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Life & fun · alternatives · 2026

24 alternatives to Caido, a lightweight web security auditing toolkit

Hi HN! I’m Emile, co-founder of Caido [0]. Today, we are launching the public beta of Caido, a lightweight web security auditing toolkit. While our tool is mostly geared toward pentesters and bug bounty hunters, we thought some of you might find it useful. The web security auditing toolkit space hasn't seen much innovation in recent years, with current tools feeling outdated and lacking in performance and user experience. As the number of security professionals continues to increase, there is a growing need for a user-friendly alternative. This is what motivated us to create Caido. At its…

Caido is a lightweight web security auditing toolkit designed for penetration testers and bug bounty hunters. It functions as a proxy between users and target systems, enabling traffic recording and filtering, request… Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Caido, a lightweight web security auditing toolkit launched in 2023; newer entries below may have overtaken it.

  1. 1

    Yes, it's open source: https://github.com/lissy93/web-check :) Why I'm building this? There are a lot of tools out there for discovering meta and security data relating to a website, IP or server. But currently, there isn't anything that does everything, all in one place and without a paywall/ user sign up. It's still a WIP, and I'm working on a new version, with some more comprehensive checks, so any feedback would be much appreciated :)

    2024 · v1.web-check.xyz · its alternatives →

  2. 2

    The AI-powered AppSec platform that identifies vulnerabilities with comprehensive penetration tests and provides actionable remediation insights.

    2024 · beaglesecurity.com · its alternatives →

  3. 3
    SEO Audit▲320

    A simple, beautiful SEO audit tool that tells all you need

    2017 · maaxmarket.com · its alternatives →

  4. 4AS

    Hey all, Last time when we were on HackerNews [1], we received a lot of feedback, and we incorporated most of it. - We have changed our name from grep.help to usegrasp.com - A privacy policy page - Bulk import - Pricing page We are happy to introduce a new feature: a personalized answer search engine that provides direct citations to the content on the page. Demo: https://usegrasp.com/search?q=is+starship+fully+reusable%3F 1 - https://news.ycombinator.com/item?id=35510949

    2023 · usegrasp.com · its alternatives →

  5. 5

    Audit your site for improved SEO and conversions!

    2018 · cognitiveseo.com · its alternatives →

  6. 6

    Security for modern teams running software

    2017 · templarbit.com · its alternatives →

  7. 7CC

    If you had to build a context window manager in 24h, would you stick to the existing model or come up with something better? Here's what I did: 1. Built a proxy that intercepts Codex's calls to OpenAI and rewrites them on the fly. 2. Replayed 3,807 rounds of SWE-bench Verified traces through it: avg prompt 44k → 6k tokens (-87%). 3. Posted it to HN to get the next reduction applied to my confidence interval — starting with the inevitable "How about accuracy?" npx -y pando-proxy · github.com/human-software-us/pando-proxy

    Apr 2026 · npmjs.com · its alternatives →

  8. 8

    The easiest way to analyse your website & dominate the SERPs

    2023 · its alternatives →

  9. 9

    I've built this to make it easy to host your own infra for lightweight VMs at large scale. Intended for exec of AI-generated code, for CICD runners, or for off-chain AI DApps. Mainly to avoid Docker-in-Docker dangers and mess. Super easy to use with CLI / Python SDK, friendly to AI engs who usually don't like to mess with VM orchestration and networking too much. Defense-in-depth philosophy. Would love to get feedback (and contributors: clear & exciting roadmap!), thx

    2025 · github.com · its alternatives →

  10. 10

    Hey HN! I'm excited to share a tool I've been working on - a native Hacker News reader built with Rust and egui. Here's a screenshot: https://github.com/haojiang99/hacker_news_reader/blob/main/s.... As a daily HN reader, I've always struggled with keeping track of interesting posts I want to read later. Browser tabs pile up, bookmarks get forgotten, and I lose track of what I've already read. I needed a way to: 1. Browse HN efficiently (across all sections - hot, new, show, ask, jobs, best) 2. Quickly mark posts as "todo" for later reading 3. Mark posts as…

    2025 · github.com · its alternatives →

  11. 11PP

    Hey HN, I've been working on an intercepting proxy for penetration testing over the last few years in my spare time. Some points of difference from the existing tools: * The UIs are built using the native platform frameworks, meaning they look and behave like other applications on the desktop. * It has a fully embedded and integrated Python scripting engine. * It’s fully native meaning it’s nicer on system resources. * It has a number of built in scripts to automate reconnaissance, content discovery, authorisation checks, etc. * The core of it is open source. I'm really keen to get any…

    2023 · pakikiproxy.com · its alternatives →

  12. 12

    Deploy tiny traps to detect hackers and breaches

    2015 · canarytokens.org · its alternatives →

  13. 13

    Hi HN! We kept seeing devs get pwned through MCP tools in ways that security scanners completely miss. So we built an open-source analyzer to catch these attacks. Our first OSS by Mighty team. The problem: At Defcon, we saw MCP exploits with 100% success rate against Claude and Llama. Three attack patterns: Hidden Unicode in "error messages" - Paste a colleague's error into Claude, your SSH keys get exfiltrated Trusted tool updates - That database tool you've used for months? Last week's update added credential theft Tool redefinition - Malicious tool redefines "deploy to prod" to run…

    2025 · github.com · its alternatives →

  14. 14

    This is a simple single-file python program that can find basic XSS (cross-site scripting) vulnerabilities in a target url. Most XSS discovery tools use a payload refelection strategy in which payloads are injected in url parameters and the GET response is inspected for places where the payload content is reflected. This is a very low precision XSS detection strategy because most reflection does not support execution. This program uses a different approach, and instead opens the target url in a browser, tests alert(...) payloads directly in the browser context, and listens for an alert being…

    2024 · github.com · its alternatives →

  15. 15

    Hi HN! We’re Ethan and Danny, the authors of Tangent (https://github.com/telophasehq/tangent), a Rust-based log pipeline where all normalization, enrichment, and detection logic runs as WASM plugins. We kept seeing the same problems in the OCSF (https://ocsf.io) community: 1) Schemas change constantly. Large companies have whole teams dedicated to keeping vendor→OCSF mappings up to date. 2) There’s no shared library of mappings, so everyone recreates the same work. 3) Writing mappers is tedious, repetitive work. 4) Most pipelines use proprietary DSLs that are…

    Nov 2025 · github.com · its alternatives →

  16. 16

    This is a small PoC Python project for web server access logs analyzing to classify and dynamically block bad bots, such as L7 (application-level) DDoS bots, web scrappers and so on. We'll be happy to gather initial feedback on usability and features, especialy from people having good or bad experience wit bots. *Requirements* The analyzer relies on 3 Tempesta FW specific features which you still can get with other HTTP servers or accelerators: 1. JA5 client fingerprinting (https://tempesta-tech.com/knowledge-base/Traffic-Filtering-b...). This is a HTTP and TLS layers…

    2025 · github.com · its alternatives →

  17. 17JR

    Hello Hacker News! We’re Willem, Roeland, Felix and Madeline from Aikido Security (https://aikido.dev/) We’re building a “no BS’ application security platform. It’s the platform we wish existed, but couldn’t find. Willem, our CTO had to manage (application) security at many of his previous startups, and honestly, hated it. Most security tools we had to use made us feel dumb. They were super complex and riddled with false positives. Their platform was behind the book a demo button. They had intransparent pricing models and honestly charged us way too much. We think most of…

    2024 · its alternatives →

  18. 18

    World's Largest Exploit Database

    2023 · exploit.observer · its alternatives →

  19. 19

    The WordPress SEO Audit tool with inline editing

    Jan 2026 · its alternatives →

  20. 20

    Live extension analysis: Point us at a Chrome/Edge/Firefox extension (store URL or CRX). We spin up a safe sandbox and observe it in real time—permissions use, message passing, storage writes, network calls, remote code loading, and UI injections. Package scanning: Paste an npm/package URL or code. We do quick static + dynamic checks: install/postinstall scripts, obfuscation/eval, exfil endpoints, suspicious APIs, and typosquat/reputation signals. AI explainer: An LLM summarizes the behaviors and risk patterns in plain English (why it’s risky, what to verify,…

    2025 · browsertotal.com · its alternatives →

  21. 21

    Online automated vulnerability scanner to secure firewalls, servers, web applications, and apis. Try 14 days for free.

    2020 · hostedscan.com · its alternatives →

  22. 22WS

    http://webscanner.tk/quickscan/ Hi! I made this project over the couse of a week to help teach myself more about Django and web app development. I am studying computer security in school and web security is one of my passions. It is a tool that helps web developers ensure that they have implemented helpful security mechanisms like HTTPOnly flags, X-Frame-Options, etc. There are hundreds of tools that offer to scan websites for things like cross-site scripting, mySQL injection, etc. This tool simply looks for information that is available via one or two GET requests (the headers, protocols,…

    2013 · webscanner.tk · its alternatives →

  23. 23

    Web 3 Security!

    2025 · linkedin.com · its alternatives →

  24. 24

    Get immediate suggestions on technical SEO

    2025 · its alternatives →

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Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →