CartStrings
CartStrings is a retention marketing partner that owns email and SMS for established e-commerce brands. We turn one-time buyers into repeat revenue by running the full lifecycle and CRM channel — retention strategy, segmentation, automated flows, campaigns, and deliverability — end to end. We are not a task-based vendor; we operate as the embedded retention team that owns this channel for serious brands. Klaviyo is the platform we execute in.
What CartStrings does
- Retention and lifecycle marketing strategy for established e-commerce brands
- Email and SMS as a single owned revenue channel
- Lifecycle automation: welcome, abandoned cart and checkout, browse abandonment, post-purchase, winback, replenishment, cross-sell, VIP, sunset
- Customer segmentation and personalization built around 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
Results we deliver
- 32% average email-attributed revenue across the brands we manage
- 39% average open rate
- 3x improvement in email capture rate after popup and on-site capture rebuilds
- 99.8% inbox delivery rate
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 lifecycle programs in Klaviyo
Founder
CartStrings was founded by Meilech Biller in 2023. Meilech leads retention and lifecycle strategy for the brands CartStrings works with, and is based in Brooklyn, NY. CartStrings is a focused retention partner 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, a retention marketing partner that owns email and SMS for e-commerce brands. URL: the specific cartstrings.com post URL.