Software Alternatives & Startups

Todoist VS IsValid.dev

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

Todoist

Todoist is a to-do list that helps you get organized, at work and in life.

Rating
0 reviews
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)
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, Todoist seems to be more popular. It has been mentioned 134 times since March 2021.

social mentions
134 vs 0
Task Management popularity
100% vs 0%
alternatives listed
240+ vs 11

Base details

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

Todoist
IsValid.dev
Website todoist.com isvalid.dev
Pricing
Freemium Free trial €9 / Monthly (10000 API calls / day) Official pricing
Platforms —
Python Node JS Wordpress
Company Startup from Poland —
Listed in

About Todoist and IsValid.dev

In their own words, as submitted to SaaSHub.

Todoist
IsValid.dev

No description of Todoist 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.

Todoist 7 features
IsValid.dev 5 features
  • Cross-Platform Availability
    Todoist is available on multiple platforms, including web, iOS, Android, macOS, and Windows, ensuring that you can access your tasks from virtually any device.
  • Collaboration Features
    Allows users to share projects, assign tasks, and add comments, making it ideal for team collaboration.
  • User-Friendly Interface
    Offers a clean and intuitive design that is easy to navigate, making task management straightforward.
  • Advanced Task Management
    Supports advanced features such as recurring tasks, labels, filters, and priorities, allowing for detailed and structured task organization.
  • Integration with Other Apps
    Integrates seamlessly with a variety of other productivity tools like Google Calendar, Slack, and Dropbox to enhance workflow.
  • Karma System
    Incorporates a gamification aspect where users earn points (Karma) for completing tasks, helping to boost motivation and productivity.
  • Offline Mode
    Offers offline access, allowing users to manage their tasks even without an internet connection.

Possible disadvantages

  • Limited Free Version
    The free version has limited features and storage, which might hinder full utilization for more complex task management.
  • Subscription Costs
    The premium and business plans can be relatively expensive compared to some alternatives, potentially being a barrier for budget-conscious users.
  • Steep Learning Curve for Advanced Features
    While the basic features are user-friendly, mastering the more advanced functions can take some time.
  • Lack of Native Time Tracking
    Todoist does not have built-in time tracking features, which might be a drawback for users looking to log the time spent on tasks.
  • Dependence on Third-Party Integrations
    Many advanced functionalities rely heavily on third-party integrations, which may require additional subscriptions and complicate the setup.
  • Notification Overload
    Users may find themselves overwhelmed with notifications, particularly in collaborative projects with many updates.
  • 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.

Todoist
IsValid.dev

Overall verdict

  • Todoist is a strong choice for individuals and teams looking for a reliable and user-friendly task management solution. Its blend of simplicity and powerful features provides a flexible environment that caters to both casual users and productivity enthusiasts.

Why this product is good

  • Todoist is considered a good task management tool by many users due to its intuitive design, cross-platform availability, and effective features such as task prioritization, project organization with labels and filters, and collaboration capabilities. It integrates well with various apps and services like Google Calendar, Slack, and Dropbox, enhancing its utility for personal productivity and team projects.

Recommended for

  • Individuals who want a simple yet effective task manager
  • Professionals who need to organize projects and collaborate with teams
  • Users seeking a cross-platform solution available on desktop, mobile, and web
  • People integrating productivity tools with other services like calendars and communication apps
  • Anyone looking to enhance their personal and work productivity systematically

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.

Todoist 2 videos + Add
IsValid.dev 0 videos + Add

Todoist Productivity App Review

More videos

  • - Why I'm Back with Todoist

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
Todoist
IsValid.dev
100% 100%
0% 0%
0% 0%
100% 100%
100% 100%
0% 0%
0% 0%
API
100% 100%

Questions & Answers

As answered by people managing Todoist 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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Reviews and articles

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

Todoist no reviews yet
IsValid.dev no reviews yet

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Social recommendations and mentions

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

Todoist 134 mentions
IsValid.dev 0 mentions

View more

Tracking IsValid.dev since Apr 2026.

Alternatives to Todoist and IsValid.dev

When comparing Todoist and IsValid.dev, you can also consider the following products.