Formstack Online Forms

How well this listing is tuned to rank in WordPress.org search, on the factors an owner controls. Not popularity, optimization.

Directory rank vs rivals

wp.org popularity rank over time · higher is better · when a rival's line climbs above yours, they've overtaken you

How often this plugin actually ships. A steady rhythm is the maintenance signal a single "last updated" date can't show.

Share of active installs on each version of this plugin · 100% run the current release. Green is the current release; a big slice on older versions is a user base that has stopped updating.

Refined from the date this plugin crossed into its current band.

No paid tier is visible, so we don't put a figure on revenue or sale value: that would be guessing. The install base is a real asset to an acquirer, just not one public data lets us price. A small install base leaves thin data to model from.

1. ★★★★★ therealmoptop

   4.6y ago

   For a system that asks a lot of money for their service, you would think they would keep their features up to date. Nope. Can’t use this plugin, it just errors out. Can’t even use their embed javascript because you get a 403 server error.

   Read on wp.org ↗
2. ★★★★★ Joe Bloggs

   7.4y ago

   It seem like you guys are trying to do too many things, but nothing works properly. Signed up with Formstack, your Drupal extension doesn’t work, this WordPress extension doesn’t work either. It sends people to Formstack for confirmation instead of staying on the same page. This plugin hasn’t been updated for 2 years. .. wtf! The only thing I’m stuck with are iFrames. These suck, but at least work. Get a grip guys. You charge a lot of money for your service. This topic was modified 7 years, 3 months ago by Joe Bloggs.

   Read on wp.org ↗
3. ★★★★★ cbalth

   9.0y ago

   The previous plugin worked fine. This won’t authenticate and won’t allow me access to my forms. When saving new API and client ID it gives me this: Warning: Invalid argument supplied for foreach() in /home2/ogom/public_html/wp-content/plugins/formstack/plugin.php on line 288 Warning: Invalid argument supplied for foreach() in /home2/ogom/public_html/wp-content/plugins/formstack/plugin.php on line 288 Warning: Cannot modify header information – headers already sent by (output started at /home2/ogom/public_html/wp-content/plugins/formstack/plugin.php:288) in /home2/ogom/public_html/wp-includes/pluggable.php on line 1210

   Read on wp.org ↗
4. ★★★★★ Nethers Web Design

   10.1y ago

   Form cache can be refreshed immediately to pull in new forms rather than wait an unknown period for the new form to appear in your list. With 300+ forms the old plugin was quite slow, this one loads the forms from a cache, thus loads relatively immediately compared to the APIv1. Overall huge improvement. I would have given it 4/5 stars because the forms aren’t ordered, but Michael who made the plugin is amazing and provided a workaround via the support thread. Quite easy fix with roughly 4 lines of code (not sure why they haven’t pushed the changes as 2.0.2). Formstack is a great product overall, integrating with major players. If I had to give a cost to formstack in general (not the plugin) higher than average cost would be the biggest drawback for most small businesses. Ignore the 1 star reviews, this plugin works just fine if you can handle 5 minutes of setup. This topic was modified 9 years, 3 months ago by Nethers Web Design. This topic was modified 9 years, 3 months ago by Nethers Web Design. This topic was modified 8 years, 8 months ago by Nethers Web Design. Reason: Plugin got better This topic was modified 8 years, 8 months ago by Nethers Web Design. Reason: Provided clarification This topic was modified 8 years, 8 months ago by Nethers Web Design. Reason: added details

   Read on wp.org ↗
5. ★★★★★ Anonymous

   10.4y ago

   From Formstack’s own website… “compatible with up to WordPress 4.0” It wants you to use Formstack’s API v1 which is now deprecated and discouraged BY FORMSTACK! Do not install this plugin!

   Read on wp.org ↗
6. ★★★★★ zwilson

   10.4y ago

   I’m not sure wrapping if this is just this version or all versions, but wrapping your site in an iframe doesn’t constitute as a functioning plugin. Doesn’t work on WP 4.5 as far as i’m concerned.

   Read on wp.org ↗
7. ★★★★★ TravisJamison

   12.7y ago

   It works like it’s supposed to. Makes it easy.

   Read on wp.org ↗
8. ★★★★★ douglaskarr

   13.6y ago

   There are some good form plugins but the advantage of having a plugin that integrates Forms into your WordPress instance while it can also be on landing pages, sites, mobile and other installations is a great advantage. The Formstack team has done an incredible job integrating third parties as well!

   Read on wp.org ↗

1 disclosed vulnerability on record for this plugin, 1 still affects the current version.

1. Medium · 5.3 Formstack Online Forms <= 2.0.2 - Missing Authorization ↗
   2025-12-05 CVE-2025-62738 Missing Authorization Affects <= 2.0.2 No patch available

Automated install-time checks, tested on PHP 7.2.16 · WP 5.3

Growth timeline

Install-tier crossings we have observed, and how long each tier took to outgrow

1. 2025-01-21 2K+ → 1K+ down after 1 days in tier
2. 2025-01-20 1K+ → 2K+ up after 21 days in tier
3. 2024-12-30 2K+ → 1K+ down

Competes with

The plugins that solve the same job, ranked by shared tags then reach, closest match first. The letter on the right is each plugin's health grade (A best, F worst).

• Lead Form Builder & Contact Form 8K+ installs · 4.0★ · 3 shared tags B
• Formsite | Embed online forms to collect orders, registrations, leads, and surveys 900+ installs · 4.0★ · 3 shared tags D
• WPForms – AI Form Builder for WordPress – Contact Forms, Payment Forms, Survey Form, Quiz & More 5M+ installs · 4.8★ · 2 shared tags A
• Fluent Forms – Customizable Contact Forms, Survey, Quiz, & Conversational Form Builder 700K+ installs · 4.8★ · 2 shared tags A
• Ninja Forms – The Contact Form Builder That Grows With You 600K+ installs · 4.4★ · 2 shared tags A
• SureForms – Contact Form Builder, AI Forms, Payment Form, Survey & Quiz 500K+ installs · 4.7★ · 2 shared tags A

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Formstack Online Forms: 1K+ active installs, 2.5★ (8 reviews). Plugin Pulse (WP Mayor), as of 2026-08-28. https://plugins.wpmayor.com/plugin/formstack