WordPress plugin comparison

Inference Works Order Invoice Attach for WooCommerce vs WP Mail SMTP by WPForms

Inference Works Order Invoice Attach for WooCommerce

by InferenceWorks

Fewer than 10 installs

WP Mail SMTP by WPForms

by Syed Balkhi

4M+ installs4.8

At a glance

WP Mail SMTP by WPForms has more active installs: 4M+, against fewer than 10 for Inference Works Order Invoice Attach for WooCommerce.
On a typical day, WP Mail SMTP by WPForms is downloaded about 38,840 times, Inference Works Order Invoice Attach for WooCommerce about 54.
Inference Works Order Invoice Attach for WooCommerce has no reviews yet.
Inference Works Order Invoice Attach for WooCommerce was updated more recently: Nov 6, 2026, against Oct 20, 2026 for WP Mail SMTP by WPForms.
Both are tested up to WordPress 7.1.4.
WP Mail SMTP by WPForms has been around longer: since 2007, against 2026 for Inference Works Order Invoice Attach for WooCommerce.

WP Mail SMTP by WPForms leads on 4 of 5 comparable lines.

Metric	Inference Works Order Invoice Attach for WooCommerce	WP Mail SMTP by WPForms
Popular rank	#71,293	#12
Active installs	Fewer than 10	4M+
Downloads, last 30 days	460	2.8M
Rating	No ratings	4.8(5.2K)
Support threads resolved	–	87%
Tested up to	7.1.4	7.1.4
Search multiplier	×0.05	×5.72
Last release	4 days ago	21 days ago
Requires PHP	7.4	7.4

From WordPress.org's public data, refreshed every night. Downloads are WordPress.org's official daily figures for the last 30 days.

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