“Integrates with WordPress” is the most abused phrase in this category. For half these tools it means a real plugin that syncs WooCommerce orders, fires automations on on-site behavior and sends from your own domain. For the other half it means an embeddable signup form and a Zapier task for anything harder. We installed the plugins, traced what actually syncs back to WordPress, and ranked the six on connection depth — not on whether a plugin merely exists.
Same five criteria, reweighted for a WordPress stack. Native plugin depth leads — an official, maintained plugin that does more than embed a form. Then WooCommerce order and event sync, because that’s where a thin integration gets exposed. Then open API and webhooks for the custom cases, automation, and value. A tool that needs Zapier to move an order is marked down on principle. See the full rubric →
Native WordPress plugin depth30%
WooCommerce order / event sync25%
Open API & webhooks15%
Automation15%
Value15%
01
RANK
★ Editor’s Choice
Brevo
Deepest native plugin
Brevo’s official plugin is the most complete native integration in the category: it captures forms, runs automations, and — through the dedicated WooCommerce plugin — syncs customers, orders and purchase history, so abandoned-cart and post-purchase flows fire on real store events. It can even send your site’s transactional email over SMTP from the same account. No Zapier in the loop, and send-based pricing keeps it cheap. This is what a native WordPress integration is supposed to look like.
MailerLite keeps the WordPress and email layers cleanly separated, with an official plugin and a WooCommerce integration that syncs order data, tracks revenue per campaign and adds checkout opt-ins. It does less hand-holding inside wp-admin than Brevo, but everything load-bearing — orders, segments, revenue attribution — flows natively. The value pick that doesn’t cut the integration corners.
The free Mailchimp for WooCommerce plugin sends store and customer data to Mailchimp and covers most use cases without paying for premium, and the broader integration directory is the largest here. The trade-off is the usual Mailchimp one — cost climbs steeply with contacts, and on-site behavioral depth trails Brevo and Klaviyo. Great starting point, watch the bill as the list grows.
For a serious WooCommerce store, Klaviyo’s plugin delivers the deepest behavioral sync on this list — real-time events, predictive analytics, granular segmentation off store data. It’s heavier and pricier than the field, and overkill for a content site with a newsletter. Buy it when the WordPress site is fundamentally a shop, not a blog.
ActiveCampaign’s plugin adds its forms and site-tracking script to WordPress, and the automation engine behind it is the strongest in this comparison. Deep WooCommerce order data needs its add-on rather than coming free in the core plugin, so the out-of-box WordPress sync is a notch shallower than Brevo’s. Pick it when automation sophistication matters more than plug-and-play store sync.
Constant Contact has a WordPress plugin and a WooCommerce connector, but the integration is lighter than the field — on-site behavioral triggers and transactional sending aren’t really its game, and you’ll lean on bridges sooner. It’s fine for a simple list-build on a brochure site. For a store that needs orders and cart events flowing natively, it’s the wrong fit.
What counts as a real native WordPress integration, versus a Zapier bridge?
A native integration is an official, vendor-maintained plugin that reads and writes WordPress data directly — form submits, WooCommerce orders, on-site behavior — in real time. A Zapier bridge is a third-party relay that polls or webhooks data between the two systems; it adds latency, breaks when a field changes, and meters every task. If your store’s order and cart events only reach the email tool through Zapier, you don’t have a native integration — you have a dependency.
Do I need WooCommerce for these rankings to matter?
If your site is content-first with a newsletter, plugin depth and clean form capture matter more than store sync, and any of the top five serve you well. If you sell through WooCommerce, the WooCommerce sync row is the whole decision — abandoned-cart and post-purchase revenue lives or dies on whether orders flow natively. That’s where Brevo, MailerLite, Mailchimp and Klaviyo separate from the lighter tools.
Which has the deepest WordPress plugin?
Brevo. Its official plugin handles forms and automation, the companion WooCommerce plugin syncs customers, orders and purchase history for event-based flows, and it can send your transactional email over SMTP from the same account — all without a bridge. MailerLite and Klaviyo are close on WooCommerce specifically, but Brevo’s plugin does the widest job inside WordPress itself.
Is the free Mailchimp for WooCommerce plugin enough?
For many stores, yes. It syncs store and customer data, supports automations and product retargeting, and the free version covers most needs, which makes premium genuinely optional rather than required. The reason it isn’t our top pick is cost trajectory and behavioral depth — Mailchimp gets expensive as contacts grow, and its on-site behavioral triggering trails Brevo and Klaviyo. Start here; re-evaluate when the list scales.