NumBuster
NumBuster: A free, cross-platform lookup and blocking tool with community caller data. Ranked #24 of 40 in Spam Call Blocking Apps by our editors (6.6/10); pricing: Free plan; best for free cross-platform caller lookup and basic blocking.
At a glance
- Editor score6.6 / 10
- PricingFree plan
- Best forFree cross-platform caller lookup and basic blocking
- Free planYes
- Facts checked21 Sep 2026
Where it wins
- Free plan with caller ID, lookup, ratings, tags, and reviews
- Available on web, iOS, and Android
- Pattern blocking plus anti-spam SMS functionality
Where it doesn't
- Core features focus more on lookup than call screening
- Robocall blocking is not established by the published feature set
- Paid subscription pricing is not stated here
Our verdict on NumBuster
NumBuster is a caller-identification and phone-number lookup service for people who want information about incoming calls and a way to investigate unfamiliar numbers. It supports caller ID during incoming calls, manual number searches, community ratings and reviews, and user-created tags and emotags. The service is available through the web, iOS, and Android, with phone-number blocking on iPhone and additional mobile features.
The free plan covers the core lookup experience and community information, making NumBuster suitable for users who want basic caller context without committing to a subscription. Optional paid subscriptions add caller-information and privacy tools, although the published product details do not specify plan-by-plan price amounts. Availability can vary by country, operating system, device, provider, and legal circumstances, so the practical experience may differ across setups.
NumBuster’s strongest category fit is its combination of caller lookup, community reports, tags, and blocking controls. Pattern-based blocking can address groups of numbers, while the call-screen information widget and anti-spam SMS functionality extend beyond a simple reverse-lookup tool. Its focus is less clearly centered on dedicated call screening or robocall blocking, so users seeking a deeper automated defense against those call types should consider an alternative. Choose NumBuster for free, cross-platform caller information and basic blocking; look elsewhere if advanced call screening is the main requirement.
Your product? Our editors can test NumBuster in depth and publish a review, labelled as paid · from $149/mo →
NumBuster pricing
NumBuster fact sheet
| Free plan | Yes |
|---|---|
| Paid from | Not verified |
| Robocall blocking | Not verified |
| Caller ID | Yes |
| Call screening | Not verified |
| Community reports | Yes |
| Supported platforms | Both |
| Blocked-number limit | Not verified |
| Deployment | Cloud, Mobile |
| Platforms | Web, iOS, Android |
| Support | Email, Docs |
| Built for | Solo, Small business (editorial estimate) |
| Pricing | Free plan |
| Website | numbuster.com |
| Facts checked | 21 Sep 2026 |
Alternatives to NumBuster
- TruecallerA broad caller ID and spam protection app for iOS and Android.9.3
- T-Mobile Scam ShieldA free core service for T-Mobile customers, with paid call-management upgrades.9.1
- Verizon Call FilterA practical Verizon-integrated blocker with useful free protection and paid caller ID.9.0
See all NumBuster alternatives →
Also Ranked In
NumBuster is ranked in 2 of our directories.
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Featured on iTechGuides
NumBuster is listed in our Spam Call Blocking Apps directory. Add the badge to your site — it links back to this page.
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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
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