Sites like zlib

01 · Entity

About zlib

zlib zlib.net

zlib Home Site

Wikidata: lossless compression library

Top 10K · #4,267 1 technologies Crawled Nov 6, 2026

Visit zlib

Summary by Claude

Official home page of zlib, a free, open-source lossless data compression library implementing the Deflate algorithm, with source downloads, release notes, documentation and related tools.

Who it’s for

Software developers

Business model

None (free open-source project)

• open-source compression library
• Deflate compression
• gzip format
• zlib source download
• minizip
• CRC-32 checksum
• ZIP file processing
• C compression library

02 · Embedding space

Competitor map

Each alternative by how close its vector is to zlib’s (x) and how much traffic it gets, how much of the stack it shares, or where it sits in the embedding space itself (y). Lines split each axis at the median. Hover for the numbers, click to jump to it in the list.

1. 01
   GZIP gzip.org Top 10K English

   The gzip home page

   file format

   • Apache HTTP Server

   0 say GZIP is a good alternative to zlib 0 say GZIP isn’t a real alternative to zlib

   Comment
   Very close cos 0.941
2. 02
   ijg.org Top 10K

   Independent JPEG Group

   C programming language library for JPEG images, from IJG

   • Apache HTTP Server

   0 say ijg.org is a good alternative to zlib 0 say ijg.org isn’t a real alternative to zlib

   Comment
   Very close cos 0.905
3. 03
   7-Zip 7-zip.org Top 10K

   7-Zip

   open-source file archiver and extractor

   • Google Workspace
   • nginx

   0 say 7-Zip is a good alternative to zlib 0 say 7-Zip isn’t a real alternative to zlib

   Comment
   Very close cos 0.904
4. 04
   libpng.org Top 10K

   libpng.org: top level

   • nginx

   0 say libpng.org is a good alternative to zlib 0 say libpng.org isn’t a real alternative to zlib

   Comment
   Very close cos 0.899
5. 05
   Linux kernel kernel.org Top 10K English

   The Linux Kernel Archives

   Unix-like operating system kernel, basis for all Linux operating systems

   • Google Search Console
   • nginx

   0 say Linux kernel is a good alternative to zlib 0 say Linux kernel isn’t a real alternative to zlib

   Comment
   Close cos 0.886
6. 06
   curl curl.se Top 10K English

   curl

   command line tool and library for transferring data with URL syntax

   • Fastly
   • nginx

   0 say curl is a good alternative to zlib 0 say curl isn’t a real alternative to zlib

   Comment
   Close cos 0.883
7. 07
   doxygen.org Top 10K English

   Doxygen homepage

   Source code documentation and analysis tool

   • Bootstrap
   • Cloudflare
   • Cloudflare DNS
   • Cloudflare Web Analytics
   • Google AdSense

   0 say doxygen.org is a good alternative to zlib 0 say doxygen.org isn’t a real alternative to zlib

   Comment
   Close cos 0.882
8. 08
   filezilla-project.org Top 10K English

   FileZilla - The free FTP solution

   FileZilla - The free FTP solution for both client and server. Filezilla is open source software distributed free of charge.

   • Apache HTTP Server
   • Google Search Console

   0 say filezilla-project.org is a good alternative to zlib 0 say filezilla-project.org isn’t a real alternative to zlib

   Comment
   Close cos 0.880
9. 09
   Flaticon flaticon.com Top 10K English

   That request didn't go through. Our security filter flagged something. You don't have permission to access this page.

   database of icons

   • Akamai
   • Amazon SES
   • Google Search Console
   • Google Workspace
   • Mailchimp
   • Zendesk

   0 say Flaticon is a good alternative to zlib 0 say Flaticon isn’t a real alternative to zlib

   Comment
   Close cos 0.880
10. 10
    FreeBSD freebsd.org Top 10K English

    The FreeBSD Project

    free Unix-like operating system

    • Font Awesome
    • Microsoft 365
    • Plausible

    0 say FreeBSD is a good alternative to zlib 0 say FreeBSD isn’t a real alternative to zlib

    Comment
    Close cos 0.878
11. 11
    Debian debian.org Top 1K English

    Debian -- The Universal Operating System

    Debian is an operating system and a distribution of Free Software. It is maintained and updated through the work of many users who volunteer their time and effort.

    • Apache HTTP Server
    • Google Search Console

    0 say Debian is a good alternative to zlib 0 say Debian isn’t a real alternative to zlib

    Comment
    Close cos 0.878
12. 12
    Ollama ollama.com Top 10K

    Ollama · Run AI models locally and in the cloud

    Ollama is the easiest way to run and build with open AI models locally or in the cloud on macOS, Windows, and Linux.

    • Apple Business
    • Cloudflare DNS
    • Google Cloud
    • Google Search Console
    • Google Workspace
    • OpenAI

    0 say Ollama is a good alternative to zlib 0 say Ollama isn’t a real alternative to zlib

    Comment
    Close cos 0.878
13. 13
    FreeTDS.org freetds.org Top 10K

    FreeTDS.org

    • Apache HTTP Server

    0 say FreeTDS.org is a good alternative to zlib 0 say FreeTDS.org isn’t a real alternative to zlib

    Comment
    Close cos 0.876
14. 14
    Hugging Face huggingface.co Top 10K

    Hugging Face – The AI community building the future.

    We’re on a journey to advance and democratize artificial intelligence through open source and open science.

    • Amazon SES
    • Apple Business
    • Amazon CloudFront
    • Google Search Console
    • Google Workspace
    • Mailjet

    0 say Hugging Face is a good alternative to zlib 0 say Hugging Face isn’t a real alternative to zlib

    Comment
    Close cos 0.878
15. 15
    PHP php.net Top 1K English

    PHP

    PHP is a popular general-purpose scripting language that powers everything from your blog to the most popular websites in the world.

    • bunny.net
    • Font Awesome
    • Google Search Console
    • jQuery
    • Matomo

    0 say PHP is a good alternative to zlib 0 say PHP isn’t a real alternative to zlib

    Comment
    Close cos 0.878
16. 16
    Cygwin cygwin.com Top 10K English

    Cygwin

    Unix subsystem for Windows machines

    • nginx
    • NS1

    0 say Cygwin is a good alternative to zlib 0 say Cygwin isn’t a real alternative to zlib

    Comment
    Close cos 0.876
17. 17
    GNU gnu.org Top 1K English

    The GNU Operating System and the Free Software Movement

    Since 1983, developing the free Unix style operating system GNU, so that computer users can have the freedom to share and improve the software they use.

    • Apache HTTP Server

    0 say GNU is a good alternative to zlib 0 say GNU isn’t a real alternative to zlib

    Comment
    Close cos 0.876
18. 18
    Arch Linux archlinux.org Top 10K English

    Arch Linux

    Linux distribution

    • Google Search Console
    • Hetzner DNS
    • nginx

    0 say Arch Linux is a good alternative to zlib 0 say Arch Linux isn’t a real alternative to zlib

    Comment
    Close cos 0.874
19. 19
    sqlite.org Top 10K

    SQLite Home Page

    serverless relational database management system (RDBMS)

    • Google Workspace

    0 say sqlite.org is a good alternative to zlib 0 say sqlite.org isn’t a real alternative to zlib

    Comment
    Close cos 0.873
20. 20
    freetype.org Top 10K English

    The FreeType Project

    The FreeType Project: a free, high-quality and portable Font engine

    • Cloudflare
    • Cloudflare DNS
    • Google Search Console
    • PayPal

    0 say freetype.org is a good alternative to zlib 0 say freetype.org isn’t a real alternative to zlib

    Comment
    Close cos 0.872

Ranked by score: the cosine similarity of each site’s vector to zlib.net’s, less a small penalty for generic sites that are close to everything. Highlighted technologies are ones zlib uses too. Votes and comments come from visitors and don’t change the ranking.

04 · Fingerprints

Technology

What zlib is built with, and what its closest competitors use, from its homepage’s code and its DNS records.