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Comparison guide

Argon2 vs Bcrypt

Argon2 won the Password Hashing Competition. bcrypt has 20+ years of battle-testing. Compare security, performance, bundle size, and serverless compatibility.

Hero image for Argon2 vs Bcrypt

Quick Verdict

Smallest Bundle

Bcrypt

2.3 KB gzipped

Most Popular

Argon2

0 weekly downloads

Best Maintained

Argon2

80/100 maintenance score

Highest Quality

Argon2

50/100 quality score

Overall Pick

Bcrypt

Best all-around based on popularity, size, maintenance & quality

argon2 icon

argon2

Niche

Version 0.45.1

0
61
Good

An Argon2 library for Node

Weekly Downloads
0

Trend data unavailable

Bundle (gzip)
3.1 KB
Updated
Vulns
0

Health Score Breakdown

Maintenance
80
Popularity
10
Quality
50
Security
100
Stability
70
bcrypt icon

bcrypt

Niche

Version 6.0.0

0
55
Fair

A bcrypt library for NodeJS.

Weekly Downloads
0

Trend data unavailable

Bundle (gzip)
2.3 KB
Updated
Vulns
0

Health Score Breakdown

Maintenance
60
Popularity
10
Quality
50
Security
100
Stability
70

Choosing between Argon2 and Bcrypt? 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

Argon2 and Bcrypt both have 0 weekly downloads, indicating equal adoption in the ecosystem.

Bundle Size

Bcrypt has the smallest gzipped bundle at 2.3 KB. Argon2 comes in at 3.1 KB. A smaller bundle size means faster page loads, which improves user experience and Core Web Vitals scores.

Health Score Comparison

Argon2 has an overall health score of 61/100 (good), with strong maintenance, security scores. Bcrypt has an overall health score of 55/100 (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 Argon2 if you value minimal bundle footprint, strong security track record. Choose Bcrypt if you value minimal bundle footprint, strong security track record.

Our Verdict

Both Argon2 and Bcrypt are solid choices for JavaScript development. Argon2 has the edge in overall health score (61/100), 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 argon2 better than bcrypt?
It depends on your needs. Argon2 has a health score of 61/100 while Bcrypt scores 55/100. Argon2 has more weekly downloads (0), 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, argon2 or bcrypt?
Bcrypt has the smaller gzipped bundle at 2.3 KB. A smaller bundle means faster load times for your users, which can positively impact SEO and user experience.
How many developers use argon2 vs bcrypt?
Based on npm download statistics, Argon2 has approximately 0 weekly downloads and Bcrypt has approximately 0 weekly downloads. These numbers reflect package installations, not unique developers, but they indicate relative adoption levels.
Which is better maintained, argon2 or bcrypt?
Argon2 currently has the higher overall health score at 61/100. Argon2 has a maintenance score of 80/100 and Bcrypt scores 60/100 on maintenance.

Argon2 vs bcrypt: Modern Standard vs Time-Tested Classic

Argon2 and bcrypt are both password hashing algorithms designed to be intentionally slow, making brute-force attacks computationally expensive. bcrypt has been the default recommendation for password hashing since the late 1990s — it's battle-tested, widely understood, and supported in every major programming language. Argon2 is the newer contender, winning the Password Hashing Competition (PHC) in 2015, and is now recommended by OWASP as the preferred password hashing algorithm.

Argon2's key advantage over bcrypt is memory-hardness. bcrypt is CPU-hard — it takes a fixed amount of memory regardless of the cost factor — which means attackers can parallelize bcrypt cracking on GPUs or ASICs relatively efficiently. Argon2 is both CPU-hard and memory-hard: you configure it to use a specific amount of RAM per hash operation, making GPU-based attacks orders of magnitude more expensive because GPUs have limited per-core memory. For high-security applications, Argon2's resistance to hardware-accelerated attacks is a meaningful advantage.

In the Node.js ecosystem, the practical difference comes down to native dependencies. The argon2 npm package requires a C compiler and node-gyp during installation, similar to bcrypt. For serverless deployments where native bindings are problematic, bcryptjs (pure JavaScript bcrypt) is often the path of least resistance. If you can handle native dependencies and want the strongest available password hashing, Argon2id (the hybrid variant) is the 2026 best practice. If you need maximum deployment compatibility or are working with existing bcrypt hashes, bcrypt remains perfectly secure for the foreseeable future.

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