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Joplin VS IsValid.dev

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

Joplin

Joplin is a free, open source note taking and to-do application, which can handle a large number of notes organised into notebooks. The notes are searchable, tagged and modified either from the applications directly or from your own text editor.

Rating
0 reviews
Pricing
Open source Free
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?
CloudCLI
Shared cloud environments for AI coding agents. Run Claude Code, Cursor CLI, Codex, and Gemini CLI from any device, API, or automation tool. 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, Joplin seems to be more popular. It has been mentioned 358 times since March 2021.

social mentions
358 vs 0
Note Taking popularity
100% vs 0%
alternatives listed
240+ vs 11

Base details

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

Joplin
IsValid.dev
Website joplinapp.org isvalid.dev
Pricing
Open source Free Official pricing
Freemium Free trial €9 / Monthly (10000 API calls / day) Official pricing
Platforms —
Python Node JS Wordpress
Company Startup from Open Source/Community —
Listed in
Note Taking Personal Notes Notes Knowledge Management +1
API Tools Developer Tools Data Validation Credit Card Validator Email Validator Email Validation Phone Number Validation Developer APIs APIs API +7

About Joplin and IsValid.dev

In their own words, as submitted to SaaSHub.

Joplin
IsValid.dev

No description of Joplin 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.

Joplin 6 features
IsValid.dev 5 features
  • Open Source
    Joplin is open source, which means the source code is freely available and can be modified or studied by anyone. This ensures transparency and provides the community with the ability to contribute to its development.
  • Cross-Platform
    Joplin is available on multiple platforms including Windows, macOS, Linux, Android, and iOS, which allows users to access their notes and to-dos across different devices.
  • End-to-End Encryption
    Joplin offers end-to-end encryption, ensuring that your notes and data are securely encrypted and only accessible by you.
  • Rich Text Support
    Joplin supports Markdown, which allows users to create notes with rich text formatting, including headers, lists, checkboxes, images, links, and more.
  • Synchronization Options
    Joplin provides multiple options for synchronization, including cloud services like Dropbox, OneDrive, and Nextcloud, enabling users to keep their data in sync across devices.
  • Resource Management
    Joplin allows users to attach files, images, and other resources to their notes, making it a versatile tool for managing different types of information.

Possible disadvantages

  • User Interface
    The user interface of Joplin can be less intuitive and visually appealing compared to other note-taking apps, which might lead to a steeper learning curve for new users.
  • Limited Collaboration
    Joplin is primarily designed for individual use and lacks extensive collaboration features found in other apps like Google Keep or Evernote, making it less suitable for team-based tasks.
  • No Native Web App
    Joplin does not have a native web app version, which can be a drawback for users who prefer accessing their notes through a browser without installing the desktop or mobile applications.
  • Sync Configuration
    Setting up synchronization options can be complex for some users, especially for those who are not familiar with cloud services or network configurations.
  • Resource Intensive
    Joplin can be resource-intensive, particularly when dealing with a large number of notes or attachments, which might affect performance on older devices.
  • 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.

Joplin
IsValid.dev

Overall verdict

  • Joplin is highly regarded among users who appreciate open-source software and need a versatile note-taking solution. Its extensive features, along with active community support, make it a strong contender in the productivity software space.

Why this product is good

  • Joplin is an open-source note-taking and to-do application with features such as synchronization across devices, support for rich-text and Markdown, and a web clipper for saving web pages and screenshots. It prioritizes user privacy and data ownership by allowing notes to be stored on local devices or using secure sync options like Nextcloud, Dropbox, or OneDrive. Additionally, Joplin supports end-to-end encryption to protect user data.

Recommended for

  • Users who prefer open-source applications
  • Individuals seeking a secure and privacy-focused note-taking app
  • People who need cross-platform compatibility
  • Users who want to organize notes using Markdown
  • Anyone looking for an alternative to mainstream note-taking apps

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.

Joplin 3 videos + Add
IsValid.dev 0 videos + Add

Joplin, a free, open source, self hosted syncing note taking alternative to Evernote and OneNote..

More videos

  • - Joplin Is An Open Source Alternative To Evernote
  • - Joplin Desktop: Take Notes With A Rich Markdown Editor

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
Joplin
IsValid.dev
100% 100%
Note Taking
0% 0%
0% 0%
APIs
100% 100%
100% 100%
Notes
0% 0%
0% 0%
API
100% 100%

Questions & Answers

As answered by people managing Joplin 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 Joplin 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.

Joplin no reviews yet
IsValid.dev no reviews yet

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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.

Joplin 358 mentions
IsValid.dev 0 mentions
  • Show HN: Files.md – open-source alternative to Obsidian
    What is this providing over similarly Markdown based open source note taking applications like Joplin? (https://joplinapp.org/) I've been a huge fan of the fact that my backend sync infrastructure is my own self-hosted S3 bucket with... - Source: Hacker News / 5 months ago
  • An Introduction to Obsidian
    Shout out to Joplin (https://joplinapp.org/), which I use on a daily basis. It does most of what Obsidian does but has a free sync version where you just use your cloud drive as the storage. The main thing missing, from what I've found,... - Source: Hacker News / 6 months ago
  • Ditching Obsidian and building my own
    I use Joplin (https://joplinapp.org) on mobile and pc(windows and Linux). Joplin has a free encrypted sync via OneDrive. - Source: Hacker News / over 1 year ago

View more

Tracking IsValid.dev since Apr 2026.

Alternatives to Joplin and IsValid.dev

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