Duplicate Killer – Prevent Duplicate Form Submissions
by NIA · eCommerce
Also makes 1 other plugin · 1K+ installs across the portfolio →
Prevent duplicate form submissions by email, phone or text. Supports Contact Form 7, Elementor Forms, Forminator, WPForms Lite and more.
Try it live opens a temporary test site in your browser, which can take about 20 seconds to load. Plugins that rely on outside services or a full server may not work completely there.
Health
A 85/100
Few reviews
Active installs
1K+
≈1.9K estimated
Momentum
+220%
downloads vs prior 30d
Biggest opportunity: Swap “contact form 7”, “elementor forms” and “forminator” for “prevent fake orders”, “duplicate order” and “duplicate”. “contact form 7” isn't earning its slot: you're not in the first 24 results for its own search. “prevent fake orders” sits at #7 untagged, close enough for a declared tag to move it up. “elementor forms” isn't earning its slot: you're not in the first 24 results for its own search. “duplicate order” sits at #10 untagged, close enough for a declared tag to move it up. “forminator” isn't earning its slot: you're not in the first 24 results for its own search. “duplicate” sits at #11 untagged, close enough for a declared tag to move it up. All five slots are taken, so one has to go.
85 health vs 71 average across 9,743 eCommerce plugins
Install conversion
How it's measured →2.9%
of downloads still active
At least 1K of 34.2K lifetime downloads are still running, above its category: the median eCommerce plugin keeps 1.4%, across 5,140 plugins.
Downloads count every update, not just first installs, so older and more frequently released plugins read lower. Compare against other eCommerce plugins, not across the directory. wp.org reports active installs as the bottom of a band, so the real rate is this or higher.
This plugin shipped 35 releases in the last 12 months, and every existing install that updated counted as another download. wp.org publishes no split between first installs and updates, so we show the raw rate rather than guess at one.
Details
Recent review vibe
read from the latest 3 reviews to 2024-04-09Reviewers say it fixes duplicate form submissions right out of the box, including a Contact Form 7 double-email problem, and they're happy with the support.
Directory ranking optimization
How it's scored →How well this listing is tuned to rank in WordPress.org search, on the factors an owner controls. Not popularity, optimization.
Excellent listing optimization
Most to gain: Rating quality
Updated 6 days ago
Tested up to WordPress 7.1.4, the current branch or newer
5.0★ over 3 reviews, smoothed to 4.15★ and held back under 25 reviews
5 of 5 tags set · short description in place
To rank higher: Too few reviews to rank on quality — nudge happy users to leave one.
Get the full rank-higher report →Search visibility
How it's tracked →Directory searches this plugin turns up in, and which way each one is moving. WordPress.org publishes no history of search positions, so this starts the day we first tracked a keyword and never backfills.
44
Momentum
Holding steady
+0.3
Velocity
places per keyword, 28d
30%
Breadth
of keywords climbing, 28d
-0.0
Acceleration
recent half vs earlier
wp.org is where the directory puts the plugin for that search. On merit is where it would sit if results were ranked on rating, support and updates, without the install boost. The last column is how far the wp.org position moved, from our first reading in the last 90 days to the latest.
| Keyword | wp.org | On merit | wp.org move, 90 days |
|---|---|---|---|
| duplicate orders your tag | #4 | #15 | 0 |
| prevent duplicate orders | #2 | #13 | — |
| duplicate | #11 | #21 | 0 |
| prevent multiple submissions | #4 | #20 | up 1 |
| submissions | #12 | #20 | up 2 |
| prevent fake orders | #7 | #15 | 0 |
| prevent | #15 | #23 | down 4 |
| duplicate order | #10 | #21 | 0 |
| form submissions | #18 | #23 | up 1 |
| duplicate site | #9 | #21 | up 1 |
| wpforms lite | #24 | #21 | 0 |
| elementor duplicate | #11 | #22 | 0 |
| page duplicate | #14 | #23 | down 1 |
| duplicate page | #15 | #21 | down 1 |
| duplicate plugin | #16 | #23 | 0 |
| wp duplicate | #20 | #24 | up 2 |
| wordpress page duplicate | #21 | #24 | up 3 |
| contact form 7 your tag | Not in the top 24 | ||
| elementor forms your tag | Not in the top 24 | ||
| forminator your tag | Not in the top 24 | ||
| woocommerce your tag | Not in the top 24 | ||
52 searches this plugin appeared in over the last 90 days, 17 listed. 35 left out as unrelated or noise (years, numbers, stray words). 4 of its tags aren't in the top 24 for their own search.
What to do about it
- Swap “contact form 7”, “elementor forms” and “forminator” for “prevent fake orders”, “duplicate order” and “duplicate”. “contact form 7” isn't earning its slot: you're not in the first 24 results for its own search. “prevent fake orders” sits at #7 untagged, close enough for a declared tag to move it up. “elementor forms” isn't earning its slot: you're not in the first 24 results for its own search. “duplicate order” sits at #10 untagged, close enough for a declared tag to move it up. “forminator” isn't earning its slot: you're not in the first 24 results for its own search. “duplicate” sits at #11 untagged, close enough for a declared tag to move it up. All five slots are taken, so one has to go.
Daily downloads
Since 10 Oct 2022 · 1,483 days · wp.org + Plugin Pulse archive
30-day downloads
Rolling 30-day volume · peak 3.8K · peaks are release surges
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
Health trend
Composite health score, snapshotted daily
Update activity
How busy the existing users are, measured as downloads in the last 30 days for every 1,000 active sites. A spike means a new release everyone's pulling; a long, slow decline means an aging user base that updates less.
Release cadence
Actively maintainedHow often this plugin actually ships. A steady rhythm is the maintenance signal a single "last updated" date can't show.
35
releases in the last 12 months
6d ago
latest release · v1.7.7 · 25 Oct 2026
41
tagged releases on record
Recent releases
What its installed base runs
via wordpress.orgShare of active installs on each version of this plugin. Green is the current release; a big slice on older versions is a user base that has stopped updating.
Estimated active installs
The public count shows “1K+”. Our estimate pins where the real number sits.
Crossed into this band 2.1 years ago; a band this size takes about a year or more to cross, which places it about 90% of the way through.
Install history since 9 Oct 2022
Recent reviews
All reviews on wp.org ↗- ★★★★★ jeng222.6y ago
Plugin is straightforward and the support is really responsive and helpful.
Read on wp.org ↗ - ★★★★★ hambad2.7y ago
There seems to be an issue with CF7 where duplicate emails are sent out, and the forms render errors/loading spinners twice as well. I’ve done a good bit of research and looked everywhere, but had no luck finding a fix for this. This plugin resolved the issue straight away with no configuration needed! Thank you!
Read on wp.org ↗ - ★★★★★ peterlovescola3.1y ago
This solves my duplicate entries headache – works as intended. Thanks!
Read on wp.org ↗
Behavioral tests
via WP HiveAutomated install-time checks, tested on PHP 8.1.12 · WP 7.0
AI assistants
How it's measured →Whether ChatGPT and Claude name this plugin when asked the category question, and whether the readme gives them something to quote.
Not measured yet for this plugin’s topics. Its tracked searches are not among the measured topics. See the topics measured so far.
Readme readiness
7 of 8 pass · checked 29 Oct 2026Can an assistant quote this readme? Eight deterministic checks over the wp.org listing, no model involved.
- ! Says what it does Short description names no action; say what the plugin does for the site.
- ✓ Has a FAQ 14 questions in the FAQ.
- ✓ FAQ asks real questions 14 of 14 read like questions a user would type.
- ✓ Names who it is for Names its audience or use cases ("use it", "use this").
- ✓ Names what it works with Mentions WooCommerce, Elementor, Contact Form 7, WPForms and 1 more.
- ✓ Headings and lists 17 headings and 2 lists.
- ✓ Enough to quote 6,091 characters of description.
- ✓ Tags match the text 4 of 5 tags appear in the text; "duplicate-orders" does not.
Growth timeline
Install-tier crossings we have observed, and how long each tier took to outgrow
- 2024-09-30 900+ → 1K+ up after 38 days in tier
- 2024-08-23 800+ → 900+ up after 28 days in tier
- 2024-07-26 700+ → 800+ up after 29 days in tier
- 2024-06-27 600+ → 700+ up after 22 days in tier
- 2024-06-05 500+ → 600+ up after 34 days in tier
- 2024-05-02 400+ → 500+ up after 40 days in tier
- 2024-03-23 300+ → 400+ up after 65 days in tier
- 2024-01-18 200+ → 300+ up after 62 days in tier
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).
-
Google for WooCommerce 800K+ installs · 2.8★ · 1 shared tag C -
WooCommerce PayPal Payments 800K+ installs · 2.9★ · 1 shared tag B -
WooCommerce Stripe Payment Gateway 700K+ installs · 3.1★ · 1 shared tag B -
Database Addon for Contact Form 7 – CFDB7 600K+ installs · 5.0★ · 1 shared tag A -
WooCommerce Tax (formerly WooCommerce Shipping & Tax) 500K+ installs · 2.2★ · 1 shared tag B -
WooCommerce Legacy REST API 400K+ installs · 2.2★ · 1 shared tag C
Embed this report card
Drop a live Pulse card for Duplicate Killer – Prevent Duplicate Form Submissions into a readme, a review or a deck. It updates itself.
<iframe src="https://plugins.wpmayor.com/embed/duplicate-killer" width="480" height="300" style="border:0" loading="lazy" title="Duplicate Killer – Prevent Duplicate Form Submissions — Plugin Pulse"></iframe> Duplicate Killer – Prevent Duplicate Form Submissions: 1K+ active installs, 5.0★ (3 reviews). Plugin Pulse (WP Mayor), as of 2026-10-31. https://plugins.wpmayor.com/plugin/duplicate-killer
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