Zadarma

Zadarma describes itself as cloud business telephony. Its homepage lists virtual numbers in 110 countries, toll-free numbers and mobile numbers that can receive SMS, together with a cloud PBX and SIP trunking. Calls are billed per second, and Unlimited PBX plans start from $4 per user per month. A built-in CRM called Teamsale, browser calling, click-to-call and call tracking are part of the platform.

The about page says services have been offered since 2006 and names three office entities, IP Telecom Bulgaria LTD, SMARTVOICE LTD and VOICE CLOUD S.L., without saying which one is the legal entity. An office address in Burgas, Bulgaria is given. Owner, parent company and registered office are not named on the pages we read, so the country of establishment is not stated by the vendor.

• Numbers in 110 countries. The homepage lists virtual numbers in 110 countries, plus toll-free and SMS-capable mobile numbers. The numbers page shows monthly and yearly prices for each country listed.
• Cloud PBX. The PBX offers IVR, call transfer, pickup and forwarding, call recording, statistics and voicemail. Plans are priced per user, which suits teams that need an extension structure rather than a single number.
• Per-second billing. Calls are billed per second according to the homepage, so short calls are not rounded up to a full minute. The tariff for each destination sits on separate pages.
• SIP trunking. SIP trunking is listed alongside caller ID support, which lets a company connect an existing phone system. The pages we read do not describe the technical limits.
• Teamsale CRM. Teamsale is a built-in CRM with browser calling, customer profiles, deal and task management and a sales pipeline. It reduces the need for a separate tool for small sales teams.
• Click-to-call and call tracking. The homepage lists click-to-call and call tracking for websites. It does not say how tracking numbers are allocated or what reporting looks like.
• Apps on several platforms. Apps are listed for the Apple App Store, Google Play, Windows and Chrome, so a user can take calls on a phone or a computer.

• Small sales teams. Teamsale CRM, browser calling and per-user PBX plans from $4 let a team log calls and deals in one place without adding a separate CRM subscription.
• Businesses entering several markets. With numbers in 110 countries and a US or Canada line at €3.20 a month on monthly payment, a company can add local presence market by market and pay less on yearly billing.
• Companies with an existing phone system. SIP trunking and caller ID support allow an office PBX to route calls through Zadarma, though the pages we read give no migration guidance.

The pages we read describe plans and tariffs rather than a setup procedure. The numbers page shows prices for each country, for example the United States and Canada at €3.20 a month on monthly payment and €1.60 on yearly payment, and the United Kingdom at €4 and €2. Prices are in euros without VAT, and the connection fee for those countries is €0.

The numbers page mentions no trial or starting credit, so a test number costs money from the first month. After choosing a number, install an app for iOS, Android, Windows or Chrome, or use browser calling through Teamsale. Connect a CRM from the integrations list if a team uses one. Ask the vendor how identity checks apply to numbers in countries that require them.

Zadarma has offered services since 2006 and lists an office in Burgas, Bulgaria, though its about page names three entities without saying which is the legal one.

Numbers cover 110 countries; US and Canada lines cost €3.20 a month on monthly payment, half that paid yearly. The pages read show no trial or starting credit, so test calls cost money. Teamsale CRM comes with the platform.

The virtual phone number apps list places Zadarma 2 of 13: Sonetel sits directly above it and Burner directly below. Places 1 to 3 in every list go to challengers where the category has them, so this is a position on that rule and not a score.

The vendor states no country of establishment, so Zadarma is left out of the regional count for this list.

Charging model: Per-user PBX plans and per-number rates published; number prices in euros, lower on yearly payment; billed per second.

The homepage states Unlimited PBX price plans from $4 per user per month. The numbers page prices numbers in euros without VAT and lists two billing options. United States and Canada numbers cost €3.20 a month on monthly payment and €1.60 on yearly payment, and United Kingdom numbers cost €4 and €2. The connection fee for those numbers is €0. Calls are billed per second, with destination tariffs on separate pages we did not read. The numbers page mentions no trial or free credit. Dollar prices on the homepage and euro prices on the numbers page appear side by side, so buyers should confirm the currency and VAT treatment on the order page before paying.

Read from zadarma.com/en when Best Virtual Phone Number Apps in 2026 was last reviewed (13 November 2026).

The homepage describes cloud PBX features such as IVR, call pickup, recording, statistics and voicemail, plus SIP trunking, click-to-call and call tracking.

Integrations named include Zoho CRM, Salesforce, HubSpot, Zendesk, Slack and Telegram.

Apps exist for iOS, Android, Windows and Chrome.

The wide scope suits a small company outgrowing a single-number app.

The about page gives an office address in Burgas, Bulgaria and lists three entities, IP Telecom Bulgaria LTD, SMARTVOICE LTD and VOICE CLOUD S.L. It does not say which is the legal entity and names no owner, parent company or registered office. The pages we read do not describe data storage locations, certifications or encryption, so a buyer handling regulated data should ask the vendor which entity signs the contract.

Integrations the vendor names (11):

• Zoho CRM
• Salesforce
• HubSpot
• Zendesk
• Freshdesk
• Microsoft Dynamics 365
• Shopify
• Slack
• Microsoft Teams
• Facebook Messenger
• Telegram

Also in our records:

• Integrations named include Zoho CRM, Salesforce, HubSpot, Zendesk, Slack and Telegram.

Shared tags and a similar price model decide who is listed here; where none match, the neighbours in the ranking fill in.

• CallHippo (#7 of 13): Best for: Sales and support teams that want CRM sync and numbers in many countries. (India)
• TextNow (#9 of 13): Best for: People wanting a number plus mobile data in one cheap service.
• Google Voice (#13 of 13): Not for: buyers outside Google's supported markets or needing numbers in many countries. Workspace-sold phone numbers with Gmail and Calendar links.

Read from the vendor’s own pages on 12 November 2026.

• zadarma.com/en: Numbers in 110 countries, PBX from $4, per-second billing, Teamsale, apps, integrations
• zadarma.com/en/tariffs/numbers: Euro number prices without VAT, monthly and yearly, connection fee, no trial mentioned
• zadarma.com/en/about: Services since 2006, three entities, Burgas address, no owner named

We test for four things rather than for features: setup time, price in practice, exit and audience. The result for Zadarma: #2, out of 13 ranked. Method and commercial relationships are in our editorial process.