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NumberBroom VS IsValid.dev

Compare NumberBroom VS IsValid.dev and see what are their differences

NumberBroom

Scrub phone lists for TCPA litigators, line type and carrier. Pay per list, no subscription. Preview 20 rows free.

Rating
0 reviews
Pricing
Freemium $0.2 (Per phone number, $5 minimum, no subscription)
Alternatives Is it good?
IsValid.dev

A powerful REST API for validating emails, IBANs, BIC/SWIFT codes, LEI, ISIN, credit cards, VAT numbers, phone numbers, and 70+ more validators. Free tier available.

Rating
0 reviews
Pricing
Freemium Free trial €9 / Monthly (10000 API calls / day)
Alternatives Is it good?
Bluebox.ai
Bluebox gives coding agents the production context they are missing. It briefs your agent with live runtime behavior before a change, investigates incidents, explains likely root cause, and returns a GitHub issue you review. Free to start. sponsored

Which is more popular?

TCPA Validation popularity
100% vs 0%
alternatives listed
10 vs 11

Base details

Website, pricing, platforms and company facts side by side.

NumberBroom
IsValid.dev
Website numberbroom.com isvalid.dev
Pricing
Freemium $0.2 (Per phone number, $5 minimum, no subscription) Official pricing
Freemium Free trial €9 / Monthly (10000 API calls / day) Official pricing
Platforms
Web REST API MCP
Python Node JS Wordpress
Company Startup from the United States · 1 - 9 employees · 2026 —
Listed in
TCPA Validation Carrier Lookup Phone Number Verification Phone Validator Phone Validator API Phone Number Validation Phone Lookup +4
API Tools Developer Tools Data Validation Credit Card Validator Email Validator Email Validation Phone Number Validation Developer APIs APIs API +7

About NumberBroom and IsValid.dev

In their own words, as submitted to SaaSHub.

NumberBroom
IsValid.dev

NumberBroom scrubs US phone lists before you call or text them. Upload a CSV, Excel or PDF file, or paste the numbers. Every number is checked against current carrier data for line type (mobile, landline or VoIP), carrier and recent activity, and known TCPA litigators are removed. You download...

Read more about NumberBroom

IsValid is a validation API service for developers who need to quickly verify data formats without building their own validators. It offers 40+ endpoints covering financial identifiers (IBAN, BIC, ISIN, CUSIP), international standards (ISBN, ISSN), technology formats (UUID, JWT, QR codes),...

Read more about IsValid.dev

Features and specs

What each product offers, as listed by its team.

NumberBroom 8 features
IsValid.dev 5 features
  • TCPA Litigator
    Known TCPA litigators removed from every list
  • Line Type Check
    Mobile, landline or VoIP (fixed or non-fixed) for each number
  • Carrier Lookup
    The carrier serving each number today, from current routing data
  • Disconnected Detection
    An activity score flags numbers that look disconnected
  • File Upload
    Upload CSV, Excel or PDF, or paste numbers; every original column is kept
  • Free Preview
    Scrub 20 rows of your list free before you pay
  • Screening Record
    A dated record of what each job checked and removed
  • REST API and MCP
    Single-number lookups at $0.20, prepaid, plus an MCP server for AI coding tools
  • Lightweight schema validation
    IsValid.dev offers a minimal, lightweight approach to schema validation for TypeScript, avoiding the bloat that can come with larger validation libraries.
  • TypeScript-first design
    Built with TypeScript in mind, providing strong type inference so validated data automatically gets proper TypeScript types without extra manual typing.
  • Simple API
    The library offers an intuitive and easy-to-learn API for defining and running validations, making it accessible for developers to quickly get started.
  • Zero or minimal dependencies
    Being a lightweight tool, it typically has little to no external dependencies, reducing bundle size and potential security/maintenance issues from third-party packages.
  • Good for small to medium projects
    Its simplicity makes it well suited for smaller projects or use cases where heavier libraries like Zod or Yup might be overkill.

Possible disadvantages

  • Smaller community and ecosystem
    Compared to established validation libraries like Zod, Joi, or Yup, IsValid.dev has a much smaller user base, meaning fewer community resources, tutorials, and third-party integrations.
  • Limited documentation
    As a newer or less mainstream tool, its documentation may be less comprehensive than more established alternatives, making it harder to find answers to edge-case questions.
  • Fewer advanced features
    It may lack some of the advanced features found in more mature libraries, such as extensive built-in validators, custom error message localization, or complex schema composition tools.
  • Less battle-tested
    Being less widely adopted, it may not have been tested against as many real-world edge cases as more popular libraries, potentially leading to undiscovered bugs.
  • Uncertain long-term support
    Newer or niche libraries carry a higher risk of reduced maintenance or discontinuation over time compared to well-funded or widely-adopted projects.

Analysis

An editorial look at what each product does well and who it suits.

NumberBroom
IsValid.dev

No analysis of NumberBroom yet.

Overall verdict

  • IsValid.dev appears to be a developer-focused validation/utility tool that can be useful for quick, lightweight validation tasks, though I don't have verified, up-to-date details on its full feature set or reliability track record.

Why this product is good

  • Likely offers a simple, developer-friendly interface for validation tasks
  • Probably free or low-cost, making it accessible for quick checks
  • May support common validation formats (e.g., JSON, schemas, or data formats) useful in development workflows
  • Could save time compared to writing custom validation scripts for simple use cases

Recommended for

  • Developers needing quick, ad-hoc validation checks
  • Small projects or prototypes where a lightweight tool suffices
  • Users looking for a free or low-cost alternative to more complex validation suites
  • Learning or testing purposes rather than mission-critical production validation

Category popularity

How often each product is chosen within a category, 0–100% relative to the other.

Score bands 0–20 21–40 41–50 51–60 61–100
NumberBroom
IsValid.dev
100% 100%
TCPA Validation
0% 0%
0% 0%
APIs
100% 100%
100% 100%
Phone Number Verification
0% 0%
0% 0%
API
100% 100%

Questions & Answers

As answered by people managing NumberBroom and IsValid.dev.

What makes your product unique?

IsValid.dev's answer:

IsValid offers 70+ validators in a single API — covering financial identifiers (IBAN, BIC, ISIN, LEI), international standards (ISBN, ISSN), technology formats (UUID, JWT, QR codes), tax numbers (VAT, REGON, PESEL), credit cards, phone numbers, and more. No need to integrate multiple services for different data types.

Why should a person choose your product over its competitors?

IsValid.dev's answer:

Most validation APIs focus on one category (email or phone). IsValid covers financial, regional, and technical formats all in one place with a consistent REST API. The free tier with 100 calls/day requires no credit card, and integration takes minutes.

How would you describe the primary audience of your product?

IsValid.dev's answer:

Developers and software teams building applications that handle user input, financial data, or international identifiers — particularly in fintech, e-commerce, and SaaS products.

What's the story behind your product?

IsValid.dev's answer:

IsValid was built out of frustration with piecing together multiple validation libraries and services. The goal was a single, reliable API that handles the full range of data validation needs developers encounter in real-world applications.

Which are the primary technologies used for building your product?

IsValid.dev's answer:

Next.js, Fastify, PostgreSQL, Docker

User comments

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