Ecommerce Benchmarks
Klaviyo vs Attentive vs Mailchimp: Real Adoption Across 74,777 Shopify Plus Stores
Across 74,777 Shopify Plus stores, Klaviyo is the default at 50 percent adoption, Mailchimp holds 9 percent that is mostly legacy brands that never migrated, and Attentive runs at 5.8 percent as an SMS specialist that sits alongside Klaviyo rather than replacing it. Plus brands tend to land on Klaviyo's roughly $1,700 per month plan. A Mailchimp Plus brand is likely under-monetizing its list, since Klaviyo migration commonly lifts email revenue 15 to 25 percent and pays back in 3 to 6 months.
We pulled real adoption data across 74,777 Shopify Plus stores for the three major email/SMS marketing platforms. Here's what the actual battle for email tooling looks like in 2026.
The numbers
| Platform | Stores using | Plus adoption |
|---|---|---|
| Klaviyo | 37,605 | 50.3% |
| Mailchimp | 6,823 | 9.1% |
| Attentive | 4,337 | 5.8% |
What this means
Klaviyo is the default at the Plus tier. 50 percent adoption across the global Plus index. Owala, Cernucci, ANINE BING, and most of the top US Plus brands use it. The pricing tier brands tend to land on is the "Plus" plan, starting around $1,700 per month. Material at $5M+ revenue, invisible at $30M+.
Mailchimp's 9% is mostly legacy. Brands that grew into Plus on Mailchimp and haven't migrated. The migration is often delayed because re-segmenting 2-5 years of customer data is a 4-8 week project. The cost-of-not-migrating accumulates as Mailchimp's segmentation and revenue-per-recipient analytics fall further behind Klaviyo's.
Attentive's 5.8% is SMS-only specialization. Attentive runs alongside Klaviyo at most brands rather than replacing it. The 5.8% adoption represents brands running aggressive SMS programs where Attentive's compliance + segmentation justify the additional spend ($1,500-$5,000+/month on top of Klaviyo).
Notable brand examples
- Klaviyo on Plus: Owala, Cernucci, ANINE BING, Astrid & Miyu, ZOX, Mad Rabbit Tattoo
- Mailchimp on Plus: SodaStream and smaller-volume Plus brands
- Attentive on Plus: Alo Yoga and high-SMS-volume brands
The CFO takeaway
If you're a Plus brand on Mailchimp, you're in the 9 percent minority, and likely under-monetizing your list. Klaviyo migration typically pays back in 3 to 6 months on email revenue uplift alone (15 to 25 percent lift is common on the same list). The hold-out is usually accounting or integration anxiety, not a real return-on-investment question.
Methodology
Pulled May 2026 from Storeleads. Adoption count equals the number of Shopify Plus stores running each platform as detected. Denominator equals 74,777 total Plus stores in the index. Some brands run multiple platforms (Klaviyo plus Attentive is the most common pairing), so adoption percent can sum above 100 percent across all tools tracked.
Frequently Asked Questions
which email or sms platform do most shopify plus brands actually use?
Klaviyo by 5x. 50.3 percent of Plus stores.
why is mailchimp so low on plus?
Plus brands graduate to Klaviyo once revenue justifies it. 9 percent is mostly legacy.
is attentive really only 5.8 percent? it feels bigger
Yes by count. Spend footprint is bigger because Attentive customers tend to be higher-SMS-volume.
Related
- Top 10 most-adopted apps on Plus
- What Plus brands spend on apps
- What is CAC?
- CAC calculator + benchmarks
Considering a Mailchimp-to-Klaviyo migration? Talk to a CFO on the unit-economics math first.