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IsValid.dev VS Last.fm

Compare IsValid.dev VS Last.fm and see what are their differences

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?
Last.fm

The world's largest online music service. Listen online, find out more about your favourite artists, and get music recommendations, only at Last.fm

Rating
0 reviews
Alternatives Is it good?
you.bot
One API for 80+ AI models — LLM, image, video & music — priced up to 80% below the official APIs. Pay only for successful calls; failed runs refunded; credits never expire. 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, Last.fm seems to be more popular. It has been mentioned 2622 times since March 2021.

social mentions
0 vs 2,622
APIs popularity
100% vs 0%
alternatives listed
11 vs 240+

Base details

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

IsValid.dev
Last.fm
Website isvalid.dev last.fm
Pricing
Freemium Free trial €9 / Monthly (10000 API calls / day) Official pricing
—
Platforms
Python Node JS Wordpress
—
Company — Startup from the United Kingdom
Listed in
API Tools Developer Tools Data Validation Credit Card Validator Email Validator Email Validation Phone Number Validation Developer APIs APIs API +7
Music Music Streaming Online Music Music Player +1

About IsValid.dev and Last.fm

In their own words, as submitted to SaaSHub.

IsValid.dev
Last.fm

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

No description of Last.fm yet.

Features and specs

What each product offers, as listed by its team.

IsValid.dev 5 features
Last.fm 5 features
  • 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.
  • Personalized Recommendations
    Last.fm offers music recommendations tailored to the user's tastes based on their listening history.
  • Scrobbling
    The service tracks the music a user listens to across various platforms and devices, helping create a comprehensive listening profile.
  • Community Features
    Users can join groups, participate in discussions, and share music tastes with others, fostering a sense of community.
  • Discover New Music
    Last.fm helps users discover new artists and songs that they might like, making it easier for them to expand their musical horizons.
  • Visual Insights
    The platform provides graphs and charts that offer visual insights into a user's listening habits and trends over time.

Possible disadvantages

  • Subscription Costs
    Access to some of Last.fm’s advanced features requires a subscription, which might not be ideal for all users.
  • Data Privacy Concerns
    The extensive tracking of listening habits may raise privacy concerns for some users.
  • Interface Complexity
    The user interface can be somewhat complex and cluttered, which might be challenging for new users to navigate.
  • Platform Dependency
    Its effectiveness relies on integration with other music services, meaning it is less useful if it doesn’t sync well with the user’s primary music platform.
  • Limited Offline Features
    Without an active internet connection, many of Last.fm's features become inaccessible, limiting its utility.

Analysis

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

IsValid.dev
Last.fm

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

Overall verdict

  • Last.fm is considered a good platform for music enthusiasts who want to explore new music and understand their listening habits better. Its powerful scrobbling feature and community elements make it a valuable tool for music discovery.

Why this product is good

  • Last.fm is a music recommendation and discovery service that provides personalized music suggestions based on a user's listening habits. It allows users to track their music listening history, provides insights and statistics, and helps discover new music through recommendations and a rich community-driven database.

Recommended for

  • Music lovers seeking personalized recommendations.
  • Listeners who want to track and analyze their music habits.
  • Individuals interested in discovering new artists and songs.
  • Users who enjoy engaging with a community of music enthusiasts.

Videos

Walkthroughs and reviews on video.

IsValid.dev 0 videos + Add
Last.fm 2 videos + Add

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

DO NOT USE last.fm website review (BAD WEBSITE)

More videos

  • - Music I Listened to in 2018 [last.fm]

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
IsValid.dev
Last.fm
100% 100%
APIs
0% 0%
0% 0%
Music
100% 100%
100% 100%
API
0% 0%
0% 0%
Music Streaming
100% 100%

Questions & Answers

As answered by people managing IsValid.dev and Last.fm.

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 IsValid.dev and Last.fm. 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.

IsValid.dev no reviews yet
Last.fm no reviews yet

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

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Social recommendations and mentions

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

IsValid.dev 0 mentions
Last.fm 2622 mentions

Tracking IsValid.dev since Apr 2026.

  • 'Death to Spotify': the DIY movement to get artists and fans to quit the app
    We used to have very good discoverability platforms, e.g. https://last.fm . Then streaming came along and destroyed everything. - Source: Hacker News / 12 months ago
  • The day I canceled my Spotify subscription
    I switched to https://qobuz.com, mainly for the high audio quality (it goes up to 192kHz 24bit, which is worth it for me as I have the necessary equipment to make use of this), but it also supports "Spotify quality" i.e. Mp3 quality/320... - Source: Hacker News / over 2 years ago
  • Mr. Bungle - Nananana (lost fake song)
    Hi, anyone remember that song? I remember I downloaded it from ares and I liked it but unfortunately it wasn't by mr bungle, it was just mislabelled (like the toxic cover). If anyone has it around I would like to hear it again! On... Source: almost 3 years ago

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