Sites like PCRE

01 · Entity

About PCRE

PCRE pcre.org

PCRE - Perl Compatible Regular Expressions

The PCRE library is a set of functions that implement regular expression pattern matching using the same syntax and semantics as Perl 5. PCRE has its own native API as well as a set of wrapper functions that correspond to the POSIX regular expression API.

Top 10K · #4,592 English 1 technologies Crawled Nov 6, 2026

Visit PCRE

Summary by Claude

Project site for PCRE and PCRE2, a free open-source C library implementing Perl 5 compatible regular expression pattern matching, with a native API and POSIX wrapper functions, plus downloads, ports and documentation.

Who it’s for

Software developers and open source projects

Business model

None (free open source)

• open source software library
• regular expression library
• PCRE2
• Perl compatible regex
• POSIX regex API
• C library
• pattern matching
• regex documentation

02 · Embedding space

Competitor map

Each alternative by how close its vector is to PCRE’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
   Perl perl.org Top 10K English

   The Perl Programming Language - www.perl.org

   The Perl Programming Language at Perl.org. Links and other helpful resources for new and experienced Perl programmers.

   • Bootstrap
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   • GlobalSign
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   • Google Search Console

   0 say Perl is a good alternative to PCRE 0 say Perl isn’t a real alternative to PCRE

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2. 02
   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 PCRE 0 say PHP isn’t a real alternative to PCRE

   Comment
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3. 03
   Cygwin cygwin.com Top 10K English

   Cygwin

   Unix subsystem for Windows machines

   • nginx
   • NS1

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

   Comment
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4. 04
   Syncthing syncthing.net Top 10K English

   Syncthing

   open source continuous file synchronization software

   • Bootstrap
   • cdnjs
   • Fastly
   • Font Awesome
   • GitHub Pages
   • Hetzner DNS

   0 say Syncthing is a good alternative to PCRE 0 say Syncthing isn’t a real alternative to PCRE

   Comment
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5. 05
   PostgreSQL postgresql.org Top 10K English

   PostgreSQL: The world's most advanced open source database

   The official site for PostgreSQL, the world's most advanced open source database

   • nginx
   • Font Awesome
   • Google Search Console

   0 say PostgreSQL is a good alternative to PCRE 0 say PostgreSQL isn’t a real alternative to PCRE

   Comment
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6. 06
   CPAN cpan.org Top 10K English

   The Comprehensive Perl Archive Network - www.cpan.org

   Perl package repository

   • Apache HTTP Server
   • Fastly
   • GlobalSign
   • Google Analytics
   • Google Search Console

   0 say CPAN is a good alternative to PCRE 0 say CPAN isn’t a real alternative to PCRE

   Comment
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7. 07
   Linux kernel kernel.org Top 10K English

   The Linux Kernel Archives

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

   • nginx
   • Google Search Console

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

   Comment
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8. 08
   curl curl.se Top 10K English

   curl

   command line tool and library for transferring data with URL syntax

   • nginx
   • Fastly

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

   Comment
   Close cos 0.865
9. 09
   Creative Commons creativecommons.org Top 1K English

   Building tools for shared knowledge - Creative Commons

   family of public copyright licenses for allowing free use of a work

   • Cloudflare
   • Cloudflare DNS
   • Google Analytics
   • Google Workspace
   • Microsoft 365
   • PHP

   0 say Creative Commons is a good alternative to PCRE 0 say Creative Commons isn’t a real alternative to PCRE

   Comment
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10. 10
    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 PCRE 0 say doxygen.org isn’t a real alternative to PCRE

    Comment
    Close cos 0.866
11. 11
    OSF osf.io Top 10K English

    OSF

    tools that make open science practice easier

    • Google Cloud DNS
    • Google Search Console
    • Mailchimp
    • Mailgun
    • Mailchimp Transactional

    0 say OSF is a good alternative to PCRE 0 say OSF isn’t a real alternative to PCRE

    Comment
    Close cos 0.866
12. 12
    NLnet Labs nlnetlabs.nl Top 10K English

    NLnet Labs - Home

    Research & Development, Internet architecture, DNS, Routing, Stability and Security.

    • nginx
    • Adobe Fonts
    • Bootstrap
    • Font Awesome
    • Google Workspace
    • jQuery

    0 say NLnet Labs is a good alternative to PCRE 0 say NLnet Labs isn’t a real alternative to PCRE

    Comment
    Close cos 0.864
13. 13
    GZIP gzip.org Top 10K English

    The gzip home page

    file format

    • Apache HTTP Server

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

    Comment
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14. 14
    Codeberg e.V. codeberg.org Top 10K English

    Codeberg.org

    Codeberg is a non-profit community-led organization that aims to help free and open source projects prosper by giving them a safe and friendly home.

    0 say Codeberg e.V. is a good alternative to PCRE 0 say Codeberg e.V. isn’t a real alternative to PCRE

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15. 15
    Drupal drupal.org Top 10K English

    Client Challenge

    free and open-source web content management system

    • Amazon SES
    • Atlassian
    • Fastly
    • GlobalSign
    • Google Search Console
    • Mailchimp

    0 say Drupal is a good alternative to PCRE 0 say Drupal isn’t a real alternative to PCRE

    Comment
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16. 16
    United States Copyright Office copyright.gov Top 10K English

    U.S. Copyright Office | U.S. Copyright Office

    Copyright Office Homepage

    • Adobe Experience Platform Tags
    • Amazon SES
    • Bootstrap
    • Cloudflare
    • Cloudflare DNS
    • Font Awesome

    0 say United States Copyright Office is a good alternative to PCRE 0 say United States Copyright Office isn’t a real alternative to PCRE

    Comment
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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 PCRE 0 say GNU isn’t a real alternative to PCRE

    Comment
    Close cos 0.861
18. 18
    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 PCRE 0 say freetype.org isn’t a real alternative to PCRE

    Comment
    Close cos 0.859
19. 19
    OpenRouter openrouter.ai Top 10K English

    OpenRouter

    The unified interface for every model. Find the best models & prices for your prompts

    • Amazon SES
    • Apple Business
    • Clerk
    • Cloudflare
    • Cloudflare DNS
    • Cloudflare Web Analytics

    0 say OpenRouter is a good alternative to PCRE 0 say OpenRouter isn’t a real alternative to PCRE

    Comment
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20. 20
    bioRxiv biorxiv.org Top 10K English

    bioRxiv.org - the preprint server for Biology

    bioRxiv - the preprint server for biology, operated by openRxiv, a nonprofit organization dedicated to advancing scientific communication

    • Cloudflare
    • Cloudflare DNS
    • Drupal
    • Font Awesome
    • Google Analytics
    • Google Search Console

    0 say bioRxiv is a good alternative to PCRE 0 say bioRxiv isn’t a real alternative to PCRE

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

04 · Fingerprints

Technology

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