1
arin
arin.netAlso covers dns lookup, domain ip dns, and internet
ARIN administers IP addresses and autonomous system numbers for internet operations in its region.
Alternatives
The Best GreyNoise Intelligence Alternatives in 2026
24 alternatives1 free · 2 open source
Looking for something like GreyNoise Intelligence? 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 2 are open source.
About GreyNoise Intelligencegreynoise.io/viz
VisitGreyNoise Intelligence analyzes untargeted internet scanning and provides context about IP addresses seen probing networks.
Top picks at a glance
First suggestionarinARIN administers IP addresses and autonomous system numbers…Free or freemium optionCloudflare DNSCloudflare DNS provides public DNS resolution and…Open source optionCloudFlare DDNS UpdaterCloudflare DDNS Updater updates dynamic DNS records so…Another optionianaIANA manages DNS root zone assignments and other internet…
Quick comparison
| # | Alternative | Pricing | Open source | Platforms |
|---|---|---|---|---|
| 1 | arin | — | Not stated | Web |
| 2 | iana | — | Not stated | Web |
| 3 | lacnic | — | Not stated | Web |
| 4 | Free online network tools | — | Not stated | Web |
| 5 | LeakIX | — | Not stated | Web |
| 6 | Netlas: | — | Not stated | Web, Windows |
| 7 | whois | — | Not stated | Web |
| 8 | Pyfunceble | — | Not stated | Web |
| 9 | Cloudflare DNS | Free | Not stated | Web |
| 10 | IP search - Network Entity Reputation Database | — | Not stated | Web |
All GreyNoise Intelligence alternatives
2
iana
iana.orgAlso covers dns lookup, domain ip dns, and internet
IANA manages DNS root zone assignments and other internet numbering and protocol registries.
3
lacnic
lacnic.netAlso covers dns lookup, domain ip dns, and internet
LACNIC manages IP addresses and autonomous system numbers for Latin America and the Caribbean.
4
Free online network tools
centralops.net/coAlso covers dns lookup and domain ip dns · same kind of online tool
Central Ops offers network diagnostic tools including traceroute, nslookup, and WHOIS lookups.
5
LeakIX
leakix.netAlso covers dns lookup and domain ip dns
LeakIX searches exposed internet services and databases by query terms such as ports, protocols, and IP addresses.
6
Netlas:
netlas.ioAlso covers dns lookup and domain ip dns · same kind of online tool
Netlas provides search tools for internet infrastructure, including DNS, WHOIS, and IP lookups.
7
whois
whois.b1s4.xyzAlso covers dns lookup and domain ip dns · same kind of online tool
Look up DNS records and RDAP domain information with whois_, which supports common record types and network entities.
8
Pyfunceble
pyfunceble.github.ioAlso covers dns lookup and domain ip dns · same kind of online tool
PyFunceble checks whether domains, IP addresses, and URLs are available or syntactically valid.
9
Also covers dns lookup and domain ip dns · same kind of online tool · free
Cloudflare DNS provides public DNS resolution and authoritative DNS services.
10
IP search - Network Entity Reputation Database
nerd.cesnet.cz/nerd/ipsAlso covers dns lookup and domain ip dns
Network Entity Reputation Database lets users search IP details and reputation information through its interface.
11
AFRINIC
afrinic.netAlso covers dns lookup and domain ip dns
AFRINIC allocates and manages IP addresses and autonomous system numbers for Africa.
12
apnic
apnic.netAlso covers dns lookup and domain ip dns
APNIC administers internet number resources for the Asia Pacific region.
13
Also covers dns lookup and domain ip dns · open source
Cloudflare DDNS Updater updates dynamic DNS records so users can reach a home network through a custom domain.
14
Also covers dns lookup and domain ip dns · open source
metabigor collects open source intelligence about internet assets without requiring API keys for its workflow.
15
Also covers dns lookup and domain ip dns · same kind of online tool
Whoxy provides a WHOIS API for looking up domain registration records from a database of historical records.
16
Wappalyzer
wappalyzer.com/lookupAlso covers dns lookup and domain ip dns · same kind of online tool
Wappalyzer identifies technologies used to build websites, showing frameworks, analytics, and hosting components.
17
IWantMyName
iwantmyname.comAlso covers dns lookup and domain ip dns · same kind of online tool
IWantMyName registers domain names across more than 500 extensions and offers related plugins.
18
Domainr
domainr.comAlso covers dns lookup and domain ip dns · same kind of online tool
Domainr searches domain names and provides an API covering top-level domains.
19
RDAP
client.rdap.orgAlso covers dns lookup and domain ip dns · same kind of online tool
Look up domain, IP, autonomous system, and entity records with RDAP.org RDAP-based lookup tool.
20
SD Finder
subdomainfinder.c99.nlAlso covers dns lookup and domain ip dns · same kind of online tool
Scan a domain for subdomains with Subdomain Finder, which offers private scans that are not logged or indexed.
21
Also covers dns lookup and domain ip dns · same kind of online tool
Check domain registration details and availability with Whois.com, which also sells domain names and hosting.
22
Website Information
one-plus.github.io/WebsiteInformationAlso covers dns lookup and domain ip dns · same kind of online tool
OSINT Toolkit page listing website, IP, domain, email and MAC lookup tools; some tools need a known identifier to run.
23
dnslytics
dnslytics.comAlso covers dns lookup and domain ip dns · same kind of online tool
DNSlytics provides reverse IP, NS, MX, WHOIS, and domain lookup tools.
24
Website search tool
aware-online.com/en/osint-tools/website-search…Also covers dns lookup and domain ip dns · same kind of online tool
Website search tool provides OSINT utilities for investigating a website and its associated infrastructure.
No alternatives match this filter.
Alternatives to similar tools
Cloudflare DNS24 alternativesNetlas:24 alternativesFree online network tools24 alternativesIP search - Network Entity Reputation Database24 alternativesCloudFlare DDNS Updater24 alternativesWappalyzer24 alternatives
What is the best alternative to GreyNoise Intelligence?
Based on features, tags and platforms, the closest alternatives to GreyNoise Intelligence are arin, iana, and lacnic.
Is there a free alternative to GreyNoise Intelligence?
Yes. Cloudflare DNS is free or offer a free plan.
Are there open-source alternatives to GreyNoise Intelligence?
Yes: CloudFlare DDNS Updater and metabigor.
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