Who should use Duplicate Killer?

Duplicate Killer is a B2B product built for wordPress and WooCommerce site owners.

Does Duplicate Killer have a free plan?

Yes — Duplicate Killer is free to use.

What platforms does Duplicate Killer run on?

Duplicate Killer runs on the web.

Is Duplicate Killer still active?

PulseGate's automated liveness checks currently classify Duplicate Killer as active.

What tools are similar to Duplicate Killer?

Similar tools tracked by PulseGate include Duplicate Title Validator, Captcha Spam Blocker, and Duplicate and Auto Draft Cleaner.

Who develops Duplicate Killer?

Duplicate Killer is developed by NIA.

How long has Duplicate Killer been around?

Duplicate Killer first shipped in 2022.

PulseGatePost-LLM software, agents & workflows market (since 2022)

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Duplicate Killer

Name: Duplicate Killer
Author: NIA

wordpress.orgForms, surveys & polls

Duplicate Killer is a WordPress plugin that blocks duplicate form submissions by validating unique email, phone, and text fields. It also prevents accidental duplicate orders in WooCommerce, providing server-side protection without requiring CAPTCHA.

Free

WebCloud-managed

Visit wordpress.org

Overview

5 features

Duplicate Killer is a Forms, surveys & polls product. It focuses on preventing duplicate form and order submissions on WordPress and WooCommerce sites without using CAPTCHA. Duplicate Killer is a B2B product aimed at wordPress and WooCommerce site owners. Duplicate Killer costs nothing to use. The product ships for the web.

Behind Duplicate Killer is NIA, and the product first shipped in 2022. Across PulseGate's embedding index, Duplicate Killer has few near neighbours, marking it as relatively distinct. Among its 5 catalogued features are duplicate submission blocking, wooCommerce support, and unique field validation.

Duplicate submission blocking
WooCommerce support
Unique field validation
No CAPTCHA required
Server-side protection

Built with & integrations

Runs on: BrowserCloud-managed

Trust & compliance

LicenseProprietary

Verified signals

HTTPS Privacy Policy Free tier

Legal

Recent events

Latest indexed changes and source events

IndexedJun 29, 11:30 AM
wordpress.org discovered by the PulseGate indexer
Source: PulseGate indexerOpen ↗

Frequently asked questions about Duplicate Killer

What is Duplicate Killer?: Duplicate Killer focuses on preventing duplicate form and order submissions on WordPress and WooCommerce sites without using CAPTCHA. It is catalogued under Forms, surveys & polls on PulseGate.
Who should use Duplicate Killer?: Duplicate Killer is a B2B product built for wordPress and WooCommerce site owners.
Does Duplicate Killer have a free plan?: Yes — Duplicate Killer is free to use.
What platforms does Duplicate Killer run on?: Duplicate Killer runs on the web.
Is Duplicate Killer still active?: PulseGate's automated liveness checks currently classify Duplicate Killer as active.
What tools are similar to Duplicate Killer?: Similar tools tracked by PulseGate include Duplicate Title Validator, Captcha Spam Blocker, and Duplicate and Auto Draft Cleaner.Duplicate Title Validator Captcha Spam Blocker Duplicate and Auto Draft Cleaner
Who develops Duplicate Killer?: Duplicate Killer is developed by NIA.
How long has Duplicate Killer been around?: Duplicate Killer first shipped in 2022.

At a glance

Pricing: Free
Platforms: Web
Languages: English
First seen: Jan 21, 2023
Activity: 🟢 Active
Status: 🟢 Active
Built for: WordPress and WooCommerce site owners
Model: B2B
Solves: Preventing duplicate form and order submissions on WordPress and WooCommerce sites without using CAPTCHA.

Developer

NIA

PulseGate index

Confidence: High · 98
Indexed: Jun 29, 2026
Lifecycle: Alive
Activity: Active
First seen: Jan 2023
Last seen: 2w ago
Freshness: Unknown

Identity audit (9)

Entity ID: cmqz4zr4u003eyb2lkjg384i0
Slug: duplicate-killer-prevent-duplicate-form-submissions-wordpress-org
Verification state: Indexed for public listing
Claim / listing state: Unclaimed · listed: yes
Index status: Included in index
Latest evidence snapshot: Jun 29, 2026
Timeline basis: Indexed-at chronology (no inferred launch/funding milestones).
Last updated: Jul 11, 2026
Canonical URL: https://wordpress.org/plugins/duplicate-killer

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