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Haskell vs Idris: catalog facts
Haskell	Idris
Free Free and open source.	Free Free and open source under the BSD 3-Clause licence.
Windows, Command line	Windows, Command line
Strong static type system catches errors early Pure functions and immutability make code easier to reason about	Types are first-class and can describe precise program properties Compiler can check assumptions and proofs before the program runs
Steep learning curve for programmers used to imperative languages Lazy evaluation can make performance harder to predict	Small ecosystem compared with mainstream languages Dependent types have a steep learning curve
Downloadable app	Downloadable app
Open source	Open source
License: BSD-3-Clause	License: BSD-3-Clause
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked October 2, 2026

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