
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.

Cloudsmith
Artifactory
CloudRepo
Gemfury
Sonatype Nexus Repository
jFrog
fpm
Free hosted Node.js, Debian, RPM, Java, Python and RubyGem repositories. Chef, Puppet, Jenkins, Buildkite, CircleCI and Travis CI integrations.

Which is more popular?
packagecloud might be a bit more popular than ALTCHA. We know about 5 links to it since March 2021 and only 4 links to ALTCHA.
Website, pricing, platforms and company facts side by side.
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| Website | altcha.org | packagecloud.io |
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| Company | — | 2016 |
| 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...
Packagecloud is a cloud-based package repository that allows its users to host npm, python, rubygem, apt, Java/Maven, and yum repositories without having to configure anything first. Being a cloud-based solution, it also allows one to distribute various software packages in a uniform, scalable,...
What each product offers, as listed by its team.


How often each product is chosen within a category, 0–100% relative to the other.


As answered by people managing ALTCHA and packagecloud.
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.
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.
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.
Share your experience with using ALTCHA and packagecloud. For example, how are they different and which one is better?
External articles and on-site reviews we used to compare the two products.


We have no reviews of ALTCHA yet. Be the first one to post
Packagecloud is a cloud-based package repository that allows its users to host npm, python, rubygem, apt, Java/Maven, and yum repositories without having to configure anything first. Being a cloud-based solution, it...
Recommendations tracked on public social media and blogs since March 2021.


ALTCHA won on the boring things. It is open source, self-hosted and collects nothing, and it ships official libraries in both Go and PHP, the two languages our two layers already speak. So the same protocol runs twice on every store, by... - Source: dev.to / 15 days ago
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 / 5 months ago
Here's how PoW works for form protection (using the ALTCHA wire format):. - Source: dev.to / 7 months ago
Looks like the repository on packagecloud.io don't have the latest version yet, it only lists 0.0.23? I got 0.0.24 from somewhere though. Source: almost 4 years ago
Forcing the config can be don manually by modifying the config files that points to different repos in /etc/apt/sources.list.d, or for packages on packagecloud.io, you can use the method that I describe. The latter works because... Source: about 4 years ago
The error you are seeing is because you probably ran one of the steps that creates a configuration in your system that points to packagecloud.io, so that your system can retrieve packages from https://packagecloud.io/cs50/repo. However... Source: about 4 years ago
When comparing ALTCHA and packagecloud, you can also consider the following products.

reCAPTCHA is a free security service that protects your websites from spam and abuse.
Compare reCAPTCHA to ALTCHA or packagecloud:

Cloudsmith is the preferred software platform for securely storing and sharing packages and containers. We have distributed millions of packages for innovative companies around the world.
Compare Cloudsmith to ALTCHA or packagecloud:

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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The world’s most advanced repository manager.
Compare Artifactory to ALTCHA or packagecloud:

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

Public and Private Maven and Python (PyPi) repository package manager.
Compare CloudRepo to ALTCHA or packagecloud: