Posted on 26/05/26 01:22 pm
Both get the job done for some things. The difference is what happens when the platform you're verifying actually checks the number type.
Quackr is probably the most searched name in temporary phone numbers right now. Clean site, mobile app, free numbers with no signup. It looks like the obvious pick. And for some things, it is.
But there's a gap between what Quackr offers and what SMS Pin Verify offers that most people don't see until a verification fails. This post covers that gap plainly.
We run SMS Pin Verify. We're going to try to be fair about Quackr because you'll make a better decision with accurate information.
Already know what you need? Grab a free or paid non-VoIP number directly.
Both services have a free tier. But they're not the same thing.
Quackr's free numbers are VoIP. Public inbox, shared with anyone on the site, and internet-based rather than carrier-registered. That last part matters. When a platform runs a carrier check before sending a verification code, VoIP numbers get rejected before anything happens. The code never goes out. You just get an error saying the number isn't supported.
SMS Pin Verify's free numbers are non-VoIP. Real carrier-registered US and UK numbers, listed on the front page, no account needed. The inbox is public and shared, same as Quackr's free tier. But the number type is different. They pass carrier checks that Quackr's free numbers can't.
So if you've tried a free Quackr number and got rejected, switching to a free number here often fixes it without spending anything.
That "number not supported" error isn't random. It's a carrier lookup telling you the number type failed. Non-VoIP numbers pass it. VoIP numbers don't.
Quackr has earned its user base. Their paid private rentals work well for a lot of social app verifications. The mobile app is polished. Support response times come up positively in reviews a lot. And they have API access for developers, which most services in this space don't offer.
If you're verifying something on a platform that doesn't run a strict carrier check, Quackr's paid tier is a reasonable option. The experience is smooth and the price is fair.
All of Quackr's numbers are VoIP. Free and paid. They say so themselves on their site.
That's fine until you're trying to verify something that checks. PayPal, Coinbase, Binance, LinkedIn, Cash App, WhatsApp. These platforms run carrier lookups. VoIP numbers fail them. It doesn't matter if the inbox is private or which country the number is from. The number type is the problem.
WhatsApp and Google have also gotten stricter over the past year or two. Numbers that worked on those platforms eighteen months ago often don't work now. That's not a Quackr-specific issue, it's a VoIP-wide issue. But it shows up in their reviews.
Their Android app rating sits at 3.0 out of 5 across over 1,300 ratings. Plenty of complaints about codes not arriving or numbers getting rejected on specific apps. Compare that to their Trustpilot score and you can see the experience is inconsistent depending on what you're trying to verify.
If you've tried Quackr and got a "this number type is not supported" error, that's the carrier check talking. Switching to a non-VoIP number is the fix, not trying a different Quackr number.
Every number on this service is carrier-registered and non-VoIP. Free and paid. That's the thing that makes them work on financial platforms and stricter apps where Quackr's numbers get turned away.
The paid tier adds private inboxes, more countries, and numbers matched to specific services. Support runs through WhatsApp and Telegram directly, which matters when you're racing a five-minute code window and something isn't working.
There's no mobile app yet. That's a real gap compared to Quackr. The dashboard is web-based. For some people that's fine, for others it's an inconvenience worth noting.
| Category | Quackr | SMS Pin Verify |
|---|---|---|
| Free tier | Yes, no signup | Yes, no signup |
| Free number type | VoIP | Non-VoIP |
| Paid number type | VoIP | Non-VoIP |
| Private inbox | Paid tier only | Always on paid |
| Financial apps | Fails carrier check | Works reliably |
| Social apps | Works for many | Works reliably |
| Mobile app | iOS and Android | Android |
| Developer API | Yes | Yes |
| Support | Ticket system | WhatsApp and Telegram |
Consider Quackr if
Use SMS Pin Verify if
Quackr is a real service with real users. The mobile app is better than most competitors. For low-stakes verifications on platforms with loose checks, it's a fair option.
But their numbers are all VoIP. And that ceiling matters the moment you're trying to verify something that actually checks the number type.
SMS Pin Verify is non-VoIP across both tiers. That's it. That's the difference. If the platform you're trying to verify with doesn't care about number type, either service will likely work. If it does care, the choice gets a lot simpler.
Most people don't know their verification failed because of number type. They just know it failed. Switching from VoIP to non-VoIP is usually the fix, and it doesn't have to cost anything to find out.
Need a non-VoIP number that passes carrier checks? Start with the free tier or go straight to a private paid number.