Immune
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Consumer challenge alias

Immune vs Radr

Radr proves challenge-response works for one personal alias. Immune brings that model to B2B: many inboxes, team controls, helpdesk routing, SSO, and plans built for companies.

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About Radr

Different jobs

Radr gives individuals a public alias that forwards to a personal inbox after senders complete a CAPTCHA.

CapabilityImmuneRadr
AudienceTeams and companiesIndividuals
ScaleMultiple virtual, group, and user inboxesTypically one personal alias
Admin and billingWorkspace, roles, API, SSO on higher plansPersonal subscription
DestinationsPer-inbox routing to tools and mail hostsForward to a personal mailbox
Challenge optionsCAPTCHA and donation challenges (plan-dependent)CAPTCHA on the public alias

Choose Immune when

Public and shared inboxes are the pain

  • You need company-owned protection for support@ and contact@, not a personal alias.
  • Several addresses and teammates must share one control plane.
  • Destinations include Intercom or a shared ops mailbox, not only a private Gmail.

Radr may still fit when

You need something else

  • You only want a single personal public alias in front of your own inbox.
  • You do not need SSO, API, or multi-inbox administration.

More comparisons

See Immune against other tools

vs SpamHero vs MailRoute vs Proofpoint vs Mimecast vs Barracuda vs SpamTitan vs Microsoft 365 vs Google Workspace vs SaneBox

Protect the inboxes filters leave open

Put a challenge gateway in front of support@, contact@, and the other addresses you publish.

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