
reCAPTCHA
hCaptcha
Cloudflare Turnstile
Akismet
Private Captcha
mosparo
Cap Captcha
ALTCHA is a free CAPTCHA alternative that uses a proof-of-work mechanism to protect your website, and online services from spam.

Intruder
Qualys
Pentest-Tools
Detectify
Acunetix
SecApps
HackerTarget.com
Online vulnerability scanner for servers, networks, and web applications.

Which is more popular?
Based on our record, HostedScan.com should be more popular than ALTCHA. It has been mentioned 5 times since March 2021.
Website, pricing, platforms and company facts side by side.
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| Website | altcha.org | hostedscan.com |
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| Listed in |
In their own words, as submitted to SaaSHub.


ALTCHA uses a proof-of-work mechanism to protect your website, APIs, and online services from spam and unwanted content. Unlike other solutions, ALTCHA is free, open-source and self-hosted, without external services, does not use cookies nor fingerprinting, does not track users, and is fully...
HostedScan Security provides automated vulnerability scanning for any business. Run industry-standard vulnerability scans for your servers, networks, and web applications. Manage your vulnerabilities with dashboards, reporting, and alerts when new risks are found. Setup scheduled and...
What each product offers, as listed by its team.


Walkthroughs and reviews on video.
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HostedScan.com vulnerability scans demo
How often each product is chosen within a category, 0–100% relative to the other.


As answered by people managing ALTCHA and HostedScan.com.
ALTCHA's answer
What makes ALTCHA unique is that it is free, open-source and self-hosted, without external services, does not use cookies nor fingerprinting, does not track users, and is fully compliant with GDPR. Unlike other captcha solutions, ALTCHA does not require users to solve puzzles or captchas and uses a proof-of-work mechanism instead.
HostedScan.com's answer:
We use industry standard, open source tools, to help you automate your security screening. We aim to be affordable and easily accessible for all businesses to use.
ALTCHA's answer
Our primary audience for ALTCHA Forms includes enterprises, medium and small businesses, non-profits, and individuals who need a reliable, secure, and compliant solution for data collection and management. Whether you're a large corporation dealing with extensive regulatory requirements, a small business looking to protect customer and employee data, a non-profit organization managing sensitive information, or an individual seeking robust data security, ALTCHA Forms provides the tools and features necessary to meet your needs. With a focus on compliance, user-friendly design, and advanced security measures, our platform is tailored to support diverse users in navigating complex regulatory landscapes and ensuring data protection.
HostedScan.com's answer:
We serve small customers securing their company's website, to large multi-national companies scanning across hundreds of subsidiaries to manage help them manage their security risks.
ALTCHA's answer
Here are some key reasons why a person should choose ALTCHA over its competitors:
So in summary, ALTCHA's privacy compliance, open design, accessibility, machine compatibility and modern approach give it clear advantages over competing captcha solutions.
ALTCHA's answer
JavaScript and Svelte.
Share your experience with using ALTCHA and HostedScan.com. For example, how are they different and which one is better?
Recommendations tracked on public social media and blogs since March 2021.


The captcha on orkestr is Altcha. Self-hosted, no third-party JS, no Google, no behavioral tracking. Users don't see a puzzle. There's a single checkbox and a quiet "verifying..." while the browser does some math. About a second, total. - Source: dev.to / 4 months ago
Here's how PoW works for form protection (using the ALTCHA wire format):. - Source: dev.to / 6 months ago
Go based, similar to JS based ALTCHA https://altcha.org/ discussed at https://news.ycombinator.com/item?id=43971068. - Source: Hacker News / 10 months ago
My first reaction when reading was to suggest GRC Shields UP! Or maybe give hostedscan.com a try... But maybe your looking for something like Greenbone. Source: over 3 years ago
Looking for a little guidance, we have a preproduction site we are testing and hostedscan.com OWASP ZAP active states that some SQL Injection may be possible. Our current developer believes this may be a false positive. I want some help... Source: over 3 years ago
HostedScan Security | https://hostedscan.com/ | Full Stack Engineer | Contract or Full time,. - Source: Hacker News / over 3 years ago
When comparing ALTCHA and HostedScan.com, you can also consider the following products.

reCAPTCHA is a free security service that protects your websites from spam and abuse.
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Intruder is a security monitoring platform for internet-facing systems.
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Do you use a captcha to keep out bots? hCaptcha is a drop-in replacement for reCAPTCHA that earns website owners money and helps companies get their data labeled.
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Qualys helps your business automate the full spectrum of auditing, compliance and protection of your IT systems and web applications.
Compare Qualys to ALTCHA or HostedScan.com:

Cloudflare's service for any company to replace CAPTCHAs and deliver a better experience to web visitors.
Compare Cloudflare Turnstile to ALTCHA or HostedScan.com:

Pentest-Tools.com is your ready-to-use setup for security testing
Compare Pentest-Tools to ALTCHA or HostedScan.com: