ZeroBounce Email Verification & Validation
by zerobounce · Email & Marketing
ZeroBounce validates emails on your WordPress site in real-time, blocking invalid and risky emails to improve deliverability and reduce bounce rates.
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 87/100
Few reviews
Active installs
900+
≈980 estimated
Momentum
-0%
downloads vs prior 30d
Biggest opportunity: Swap “email checker” and “email validation” for “risky” and “validation”. “email checker” isn't earning its slot: it only gets you to #20. “risky” sits at #8 untagged, close enough for a declared tag to move it up. “email validation” isn't earning its slot: it only gets you to #13. “validation” sits at #10 untagged, close enough for a declared tag to move it up. All five slots are taken, so one has to go.
87 health vs 66 average across 2,119 Email & Marketing plugins
Install conversion
How it's measured →6.1%
of downloads still active
At least 900 of 14.7K lifetime downloads are still running, above its category: the median Email & Marketing plugin keeps 0.9%, across 1,295 plugins.
Downloads count every update, not just first installs, so older and more frequently released plugins read lower. Compare against other Email & Marketing 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 3 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
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 66 days ago
Tested up to WordPress 6.9.11, the current branch or newer
4.8★ over 4 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.
35
Momentum
Losing ground
-0.6
Velocity
places per keyword, 28d
13%
Breadth
of keywords climbing, 28d
-0.2
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 |
|---|---|---|---|
| email verifier your tag | #4 | #5 | 0 |
| email tester your tag | #5 | #11 | 0 |
| email verification your tag | #7 | #12 | 0 |
| risky | #8 | #13 | down 1 |
| validation | #10 | #18 | 0 |
| email validation your tag | #13 | #18 | down 1 |
| reduce bounce rate | #5 | #14 | 0 |
| verification | #17 | #21 | down 1 |
| email checker your tag | #20 | #18 | down 1 |
| invalid | #20 | #19 | down 2 |
| disposable email | #19 | #14 | 0 |
| mailster | #21 | #17 | down 8 |
| tester | #14 | #19 | down 2 |
| email validator | #23 | #18 | down 3 |
| site validation | #15 | #21 | up 2 |
| email bounce | #18 | #22 | down 1 |
| email address validation | #20 | #22 | — |
| real time validation | #22 | #24 | 0 |
| website verification | #24 | #22 | down 5 |
55 searches this plugin appeared in over the last 90 days, 19 listed. 36 left out as unrelated or noise (years, numbers, stray words).
What to do about it
- Swap “email checker” and “email validation” for “risky” and “validation”. “email checker” isn't earning its slot: it only gets you to #20. “risky” sits at #8 untagged, close enough for a declared tag to move it up. “email validation” isn't earning its slot: it only gets you to #13. “validation” sits at #10 untagged, close enough for a declared tag to move it up. All five slots are taken, so one has to go.
- One page off on “email validation”. #13 puts you just past the first ten results, where almost all the clicks stop. The gap to close is small.
Daily downloads
Since 5 Oct 2022 · 1,488 days · wp.org + Plugin Pulse archive
30-day downloads
Rolling 30-day volume · peak 1.1K · 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
Rating trend
Star average over time · dips mark rough releases
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
Occasionally updatedHow often this plugin actually ships. A steady rhythm is the maintenance signal a single "last updated" date can't show.
3
releases in the last 12 months
2mo ago
latest release · v1.1.6 · 26 Aug 2026
4
tagged releases on record
Recent releases
What its installed base runs
via wordpress.orgShare of active installs on each version of this plugin · 98% run the current release. 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 “900+”. Our estimate pins where the real number sits.
Crossed into this band 4 months ago and the previous band took 19 months to cross, so the real count is still just under 1K.
Install history since 4 Oct 2022
Recent reviews
All reviews on wp.org ↗- ★★★★★ ttoaster3.0y ago
Been using this a while and it works pretty well; very useful for rejecting fake email addresses used by spammers/scammers, and also for validating real users/customer email addresses (where they sometimes mis-type their email address).So, why only 4 stars? Well simply because I asked about personal (local) whitelisting and blacklisting functionality when I spoke to their onboarding rep., and was promised it would be added soon; over 7 months later, still no sign of this. As a paying customer, I would like the developers to be more responsive and deliver features/functionality that your rep. promised…
Read on wp.org ↗ - ★★★★★ jasonblackdog3.4y ago
I have tried so many plugins, honeypot, captchas, IP blocking countries, user agents, etc. but this plugin is great! I was very skeptical at first but after several weeks of using this, we are now on a middle-tier paid plan. We use GravityForms so the plugin was VERY easy to configure and install. Super simple, bravo plugin devs!
Read on wp.org ↗ - ★★★★★ crgavrila3.7y ago
Exactly what I needed for my contact form 7. So simple to integrate with my contact form plugin.
Read on wp.org ↗ - ★★★★★ Mecanik13373.7y ago
I have tested this plugin on several of my personal and business websites, it’s awesome. No more spam and fake signups. Service pricing is also decent. Recommended.
Read on wp.org ↗
Security history
via Wordfence IntelligenceThe 1 disclosed vulnerability is patched in the current version (1.1.6). Sites still on an older version should update.
- Patched Medium · 5.5 ZeroBounce Email Verification & Validation <= 1.0.11 - Authenticated (Administrator+) Stored Cross-Site Scripting ↗2023-12-26 CVE-2023-51374 Improper Neutralization of Input During Web Page Generation Affects <= 1.0.11 Patched in 1.0.12
Vulnerability records provided by Wordfence Intelligence. Copyright 2012-2026 Defiant Inc. License and terms.
CVE records: Copyright 1999-2026 The MITRE Corporation. CVE terms of use.
Behavioral tests
via WP HiveAutomated install-time checks, tested on PHP 8.1.12 · WP 7.0.1
Languages
via translate.wordpress.orgTranslated into 3 languages, 0 at 90% or more
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
6 of 8 pass · checked 28 Oct 2026Can an assistant quote this readme? Eight deterministic checks over the wp.org listing, no model involved.
- ✓ Says what it does "ZeroBounce validates emails on your WordPress site in real-time, blocking invalid and risky emails to impro..."
- ✓ Has a FAQ 5 questions in the FAQ.
- ✓ FAQ asks real questions 5 of 5 read like questions a user would type.
- ! Names who it is for Never says who the plugin is for or what they use it for.
- ✓ Names what it works with Mentions WooCommerce, Contact Form 7, WPForms, Gravity Forms and 2 more.
- ✓ Headings and lists 3 headings and 3 lists.
- ✓ Enough to quote 1,677 characters of description.
- ! Tags match the text Only 2 of 5 tags appear in the text ("email checker", "email tester", "email verifier" missing).
Growth timeline
Install-tier crossings we have observed, and how long each tier took to outgrow
- 2026-07-10 1K+ → 900+ down after 556 days in tier
- 2024-12-31 2K+ → 1K+ down after 4 days in tier
- 2024-12-27 1K+ → 2K+ up after 1 days in tier
- 2024-12-26 2K+ → 1K+ down after 1 days in tier
- 2024-12-25 1K+ → 2K+ up after 2 days in tier
- 2024-12-23 2K+ → 1K+ down after 4 days in tier
- 2024-12-19 1K+ → 2K+ up after 4 days in tier
- 2024-12-15 2K+ → 1K+ down after 7 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).
-
Clearout Email Validator – Real-Time Email Verification on WordPress Forms 500+ installs · 4.0★ · 4 shared tags A -
Emailable – Premium Email Verification & Validation 30+ installs · 3.8★ · 4 shared tags D -
Email Checker 10+ installs · 3.6★ · 4 shared tags -
NoParam Email Validation – Email Verification & Anti-Spam Prevention — installs · 3.6★ · 4 shared tags -
DeBounce Email Validator 300+ installs · 3.9★ · 3 shared tags B -
QuickEmailVerification 200+ installs · 4.2★ · 3 shared tags A
Embed this report card
Drop a live Pulse card for ZeroBounce Email Verification & Validation into a readme, a review or a deck. It updates itself.
<iframe src="https://plugins.wpmayor.com/embed/zerobounce" width="480" height="300" style="border:0" loading="lazy" title="ZeroBounce Email Verification & Validation — Plugin Pulse"></iframe> ZeroBounce Email Verification & Validation: 900+ active installs, 4.8★ (4 reviews). Plugin Pulse (WP Mayor), as of 2026-10-31. https://plugins.wpmayor.com/plugin/zerobounce
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