Niobium LLC builds CloakID. Our job is simple: keep your real number private while making sure the people who matter still get through.
Your personal phone number is sensitive information. It shouldn't end up in a spam database because you signed up for a newsletter, listed something online, or filled out a form at the gym.
CloakID gives you real US phone numbers you can hand out without consequence — and one you keep private. Incoming calls get screened before your phone rings, and the people you've approved always get through.
We're a small, independent team that shipped our first version in 2026 and spent the year rebuilding it around real users. Today CloakID is live on the App Store, with Android on the way.
Three things make CloakID different from other "second number" apps.
Each persona gets a real, carrier-grade US number. It works for calls, SMS, MMS, and voicemail — not a VoIP fallback or a call-forwarding trick that breaks when you need it most.
Unknown callers hit a short screen based on the persona they're calling. Spam, surveys, and unwanted outreach get filtered. Your phone only rings for calls that make sense.
People you approve — family, friends, colleagues — skip the screen entirely. You stay reachable to the humans who matter, and protected from everyone else.
CloakID is used by people whose phone number showing up in the wrong place has real consequences. Executives handling M&A. Attorneys with adverse parties. Founders with cap-table exposure. People in public life. We don't publish logos; that's the point.
Privacy tools should work. These are the rules we run CloakID by.
7-day free trial. Cancel anytime in the App Store before the trial ends and you won't be charged.