
Brave
Google Chrome
Mozilla Firefox
Vivaldi
Safari
Tor Browser
Chromium
Opera is a browser with innovative features, speed and security.

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.

Which is more popular?
Based on our record, Opera should be more popular than ALTCHA. It has been mentioned 23 times since March 2021.
Website, pricing, platforms and company facts side by side.
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|---|---|---|
| Website | opera.com | altcha.org |
| Pricing | โ | |
| Platforms | โ | |
| Company | Startup from Norway | โ |
| Listed in |
In their own words, as submitted to SaaSHub.


No description of Opera yet.
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...
What each product offers, as listed by its team.


Possible disadvantages
An editorial look at what each product does well and who it suits.


Overall verdict
Why this product is good
Recommended for
No analysis of ALTCHA yet.
Walkthroughs and reviews on video.
Opera VPN Review: Walkthrough, Speed Test (and ๐ฉ#1 Weakness ๐ฉ)
More videos
No ALTCHA videos yet. You could help us improve this page by suggesting one.
How often each product is chosen within a category, 0โ100% relative to the other.


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


Both Opera and Brave support a wide range of extensions, but with Opera, youโll require fewer third-party extensions as most features are in-built.
Opera VPN: Opera VPN is a premium ad blocker that also includes a VPN service. It costs $3.99 per month or $39.99 per year.
Opera is the fifth most popular web browser; it currently holds 2.4% of the web browser market share. It was released in 1995 by Opera. So, it is one of the oldest web browsers which is still actively developed. The...
We have no reviews of ALTCHA yet. Be the first one to post
Recommendations tracked on public social media and blogs since March 2021.


This is not opera.com it's "api2 dot com" so it's a malware site posing as an opera one by including opera in its name. I had a popup like this. It opened every time I opened the browser. Turned out it was coming from a video downloader... Source: over 3 years ago
The opera.com domain is banned where I live but I still want to download the browser without a VPN (because those are also banned). Is there a torrent link or an alternative/mirror link where I can download the latest Opera One release?... Source: over 3 years ago
Apparently it "urgently needed to be removed off the network" (bullshit, you could've blocked opera.com, dumbass) I don't see why its so bad to have one kid with an unmanaged browser, like seeing "your browser is managed by your... Source: over 3 years ago
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 / about 1 month 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 / 6 months ago
Here's how PoW works for form protection (using the ALTCHA wire format):. - Source: dev.to / 8 months ago
When comparing Opera and ALTCHA, 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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Google Chrome is a fast, secure, and free web browser, built for the modern web. Give it a try on your desktop today.
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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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Get the browsers that put your privacy first โ and always have
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Cloudflare's service for any company to replace CAPTCHAs and deliver a better experience to web visitors.
Compare Cloudflare Turnstile to Opera or ALTCHA: