Looking for something like Observatory? Here are 24 alternatives, ranked by how closely they match it on purpose, features and platforms. Of these, 2 are free or have a free plan and 2 are open source.
Test HTTP security headers such as CSP and HSTS, then review recommendations for improving a site.
| # | Alternative | Pricing | Open source | Platforms |
|---|---|---|---|---|
| 1 | Clearstar | — | Not stated | Web |
| 2 | Metasploit | — | Not stated | Web |
| 3 | Agentic Radar | — | Yes | — |
| 4 | ZeroSSL | — | Not stated | Web |
| 5 | Certbot | — | Not stated | Linux, macOS, Web |
| 6 | SSL for Free | Free | Not stated | Web |
| 7 | Anubis | — | Not stated | Web |
| 8 | Superagent | Freemium | Not stated | Web |
| 9 | BrowserLeaks | — | Not stated | Web |
| 10 | Cover Your Tracks | — | Not stated | Web |
Clearstar reviews protocol governance, permissions, contracts, and oracles, then recommends fixes through its qualitative diligence process.
Use Metasploit to find security issues, verify mitigations, and manage authorized penetration testing assessments.
Agentic Radar scans agent workflows for security issues and helps developers review potential risks.
ZeroSSL issues online SSL certificates and supports HTTPS setup through a certificate management interface.
Obtain a certificate for a website with Certbot, which helps configure HTTPS.
SSL for Free provides SSL and wildcard certificates for enabling HTTPS on websites.
Protect a website from automated bot requests with Anubis, which evaluates incoming HTTP requests.
Superagent provides an autonomous security platform for testing applications, repositories, agents, and infrastructure.
Test a browser for privacy leaks, including exposed IP addresses, device information, and fingerprinting risks.
Test how trackers and fingerprinting systems see your browser with Cover Your Tracks from the EFF.
SSL Labs provides tools for testing SSL and TLS configurations and related public key infrastructure.
Check browser fingerprints and run DNS leak, IP, port, and WebRTC tests with BrowserScan.
IPv6 Leak Test checks whether a device has IPv6 connectivity and displays connection information related to privacy.
Test browser fingerprinting characteristics with CreepJS, which displays fingerprint and WebRTC results.
AllSafe provides an intentionally vulnerable Android app for security testing and practice.
GoPlus offers Web3 security tools including audits, APIs, a user security hub, and a browser extension.
The Snyk Security Database provides vulnerability details and remediation guidance for packages and cloud configurations.
Discover hosts and map networks with Nmap, a network exploration and security scanning tool.
Wazuh monitors systems and detects threats through an open source security platform for organizations.
Threat Radar displays current cyber threat intelligence on a live map, showing security activity from its data sources.
Use community-sourced threat intelligence and blocklists from CrowdSec to support security operations.
Snyk helps software teams identify and manage security risks in code and dependencies while building AI-enabled applications.
Asymmetric Research provides security partnerships for L1 and L2 blockchains and DeFi protocols, including engineering and threat-response work.
Security Onion Solutions develops and supports products related to its Security Onion security monitoring platform.
Alternatives are suggested from the purpose and features described in our listings. Different pages for the same product appear once. Read each description to check whether it fits your task. How we choose alternatives · Suggest an alternative
