---
title: "Effect"
pageType: "tool-profile"
schemaVersion: "1.0"
snapshotId: "tv-20260915-f4c107995a2e"
generatedAt: "2026-09-15T07:02:20.000Z"
canonicalUrl: "https://toolvitals.com/tools/effect/"
jsonUrl: "https://toolvitals.com/api/agent/tools/effect"
indexable: true
---

# Effect

Build production-ready applications in TypeScript

## Decision context

- Status: active
- ToolVitals score: 98/100
- Health score: 98/100
- Shipping score: 98/100
- Score mode: verdict
- Data confidence: 90/100
- Source coverage: 100/100
- Last evidence check: 2026-09-14

## Classification

- Use case: Runtime Libraries (runtime-libraries)
- Category: Frameworks & Libraries (frameworks)
- Tool mode: Library Framework
- Openness: OSI-approved OSS
- License: MIT
- Tags: open-source, cli, clustering, concurrency, dependency-injection, effect, error-handling, javascript, observability, opentelemetry, platform, schema, typescript, workflows

## Public repository signals

- Repository: [Effect-TS/effect](https://github.com/Effect-TS/effect)
- Stars: 16018 (adoption context only)
- Forks: 740
- Open issues: 264
- Last commit date: 2026-09-14
- Releases in 90 days: 30

## Source receipts

- [Official website](https://effect.website/) — checked 2026-09-14
- [Source repository](https://github.com/Effect-TS/effect) — checked 2026-09-14

## Discovery status

- Search indexable: yes
- Reason: sufficient tool evidence

## Interpretation limits

- ToolVitals scores summarize bounded public maintenance, shipping, openness, and evidence signals. They are not user-review ratings.
- GitHub stars and related popularity metrics are adoption context, not quality evidence.
- Missing values mean not collected or not confidently established; they do not mean zero.
- Public signals do not prove security, uptime, support quality, customer satisfaction, or production suitability.
- Verify material decisions against the linked first-party sources and your own requirements.