
10/20
Klaviyo PartnerShopware Bronze
Data sophistication
0/20Not yet verified
No public evidence:✕segmentation / RFM✕predictive LTV✕cross-sell / basket analysis✕structured testing✕attribution✕CDP
Reputation
0/15
no reviews found publiclyawards and community footprint
Track record
7/15
since 2013 (13 years)team 5-7
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