1
Pentest Contracts
github.com/cure53/ContractsAlso covers security, security tools, and template
Adapt this collection of contract templates for penetration testing engagements.
Alternatives
The Best Nuclei Alternatives in 2026
24 alternatives1 free · 4 open source
Looking for something like Nuclei? Here are 24 alternatives, ranked by how closely they match it on purpose, features and platforms. Of these, 1 are free or have a free plan and 4 are open source.
Nuclei scans for vulnerabilities using customizable templates written in YAML.
Top picks at a glance
First suggestionPentest ContractsAdapt this collection of contract templates for penetration…Free or freemium optionOTP AuthManage two-factor authentication codes with OTP Auth, an…Open source optionNucleiScan applications, APIs, networks, DNS, and cloud…
Quick comparison
| # | Alternative | Pricing | Open source | Platforms |
|---|---|---|---|---|
| 1 | Pentest Contracts | — | Not stated | — |
| 2 | Nuclei | — | Yes | — |
| 3 | Oscp Exam Report Template Markdown | — | Yes | Windows |
| 4 | Cli | — | Not stated | — |
| 5 | Results | — | Not stated | Web, Windows |
| 6 | OSCP-Exam-Report-Template-Markdown | — | Not stated | Web, Windows |
| 7 | Octane | — | Not stated | Web |
| 8 | BeVigil | — | Not stated | Android, Web |
| 9 | Agentic Radar | — | Yes | — |
| 10 | masscan | — | Yes | — |
All Nuclei alternatives
2
Also covers security and security tools · open source
Scan applications, APIs, networks, DNS, and cloud configurations for vulnerabilities using Nuclei.
3
Also covers security tools and template · open source
Use Markdown templates to prepare reports for listed Offensive Security certification exams.
4
Cli
github.com/snyk/cliAlso covers security and security tools
Snyk CLI scans and monitors software projects for security vulnerabilities.
5
Results
nmap.org/ndiffAlso covers security and security tools · same kind of website
Ndiff compares Nmap scan results from two XML files, showing changes such as hosts and ports appearing or disappearing.
6
OSCP-Exam-Report-Template-Markdown
noraj.github.io/OSCP-Exam-Report-Template-Mark…Also covers security tools and template · same kind of website
This Markdown template helps candidates prepare reports for Offensive Security certification exams.
7
Octane
octane.securityAlso covers security and security tools
Octane analyzes application code to find exploitable security vulnerabilities and trace attack paths.
8
BeVigil
bevigil.com/searchAlso covers security and security tools
BeVigil scans mobile apps and provides security scores based on its indexed app data.
9
Also covers security and security tools · open source
Agentic Radar scans agent workflows for security issues and helps developers review potential risks.
10
Also covers security and security tools · open source
Scan TCP ports with masscan, an asynchronous scanner designed for large network ranges.
11
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.
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
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.
18
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.
19
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.
20
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.
21
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.
22
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.
23
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.
24
BugBountyHunting
bugbountyhunting.comAlso covers security and security tools · same kind of website
Search a community-curated collection of bug bounty writeups and learning resources.
No alternatives match this filter.
Alternatives to similar tools
OTP Auth24 alternativesMozilla SSL24 alternativesNVD24 alternativeschallenges.re24 alternativesGoPlus Locker V324 alternativesWhatsMyDNS24 alternatives
TopicSecurity Tools · 202 sites Best-of list8 Best Free Authenticator Apps for Codes and Recovery ListingNuclei details
What is the best alternative to Nuclei?
Based on features, tags and platforms, the closest alternatives to Nuclei are Pentest Contracts, Nuclei, and Oscp Exam Report Template Markdown.
Is there a free alternative to Nuclei?
Yes. OTP Auth is free or offer a free plan.
Are there open-source alternatives to Nuclei?
Yes: Nuclei, Oscp Exam Report Template Markdown, Agentic Radar, and masscan.
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