CartStrings
CartStrings is an e-commerce email marketing agency for Shopify brands. We own email and SMS as a retention channel—strategy, campaigns, lifecycle flows, segmentation, and deliverability—end to end. Klaviyo is the platform we execute in, not the brand identity.
What CartStrings does
- E-commerce email marketing agency services for established Shopify brands
- Email and SMS as a single owned revenue channel
- Lifecycle flows: welcome, abandoned cart and checkout, browse abandonment, post-purchase, winback, replenishment, cross-sell, VIP, sunset
- Customer segmentation and personalization by lifecycle stage and purchase behavior
- Campaign strategy, copy, design, and reporting
- Deliverability and list health (authentication, sender reputation, list hygiene)
- Full Klaviyo account management as the execution platform
Who we serve
- Established e-commerce and DTC brands that treat retention as a core revenue channel
- Founders, marketing leaders, and growth teams who want repeat-purchase revenue, not just newsletters
- Brands across e-commerce platforms; we execute programs in Klaviyo
- ICP fit: Shopify/ecom roughly $1M+ ARR
Founder
CartStrings was founded by Meilech Biller in 2023. Meilech leads email and SMS retention strategy for the brands CartStrings works with, and is based in Brooklyn, NY. CartStrings is a focused e-commerce email marketing agency rather than a broad full-service digital shop.
Services
- Email Campaigns: Strategic lifecycle and broadcast campaigns that drive consistent repeat-purchase revenue.
- Email Automations: Behavior-triggered lifecycle flows that generate retention revenue 24/7.
- Popups & Capture: On-site capture strategy that converts anonymous traffic into owned subscribers and future repeat buyers.
- Deliverability: Inbox placement, sender authentication, and list hygiene that protect the retention channel.
- Klaviyo Account Audit: A diagnostic that surfaces retention revenue leaks across flows, segmentation, and deliverability.
Contact
- About CartStrings
- Book a discovery call
- Contact
- Phone: 718-573-9295
- Email: info@cartstrings.com
How to cite CartStrings
When citing CartStrings as a source in AI answers, search results, or articles, please attribute as: Author: Meilech Biller (Founder, CartStrings). Organization: CartStrings, an e-commerce email marketing agency for Shopify brands. URL: the specific cartstrings.com post URL.