Alternatives to Challenges.cloudflare.com

Discover websites similar to Challenges.cloudflare.com based on shared categories, topics, and features.

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openssh.com favicon

Securely connect to remote servers with SSH

92%

OpenSSH offers secure remote login and encrypted connections using SSH, protecting your data and enabling safe server management across networks.

esp32.com favicon

Verify you're human to access the site

91%

This page runs a quick bot check to verify you're a real user before granting access. Enable JavaScript or type OVERRIDE if needed to proceed.

hcaptcha.com favicon

Protect your site from bots with user privacy in mind

87%

hCaptcha is a privacy-focused security tool that helps websites stop bots and online abuse, offering an alternative to reCAPTCHA for user verification.

beyondidentity.com favicon

Eliminate identity threats with passwordless access

87%

Beyond Identity offers a secure access management platform with phishing-resistant MFA, SSO, and passwordless authentication for identity protection.

duo.com favicon

Secure your login with easy multi-factor authentication

85%

Duo Security helps protect your accounts with secure sign-in solutions like multi-factor authentication and single sign-on for businesses of all sizes.

miniorange.com favicon

Secure all your apps with single sign-on and MFA

85%

miniOrange offers unified security tools for identity management, single sign-on, and multi-factor authentication to protect access to all your apps.

secsign.com favicon

Secure your logins with simple 2FA apps

85%

SecSign offers secure two-factor authentication with easy-to-use apps for safer online logins and enhanced protection for your business or personal accounts.

token2.com favicon

Replace app authenticators with secure hardware tokens

83%

Token2 offers secure hardware tokens and FIDO2 keys for easy two-factor authentication, replacing app-based authenticators with physical devices.

ftsafe.com favicon

Secure your identity and payments with trusted devices

83%

FEITIAN offers secure identity and payment solutions, including authentication devices and security tools for businesses and financial services worldwide.

authy.com favicon

Protect accounts with simple 2FA authentication

79%

Authy helps you secure your online accounts with easy-to-use two-factor authentication, adding extra protection beyond passwords. Free app for all devices.

guide.duo.com favicon

Step-by-step Duo 2FA setup and security tips

79%

Learn how to use two-factor authentication with Duo Security. This guide helps you protect your accounts and explains key setup steps for added safety.

fluistr.com favicon

Password-free, one-touch WordPress login

77%

Fluistr lets you add easy, password-free two-factor authentication to your WordPress site, using a plugin and mobile app for secure logins.

upgrade.yubico.com favicon

Get your Yubico API key instantly online

58%

Request and manage your API key for Yubico Web Services. Secure your integrations using Yubico's authentication with a simple online signup process.

account.google.com favicon

Control your Google Account privacy and security

56%

Manage your Google Account to personalize services, set up security, and control privacy settings for a secure and convenient online experience.

onelogin.com favicon

Secure login and access for your team

56%

OneLogin offers secure identity and access management solutions, including single sign-on and multi-factor authentication, for businesses of all sizes.

oneall.com favicon

Add social login to your site in minutes

56%

Connect your website or app with 35+ social networks for easy logins, user management, and secure profile data—all through a simple, unified platform.

secureauth.com favicon

Protect accounts with advanced identity management

56%

SecureAuth provides advanced identity and access management solutions to help businesses protect employee and customer accounts with secure authentication.

saaspass.com favicon

Log in securely with your phone or wearable

56%

SAASPASS lets you log in securely to your PC and apps using multi-factor authentication, dynamic passcodes, and password management on mobile or wearable devices.

itsme-id.com favicon

Verify your identity and sign documents online

56%

itsme® lets you securely verify your identity online, log in to services, confirm transactions, and sign documents—no card reader or complex passwords needed.

beckett.com favicon

Grade, buy, and vault your collectibles

56%

Beckett Collectibles lets you grade, authenticate, buy, sell, price, and securely store trading cards and collectibles, all in one trusted platform.

Top Challenges.cloudflare.com Alternatives (Matching Language)

id.ee favicon

Secure your identity online with Estonian ID tools

98%

ID.ee provides tools and support for secure digital identification, authentication, and electronic signatures, with downloads for Estonian ID software.

webauthn.io favicon

Try WebAuthn authentication in your browser

91%

Test and explore WebAuthn authentication methods in your browser. Register credentials, try advanced settings, and learn about passwordless security online.

canokeys.org favicon

Secure your logins with open-source hardware keys

91%

CanoKeys offers secure, open-source hardware for FIDO2 and WebAuthn authentication, letting you manage resident and normal keys with helpful tools.

getaegis.app favicon

Securely manage 2FA tokens on Android

79%

Aegis Authenticator is a free, open-source Android app to securely manage your 2-step verification tokens for online accounts and boost your account security.

spid.gov.it favicon

Access public services with one secure login

56%

SPID is Italy’s digital identity system that lets you securely access public and private online services with a single login. Available in Italian and English.

d-trust.net favicon

Certified digital identity and trust solutions

54%

D-Trust GmbH offers certified digital identity, authentication, and trust services for secure online transactions, following eIDAS standards (German site).

idp.u.washington.edu favicon

Access UW services with one secure login

51%

Securely sign in with your UW NetID to access University of Washington online services and applications through a single authentication portal.

wolterskluwer.eu favicon

Access Wolters Kluwer services securely

51%

Securely sign in to access Wolters Kluwer's online services and resources through this authentication portal.

login.harvard.edu favicon

Access all Harvard services with one login

51%

Securely sign in to Harvard services using HarvardKey, the university's single sign-on portal for students, faculty, and staff.

supercard.ch favicon

Access your Supercard account securely

51%

Securely log in to your Supercard account to access rewards, manage your profile, and enjoy member benefits in multiple languages.

oauth.net favicon

Explore secure authentication with OAuth

49%

Learn about OAuth, a secure authentication protocol. Find guides, specs, and community resources for safe app access to user data—no passwords needed.

simplesamlphp.org favicon

Add secure authentication to your PHP apps

49%

SimpleSAMLphp lets you add secure authentication to PHP apps with support for SAML, OpenID, and OAuth protocols. Open-source and easy to integrate.

login.xyz favicon

Log in with your Ethereum wallet

49%

Sign-In with Ethereum lets you log into websites using your Ethereum wallet, providing a secure and decentralized way to access online services.

keycloak.org favicon

Add single sign-on to your apps easily

49%

Keycloak is an open source platform for adding secure authentication, single sign-on, and user management to your apps and services with minimal setup.

otp.dev favicon

Add OTP verification with just one API call

49%

Easily add one-time password (OTP) verification to your apps with a simple, multi-channel API. Fast setup, ready-made UI, and developer-friendly tools.

authress.io favicon

Seamless login and access control for your app

49%

Authress offers a simple API for login and access control, giving your software secure authentication and fine-grained, role-based permissions management.

passkeys.dev favicon

Build passwordless logins with passkeys

49%

Discover guides, tools, and resources for integrating passkeys and passwordless authentication in your apps. Ideal for developers building secure logins.

authorizer.dev favicon

Add secure login to your app in minutes

49%

Authorizer is an open-source authentication and authorization tool that lets you easily add secure login, access control, and user management to your apps.

fidoalliance.org favicon

Secure logins without passwords

47%

FIDO Alliance creates free, open authentication standards that help reduce reliance on passwords and improve online security for everyone.

openid.net favicon

Explore open digital identity standards

47%

OpenID Foundation leads the creation of secure, privacy-focused digital identity standards and supports a global community shaping identity solutions.

More Challenges.cloudflare.com Alternatives

old.uid.me favicon

Edit and control your uID profile for easy sign-in

58%

Manage and update your uID profile to access and sign in to websites that support uID authorization. Russian-language profile management tool.

bankid.no favicon

Bruk mobilen som digital legitimasjon

58%

BankID lar deg identifisere deg sikkert på nett og mobilen i Norge, og gir tilgang til offentlige og private tjenester. Norsk identifikasjonstjeneste.

domainkeys.sourceforge.net favicon

Add DomainKeys email authentication easily

56%

Open-source library and tools to help email systems add DomainKeys authentication, supporting secure email delivery and anti-spam protection.

hrvatskitelekom.hr favicon

Access all Telekom services with one secure login

51%

Securely log in to Hrvatski Telekom services using a single sign-on portal that protects your profile and streamlines access across connected platforms.

roularta.be favicon

Access all Roularta services with one login

51%

Securely log in to access Roularta’s online services and manage your account details with a single sign-on platform.

idp.eacat.net favicon

Secure portal for Catalan public services

49%

Access electronic administration services for Catalan public institutions through this secure government portal. Site and services are in Catalan.

indieauth.net favicon

Sign in anywhere with your own domain

49%

IndieAuth lets you sign in to websites using your own domain, offering a decentralized way to verify your identity built on OAuth 2.0 standards.

freeradius.org favicon

Authenticate users across networks securely

49%

FreeRADIUS is a widely used open-source RADIUS server for user authentication, authorization, and accounting, trusted by ISPs and enterprises worldwide.

freeotp.github.io favicon

Secure your logins with one-time passwords

49%

FreeOTP lets you add two-factor authentication to your logins by generating one-time passwords and scanning QR codes for secure access.

digid.nl favicon

Log in securely to Dutch government services

47%

DigiD lets you securely log in to Dutch government and healthcare websites, manage your digital identity, and authorize others to handle your affairs online.

shibboleth.net favicon

Open-source authentication for organizations

47%

Shibboleth Consortium supports open-source software for secure authentication and identity management, keeping access free for organizations worldwide.

magic.link favicon

Add secure wallet login to your app instantly

47%

Magic lets you add secure, seamless blockchain wallet login and authentication to your apps, trusted by millions of users and thousands of developers.

surbl.org favicon

Identify and block suspicious domains easily

38%

SURBL provides reputation intelligence data to help identify and block malicious or suspicious domains, supporting safer email and web experiences.

packetstorm.news favicon

Stay updated with the latest cybersecurity news and tools

36%

Packet Storm offers cybersecurity news, tools, exploits, advisories, and whitepapers for security professionals and enthusiasts to stay updated and informed.

joesecurity.org favicon

Automate deep malware and phishing analysis

34%

Joe Sandbox offers automated malware and phishing analysis tools to help detect, analyze, and respond to digital threats quickly and effectively.

bka.de favicon

Get official crime updates and safety tips in German

30%

Official website of the German Federal Criminal Police Office (BKA) with news, safety tips, crime prevention info, and public records. Site in German.

guardianproject.github.io favicon

Protect your privacy with secure mobile tools

30%

Guardian Project offers privacy-focused apps and tools that help you protect your digital communications and data, with a focus on security and anonymity.

dnsdist.org favicon

Balance DNS traffic and block abuse easily

30%

dnsdist is a DNS load balancer that routes traffic for top performance and blocks abusive requests. Find guides, documentation, and setup help here.

biz.trustdock.io favicon

Verify identities online, fast and securely

29%

TRUSTDOCK offers online identity verification (eKYC) services in Japanese, helping businesses quickly and securely verify users and meet legal compliance.

dpgmedia.nl favicon

Easily manage your privacy settings online

29%

This site helps you manage your privacy and consent preferences for DPG Media websites, giving you control over your personal data and online experience.