Is WP WooCommerce Mailchimp compatible with HPOS and Checkout Blocks?
Plugin by Saint Systems · checked by Raz Technologies from v3.2.0 on · How we check
WP WooCommerce Mailchimp 3.2.0 declares compatibility with HPOS (High-Performance Order Storage) in its code. WP WooCommerce Mailchimp 3.2.0 does not declare Cart and Checkout Blocks compatibility, but its code uses the WooCommerce Blocks integration API. Its "WC tested up to" header says WooCommerce 10.6.2; the current WooCommerce release is 11.2.2.
| Check | Status | Evidence |
|---|---|---|
| HPOS (High-Performance Order Storage) | Yes— Declares HPOS compatible (woocommerce-mailchimp/includes/class-ss-wc-mailchimp-plugin.php). Evidence: declared. Verified 15 Oct 2026 (v3.2.0). | Compatibility declaration in woocommerce-mailchimp/includes/class-ss-wc-mailchimp-plugin.php Declared |
| Cart & Checkout Blocks | Not declared— No Cart/Checkout Blocks declaration in v3.2.0. Evidence: declared. Verified 15 Oct 2026 (v3.2.0). | No declaration; the code uses the Blocks integration API Declared |
| WooCommerce 11.2.2 | No— WC tested up to 10.6.2; current WooCommerce 11.2.2. Evidence: declared. Verified 15 Oct 2026 (v3.2.0). | "WC tested up to: 10.6.2" in the plugin header Declared |
Read from the plugin's zip on WordPress.org (v3.2.0), 15 Oct 2026. Declared = what the plugin's own code states; not a lab test. Re-checked within hours of every new version.
What this means for your store
- You can enable HPOS with WP WooCommerce Mailchimp active: the plugin's own code declares it supports the HPOS order tables. As with any change to order storage, try it on a staging copy first.
- If your store uses the block-based Cart and Checkout (the default for new WooCommerce stores), check that WP WooCommerce Mailchimp's features appear there on a staging copy. The classic checkout (the [woocommerce_checkout] shortcode) is the fallback.
- Its code does use the WooCommerce Blocks integration API (payment gateways typically register a block payment method this way), so it likely works in the block checkout even without a declaration. This is a hint from the code, not a declaration.
WP WooCommerce Mailchimp at a glance
| Version | 3.2.0 |
|---|---|
| Last updated | 7 Apr 2026 |
| Active installs | 5,000+ |
| Rating | 4.3/5 (35 ratings) |
| WC tested up to | 10.6.2 |
| WC requires at least | Not declared |
| Requires WordPress | 6.2 |
| Tested up to WordPress | 6.9.11 |
| Requires PHP | 7.4 |
Source: WordPress.org, .
Versions we have checked
| Version | HPOS | Checkout Blocks | WC tested up to | Checked |
|---|---|---|---|---|
| 3.2.0 | declared compatible | not declared | 10.6.2 | 15 Oct 2026 |
A new row is added each time a new version is released and scanned.
Similar WooCommerce plugins: HPOS and Checkout Blocks
| Plugin | Installs | HPOS | Checkout Blocks |
|---|---|---|---|
| Klaviyo | 100,000+ | Yes | Not declared |
| Kadence WooCommerce Email Designer | 90,000+ | Yes | Not declared |
| Mailonix | 20,000+ | Yes | Yes |
| Customer Email Verification | 8,000+ | Yes | Not declared |
FAQ
Is WP WooCommerce Mailchimp compatible with HPOS?
WP WooCommerce Mailchimp 3.2.0 declares compatibility with HPOS (High-Performance Order Storage) in its code. Checked 15 October 2026 from the plugin's code on WordPress.org.
Does WP WooCommerce Mailchimp work with the WooCommerce Checkout Blocks?
WP WooCommerce Mailchimp 3.2.0 does not declare Cart and Checkout Blocks compatibility, but its code uses the WooCommerce Blocks integration API. Checked 15 October 2026.
Is WP WooCommerce Mailchimp compatible with WooCommerce 11.2?
Its "WC tested up to" header says WooCommerce 10.6.2; the current WooCommerce release is 11.2.2. Checked 15 October 2026.