NumBuster
7.6#5 in spam call blocking appsFree planFree planAndroidiOSWeb
VisitNumBuster vs RoboKiller
RoboKiller
8.1#1 in spam call blocking appsFrom $31.99 a yearFree planAndroidiOSWebAPI
VisitWhat both publish
| Fact | NumBuster | RoboKiller |
|---|---|---|
| Company legal name | The service is operated by GOODLINE SOFTWARES W.L.L., commercial registration 175788-1. | Crunchbase identifies the legal name as Teltech Systems, Inc. |
| Licence | The software is proprietary and the terms grant users a non-exclusive licence to access the service. | RoboKiller describes patented and proprietary blocking technology and publishes no open-source code or open-source licence. |
| Ownership news | Wikipedia states that Goodline Softwares W.L.L. acquired the project in 2025. | A January 10, 2024 release says Bending Spoons agreed to acquire IAC’s Mosaic Group assets, including RoboKiller and its intellectual property, for an undisclosed amount. |
| Purpose | NumBuster identifies unknown callers and helps protect users from phone fraud, spam, and unwanted messages. | Robokiller blocks spam calls and texts and promotes a spam-call-free phone experience. |
| Rating on Apple App Store | 4.4 out of 5 from 409 ratings | 4.5 out of 5 from 414K ratings |
| Rating on Google Play | 4.7 out of 5 from 269K reviews | 3.8 out of 5 from 125K reviews |
| Rating on Trustpilot | 2.8 out of 5 from 3 reviews | 1.5 out of 5 from 330 reviews |
NumBuster plans
- FreeFree
- LIGHT—
- PRO+—
- SMART—
RoboKiller plans
- FreeFree
- Weekly Protection$4.99 a month
- Annual plan discount$31.99 a year
- Premium annual$31.99 a year
- Annual Protection$39.99 a year
Pick NumBuster if…
NumBuster suits mobile users who need caller identification, number checks, spam protection, or community ratings for suspicious numbers. It is also useful for people wanting browser-based checks or iPhone blocking, subject to regional and platform availability.
Pick RoboKiller if…
It suits iPhone and Android users seeking to screen spam calls and filter texts. Users wanting Answer Bots or Call Screening need a carrier and plan that support Conditional Call Forwarding.