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Free, no-signup calculators for the money side of building software and freelancing

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Chai is a BDD / TDD assertion library for node and the browser that can be delightfully paired with any javascript testing framework.

Which is more popular?
Based on our record, Chai seems to be more popular. It has been mentioned 4 times since March 2021.
Website, pricing, platforms and company facts side by side.
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| Website | devfinancetools.com | chaijs.com |
| Pricing | — | |
| Company | 2026 | — |
| Listed in |
In their own words, as submitted to SaaSHub.


DevFinanceTools is a collection of free, no-signup calculators for the money side of building software and freelancing. Everything runs in your browser — no account, no tracking beyond basic page-view analytics — and every tool shows its formulas and benchmarks so you can check the maths...
No description of Chai yet.
What each product offers, as listed by its team.


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


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Overall verdict
Why this product is good
Recommended for
Developers working with JavaScript or Node.js who require a versatile and easy-to-use assertion library. It's particularly beneficial for those utilizing frameworks like Mocha or Jasmine and those who appreciate a choice between BDD and TDD styles in their testing approach.
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Chai Review - with Liz Boccolini
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How often each product is chosen within a category, 0–100% relative to the other.


Share your experience with using DevFinanceTools and Chai. For example, how are they different and which one is better?
Recommendations tracked on public social media and blogs since March 2021.


Tracking DevFinanceTools since Aug 2026.
Mocha as the test runner, Chai as the assertion library, and the Hardhat Chai Matchers to extend Chai with contracts-related functionality. - Source: dev.to / about 4 years ago
Assertion library we used: Chai (comes with a lot of plugins worth exploring). - Source: dev.to / over 4 years ago
While this is fine and I could have perfectly moved all my tests to use said assertion style, I like the descriptive way Jest tests look like. As a quick way to maintain certain similarity I reached for ChaiJS, an assertion library that... - Source: dev.to / over 4 years ago
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