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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.

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Paw is a REST client for Mac.
Which is more popular?
Based on our record, RapidAPI for Mac seems to be more popular. It has been mentioned 47 times since March 2021.
Website, pricing, platforms and company facts side by side.
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| Website | isvalid.dev | paw.cloud |
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In their own words, as submitted to SaaSHub.


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),...
No description of RapidAPI for Mac yet.
What each product offers, as listed by its team.


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Why this product is good
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Overall verdict
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How often each product is chosen within a category, 0–100% relative to the other.


As answered by people managing IsValid.dev and RapidAPI for Mac.
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.
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.
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.
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.
IsValid.dev's answer
Next.js, Fastify, PostgreSQL, Docker
Share your experience with using IsValid.dev and RapidAPI for Mac. For example, how are they different and which one is better?
External articles and on-site reviews we used to compare the two products.


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Are you a developer that works with macOS? Then Paw is the right pick for you. Paw is specifically built for macOS. As such, it is arguably the best tool for Mac interface. Unlike Postman which majorly revolves around...
Paw is a full-featured HTTP client, which allows you to send all kinds of HTTP requests. With Paw, you can test your APIs and also explore new ones.
Paw is an advanced API tool with powerful features designed explicitly for Mac. Its primary function is to test and describe APIs, and it provides a beautiful interface to make activities such as composing requests,...
Recommendations tracked on public social media and blogs since March 2021.


Tracking IsValid.dev since Apr 2026.
RapidAPI for Mac, formerly Paw, it's free for individuals. https://paw.cloud/. - Source: Hacker News / 12 months ago
If you're on macOS, try Paw/RapidAPI https://paw.cloud They may be affected by AWS. - Source: Hacker News / 12 months ago
Although Apidog is a popular REST client, you can also use others, such as Insomnia, RapidAPI for Mac, and Hoppscotch. - Source: dev.to / almost 2 years ago
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Official company data from 50+ European business registers plus GLEIF LEI — one REST API for KYB, compliance and firmographic enrichment
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