All three caller ID apps — Truecaller, Hiya, and Sync.ME — publish your phone number and name to millions of users. Truecaller is the worst offender (286M-user breach in 2019, requires contact upload) followed by Sync.ME (aggressive contact scraping) and Hiya (least invasive but still exposes you via Samsung's built-in caller ID). The right move isn't picking one — it's opting out of all three, which PrivacyOn automates as part of its 100+ site removal service starting at $8.33/month.
Quick Verdict: All Three Are Privacy Nightmares
The Real Problem
Truecaller, Hiya, and Sync.ME all build their databases by scraping phone numbers from public directories, carrier partnerships, and user contact-list uploads. Even if you never install any of them, your number can appear in their systems — complete with your full name — because someone else uploaded their contacts.
At-a-Glance Comparison
| Feature | PrivacyOn (Recommended) | Truecaller | Hiya | Sync.ME |
|---|---|---|---|---|
| Purpose | Removes you from caller ID databases | Caller ID + spam blocking | Caller ID + spam blocking | Caller ID + social profiles |
| Requires contact upload | Never | Yes (historically) | No | Yes |
| Known data breaches | None | 2019 (286M users) | None reported | Historic scraping complaints |
| Powers Samsung caller ID | — | No | Yes | No |
| Opt-out available | Not needed | Yes (unlist + deactivate) | Yes (email DPO) | Yes (web form) |
| Removes from 100+ other broker sites | Yes | No | No | No |
| Family coverage | Up to 5 people | Individual only | Individual only | Individual only |
| Price | $8.33/mo | Free (with ads/data) | Free (with ads) | Free / $5.99/mo premium |
PrivacyOn: The Only Option That Actually Protects Your Number
PrivacyOn isn't a caller ID app — it's a data removal service that takes your phone number out of Truecaller, Hiya, Sync.ME, and 100+ other broker and people-search sites in one automated workflow. For anyone comparing caller ID apps because they're worried about phone privacy, PrivacyOn is the answer to the actual question you're asking.
- Removes you from all three caller ID apps at once instead of forcing you to submit three separate opt-outs
- 100+ data broker and people-search removals so your phone number stops appearing linked to your address, family, and email
- Dark web monitoring included so you're alerted if your number leaks in a breach
- Family plans up to 5 people at one price
- 24/7 monitoring that re-submits removal if your number reappears
Truecaller: The Worst Offender on Privacy
What It Does
Truecaller is the largest caller ID app in the world with roughly 350 million monthly active users, dominant in India, Africa, and the Middle East. It identifies incoming callers and flags spam.
Privacy Problems
- Historic contact-upload model. For years Truecaller required users to upload their entire address book to activate the app. Every uploaded contact — whether they used Truecaller or not — was added to Truecaller's database with a name and number pairing.
- 2019 data breach. 286 million Truecaller records including phone numbers, names, and other personal data were found for sale on the dark web.
- Cross-selling to advertisers. Truecaller's business model is built on monetizing the identity data it collects.
How to Remove Yourself
See our step-by-step Truecaller opt-out guide. You need to unlist your number, then deactivate your account (if you have one), and re-submit if your number reappears.
Hiya: The Least Invasive — But Still Exposes You
What It Does
Hiya provides caller ID and spam blocking through its standalone app AND powers the built-in caller ID feature in the default Samsung Phone app. That last point means hundreds of millions of Samsung Galaxy owners see Hiya-powered results without downloading anything.
Privacy Problems
- Samsung backdoor. Even if you've never installed Hiya, Samsung phones expose your name to millions of Galaxy users when you call them.
- Carrier partnerships. Hiya sources data from AT&T, T-Mobile, and Vodafone. If your number is in your carrier's records, it likely flows into Hiya.
- Incorrect spam labels. Legitimate numbers get wrongly flagged as spam, causing your calls to be blocked or ignored.
What Hiya Does Well
Hiya does not require access to your contact list to function — a real privacy plus. Its opt-out process is also more responsive than Truecaller's.
How to Remove Yourself
See our Hiya opt-out guide. Email DPO@hiya.com with the removal template — processed within 30 days under GDPR and CCPA.
Why readers pick PrivacyOn
100+ broker sites covered, dark web monitoring, and family plans for up to 5 people — from $8.33/mo with a 30-day money-back guarantee.
Start your free scan★★★★★ 4.8/5 · Trusted by thousands of families
Sync.ME: The Social-Aggregating Caller ID App
What It Does
Sync.ME identifies unknown callers and pulls their social media photos and profiles from Facebook, LinkedIn, and other public sources into a unified caller ID card.
Privacy Problems
- Aggressive social scraping. Sync.ME builds richer profiles than Truecaller or Hiya by pulling public social data. That means your LinkedIn photo, Facebook name, and Twitter handle can appear when you call a stranger.
- Contact-list uploads. Sync.ME's app asks for full contact access on install.
- Premium upsell tension. The free tier is ad-supported and pushes users toward a $5.99/month upgrade — monetization pressure that historically correlates with looser privacy defaults.
How to Remove Yourself
See our Sync.ME opt-out guide. Sync.ME requires a web-form removal request and phone-number verification.
Which Should You Choose?
Don't Pick One — Opt Out of All Three
You're not the customer of a caller ID app — you're the product. Your phone number appears in all three databases regardless of which app you personally use. The winning move is to have your number removed from Truecaller, Hiya, and Sync.ME at once. PrivacyOn does exactly that, plus removes you from 100+ other people-search and data broker sites, for $8.33/month.
If You Absolutely Need Caller ID
If you specifically need caller ID for spam blocking on your own phone (a separate concern from being listed in these databases), the built-in options are safer than any third-party app:
- iPhone: Settings → Phone → Silence Unknown Callers
- Android (Google Phone app): Settings → Caller ID & spam → Filter spam calls
- Your carrier: AT&T ActiveArmor, T-Mobile Scam Shield, Verizon Call Filter are all free and don't require sharing your contacts
See our full guide on how to stop robocalls and spam calls.
Frequently Asked Questions
Is Truecaller safe to use in 2026?
Truecaller functions well as a spam blocker but carries real privacy costs: your identity is added to its global database, your contacts may have already been uploaded by other users, and a 2019 breach exposed 286M records. For most users, a carrier-provided spam blocker (AT&T ActiveArmor, T-Mobile Scam Shield) is a safer alternative.
Which caller ID app has the fewest permissions?
Hiya, because it doesn't require access to your contact list to function. Truecaller and Sync.ME both ask for full contact access. But even Hiya still adds your number to a public database via Samsung's default caller ID.
Is there a better alternative to Truecaller, Hiya, and Sync.ME?
Yes. Instead of installing another caller ID app that adds you to yet another database, use your phone's built-in spam blocker plus PrivacyOn to have your number removed from all three of these apps and 100+ other data brokers. PrivacyOn's family plan covers up to 5 people at $8.33/month — less than Sync.ME's premium tier alone. Start a free scan now.
Can I be listed in Truecaller if I never installed the app?
Yes. Truecaller builds its database from user contact uploads. If anyone in your address book has installed Truecaller with contact access, your name and number are likely in Truecaller's database.
Does Samsung use Hiya by default?
Yes. The stock Samsung Phone app on Galaxy devices uses Hiya to power its Caller ID and Spam Protection feature. This means Hiya's data is displayed on hundreds of millions of Samsung phones even if the user never installs the Hiya app.
Do I have to opt out of each caller ID app individually?
Manually, yes. Each service has its own opt-out process. PrivacyOn automates removal across Truecaller, Hiya, Sync.ME, and 100+ other data broker and people-search sites in one workflow, and monitors 24/7 for re-listings.
The Bottom Line: PrivacyOn Beats All Three
Comparing Truecaller vs Hiya vs Sync.ME is really a debate about which company gets to publish your phone number and name. The better question is how do I stop being listed at all? PrivacyOn answers that question — automating removal across all three caller ID apps and 100+ other broker sites, with dark web monitoring and family plans included. Plans start at $8.33/month for up to 5 family members. Get your free scan and see your current exposure.