effect-ts
Niche
Version 0.0.1
0
45
Fair- Weekly Downloads
- 202
↑471%
- Bundle (gzip)
- 73.0 B
- Updated
- Vulns
- 0
Health Score Breakdown
Maintenance
20
Popularity
20
Quality
50
Security
100
Stability
70
Effect-ts vs Fp-ts
Side-by-side NPM package comparison
Quick Verdict
Smallest Bundle
Effect-ts
73.0 B gzipped
Most Popular
Fp-ts
4.4M weekly downloads
Best Maintained
Fp-ts
40/100 maintenance score
Highest Quality
Fp-ts
80/100 quality score
Overall Pick
Fp-ts
Best all-around based on popularity, size, maintenance & quality
Version 2.16.11
0
74
GoodFunctional programming in TypeScript
- Weekly Downloads
- 4.4M
↑12%
- Bundle (gzip)
- 57.1 KB
- Updated
- Vulns
- 0
Health Score Breakdown
Maintenance
40
Popularity
100
Quality
80
Security
100
Stability
70
Choosing between Effect-ts and Fp-ts? Here's a data-driven comparison based on real npm data — downloads, bundle size, health scores, and more — to help you decide which package fits your project best.
Downloads & Popularity
Fp-ts leads with 4.4M weekly downloads — roughly 21746.1x more. Effect-ts has 202 weekly downloads. Higher download counts generally indicate broader community adoption and a larger ecosystem of tutorials, plugins, and support.
Bundle Size
Effect-ts has the smallest gzipped bundle at 73.0 B. Fp-ts comes in at 57.1 KB. A smaller bundle size means faster page loads, which improves user experience and Core Web Vitals scores.
Health Score Comparison
Fp-ts has an overall health score of 74/100 (good), with strong quality, security, popularity scores. Effect-ts has an overall health score of 45/100 (moderate), with strong security scores. Health scores are calculated from maintenance activity, code quality, security posture, popularity, and stability metrics.
When to Choose Each
Choose Effect-ts if you value minimal bundle footprint, strong security track record. Choose Fp-ts if you value large community support, strong security track record.
Our Verdict
Both Effect-ts and Fp-ts are solid choices for JavaScript development. Fp-ts has the edge in overall health score (74/100), while each package brings unique strengths to the table. Evaluate them based on your project's priorities — whether that's community size, bundle efficiency, or maintenance activity — and choose the one that aligns best with your requirements.
Frequently Asked Questions
- Is effect-ts better than fp-ts?
- It depends on your needs. Effect-ts has a health score of 45/100 while Fp-ts scores 74/100. Fp-ts has more weekly downloads (4.4M), suggesting broader adoption. Consider your specific requirements — bundle size, community support, and feature set — to decide which is the better fit.
- Which has a smaller bundle size, effect-ts or fp-ts?
- Effect-ts has the smaller gzipped bundle at 73.0 B. A smaller bundle means faster load times for your users, which can positively impact SEO and user experience.
- How many developers use effect-ts vs fp-ts?
- Based on npm download statistics, Effect-ts has approximately 202 weekly downloads and Fp-ts has approximately 4.4M weekly downloads. These numbers reflect package installations, not unique developers, but they indicate relative adoption levels.
- Which is better maintained, effect-ts or fp-ts?
- Fp-ts currently has the higher overall health score at 74/100. Effect-ts has a maintenance score of 20/100 and Fp-ts scores 40/100 on maintenance.
The 2026 JavaScript Stack Cheatsheet
One PDF: the best package for every category (ORMs, bundlers, auth, testing, state management). Used by 500+ devs. Free, updated monthly.