Internet Intelligence Company

Creators of the world’s largest subdomain and exploit database

A.R.P. Syndicate runs its own discovery infrastructure at internet scale and builds cyber assessment, national security, procurement intelligence and consumer security products on top of it, backed by an offensive security team and the Vulnpocalypse newsroom.

Free to query. Subdomain Center and Exploit Observer need no account and no API key.

10B+
Subdomains indexed
1B+
Domains mapped
5.4M+
Vulnerabilities clustered
1M+
Exploits tracked
50+
Sources fused by VEDAS
900+
Advisories published
Products and services

One intelligence platform. Six ways to put it to work.

Two flagship data products, two enterprise platforms and two security offerings, all built on infrastructure we run ourselves rather than a reseller’s feed.

01

Data intelligence APIs

The foundation. Free to query, flat pricing when you need scale.

10B+
subdomains across 1B+ domains

The world’s largest shadow IT and subdomain intelligence database. Discovery does not rely on DNS brute force, so it finds hosts that wordlists and certificate logs never reach.

  • Finds hosts behind Cloudflare and other reverse proxies
  • Brand clustering and keyword hunting for typosquats and shadow IT
  • A built-in source in Subfinder, Uncover, BBOT, theHarvester and Amass
Free API$100/month
Visit subdomain.center
5.4M+
vulnerabilities, 1M+ exploits, one identifier each

Vulnerability and exploit intelligence. VEDAS, our Vulnerability and Exploit Data Aggregation System, clusters the CVE, GHSA, vendor bulletins, national registries and exploit code for the same flaw, so one lookup returns the whole picture.

  • Covers CNNVD, CNVD, BDU, JVNDB and EUVD that Western feeds omit
  • EPSS, CVSS, CISA KEV and exploit maturity in one response
  • Query by CVE, CPE, purl or free text, plus an SBOM scanner
Free API$200/month
Visit exploit.observer
02

Enterprise and national security platforms

Sold directly. Built on the same intelligence, delivered as software.

A cyber assessment platform for your own estate, your subsidiaries and your suppliers. Continuous, evidence-based, and scored.

  • SCA, SAST and DAST in one platform
  • Fourth-party assessment and dark web monitoring
  • Vulnerability management and prioritization
  • Cyber insurance underwriting and sovereign threat intelligence
EnterpriseFrom $5k/year
Learn more

Face and object clustering for CCTV feeds, captured over a secure encrypted tunnel, in the cloud or fully on-prem.

  • Faces clustered, never named unless you supply a reference set
  • Detects vehicles, bags, PPE gaps, weapons and tailgating
  • Works with any RTSP or MJPEG camera or NVR
EnterpriseFrom $5k/year
Learn more
03

Security for people and organizations

On the phone, and against your own environment.

One Android app with two tools: an on-device firewall against stalkerware, spyware and banking trojans, and an encrypted chat with no server, no phone number and no account.

  • Blocks malware by IP, domain and TLS fingerprint. No root, no cloud
  • Chat over Tor or Bluetooth with post-quantum keys
  • Digital Executive Protection for business leaders
Free for consumersExecutives from $1k/yr
Visit encryptlayer.net

Offensive security engagements run by the team that builds the intelligence. We start from infrastructure already mapped and exploits already correlated, not from a blank scan.

  • Red teaming and adversarial simulation
  • Vulnerability assessment and penetration testing (VAPT)
  • Prioritized by Exploit Observer, mapped by Subdomain Center
Engagement-based
Scope an engagement
Procurement intelligence

Every open government tender, in one search.

Tender Portal is our procurement intelligence product. Public buyers publish tenders across hundreds of national and regional systems, each in its own language. We gather the open ones into a single English search, updated daily, and link every notice back to the official portal where you bid.

Built for exporters, bid and proposal teams, consultants and business development teams.

Free to browsePro $500/yearEnterprise from $1,000/year
Tender Portaltenderportal.io
100+Countries
ENEvery notice in English
DailyUpdates
  • One search in place of hundreds of national systemsTenders, RFPs and contracts from public buyers worldwide.
  • Official source, alwaysEach notice links to the original portal where bids are submitted.
  • Market views by country and sectorSee what a government is buying before you enter its market.
Newsroom

Vulnpocalypse: news, advisories and data.

AI now finds bugs faster than anyone can fix them. Vulnpocalypse, the news and advisory site published by A.R.P. Syndicate, tracks every major exploited bug, supply-chain attack and breach, scores them live with VEDAS and EPSS, and tells developers what to patch.

  • 900+ advisories covering breaches, exploited bugs, supply-chain attacks and threat research
  • Live data: CISA KEV, biggest movers, detection gaps and a CVE page for every tracked bug
  • Country filter, including India, and an RSS feed
Platform

Collect, correlate, assess, act.

Every product shares one intelligence core. Data we collect for one becomes signal for the others, which is why a free API, an enterprise platform and a newsroom can all be run by one team.

01

Collect

Our own crawlers and ingestion pipelines map the open internet: hosts, certificates, vulnerability registries, exploit code and public tenders.

Subdomain Center, Tender Portal
02

Correlate

VEDAS, the Vulnerability and Exploit Data Aggregation System, groups every identifier for the same flaw under one cluster and scores it for exploit maturity and likelihood of attack.

VEDAS, Exploit Observer
03

Assess

Kenzer applies that intelligence to a real organization: its code, its internet-facing assets, its suppliers and its leaked credentials.

Kenzer, Osprey Vision
04

Act

Findings turn into patches, protected devices, offensive tests and published advisories that tell people what to do next.

EncryptLayer, Red Teaming & VAPT, Vulnpocalypse
Solutions

Built for the people who defend, assess and win.

Security teams, researchers and developers

Map attack surface and prioritize by real exploitability. Query the data free from the terminal, or through Subfinder, Uncover, BBOT and Amass.

Enterprises and insurers

Run continuous cyber assessments across your estate, your subsidiaries and your suppliers, with a score an underwriter can price against.

Governments and CERTs

Sovereign threat intelligence and national-scale exposure tracking, with on-prem deployment for sensitive environments.

Procurement and business development

Find open government tenders and RFPs across 100+ countries in one English search, each linked to the official portal.

Facilities and physical security

Understand who and what is on your cameras across sites, with faces clustered but never named by default.

Individuals and executives

Stop stalkerware, spyware and banking trojans on the phone, and message privately with no account and no server.

Pricing

Try it free. Pay when you need scale.

Free tiers return the same data as paid ones. A paid key removes limits rather than unlocking different data, so you can judge the quality before you speak to anyone.

ProductFreePaidModel
Subdomain CenterUp to 500 results per query, no accountRandom orderAPI
Exploit Observer5 requests per minute, no accountSame data as paidAPI
EncryptLayerFree for consumersApp and license
KenzerTalk to usEnterprise
Osprey VisionLive demo on requestEnterprise
Red Teaming & VAPTScoping callServices
Tender PortalFree to browseSubscription
VulnpocalypseFree to readNot applicablePublication

Subdomain Center and Exploit Observer are also available from the terminal with puncia, our open-source CLI. Need a custom dataset? Choose that option in the form below.

FAQ

Common questions

What does A.R.P. Syndicate do?
A.R.P. Syndicate is an Internet Intelligence company. We operate the world’s largest subdomain and exploit intelligence databases (Subdomain Center and Exploit Observer) and build products on top of them: Kenzer for cyber assessment, Osprey Vision for CCTV analytics, Tender Portal for public procurement and EncryptLayer for mobile security, plus Red Teaming and VAPT services and the Vulnpocalypse news and advisory site.
Is Subdomain Center free?
Yes. It is free to query with no account and no API key, returning up to 500 results per query in random order. A paid API key from $100 per month removes the cap and returns full, sorted results. The data is the same either way.
Is there a free CVE and exploit API?
Yes. Exploit Observer is free and anonymous at 5 requests per minute per IP, with no account and no key. API keys from $200 per month raise the limit. The data is identical either way.
What is VEDAS?
VEDAS stands for Vulnerability and Exploit Data Aggregation System. It is our clustering system. One real-world vulnerability usually collects many identifiers: a CVE number, a GHSA advisory, vendor bulletins, exploit modules and national registry entries. VEDAS groups them under one identifier so a single lookup returns the complete picture, including exploit maturity and prediction scores.
What is Vulnpocalypse?
Vulnpocalypse is the news and advisory site from A.R.P. Syndicate. It tracks the 2026 surge in AI-found vulnerabilities, exploited bugs, supply-chain attacks and breaches, scores them with live data, and tells developers what to patch.
Who are the products built for?
Security and red teams, enterprises and insurers running cyber assessments, governments and CERTs, procurement and business development teams, and individuals and executives who need protection on their phones. See the solutions section above for the products behind each.
How do I buy or get a demo?
Use the contact form below or email sales@arpsyndicate.io. Subdomain Center, Exploit Observer, Tender Portal and EncryptLayer can be tried free first. Kenzer, Osprey Vision and Red Teaming & VAPT are sold directly by our team.
Contact

Talk to our team.

Tell us what you are working on and which product caught your eye. A person on our team replies with next steps, pricing or a demo.

Sales and demossales@arpsyndicate.io
DevelopersStart free on Subdomain Center and Exploit Observer, or install puncia.
Press and researchFollow Vulnpocalypse or the A.R.P. Syndicate blog.