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Libraries.io

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Monitor and search open source packages for security and maintenance insights.

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Tracked since2026
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The Bottom Line

Entry price

Free plan available, paid tiers above

Biggest pro

Free to use for basic package information

Biggest con

Data is scraped from the internet and not validated for accuracy

TL;DR - Libraries.io

  • Monitors over 10 million open source packages across 32 package managers.
  • Provides free access to basic package metadata, license, and dependency insights.
  • Offers a paid Tidelift Subscription for validated, curated data and advanced security features.
Pricing: Free plan available
Best for: Growing teams

What is Libraries.io?

Editorial review
Libraries.io is a free service that aggregates publicly available information on over 10 million open source packages across 32 different package managers. It allows users to search for packages by license, language, or explore new, trending, or popular packages. The platform provides basic package metadata, license data, and limited dependency insights by scraping data from the internet. While Libraries.io offers a broad overview of the open source ecosystem, its data is not validated or curated for accuracy. For users requiring more complete, accurate, and human-validated data for critical decisions regarding open source usage and management, the Tidelift Subscription is offered as a paid alternative. The Tidelift Subscription provides deeper insights, including vulnerability data, maintenance status, and secure development practice attestations, backed by paid maintainer partners. This tool is ideal for developers, researchers, and organizations looking for a quick, free way to discover and get basic information about open source packages. However, for enterprise-grade security, compliance, and risk management, the Tidelift Subscription offers a more robust solution with curated data and additional features.

Available on: Web

how we evaluateSourcelibraries.io ↗

Pros & Cons

Pros

  • Free to use for basic package information
  • Covers a vast number of open source packages and package managers
  • Useful for initial discovery and exploration of open source projects
  • Provides basic insights into package metadata and licenses

Cons

  • Data is scraped from the internet and not validated for accuracy
  • Limited insights compared to paid alternatives
  • Does not include vulnerability insights or maintenance status

Key Features

Search 10.5M+ open source packagesFilter by license and languageExplore new, trending, or popular packagesAPI access (limited and rate restricted)Monitors 32 different package managers

Pricing Plans

Pricing checked Aug 3, 2026

Libraries.io

Free

  • Read from package and source repository metadata, not validated for accuracy
  • Limited insights only, not validated for accuracy
  • Limited and rate restricted API access

The Tidelift Subscription

Contact us

  • Extensive and human-validated for accuracy package metadata
  • Paying maintainers to implement secure development practices and provide attestations
  • Extensive data about practices and attestations made available only to customers
  • Analyzed, and manually validated for accuracy license data, also including normalized SPDX expression
  • Extensive and human-validated for accuracy dependency insights, and including dependency graph relationships
  • CVE data ingested from multiple sources and mapped to specific versions, plus maintainer CVE reviews for impact, workarounds, and false positive identification
  • Extensive and human-validated for accuracy maintenance status, including deprecation, end-of-life, and package rename insights
  • Extensive and human-validated for accuracy release and usage recommendations
Calculate your costView full pricing

Is Libraries.io worth the price?

75/100

The pricing model for Libraries.io is straightforward: a free tier for basic monitoring and a 'Contact us' enterprise solution.

The free tier is generous for individual developers or small projects needing basic insights. The Tidelift Subscription is clearly aimed at large organizations requiring extensive, human-validated data and enterprise-grade support.

Hidden Costs & Gotchas

Enterprise tier requires custom negotiation, potentially high cost.

Free tier has limited API access, rate restrictions.

No transparent pricing for advanced features.

How Libraries.io Compares to Competitors

Compared to Snyk, which offers tiered pricing starting around $25/month for developers and custom enterprise plans, Libraries.io's free tier is more accessible for basic use. However, for comprehensive enterprise solutions, both Snyk and Mend.io (with similar custom pricing) offer robust features, making Tidelift's 'Contact us' tier competitive but lacking transparent pricing for direct comparison.

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Libraries.io FAQ

How does Libraries.io help with open source package discovery?

Libraries.io allows users to search for open source packages based on criteria like license or language. It also enables exploration of new, trending, or popular packages across 32 different package managers, making it useful for initial discovery.

What kind of insights does Libraries.io provide about open source packages?

Libraries.io provides basic package metadata, license data, and limited dependency insights. This information is gathered by scraping publicly available data from the internet.

How is Libraries.io priced?

Libraries.io is available on a free tier, providing access to basic package information. Paid plans are offered for users requiring more extensive usage and additional features.

Which teams would benefit most from using Libraries.io?

Libraries.io is ideal for developers, researchers, and organizations seeking a quick and free method to discover and obtain basic information about open source packages. It serves as a starting point for open source exploration.

How does Libraries.io compare to tools like Grype?

Libraries.io provides broad discovery and basic metadata for over 10 million open source packages. In contrast, tools like Grype typically focus on vulnerability scanning within specific software artifacts, offering a different scope of security analysis.

What are the main limitations of Libraries.io's data?

The data provided by Libraries.io is scraped from the internet and is not validated or curated for accuracy. It also offers limited insights compared to paid alternatives and does not include vulnerability data or detailed maintenance status.

Source: libraries.io

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