surbl.org
SURBL
Who runs SURBL, what it tracks and what it costs, and the 20 closest threat intelligence feeds alternatives.
- Who’s behind it
- Not stated
- Online since
- Unknown
- Trackers
- Prices
- No pricing page
- Last price change
- –
- Closest alternative
- URIBL.COM
Measured from SURBL’s own pages, the Internet Archive and public records. Hover a dotted value for its source and date.
Visit SURBL01 · Who’s behind it
Who runs SURBL
- Company
- No imprint we could read
- Online since
- Not in the Internet Archive
02 · Privacy
What SURBL tracks
What the homepage loads before you accept or decline cookies. A cookie banner should hold most of it back until you agree, and a tag manager can load more that we don’t see.
trackers that follow visitors
None of the 19 alternatives below has fewer; 13 have more.
Privacy-friendly alternatives →- Cookie banner
- None found
We found no trackers, ad pixels or third-party embeds on SURBL’s homepage.
03 · Alternatives
Alternatives to SURBL
Thumbs up if it’s a real alternative to SURBL, thumbs down if it isn’t.
- 01
URIBL.COM - Realtime URI Blacklist
URIBL.COM is a Realtime URI Blacklist (RHSBL) served via DNS to identify Unsolicitied Bulk and Commercial Email (UCE/UBE) based on the links within the email. URIBL.COM is enabled by default in the popular opensource SpamAssassin.
Very close - 02
Strengthening trust and safety across the internet | Spamhaus
Strengthening trust and safety online through IP and domain reputation intelligence, expertise, education, and community collaboration.
Very close - 03
SpamCop.net - Beware of cheap imitations
Beware of cheap imitations! SpamCop has been protecting the internet community since 1998. Automatically file spam reports with the network administrators who can stop unsolicited email at the source. Subscribe, and filter your email before it reaches your inbox.
Very close - 04
abuse.ch | Fighting malware and botnets
abuse.ch | Fighting malware and botnets
Very close - 05
BarracudaCentral.org - Technical Insight for Security Pros
Very close - 06
Rspamd — Email Security System
Rspamd is an email-security engine that stops phishing, business email compromise, malware, and spam for enterprises, ESPs, and hosting providers. Open-source detection core with premium support and SLAs.
Very close - 07
NextDNS - The new firewall for the modern Internet
NextDNS protects you from all kinds of security threats, blocks ads and trackers on websites and in apps and provides a safe and supervised Internet for kids — on all devices and on all networks.
Very close - 08
URL and website scanner - urlscan.io
urlscan.io - Website scanner for suspicious and malicious URLs
Very close - 09
company
Very close - 10
Threat Intelligence & Domain Security Platform | DomainTools
DomainTools provides DNS-based threat intelligence covering 97% of internet infrastructure. Detect, investigate & block malicious domains. Request a demo.
Close - 11
MX Lookup Tool - Check your DNS MX Records online - MxToolbox
Very close - 12
CleanBrowsing | DNS Content Filtering Service
Affordable DNS filtering that blocks malware, adult content, and unwanted sites. Protect schools, families, and businesses at the network level.
Very close - 13
Home
Boost subscriber performance by up to 25% for less than 1% of your overall 5G network investment.
Very close - 14
Pi-hole – Network-wide Ad Blocking
ad- and tracker-blocking application
Very close - 15
AdGuard DNS — ad-blocking DNS server
Create your ad-blocking DNS server that will protect your personal data, prevent tracking and allow you to control access to specific content on the Internet.
Very close - 16
Threat Intelligence, URL Database & Web Classification Solutions
zvelo Powers Security & Safety Solutions with Advanced Domain & URL Intelligence, SaaS App Intelligence, Phishing & Threat Intelligence.
Close - 17
Linkmake
Make your link safe using Link Protector
Very close - 18
Cloudflare: Build for the agent era
Welcome to Cloudflare - Powering the next generation of applications
Very close - 19
WhoisXML API: #1 for Domain, WHOIS, IP, DNS & Threat Intelligence
WhoisXML API offers domain, WHOIS, IP and DNS data feeds, APIs, and research & monitoring tools for greater enterprise security and data-driven business.
Close - 20
oopspam: Automate your Spam and Fraud Detection
Prevent spam and fraud before they impact your business. High accuracy. Zero data compromise.
Close
Closest first, by how much each site’s offer resembles SURBL’s. Trackers are counted the same way as above. Highlighted technologies are ones SURBL uses too. Votes and comments come from visitors and don’t change the order.
04 · History
What changed
Price and policy history →No changes yet. Each new crawl is compared with the last one, and what SURBL adds, drops or rewrites shows up here.
05 · Details
How we measure
Alternatives are matched by what sites actually offer, from their homepages, Wikidata and a summary by Claude, in any language. Trackers and the rest of the stack come from the homepage’s code and DNS records.
The full technology stack, the competitor map and search numbers · 2 technologies
- Neighbours
- k = 20
- Sites searched
- 9,192
- Vector
- 384-d
- Query
- 41 ms
Competitor map
Each alternative by how close its vector is to SURBL’s (x) and how much traffic it gets, how much of the stack it shares, or where it sits in the embedding space itself (y). Hover for the numbers, click to jump to it in the list.
similarity × popularity
What competitors use
Across the 20 closest sites.
- Google Search Console · not on surbl.org 14/20
- Cloudflare · not on surbl.org 10/20
- Google Workspace · not on surbl.org 9/20
- Google Fonts · not on surbl.org 6/20
- Google Tag Manager · not on surbl.org 6/20
- Cloudflare DNS · not on surbl.org 6/20
- Google Analytics · not on surbl.org 5/20
- jQuery · not on surbl.org 5/20
- Microsoft 365 · not on surbl.org 5/20
- Zendesk · not on surbl.org 5/20
- nginx 3/20
- Apache HTTP Server · not on surbl.org 3/20
- Bootstrap · not on surbl.org 3/20
- Amazon Route 53 · not on surbl.org 3/20
- jsDelivr · not on surbl.org 3/20
- cdnjs · not on surbl.org 3/20