Sites like NTP

01 · Entity

About NTP

NTP ntp.org

NTP: Network Time Protocol

The NTP Project conducts Research and Development in NTP, a protocol designed to synchronize the clocks of computers over a network to a common timebase.

Wikidata: standard protocol for synchronizing time across devices

Top 100 · #86 English 6 technologies Crawled Nov 6, 2026

Visit NTP

Summary by Claude

Home of the NTP Project, which develops and maintains the open source reference implementation of the Network Time Protocol for synchronizing computer clocks, with downloads, documentation, security notices and public time server lists.

Who it’s for

System administrators, network engineers, developers

Business model

Donations

• open source time synchronization
• Network Time Protocol
• NTP reference implementation download
• clock synchronization
• public time servers
• NTP security notices
• NTP documentation
• David Mills reference library

02 · Embedding space

Competitor map

Each alternative by how close its vector is to NTP’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
   ntppool.org Top 10K English

   pool.ntp.org: the internet cluster of ntp servers

   • GlobalSign
   • Google Search Console
   • Fastly
   • Fastmail
   • Google Workspace
   • Meta Business Suite

   0 say ntppool.org is a good alternative to NTP 0 say ntppool.org isn’t a real alternative to NTP

   Comment
   Very close cos 0.918
2. 02
   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 NTP 0 say Syncthing isn’t a real alternative to NTP

   Comment
   Close cos 0.884
3. 03
   Netnod netnod.se Top 10K English

   Start | Netnod

   internet exchange in Sweden

   • Apache HTTP Server
   • Drupal
   • Google Workspace
   • Mailchimp
   • Matomo
   • PHP

   0 say Netnod is a good alternative to NTP 0 say Netnod isn’t a real alternative to NTP

   Comment
   Close cos 0.881
4. 04
   int08h.com Top 10K English

   int08h

   • Google Analytics
   • Google Search Console
   • Fastly
   • Microsoft 365
   • Namecheap DNS

   0 say int08h.com is a good alternative to NTP 0 say int08h.com isn’t a real alternative to NTP

   Comment
   Close cos 0.882
5. 05
   National Institute of Standards and Technology nist.gov Top 1K English

   National Institute of Standards and Technology

   NIST promotes U.S. innovation and industrial competitiveness by advancing measurement science, standards, and technology in ways that enhance economic security and improve our quality of life.

   • Google Search Console
   • Atlassian
   • Bing Webmaster Tools
   • Cloudflare
   • Cloudflare Web Analytics
   • Drupal

   0 say National Institute of Standards and Technology is a good alternative to NTP 0 say National Institute of Standards and Technology isn’t a real alternative to NTP

   Comment
   Close cos 0.881
6. 06
   IETF ietf.org Top 1K English

   IETF | Internet Engineering Task Force

   The Internet Engineering Task Force (IETF) is the premier Internet standards body, developing open standards through open processes.

   • Google Search Console
   • Cloudflare
   • Cloudflare DNS
   • Google Workspace
   • Matomo

   0 say IETF is a good alternative to NTP 0 say IETF isn’t a real alternative to NTP

   Comment
   Close cos 0.870
7. 07
   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 NTP 0 say curl isn’t a real alternative to NTP

   Comment
   Close cos 0.862
8. 08
   NLnet Labs nlnetlabs.nl Top 10K English

   NLnet Labs - Home

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

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

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

   Comment
   Close cos 0.863
9. 09
   Tor Project torproject.org Top 10K English

   Tor Project | Anonymity Online

   Anonymity Online | Defend yourself against tracking and surveillance. Circumvent censorship.

   • Apache HTTP Server
   • Google Search Console
   • Bootstrap
   • Font Awesome
   • jQuery

   0 say Tor Project is a good alternative to NTP 0 say Tor Project isn’t a real alternative to NTP

   Comment
   Close cos 0.857
10. 10
    RFC Editor rfc-editor.org Top 1K English

    RFC Editor

    The official home of RFCs. RFCs outline computer networking and Internet foundations, including Internet Standards and historical or informative content.

    • Google Search Console
    • Cloudflare
    • Cloudflare DNS
    • Google Workspace
    • Nuxt
    • Vue.js

    0 say RFC Editor is a good alternative to NTP 0 say RFC Editor isn’t a real alternative to NTP

    Comment
    Close cos 0.856
11. 11
    Node.js nodejs.org Top 10K English

    Node.js — Run JavaScript Everywhere

    Node.js® is a free, open-source, cross-platform JavaScript runtime environment that lets developers create servers, web apps, command line tools and scripts.

    • Google Search Console
    • Cloudflare
    • Cloudflare DNS
    • Google Workspace
    • Next.js
    • React

    0 say Node.js is a good alternative to NTP 0 say Node.js isn’t a real alternative to NTP

    Comment
    Close cos 0.856
12. 12
    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 NTP 0 say doxygen.org isn’t a real alternative to NTP

    Comment
    Close cos 0.856
13. 13
    NetBird netbird.io Top 10K English

    NetBird - Open Source Zero Trust Networking

    WireGuard®-based overlay network and Zero Trust Network Access in one platform for reliable and secure connectivity

    • Google Search Console
    • Brevo
    • Google Workspace
    • HubSpot
    • Microsoft 365
    • Next.js

    0 say NetBird is a good alternative to NTP 0 say NetBird isn’t a real alternative to NTP

    Comment
    Close cos 0.853
14. 14
    OSF osf.io Top 10K English

    OSF

    tools that make open science practice easier

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

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

    Comment
    Close cos 0.855
15. 15
    WorldTimeServer.com worldtimeserver.com Top 10K English

    WorldTimeServer.com: Current Local Time and Date in any Zone

    World Time Server shows current local time and date in cities and countries in all time zones, adjusted for Daylight Saving Time rules automatically.

    • Google Analytics
    • Google Fonts
    • Google Search Console
    • Cloudflare
    • Cloudflare DNS
    • Google Workspace

    0 say WorldTimeServer.com is a good alternative to NTP 0 say WorldTimeServer.com isn’t a real alternative to NTP

    Comment
    Close cos 0.853
16. 16
    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.

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

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

    Comment
    Close cos 0.854
17. 17
    Tuta tuta.com English

    Tuta: Turn ON privacy for free with secure emails, calendars & contacts | Tuta

    Tuta guarantees your data stays private for free & without ads. Quantum-resistant encryption makes Tuta the best secure technology solution to protect your privacy.

    • Astro
    • Amazon Route 53

    0 say Tuta is a good alternative to NTP 0 say Tuta isn’t a real alternative to NTP

    Comment
    Close cos 0.851
18. 18
    Mysterium mysterium.network Top 10K English

    Open Web Protocol - Mysterium Network

    An open-source ecosystem of protocols, tools and infrastructure to liberate the web. Our node network empowers both builders and users to access free information.

    • Google Search Console
    • Cloudflare DNS
    • Google Cloud
    • Google Workspace
    • Intercom
    • Lodash

    0 say Mysterium is a good alternative to NTP 0 say Mysterium isn’t a real alternative to NTP

    Comment
    Close cos 0.849
19. 19
    Calendly calendly.com Top 1K English

    Meeting Scheduling Software and AI Meeting Tools | Calendly

    Calendly connects and simplifies all of the work around meetings, from scheduling, payments, and meeting prep to notetaking, contact management, and follow-up.

    • Google Search Console
    • Adobe
    • Apple Business
    • Astro
    • Atlassian
    • Cloudflare

    0 say Calendly is a good alternative to NTP 0 say Calendly isn’t a real alternative to NTP

    Comment
    Close cos 0.851
20. 20
    inria.fr Top 10K English

    Making sure you're not a bot!

    French research institution in computer science

    • Apple Business

    0 say inria.fr is a good alternative to NTP 0 say inria.fr isn’t a real alternative to NTP

    Comment
    Close cos 0.851

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

04 · Fingerprints

Technology

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