Free / Open-sourceAI content detection and a full writing toolkit in one place
Free / Open-sourceAI content detection and a full writing toolkit in one place
Protectstar: Delivers endpoint security and data erasure tools, but lacks web-based bot detection and challenge features. hCaptcha records 5,446,045 monthly visits with +18.7% month-over-month growth and Freemium, Free Trial, Contact for Pricing, Free pricing. Protectstar records 115,023 monthly visits with -27.7% growth and Paid pricing.
AI-driven privacy and security apps for phones, desktops and servers
| Dimension / Metric | ![]() | |
|---|---|---|
| Official Domain | hcaptcha.com | protectstar.com |
| Pricing Model | Freemium, Free Trial, Contact for Pricing, Free | Paid |
| Monthly Visits | 5.45M (5,446,045) | 115.02K (115,023) |
| MoM Traffic Delta | +858.28K (+18.7%) | -44.04K (-27.7%) |
| Primary Market & Share | 🇺🇸 United States (18%) | 🇺🇸 United States (14.4%) |
| Direct Visits / mo | 3.05M | 41.36K |
| User Rating | 4.1 | 4.4 |
| Supported Platforms | Website | Website |

Privacy-first bot detection and fraud prevention for the web
Multi-layered detection delivers risk scores and near-zero false positives, with passive and no-CAPTCHA modes.
Stop transaction fraud, account takeovers and multi-accounting with privacy-preserving signals and no PII.
A stronger, toll-free alternative to SMS MFA that reduces fraud while simplifying the user experience.
Build custom risk models with adaptive learning and enrich your own ML using blinded, compliant signals.
AI-driven privacy and security apps for phones, desktops and servers
Anti Spy is presented as the first anti-spyware app with dual AV-TEST and DEKRA certification, with a stated 99.87% detection rate, plus dark web checks and camera/recording access monitoring.
Antivirus AI combines a signature engine with on-device machine learning so new and unknown threats are caught in real time without sending your data to the cloud.
iShredder overwrites data using 23 algorithms based on standards from NIST SP 800-88 to DoD 5220.22-M ECE and issues a verifiable erasure report.
Camera Guard and Micro Guard monitor and block camera and microphone access, while Firewall AI governs which apps can reach the network.
Free / Open-sourceAI content detection and a full writing toolkit in one place
Free / Open-sourceAI content detection and a full writing toolkit in one place
Free / Open-sourceAI detection and writing verification built for schools and editors
Free / Open-sourceAI detection and writing verification built for schools and editors
Free / Open-sourceDetect, humanize and verify AI content in one place
Free / Open-sourceDetect, humanize and verify AI content in one place

Free / Open-sourceAll-in-one protection for your identity, credit, family, and devices
Free / Open-sourceAll-in-one protection for your identity, credit, family, and devices

Enterprise AI and plagiarism detection for content integrity

SpecialistAI detector, plagiarism and content-quality checks in one scan
SpecialistAI detector, plagiarism and content-quality checks in one scan

Free / Open-sourceDetect AI-generated text and images with benchmark-tested accuracy
Free / Open-sourceDetect AI-generated text and images with benchmark-tested accuracy
Free / Open-sourceAI detector that highlights evidence, not just a score
Free / Open-sourceAI detector that highlights evidence, not just a score

See your enterprise the way attackers do — observe, understand, signal, and respond at AI speed
See your enterprise the way attackers do — observe, understand, signal, and respond at AI speed

Runtime security that stops prompt injection and data leaks in LLM apps

AI-powered cloud DLP and security awareness training for SaaS environments
AI-powered cloud DLP and security awareness training for SaaS environments

SpecialistCombines document authentication and ID scanning for fraud prevention, but targets identity verification rather than web traffic filtering.
SpecialistCombines document authentication and ID scanning for fraud prevention, but targets identity verification rather than web traffic filtering.