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Numsift — Bulk WhatsApp Number Checker & Validator | Export to Excel icon

Numsift Chrome Extension Analysis

Social Media Growth & Marketing

Store listing title: Numsift — Bulk WhatsApp Number Checker & Validator | Export to Excel

Chrome extension ID: cjmnmblbldpafmfpkfeafigacdjecacg

Numsift is a productivity tool that verifies whether a list of phone numbers is registered on WhatsApp. It supports bulk imports via CSV or Excel and allows users to filter results by registration status, country, and business account type before exporting.

Developer:yasininprofili
Version:0.1.0
Size:811KiB
Last updated:
View developer profile
External:Chrome Web StoreOfficial website

Overview

Installs

43

Rating

★ 5.0

6 reviews

Languages

55 locales

Includes Deutsch, English, English (Australia), English (United Kingdom)...

Market analysis

Review-backed positioning, friction, and market signals for this Chrome extension.

Backed by review samples

Macro category

Social Media Growth & Marketing

Pricing friction

Low review signal

Complaint intensity

Low review signal

Listing & review signals
Observed signals from store listing text and review samples.

Listing positioning

The product is positioned as a secure, browser-based bulk validator for WhatsApp numbers designed to clean outreach lists. It emphasizes user privacy by processing data locally and provides adjustable speeds to mitigate account risk.

Inferred product pattern

Privacy-focused, browser-based utility for lead list hygiene targeting WhatsApp marketers.

Review-backed pain points

No negative pain points identified in the provided review samples.

Observed feature gaps

The tool requires numbers to include country codes to function, which may be a limitation for users with unformatted data.

Tags
WhatsApp ValidatorBulk Number CheckerLead CleaningMarketing ToolContact Validation
Target users

- Sales and outreach teams

- E-commerce sellers

- Recruiters

- Digital marketers

- CRM administrators

Primary use cases

- Cleaning prospect lists before marketing campaigns

- Filtering scraped lists for active WhatsApp users

- Separating B2B contacts using business account detection

- Validating international numbers across different countries

Positive themes

- Reliable processing of large batches

- Significant time savings over manual verification

- Clean and responsive user interface

- Accurate validation results

- Seamless CSV import and export functionality

Negative themes

No negative theme data.

Observed friction

- No pricing friction observed; the product is claimed to be entirely free with no daily caps or paywalled exports.

Evidence boundary: Analysis based on detailed store listing claims and six 5-star user reviews. The review sample size is small and contains only positive feedback, which may not reflect the full spectrum of user experience.
Complaint summaries
Review-backed complaint signals grouped by operational area.

Support

No support complaints identified in provided data.

Reliability

No reliability complaints identified; user reviews explicitly highlight the tool's reliability with large lists.

Privacy

No privacy complaints identified; the listing emphasizes a no-relay-server architecture.

Access & pricing

- Free usage observed

- Account required for core usage

- Free plan or free usage claimed

Store listing facts

Listing assets

- Screenshots: 5

- Videos: 0

- Languages: 55

Trust signals

- Privacy policy

- Developer contact

- Official website

Store metadata

- Version: 0.1.0

- Size: 811KiB

- Last updated:

Listing SEO keywords

Search intent keywords
Keyword signals for evaluating how users may discover, compare, or search for this extension category.

Core discovery

bulk whatsapp number checkerwhatsapp number validatorverify whatsapp numberswhatsapp contact filter

Comparison

best whatsapp number checkernumsift vs whatsapp validator

Problem

invalid whatsapp numbersclean whatsapp lead listcheck if number is on whatsapp

Alternative

whatsapp number checker alternativefree whatsapp validator

Similar extensions

Jump to related discovery paths:

More in toolsMore from this developer

Screenshots

Numsift — Bulk WhatsApp Number Checker & Validator | Export to Excel screenshot
Numsift — Bulk WhatsApp Number Checker & Validator | Export to Excel screenshot
Numsift — Bulk WhatsApp Number Checker & Validator | Export to Excel screenshot
Numsift — Bulk WhatsApp Number Checker & Validator | Export to Excel screenshot
Numsift — Bulk WhatsApp Number Checker & Validator | Export to Excel screenshot

Links

Website: addonschrome.com

Privacy policy: https://www.addonschrome.com/privacy.html

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