1
Also covers security and security tools · open source
Anubis weighs incoming HTTP requests to help block AI crawlers before they access a website.
Alternatives
The Best Anubis Alternatives in 2026
24 alternatives2 free · 2 open source
Looking for something like Anubis? 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.
Protect a website from automated bot requests with Anubis, which evaluates incoming HTTP requests.
Top picks at a glance
First suggestionAnubisAnubis weighs incoming HTTP requests to help block AI…Free or freemium optionSSL for FreeSSL for Free provides SSL and wildcard certificates for…Another optionBig Number CalculatorBig Number Calculator evaluates very large mathematical…
Quick comparison
| # | Alternative | Pricing | Open source | Platforms |
|---|---|---|---|---|
| 1 | Anubis | — | Yes | — |
| 2 | Big Number Calculator | — | Not stated | Web, Windows |
| 3 | mCaptcha | — | Not stated | Web |
| 4 | Evervault | — | Not stated | Web |
| 5 | Observatory | — | Not stated | Web |
| 6 | ZeroSSL | — | Not stated | Web |
| 7 | Certbot | — | Not stated | Linux, macOS, Web |
| 8 | SSL for Free | Free | Not stated | Web |
| 9 | OTP Auth | Freemium | Not stated | iOS, Web |
| 10 | DNS over HTTPS | — | Not stated | — |
All Anubis alternatives
2
Big Number Calculator
defuse.ca/big-number-calculator.htmAlso covers security and security tools · same kind of website
Big Number Calculator evaluates very large mathematical expressions in a web browser.
3
mCaptcha
mcaptcha.orgAlso covers security and security tools · same kind of website
Add proof-of-work verification to websites with mCaptcha, a privacy-focused automated CAPTCHA system.
4
Evervault
evervault.comAlso covers security and security tools · same kind of website
Protect payment data with Evervault’s encryption model while retaining control of the payment experience.
5
Observatory
developer.mozilla.org/en-US/observatoryAlso covers security and security tools · same kind of website
Test HTTP security headers such as CSP and HSTS, then review recommendations for improving a site.
6
ZeroSSL
zerossl.comAlso covers security and security tools · same kind of website
ZeroSSL issues online SSL certificates and supports HTTPS setup through a certificate management interface.
7
Certbot
certbot.eff.orgAlso covers security and security tools · same kind of website
Obtain a certificate for a website with Certbot, which helps configure HTTPS.
8
Also covers security and security tools · same kind of website · free
SSL for Free provides SSL and wildcard certificates for enabling HTTPS on websites.
9
Also covers security and security tools · same kind of website · free plan
Manage two-factor authentication codes with OTP Auth, an iOS app listed on the App Store.
10
DNS over HTTPS
github.com/curl/curl/wiki/DNS-over-HTTPSAlso covers security and security tools
Configure DNS over HTTPS in curl, the command-line transfer tool and library.
11
Also covers security and security tools · open source
Configure DNS over HTTPS on iOS and macOS using the provided configuration profiles.
12
Also covers security and security tools · same kind of website
Generate secure SSL configurations for selected web, database, and mail software.
13
challenges.re
challenges.reAlso covers security and security tools · same kind of website
Solve reverse engineering challenges published on challenges.re, a challenge-focused site.
14
GoPlus Locker V3
gopluslabs.ioAlso covers security and security tools · same kind of website
GoPlus offers Web3 security tools including audits, APIs, a user security hub, and a browser extension.
15
NVD
nvd.nist.govAlso covers security and security tools · same kind of website
Search the National Vulnerability Database, a public resource for vulnerability information.
16
tpscalls.live
tpscalls.liveAlso covers security and security tools · same kind of website
View Toronto Police calls for service on a map that updates in real time, according to the supplied page description.
17
WhatsMyDNS
whatsmydns.netAlso covers security and security tools · same kind of website
WhatsMyDNS checks DNS record propagation across global resolvers for record types including A, AAAA, MX, and TXT.
18
Metasploit
metasploit.comAlso covers security and security tools · same kind of website
Use Metasploit to find security issues, verify mitigations, and manage authorized penetration testing assessments.
19
Synk
security.snyk.ioAlso covers security and security tools · same kind of website
The Snyk Security Database provides vulnerability details and remediation guidance for packages and cloud configurations.
20
URL Decoder/Encoder
meyerweb.com/eric/tools/dencoderAlso covers security and security tools · same kind of website
The URL Decoder and Encoder converts text between encoded and decoded forms, including JavaScript URLs.
21
Lucia
lucia-auth.comAlso covers security and security tools · same kind of website
Lucia was deprecated in March 2025. The website was updated in July 2026 and points to code/auth_session.ts as a single-file replacement for the NPM package and to the Auth Book for auth information.
22
DNSPerf
dnsperf.com/dns-providers-listAlso covers security and security tools · same kind of website
DNSPerf compares the performance and uptime of enterprise and commercial DNS providers.
23
BugBountyHunting
bugbountyhunting.comAlso covers security and security tools · same kind of website
Search a community-curated collection of bug bounty writeups and learning resources.
24
UUID Tools
uuidtools.comAlso covers security and security tools · same kind of website
UUID Tools generates individual or bulk UUIDs and supports multiple UUID versions.
No alternatives match this filter.
Alternatives to similar tools
OTP Auth24 alternativesMozilla SSL24 alternativesNVD24 alternativeschallenges.re24 alternativesGoPlus Locker V324 alternativesmCaptcha24 alternatives
TopicSecurity Tools · 202 sites Best-of list8 Best Free Authenticator Apps for Codes and Recovery ListingAnubis details
What is the best alternative to Anubis?
Based on features, tags and platforms, the closest alternatives to Anubis are Anubis, Big Number Calculator, and mCaptcha.
Is there a free alternative to Anubis?
Yes. SSL for Free and OTP Auth are free or offer a free plan.
Are there open-source alternatives to Anubis?
Yes: Anubis and iOS + macOS Configs.
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