Best CloudFrunt Alternatives & Competitors in 2026

DNSAudit.io

Free DNS security scanner that checks domains for misconfigs and exposure.

S3Scanner

S3Scanner is an open-source tool that scans S3 buckets across S3-compatible APIs to identify misconfigurations and security vulnerabilities.

CorsMe

CorsMe is a specialized scanner that identifies Cross-Origin Resource Sharing (CORS) misconfigurations in web applications and provides remediation recommendations.

mass-s3-bucket-tester

A Python tool that tests multiple AWS S3 buckets for security misconfigurations including directory listing and upload permissions.

kicks3

A security tool for discovering S3 bucket references in web content and testing buckets for misconfigurations.

s3_objects_check

A security tool that performs whitebox evaluation of S3 object permissions to identify publicly accessible files and generate reports on potential exposure risks.

Sucuri Website Malware Scanner

Website malware scanner with remote & server-side scanning capabilities

CyberChecker

Automated web vulnerability scanner with 60+ security checks

Perisai Web Scanner

Automated web scanner detecting vulnerabilities and HTTP security headers

Email Security Test by ImmuniWeb

A free online tool that tests email server security by evaluating server configurations

Website Privacy Test

Website privacy and security testing tool for cookie and third-party analysis

ImmuniWeb SSL Test

AI-powered platform for SSL/TLS security testing and compliance assessment

Guardian360 Quickscan WP Plugin

WordPress plugin for website security scanning via the Guardian360 API.

KICS

KICS is an open-source Infrastructure as Code security scanner that detects vulnerabilities and misconfigurations through customizable queries and integrates with CI/CD pipelines.

check-my-headers

A Node.js tool that analyzes HTTP security headers on websites to identify missing or problematic security configurations.

ssh-audit by jtesta

ssh-audit is a Python-based tool for auditing SSH server and client configurations to identify security weaknesses and ensure compliance with best practices.

tfsec to Trivy Migration

tfsec is being replaced by Trivy, a more comprehensive open-source security solution

ASH - The Automated Security Helper

ASH is an automated security scanning tool that integrates multiple open-source security scanners to perform preliminary security checks on code, infrastructure, and IAM configurations during development.

CFRipper

CFRipper is a security analyzer for AWS CloudFormation templates that identifies vulnerabilities and misconfigurations before cloud deployment.

Terrascan

Terrascan is a static code analyzer that scans Infrastructure as Code for security misconfigurations and compliance violations across multiple cloud platforms and container environments.

CORSy

A Python-based command-line tool that scans websites for CORS misconfigurations by analyzing HTTP response headers to identify potential security vulnerabilities.

CORStest

A security scanner that identifies Cross-Origin Resource Sharing (CORS) misconfigurations in web applications to detect potential vulnerabilities.

Dalfox

Dalfox is an open-source automated XSS scanner that provides customizable scanning profiles and detailed reporting for cross-site scripting vulnerability detection.

XSSwagger

A specialized scanner that detects XSS vulnerabilities in older versions of Swagger-ui implementations.

s3cario

S3cario is an AWS S3 bucket security testing tool that validates permissions and identifies potential vulnerabilities through scenario simulation.

WPSpider

A centralized dashboard for running and scheduling WordPress scans powered by wpscan utility.

second-order

Second-order subdomain takeover scanner

RoboShadow OWASP ZAP Vulnerability Scanner

Web app & network vulnerability scanner integrating OWASP ZAP, Shodan & Nmap

Jsmon 2.0

JavaScript security scanner for detecting vulnerabilities in third-party scripts

Aikido EOL Scanner

Detects end-of-life and outdated software in code and containers

Intruder XSS Scanner

XSS vulnerability scanner for web apps and APIs with automated scanning

CyCognito Active Security Testing

Automated active security testing platform for external attack surfaces

CHEQ Form Guard

Protects web forms from bots and fake users to prevent junk leads

Verisys Antivirus API

REST API service for scanning files/URLs for malware, viruses & NSFW content.

OpenDoor

Open-source CLI platform for web recon, dir discovery & subdomain enum.

LinksDumper

LinksDumper extracts links and endpoints from HTTP responses to support web application security testing and reconnaissance activities.

Bitdefender Link Checker

Free URL scanner that checks links for malware, phishing, and fraud threats

RoboShadow Mobile Network Scanner

Android app for scanning networks to identify security vulnerabilities

Cloudmersive Virus Scan

Cloud-based virus scan APIs for securing files, URLs, and content uploads with advanced anti-virus and malware scanning capabilities.

NMAP

Nmap is an essential network scanning tool used for network security auditing and status monitoring.

Dnscan

Dnscan is a DNS reconnaissance tool that performs DNS scans, DNS cache snooping, and DNS amplification attack detection.

Pagodo

Automate Google Hacking Database scraping and searching with Pagodo, a tool for finding vulnerabilities and sensitive information.

Spoofcheck

Simple script to check a domain's email protections and identify vulnerabilities.

Yasuo

A Ruby script that scans networks for vulnerable third-party web applications and front-ends with known exploitable security flaws.

RustScan

Fast, smart, effective port scanner with extensive extendability and adaptive learning.

Nipper-ng

A next-generation network scanner for identifying security configuration weaknesses in devices like routers, firewalls, and switches.

ssh-audit by arthepsy

A tool for SSH server auditing with comprehensive analysis capabilities.

CryptoLyzer

CryptoLyzer is a cryptographic protocol analyzer that examines TLS, SSL, SSH, and DNSSEC server implementations with fingerprinting capabilities and multiple output formats.