A decision guide to Fp-Ts: what it is for, when it fits, how to start, and which compatibility or maintenance details deserve a closer look.

Quick verdict

📢 Important Announcement: fp-ts is Joining the Effect-TS Ecosystem!

Shortlist Fp-Ts only if its documented purpose matches your use case; the source signals below are context, not an endorsement.

Best fit — and when to skip it

Fp-Ts is most relevant to developers working with JavaScript/TypeScript. Its source topics point to typescript, algebraic data types, functional programming. It belongs on a shortlist when that stated purpose matches a concrete requirement.

Skip or postpone it when the documented runtime, license, dependency footprint, or maintenance model conflicts with your project. Popularity alone is not a reason to migrate.

Setup and first checks

Confirm the exact package name, current version, runtime requirement, dependencies, provenance, and release notes before installing fp-ts in a production project. Start in a disposable example and exercise the use case you actually need.

Maintenance and risk signals

The collected source record shows 4.4M weekly downloads, version 2.16.11, and released 2025-08-18.

The registry lists 1 maintainers.

The source reports the MIT license.

Registry downloads include automated requests and are not unique users, satisfaction, or proof of quality.

Bottom line

Fp-Ts is worth a closer look when its stated purpose and ecosystem fit your project. Compare it with related tools, verify the current documentation, and test the smallest realistic use case before committing.

Try it safely

npm install fp-ts

Use the official npm package page to confirm the current version, documentation, dependencies, provenance, and compatibility requirements before installing it in an important project.

At a glance

📦 4.4MWeekly NPM Downloads
NPMPackage Registry
⭐ 11.5kLinked GitHub Stars (total)
🔀 511Linked GitHub Forks (total)

Weekly downloads measure registry requests, including automated installs. They are not GitHub star growth and do not represent unique users.

Sources and methodology

This guide uses public records collected on 2026-08-10. Source completeness is High; this label is not a product rating.

View the supporting source data

Evidence limitations

  • Official metadata was collected as source evidence; no independent installation, benchmark, security audit, or practical product evaluation is claimed.

Data note: This automated workflow updated the guide on 2026-08-10 from public NPM package records. Metrics can change after collection. No independent product testing or endorsement is claimed.