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F#

F#

F# is a functional‑first, strongly typed language that combines the power of functional programming with the flexibility of object‑oriented and imperative styles - all on the .NET platform.

Used at
fsharp.org github.com stackoverflow.com

About F#

F# is a versatile language for developers who value elegance, robustness and long‑term code quality. Born from OCaml and ML and matured within the .NET ecosystem, F# offers powerful type inference, pattern matching and immutability by default - ideal for modeling complex domains without drowning in boilerplate.

But F# isn’t just for academics or functional purists. It interoperates seamlessly with C#, has full access to the .NET ecosystem and works well in Visual Studio, VS Code and Rider. You can even compile F# to JavaScript with tools like Fable if you want to target the web.

If you want a language that helps you focus on the problem rather than syntax and makes it easier to write code that’s both expressive and correct, F# is well worth a closer look.

F# is often used together with

C#

F# is used at

AnturaAntura helps companies get their projects and portfolios in order with smart digital tools - delivered with a strong focus on simplicity and quality.
InsurelloInsurello helps you claim the insurance compensation you’re entitled to - without you having to handle the case yourself, and with no fee if they don’t succeed.
MedomaMedoma is a Swedish company that turns the home into a hospital - using smart AI technology to coordinate advanced care at the patient’s home.
ProffsmagasinetProffsmagasinet is the e-commerce store that makes it easy - and fun - to tackle home and professional projects with a vast assortment, fast deliveries and exceptional service.
Prover TechnologyProver Technology is a Stockholm-based tech company using formal methods and digital twins to make railway signaling systems safer and smarter - quickly and cost-effectively.
Svea BankSvea Bank is not your ordinary bank - it combines a fintech mindset with traditional banking, where innovation and entrepreneurship go hand in hand.
SylogSylog is the consultancy that makes complex problems simple - with people, technology and a healthy dose of engineering passion.