1
digger.tools
digger.toolsAlso covers dns lookup and domain ip dns · same kind of online tool
Domain Digger looks up DNS, WHOIS, IP data, SSL history, and subdomains for a domain.
Alternatives
The Best SD Finder Alternatives in 2026
24 alternatives1 free · 1 open source
Looking for something like SD Finder? 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 1 are open source.
Scan a domain for subdomains with Subdomain Finder, which offers private scans that are not logged or indexed.
Top picks at a glance
First suggestiondigger.toolsDomain Digger looks up DNS, WHOIS, IP data, SSL history…Free or freemium optionCloudflare DNSCloudflare DNS provides public DNS resolution and…Open source optionSubDomainizerSubDomainizer searches web pages, folders, and JavaScript…Another optionMerklemapFind subdomains and certificates linked to a website with…
Quick comparison
| # | Alternative | Pricing | Open source | Platforms |
|---|---|---|---|---|
| 1 | digger.tools | — | Not stated | Web |
| 2 | Merklemap | — | Not stated | Web |
| 3 | Whoxy | Paid | Not stated | Web |
| 4 | IWantMyName | — | Not stated | Web |
| 5 | Domainr | — | Not stated | Web |
| 6 | RDAP | — | Not stated | Web |
| 7 | Whois | Paid | Not stated | Web |
| 8 | Website Information | — | Not stated | Web |
| 9 | dnslytics | — | Not stated | Web |
| 10 | DomainTyper | — | Not stated | Android, iOS, Web |
All SD Finder alternatives
2
Merklemap
merklemap.comAlso covers dns lookup and domain ip dns · same kind of online tool
Find subdomains and certificates linked to a website with Merklemap search and enumeration tools.
3
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.
4
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.
5
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.
6
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.
7
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.
8
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.
9
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.
10
DomainTyper
domaintyper.comAlso covers dns lookup and domain ip dns · same kind of online tool
DomainTyper searches for available domain names across extensions as users type.
11
Also covers dns lookup and domain ip dns · same kind of online tool · free
Cloudflare DNS provides public DNS resolution and authoritative DNS services.
12
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.
13
Whois Search
webwhois.verisign.com/webwhois-ui/index.jsp?la…Also covers dns lookup and domain ip dns · same kind of online tool
Verisign Whois Search provides information about domain name registrations, including .com and .net records.
14
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.
15
Also covers dns lookup and domain ip dns · open source
SubDomainizer searches web pages, folders, and JavaScript files for subdomains and related information.
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
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.
18
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.
19
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.
20
GreyNoise Intelligence
greynoise.io/vizAlso covers dns lookup and domain ip dns · same kind of online tool
GreyNoise Intelligence analyzes untargeted internet scanning and provides context about IP addresses seen probing networks.
21
Also covers dns lookup and domain ip dns
Google Transparency Report publishes data about requests and activity affecting Google services.
22
InstantDomain
instantdomainsearch.comAlso covers dns lookup and domain ip dns
Search domain names and check availability across more than 800 extensions with InstantDomain.
23
IANA — Root Zone Database
iana.org/domains/root/dbAlso covers dns lookup and domain ip dns
IANA Root Zone Database lists delegation details for top-level domains in the DNS root.
24
Domain Tools
whois.domaintools.comAlso covers dns lookup and domain ip dns
DomainTools provides WHOIS lookups, domain availability searches, IP history, traffic data, and other domain research information.
No alternatives match this filter.
Alternatives to similar tools
Google Transparency Report24 alternativesCloudflare DNS24 alternativesNetlas:24 alternativesIWantMyName24 alternativesRDAP24 alternativesWebsite Information24 alternatives
What is the best alternative to SD Finder?
Based on features, tags and platforms, the closest alternatives to SD Finder are digger.tools, Merklemap, and Whoxy.
Is there a free alternative to SD Finder?
Yes. Cloudflare DNS is free or offer a free plan.
Are there open-source alternatives to SD Finder?
Yes: SubDomainizer.
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