Effect
TypeScript library for building production-grade applications, with typed errors, dependency injection, concurrency, scheduling and schema validation.
Effect is a TypeScript library with typed errors, dependency injection, concurrency, scheduling and schema validation. It is published on npm as effect and runs on Node.js, Deno and Bun, according to its installation guide. The repository is a monorepo that also holds integration packages, among them platform services for the browser, SQL clients and provider packages for AI services. The MIT license names Effectful Technologies Inc as the copyright holder, and the documentation is on effect.website.
Identity
Releases
Adoption
Sources
- 2026-11-08: links
effect.website/ - 2026-11-08: links
effect.website/docs/v4/onboarding - 2026-11-08: links, Written in, GitHub stars
api.github.com/repos/Effect-TS/effect - 2026-11-08: Maintainer, License
raw.githubusercontent.com/Effect-TS/effect/main/LICENSE - 2026-11-08: Runtime
effect.website/docs/v4/getting-started/installation - 2026-11-08: Current major version, Last release
github.com/Effect-TS/effect/releases/tag/effect@4.1.2 - 2026-11-08: Contributors
api.github.com/repos/Effect-TS/effect/contributors - 2026-11-08: npm downloads a week
api.npmjs.org/downloads/range/2026-11-01:2026-11-07/effect - 2026-11-08: Dependent packages, Dependent repositories
packages.ecosyste.ms/api/v1/registries/npmjs.org/packages/effect