Best Email Template Design Software for Upstack Data

Klaviyo empowers businesses to create smarter digital relationships by transforming customer data into meaningful, impactful experiences. From email and SMS to web interactions and reviews, Klaviyo makes it easy for B2C brands to engage customers at every touchpoint. Trusted by over 157,000 businesses, Klaviyo helps drive faster, more efficient revenue growth. Klaviyo’s 350+ integrations making getting started easy for marketers. Some key features of the platform include predictive analytics, AI automation, optimized templates, A/B testing, and intuitive segmentation and email flows to ensure marketers are reaching their audience with the right message at the right time. The solution also supports integration with payment processing and point of sale (POS) software solutions, such as Magento, Shopify, and WooCommerce.

Email & SMS marketing so good, it's boring. Trusted by 150,000+ ecommerce brands, Omnisend automates your marketing across the whole customer journey — the right message, to the right audience, at the right time. Grow subscriber lists with landing pages and popups. Send campaigns from 250+ ready-made templates, or let Omnisend AI write the copy. Convert with pre-built automations for welcome, cart abandonment, browse abandonment, and birthdays. Integrates in one click with Shopify, BigCommerce, WooCommerce, Wix, and more. Omnisend reaches your audience across channels inside the same automation workflow: email, SMS, and web push, rather than three separate tools and three separate bills. Sync segments to Google and Facebook for retargeting. And with Omnisend MCP, your ChatGPT or Claude connects straight to your account, so performance checks, segment suggestions, and campaign drafts happen in one conversation. Same power, smaller bill. Merchants make an average of $79 for every $1 they spend.* Switching? We move every list, flow, and template in five days, free. Support is live chat and email, 24/7 in six languages, on every plan including free.