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Hunter.io VS IsValid.dev

Compare Hunter.io VS IsValid.dev and see what are their differences

Hunter.io

Find all the email addresses related to a domain

Rating
4.0 · 1 review
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?
ZeroTwo AI
ZeroTwo is a premium multi-provider AI platform which combines the tools models and features of Claude, Gemini, Grok, Openai and more into one. Canvas, Deep Research, MCP, Connectors, Agents, Projects and even Apps are all available in one place! sponsored
Note: These products don't have any matching categories. If you think this is a mistake, please edit the details of one of the products and suggest appropriate categories.

Which is more popular?

Based on our record, Hunter.io seems to be more popular. It has been mentioned 155 times since March 2021.

social mentions
155 vs 0
Lead Generation popularity
100% vs 0%
alternatives listed
240+ vs 11

Base details

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

Hunter.io
IsValid.dev
Website hunter.io isvalid.dev
Pricing
Official pricing
Freemium Free trial €9 / Monthly (10000 API calls / day) Official pricing
Platforms —
Python Node JS Wordpress
Company Startup from France —
Listed in
Lead Generation Sales Tools Email Marketing Marketing Platform +1
API Tools Developer Tools Data Validation Credit Card Validator Email Validator Email Validation Phone Number Validation Developer APIs APIs API +7

About Hunter.io and IsValid.dev

In their own words, as submitted to SaaSHub.

Hunter.io
IsValid.dev

No description of Hunter.io yet.

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.

Hunter.io 6 features
IsValid.dev 5 features
  • Large Database
    Hunter.io offers access to a substantial database of professional emails from a variety of domains, making it easier to find contact information.
  • Accuracy
    The service provides a high degree of accuracy by verifying email addresses in real-time, which reduces the chances of bounce backs.
  • Ease of Use
    The interface is user-friendly and intuitive, enabling even non-technical users to quickly find and verify email addresses.
  • API Integration
    Hunter.io provides robust API integration, allowing developers to incorporate its functionality into their own applications seamlessly.
  • GDPR Compliance
    The service adheres to GDPR regulations, ensuring that user data is handled in a privacy-compliant manner.
  • Chrome Extension
    Hunter.io offers a Chrome extension that enables users to find email addresses directly from their browser while visiting websites.
  • 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.

Hunter.io
IsValid.dev

Overall verdict

  • Hunter.io is generally considered a good tool for professionals who need reliable email search and verification services. Its wide range of features, ease of use, and reliable data make it a valuable resource for many users. However, as with any tool, it is important to assess your specific needs and evaluate whether its offerings align with your objectives.

Why this product is good

  • Hunter.io is a popular tool that is primarily used for finding and verifying professional email addresses. It is well-regarded for its accuracy and depth of data, offering users a vast database to search from. Hunter.io is particularly beneficial for salespeople, marketers, and recruiters who need to connect with potential clients, partners, or candidates efficiently. The platform provides features such as domain search, email verification, lead generation, and integrations with other CRM tools, which make it versatile and user-friendly.

Recommended for

  • Sales professionals looking to generate leads and connect with potential clients
  • Marketing teams aiming to reach out to prospective customers or partners
  • Recruiters and HR professionals seeking to verify or find candidate contact information
  • Entrepreneurs and business development specialists needing to expand their network

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

Videos

Walkthroughs and reviews on video.

Hunter.io 4 videos + Add
IsValid.dev 0 videos + Add

GTA Hunter Review

More videos

  • - FH-1 Hunter review! - GTA Online guides
  • - Hunters Review - Spoiler-Free
  • - Find email addresses in seconds • Hunter (Email Hunter) - mail tracker.hunter.io | hunter.io review

No IsValid.dev videos yet. You could help us improve this page by suggesting one.

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
Hunter.io
IsValid.dev
100% 100%
Lead Generation
0% 0%
0% 0%
APIs
100% 100%
100% 100%
Email Marketing
0% 0%
0% 0%
API
100% 100%

Questions & Answers

As answered by people managing Hunter.io 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

Share your experience with using Hunter.io and IsValid.dev. For example, how are they different and which one is better?

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Reviews and articles

External articles and on-site reviews we used to compare the two products.

Hunter.io 4.0 · 1 review
IsValid.dev no reviews yet

View more

We have no reviews of IsValid.dev yet. Be the first one to post

Social recommendations and mentions

Recommendations tracked on public social media and blogs since March 2021.

Hunter.io 155 mentions
IsValid.dev 0 mentions

View more

Tracking IsValid.dev since Apr 2026.

Alternatives to Hunter.io and IsValid.dev

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