Zadarma 

Extremely rude and lousy customer service. Not recommended to use

O pior prestador de serviços VOIP, fiz a portabilidade de 2 números para a gestão deles e passado algum desapareceram na minha area de cliente e quando tentei resolver a situação com o suporte, foi-me dito que tinham sido portados para outro operador. Eu não dei qualquer autorização para essa portabilidade, logo fui enganado. Agora dia 12/10/2025 faz um mês que estou sem os numeros e ainda não me foi dada uma previsão de resolução. Já perdi imensas chamadas e serviços de clientes por causa deste transtorno.

We have offices in Madrid and Berlin, and we wanted one phone system that felt cohesive. Zadarma lets us manage both locations from a single dashboard, while local numbers ring the correct office first. If no one picks up, calls roll to the other office or to the mobile of the person on duty. It feels like one connected organization despite the distance.

Абсолютно не професійна та безпорадна компанія з жалюгідним сервісом, який має всі ознаки характерні для шахрайства. Спочатку вони збирають декілька разів ваші документи, фото з різних ракурсів, потім задають не доречні та не релевантні питання, не відповідаючи на питання клієнта, а після подальшої відмови клієнта надавати не релевантні до замовлення відповіді, просто скасовують ваше замовлення, витративши ваш час та кошти!

Do not use this company — they collect your personal data, including passports, but never approve your accounts. When asked how this personal data is being used, they simply ignore requests and close the chat.
Unfortunately for them, we are an international law firm, and we will be proceeding with legal action in both the EU and the USA against these shady practices.

Scammers, stay away from them

Je suis agréablement surpris par la réactivité sur le remboursement de mon abonnement . Leur système de prise de photos sur passeport m'a refusé 2 fois de suite alors que j'avais tout fait dans les règles. J'ai demandé mon remboursement et en moins d'1 heure j'ai été remboursé par Paypal. Je m'insurge contre ceux qui les traitent de malhonnêtes mon expérience prouve le contraire. J'espère qu'ils feront le nécessaire pour changer de système d'enregistrement qui les desservent.

I tried to set up an account today with Maksym. I am a British citizen who lives in the UK, but I have been told that I can't use this service when vacationing outside the UK, as OFCOM forbids it!! This obviously isn't true, as so many other companies offer this service. Skip this company to find one that provides a seamless international cloud service.

OFCOM doesn’t ban British people making calls in the UK from other countries. You have taken guidance to an extreme conclusion!

We have been experiencing a critical audio dropout issue with our Zadarma number for weeks. Calls made through LiveAgent with Zadarma SIP consistently lose audio after 90–120 seconds, while calls via Zadarma’s own app work fine.

The problem has caused serious business interruptions during peak sales season. Unfortunately, Zadarma’s support has been nothing but an endless back-and-forth. Their team repeatedly insists the issue is “not on their side” and pushes us to LiveAgent. LiveAgent engineers, however, reviewed their side thoroughly and even provided technical evidence indicating the problem is in Zadarma’s routing or media handling.

Making matters worse, Zadarma refuses to work directly with the other party to solve the problem. They will not even provide an email where debug logs could be sent for faster, engineer-to-engineer communication. Instead, we are forced to act as middlemen between two providers — a process that wastes time and delivers no progress.

For a VoIP provider, this lack of accountability and professionalism is unacceptable. If your business depends on reliable, enterprise-grade voice service, I cannot recommend Zadarma.

Dijeron por chat que para poder usar un número colombiano solamente necesito identificarme por mi cédula alemana. Mentira. Rechazado. Quieren más documentos después. Empresa para nada seria.

The company’s reply didn’t acknowledge or respond to the main pain points stated in my review.

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The entire experience from start to finish was horrible. Their customer service reps are lifeless, and at times rude and condescending.

Both numbers I purchased were already flagged as “scam” before I even used them. (Other services I’ve used never had this issue.) When the first number was flagged, I requested a replacement. Instead of simply helping, support asked why I waited a week to report it — even though I wasn’t using that number as caller ID, I was using my own until the system stopped working with my number. So then I started using the number I'd purchased from them only the day before. All of this was documented in the support chats, but they clearly didn’t bother to read.

The second number I purchased was also flagged as a scam on people's caller ID. I tried to overlook it, but then I was suddenly asked for ID verification — seemingly as punishment for requesting the first replacement. I submitted both my driver’s license (with address redacted) and my Texas Attorney General Address Protection card (my legal address). Both were rejected with no explanation, and they never even addressed why my account was flagged in the first place.

In the meantime, I wasted hours paying my assistants while the account was blocked. After investing all that setup time, it ended up being a complete waste of time and resources. I do not recommend working with this company.

Takes 20 days to approve the number. You'll find that out after they already take your documents and your money. If you have any business plans that require speed avoid like the plague.

P.S. The response is below from Zadarma claims some other case (probably to a person with same name), as I have first used the service on September 2nd. That just makes more evident how many such cases happen. The problem is that the 20 day delay is a surprise for everyone and is not part of their marketing package. Thankfully I got a refund and now use a service that gave me a service next day. The support person said the following to me:
"Confirmation takes from 10 to 20 days" That seems to be the problem.

Number is blocked while in verification.

I bought the number, it worked. Installed the trunk on my PBX. Changed all my outgoing and incoming rules. Informed my colleagues how to used it, shared the number with customers.

Then at the end of the day, I notice it's not working. I log in to Zadarma, and there is a message that I need to verify. I ask via chat why nobody informed me about it while registering, they just say, you need to verify. Fine, but the number is blocked...

I ask them what they need, they say a copy of the passport...

I upload that, they reject it, because they need it scanned in a specific way. I scan the way they asked me, then they give me instructions to do it differently. I do that, then I get a new explanation how to make a selfie with my passport and write the date on an A4 paper with Zadarma text... Why don't you say that the first time??

Now, three days later, still no verification, the number is blocked. I need to reroute everything to the old trunks (luckily I didn't cancel those).

On the chat, they all just reply that they can't help with verification.

Super frustrating.

I don't know if the number will work in the future, but I write this to anyone purchasing the number from them to plan a full week of verification process, before applying anything on your PBX.

*Reply after Zadarma's reply* 09-09-2025

I completely understand that you need to verify, I have zero problems with that. But you don't communicate it transparently. I was allowed to use the number for the full work day. And after I made the payments to start using it, you block it. You don't give instructions on how to register, until after the fourth upload.

And the point is that I have installed everything on PBX just before you blocked it.

I see many comments here on Trustpilot about this process, so do something about it.

We’ve had a terrible experience with ZADARMA. Since August 21, 2025, we’ve been trying to verify just one phone number. We submitted all company data, employee photo with passport and current date, and every requested document.

After a week, nothing happened. Our documents were rejected because the date “no longer matched”—but that’s only because support replies once every two days! By the time they review, the date is outdated again.

Slow, incompetent, and unprofessional. I strongly recommend avoiding ZADARMA for business use.

During lockdown, our company moved all communication and collaboration to Microsoft Teams. With Zadarma integrated, we take and transfer calls directly within Teams, see who is available, and even listen to voicemail without leaving the app. Our remote staff feel more connected, and we avoid toggling between multiple tools. It has simplified our tech stack and kept our focus on talking to customers rather than managing software.

I travel between Lisbon, New York and Dubai for client meetings and used to rack up massive roaming charges. With Zadarma’s eSIM, I can activate a local data connection before I land in a new country, and I still call clients from my usual office number. I no longer have to scramble for local SIM cards or worry about surprise bills, and my clients never see a foreign caller ID. It’s eliminated a stressful part of travel and saved hundreds in fees.

We have designers and developers across three countries working on projects part time, and maintaining professional communication used to be messy. Zadarma let us assign each person a virtual extension so clients never dial someone’s personal phone, and when someone finishes a project, we simply disable the line and reassign it with one click. It keeps things professional and preserves privacy. It also makes onboarding and offboarding painless, which is vital for a business that depends on flexible freelance talent.

Zadarma remet en doute les papiers du gouvernement français délivré ! Une assignation aux tribunal sera effectué !

Ein Stern ist noch zu viel.

Kein Impressum.
Keine simple Löschfunktion des Kontos.