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Hudson Rock alternative: Seer compared

Hudson Rock and Seer both let you look up data captured from infostealer-infected devices. Hudson Rock is an enterprise threat-intelligence vendor built around domain dashboards, identity monitoring, threat feeds and published research, sold through demos and sales. Seer is a self-serve search interface where stealer logs are one of four surfaces, alongside breached credentials, social accounts and US people search, with each device record browsable as an archive.

Checked against the Hudson Rock pages under Sources on October 6, 2026.

What Hudson Rock is

Hudson Rock is an Israeli cybercrime intelligence company whose database is built from machines compromised by infostealers in global malware campaigns. Its Cavalier platform and API serve brand protection and data enrichment, Bayonet is a prospecting tool for cybersecurity sales teams and MSSPs, and it offers free lookup tools, Cavalier GPT, a blog and weekly infostealer reports.

Infostealer intelligence platform and API for enterprise security teams

Side by side.

CapabilityHudson RockSeer
Identifiers acceptedDomain, email, username, password, IP, stealer ID, keyword, file nameEmail, username, phone, domain, password, IP, hash, name, address
Breach / credential searchCredentials recovered from infected machinesBreached credential rows with source name and date
Infostealer / device dataMachine profile, stolen file tree, browser history termsDevice records with thirteen views and a browsable archive
Username / social enumerationUsername lookup within stealer dataUsername, email or phone checked across 700+ platforms
People / public recordsNot part of listed productsUS public filings: addresses, relatives, aliases
Free tierFree domain, email/username, APK and technology lookups10 searches a day, credentials and device values masked
Monitoring / alertsEmail, Slack, Splunk, Torq, webhook; IdP response actionsMonitors with email alerts; webhooks on Premium
APIREST API; free development key on requestJSON API on Premium and Team, same daily pool
Pricing modelCavalier on request; Bayonet tiers, prices not publishedFree, $12.99, $29.99, $150 a month; Team $129 a seat
Sign-upCavalier via demo or sales; Bayonet free sign-upSelf-serve plans
Data handling / privacy stancePrivacy policy governed by Israeli lawSearched at query time; searches never sold; audit-logged
Takedown / opt-outPrivacy policy covers deletion requests; no opt-out page foundConfirm an email you control to suppress its rows
Geographic scopeGlobal infections; geo filters in CavalierPeople search US only

Sources

Where each is the better pick.

Hudson Rock

  • Hudson Rock publishes a steady stream of infostealer research: a blog, weekly statistical reports, and ethical disclosures to affected organizations.
  • Its free tools check a whole corporate domain, an Android app, or a technology footprint without an account, which Seer does not offer.
  • Cavalier connects to Okta, Azure AD and Auth0 to revoke sessions and disable accounts automatically when an employee identity appears in a new infection.
  • It covers supply-chain and industry views, showing which partners and vendors appear in infections and where shared risk concentrates.
  • Cavalier offers threat feeds for infostealer C2 servers, ClickFix and phishing-as-a-service infrastructure, plus SSO, CSV and PDF exports for security programs.
  • Bayonet is built for cybersecurity sales teams and MSSPs prospecting companies with compromised credentials.

Seer

  • Seer publishes its prices and is self-serve, so an individual can start searching without a demo or sales call.
  • Each compromised device record keeps its archive browsable, with a full file browser and regex search on Premium.
  • Breached credentials from third-party breach sources sit alongside stealer logs, each row carrying its source name and date.
  • Social account checks across 700+ platforms and US people search come in the same account.
  • Anyone who controls an email address can suppress the rows keyed to it through a published takedown page.

Which to use.

Use Hudson Rock when

  • When you need to monitor every employee, customer and partner of an organization from one dashboard
  • When you need compromised identities to trigger session revocation in Okta, Azure AD or Auth0
  • When you need threat feeds to block infostealer C2 or phishing infrastructure
  • When you need supply-chain or industry-level infostealer exposure for third-party risk work
  • When you need prospect lists of compromised companies for a security sales team

Use Seer when

  • When you need to search one identifier yourself today at a published price
  • When you need to browse what a single infected device captured, file by file
  • When you need breached credentials and stealer logs in the same search
  • When you need username or phone checks across social platforms
  • When you need US public-records results alongside exposure data

Questions.

Is Hudson Rock free?
Hudson Rock offers free tools that check a domain, email, username or Android app against its infostealer data, plus a free account that tracks up to 3 emails, 3 domains and 3 usernames. Cavalier and the full API are sold through sales, with pricing not published. Seer has a free plan with 10 searches a day and masked values.
What does the Hudson Rock free email lookup show?
It reports whether the email is tied to an infostealer-infected computer, with details such as compromise date, computer name, operating system and counts of stolen services. Seer shows masked device records on its free plan and unmasked ones on Premium.
Can Hudson Rock and Seer both search stealer logs?
Yes. Hudson Rock searches its infostealer database by domain, email, username, password, IP and stealer ID, and Cavalier lets customers browse a machine's stolen files. Seer searches device records by email, username, domain, password, IP or email domain, and Premium unlocks the full archive tree.
Does Hudson Rock have an API?
Yes. Hudson Rock offers a REST API with account-level keys and a free development key on request with a corporate email. Seer includes an API key on Premium and Team, documented with an OpenAPI 3 file.
Which is better for an enterprise security team?
Hudson Rock is built for organization-wide programs: domain dashboards, IdP-driven response, threat feeds, supply-chain monitoring and SSO. Seer fits teams that want self-serve, per-identifier search across stealer logs, breached credentials, social accounts and US people search.
Can I remove my data from Hudson Rock or Seer?
Hudson Rock's privacy policy lists a right to request deletion of certain personal data. Seer suppresses rows keyed to an email you confirm control of through its takedown page, though this does not reach the original breached source.

Other comparisons.

Start with one identifier.

Free runs 10 searches a day across breach and device records, and 10 each for people search and social. Withheld credentials unlock two a week, or a paid plan reveals them outright.