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US PRODUCT RESEARCH

Zadarma

Zadarma combines cloud telephony, country-specific numbers and programmable call events. HubSpot integration records calls against contacts and tickets. Speech recognition and a separate knowledge-based voice agent extend the workflow. Number verification, usage charges and recording policy need checking for the deployment country.

Checked Oct 20, 2026 · 13 official sources · Desk research
Business phone systems
A GOOD FIT WHEN

Small international teams needing local numbers and CRM-linked calling.

  • Country-specific number catalogues
  • Detailed call-event API
  • Knowledge-based AI caller handling
LOOK MORE CLOSELY WHEN

A fully verified emergency-calling or regulated contact-centre deployment is required.

  • Numbers and outbound usage can cost extra.
  • Free-PBX availability has balance top-up conditions.
  • Holiday exceptions, emergency locations and granular recording retention need verification.

CATEGORY-SPECIFIC EVIDENCE

Capabilities, controls and depth.

Scores combine core capabilities and workflow depth. Full support earns full points; limited support earns half. Unverified features create a range, and paid-plan requirements are shown in the evidence. How scoring works →

Business phone systems · 28 features
57–100/100 documented fit
Core capabilities25.6–32 / 32 pts8/10 checks with established status
Workflow depth31.2–68 / 68 pts6/18 checks with established status
Showing fewer rows does not change the score.
Business phone systems · 28 weighted capability checks
Feature / weightSupport, evidence & points
Core capabilityUS numbers or number portingObtain a US business number or transfer an existing number.
4 points maximum		Supported4 / 4 pts

US numbers with verification.

Official documentation · Oct 20, 2026Source
Core capabilityUS business callingMake and receive business calls under a documented US plan.
4 points maximum		Supported4 / 4 pts

US number calling; separate usage tariff.

Official documentation · Oct 20, 2026Source
Depth checkCall-quality or failure diagnosticsInspect call quality or technical failure information for a specific business call.
5.6 points maximum
Ask for a demonstration

Open a problematic call and show the recorded quality or failure information.

A scenario to run with the supplier; not a completed product test.
Supported5.6 / 5.6 pts

End webhook exposes Q.931 failure status.

Official documentation · Oct 20, 2026Source
Depth checkNumber continuity and forwardingForward or reroute an existing business number while changing its device, user, or destination.
6.4 points maximum
Ask for a demonstration

Move or forward a business line and demonstrate where incoming calls now arrive.

A scenario to run with the supplier; not a completed product test.
Supported6.4 / 6.4 pts

Conditional/unconditional forwarding.

Official documentation · Oct 20, 2026Source
Core capabilityDesktop and mobile callingUse business calling through desktop and mobile applications.
4 points maximum		Supported4 / 4 pts

Desktop and mobile apps.

Official documentation · Oct 20, 2026Source
Core capabilityTeam or shared business messagingUse internal team messaging or shared customer messaging.
4 points maximum		Not verified0–4 / 4 pts

Not established in the reviewed documentation.

Not verified · Oct 20, 2026Source
Depth checkLive-call team handoffTransfer an active call to a colleague or shared destination without asking the caller to redial.
5.6 points maximum
Ask for a demonstration

Answer a test call and transfer it to another team member.

A scenario to run with the supplier; not a completed product test.
Supported5.6 / 5.6 pts

Live-call transfer and pickup.

Official documentation · Oct 20, 2026Source
Depth checkShared customer conversation contextLet team members access a shared business conversation or call history with notes or context.
6.4 points maximum
Ask for a demonstration

Show a second team member the earlier customer interaction and its saved context.

A scenario to run with the supplier; not a completed product test.
Supported6.4 / 6.4 pts

Calls recorded on HubSpot contact/ticket.

Official documentation · Oct 20, 2026Source
Core capabilityAuto attendant or IVRRoute callers using menus or automated receptionist rules.
3.2 points maximum		Supported3.2 / 3.2 pts

Voice-menu routing.

Official documentation · Oct 20, 2026Source
Core capabilityGroups, queues or hours routingRoute calls to multiple people or use business-hours routing.
3.2 points maximum		Supported3.2 / 3.2 pts

Queues and hours-based answering.

Official documentation · Oct 20, 2026Source
Depth checkUnanswered-call overflowConfigure an unanswered or over-capacity queue/group to move callers to another destination.
4.8 points maximum
Ask for a demonstration

Leave a queue call unanswered and show the configured overflow route.

A scenario to run with the supplier; not a completed product test.
Not verified0–4.8 / 4.8 pts

Not established in the reviewed documentation.

Not verified · Oct 20, 2026Source
Depth checkHoliday and after-hours exceptionsOverride routine business-hours routing for holidays or explicit exceptions.
4.8 points maximum
Ask for a demonstration

Create a holiday exception and show how its route differs from a normal weekday.

A scenario to run with the supplier; not a completed product test.
Not verified0–4.8 / 4.8 pts

Not established in the reviewed documentation.

Not verified · Oct 20, 2026Source
Core capabilityCRM or helpdesk integrationConnect calling data with a named CRM or support application.
2.4 points maximum		Supported2.4 / 2.4 pts

HubSpot contact calling.

Official documentation · Oct 20, 2026Source
Core capabilityCalling APIs or webhooksUse programmable interfaces to connect phone events or functions.
2.4 points maximum		Supported2.4 / 2.4 pts

Calling API and event webhooks.

Official documentation · Oct 20, 2026Source
Depth checkAutomatic CRM activity loggingWrite call activity into a connected CRM record with a usable contact association.
3.2 points maximum
Ask for a demonstration

Complete a test call and show the automatically logged activity on the matching CRM contact.

A scenario to run with the supplier; not a completed product test.
Supported3.2 / 3.2 pts

Automatic HubSpot call records.

Official documentation · Oct 20, 2026Source
Depth checkCall records outside the phone appRetrieve identifiable call records or call events using an API, webhook, or export.
4 points maximum
Ask for a demonstration

Retrieve a call record externally and identify its caller, time, and outcome.

A scenario to run with the supplier; not a completed product test.
Supported4 / 4 pts

Call IDs, caller, time and outcome.

Official documentation · Oct 20, 2026Source
Core capabilityAI call transcriptionCreate a transcript of a live or completed business call.
2.4 points maximum		Supported2.4 / 2.4 pts

Recorded-call transcription.

Official documentation · Oct 20, 2026Source
Core capabilityAI summaries or follow-up actionsSummarize a call or extract decisions and follow-up tasks.
2.4 points maximum		Not verified0–2.4 / 2.4 pts

Not established in the reviewed documentation.

Not verified · Oct 20, 2026Source
Depth checkAI answers grounded in call contentUse an AI query or extraction capability based on a call’s actual transcript or recording.
3.2 points maximum
Ask for a demonstration

Ask about a decision or fact in a specific call and inspect the matching transcript context.

A scenario to run with the supplier; not a completed product test.
Not verified0–3.2 / 3.2 pts

Transcript keyword/parameter analysis; open-ended answers unverified.

Not verified · Oct 20, 2026Source
Depth checkAdministrative AI processing controlLet an administrator disable or scope AI transcription, analysis, or summaries.
4 points maximum
Ask for a demonstration

Show the setting that limits AI processing for a selected user, line, or call.

A scenario to run with the supplier; not a completed product test.
Not verified0–4 / 4 pts

Not established in the reviewed documentation.

Not verified · Oct 20, 2026Source
Depth checkAutomatically mask sensitive transcript contentDemonstrate "Automatically mask sensitive transcript content" with test data. Show the result, an exception case, and the required plan.
2.5 points maximum
Ask for a demonstration

Demonstrate "Automatically mask sensitive transcript content" with test data. Show the result, an exception case, and the required plan.

A scenario to run with the supplier; not a completed product test.
Not verified0–2.5 / 2.5 pts

This specific check has not been verified. Missing evidence does not mean the capability is absent. Ask for a demonstration in the proposed plan.

Not verified · Oct 21, 2026Source
Depth checkPark a call and retrieve it on another extensionPark an internal test call, retrieve it from another extension, then demonstrate the timeout when nobody retrieves it.
2.5 points maximum
Ask for a demonstration

Park an internal test call, retrieve it from another extension, then demonstrate the timeout when nobody retrieves it.

A scenario to run with the supplier; not a completed product test.
Not verified0–2.5 / 2.5 pts

This specific check has not been verified. Missing evidence does not mean the capability is absent. Ask for a demonstration in the proposed plan.

Not verified · Oct 21, 2026Source
Depth checkSign in temporarily on a shared desk phoneDemonstrate "Sign in temporarily on a shared desk phone" with test data. Show the result, an exception case, and the required plan.
2.5 points maximum
Ask for a demonstration

Demonstrate "Sign in temporarily on a shared desk phone" with test data. Show the result, an exception case, and the required plan.

A scenario to run with the supplier; not a completed product test.
Not verified0–2.5 / 2.5 pts

This specific check has not been verified. Missing evidence does not mean the capability is absent. Ask for a demonstration in the proposed plan.

Not verified · Oct 21, 2026Source
Depth checkDelegate calls on behalf of another userDemonstrate "Delegate calls on behalf of another user" with test data. Show the result, an exception case, and the required plan.
2.5 points maximum
Ask for a demonstration

Demonstrate "Delegate calls on behalf of another user" with test data. Show the result, an exception case, and the required plan.

A scenario to run with the supplier; not a completed product test.
Not verified0–2.5 / 2.5 pts

This specific check has not been verified. Missing evidence does not mean the capability is absent. Ask for a demonstration in the proposed plan.

Not verified · Oct 21, 2026Source
Depth checkPause and resume an active call recordingDemonstrate "Pause and resume an active call recording" with test data. Show the result, an exception case, and the required plan.
2.5 points maximum
Ask for a demonstration

Demonstrate "Pause and resume an active call recording" with test data. Show the result, an exception case, and the required plan.

A scenario to run with the supplier; not a completed product test.
Not verified0–2.5 / 2.5 pts

This specific check has not been verified. Missing evidence does not mean the capability is absent. Ask for a demonstration in the proposed plan.

Not verified · Oct 21, 2026Source
Depth checkMove an ongoing mobile VoIP call to the carrierDemonstrate "Move an ongoing mobile VoIP call to the carrier" with test data. Show the result, an exception case, and the required plan.
2.5 points maximum
Ask for a demonstration

Demonstrate "Move an ongoing mobile VoIP call to the carrier" with test data. Show the result, an exception case, and the required plan.

A scenario to run with the supplier; not a completed product test.
Not verified0–2.5 / 2.5 pts

This specific check has not been verified. Missing evidence does not mean the capability is absent. Ask for a demonstration in the proposed plan.

Not verified · Oct 21, 2026Source
Depth checkRestrict outbound calling destinationsDemonstrate "Restrict outbound calling destinations" with test data. Show the result, an exception case, and the required plan.
2.5 points maximum
Ask for a demonstration

Demonstrate "Restrict outbound calling destinations" with test data. Show the result, an exception case, and the required plan.

A scenario to run with the supplier; not a completed product test.
Not verified0–2.5 / 2.5 pts

This specific check has not been verified. Missing evidence does not mean the capability is absent. Ask for a demonstration in the proposed plan.

Not verified · Oct 21, 2026Source
Depth checkRestrict recording access by IP addressDemonstrate "Restrict recording access by IP address" with test data. Show the result, an exception case, and the required plan.
2.5 points maximum
Ask for a demonstration

Demonstrate "Restrict recording access by IP address" with test data. Show the result, an exception case, and the required plan.

A scenario to run with the supplier; not a completed product test.
Not verified0–2.5 / 2.5 pts

This specific check has not been verified. Missing evidence does not mean the capability is absent. Ask for a demonstration in the proposed plan.

Not verified · Oct 21, 2026Source
Compare in Business phone systems →

AI CAPABILITY CHECK

What does its AI actually do?

Native AI capabilities

A knowledge-based voice agent handles enquiries and transfers callers; speech analytics transcribes recorded conversations.

Official AI source

Documented capabilities

  • Voice answers
  • Human handoff
  • Call transcription

Limits to check

  • Voice cost varies by model/language.
  • Speech recognition is metered.
  • Generative call summaries were not established.

Understand the full price

Regional packages and payment periods vary. Standard has no package fee but numbers/calls and inactive-account PBX conditions apply; obtain a country-specific quote.

Billing basis: usage. Unit: team plus numbers/usage. Currency: USD.

    Verify current pricing with the vendor

    Integrations and deployment

    • HubSpot
    • Microsoft Teams
    • Salesforce
    • Zoho
    • Zendesk

    Security claims require the relevant agreement and technical evidence. This is a review of public documentation.

    US buying context

    Dedicated US numbers and regional usage packages.

    The evidence record

    Dedicated US local-number catalogue.

    Official evidence

    Conditional/unconditional forwarding.

    Official evidence

    Voice menus.

    Official evidence

    Call queues.

    Official evidence

    Pickup and live-call transfer.

    Official evidence

    Desktop and iOS/Android calling.

    Official evidence

    Call recording.

    Official evidence

    Voicemail and scheduled answering.

    Official evidence

    Monitor, barge and whisper.

    Official evidence

    HubSpot calls attach to contacts/tickets.

    Official evidence

    API records contain call IDs, outcome and timing.

    Official evidence

    End webhook includes Q.931 status code.

    Official evidence

    Paid speech recognition; analysis tools included.

    Official evidence

    Knowledge sources and human transfer.

    Official evidence

    Voice agent lists English, German and Polish.

    Official evidence

    Calling within Microsoft Teams.

    Official evidence

    Source library

    1. Plans
    2. PBX
    3. Polish PBX
    4. German PBX
    5. API
    6. AI voice agent
    7. Speech analytics
    8. HubSpot
    9. Teams
    10. US numbers
    11. UK numbers
    12. Polish numbers
    13. German number verification

    Research is based on documentation, not a hands-on performance test. Report a correction.

    EXPLORE THE ALTERNATIVES

    Keep your options open.

    Business phone systems alternatives · highest documented score first.

    79–100/100 documented fit

    Zoom Phone

    Cloud telephony inside the Zoom communications environment with domestic calling choices, routing and AI Companion phone assistance.

    Good fit forCompanies already using Zoom that want phone service integrated with their collaboration workflow.
    See pricingper user per month
    View research
    70–100/100 documented fit

    Dialpad Connect

    A unified calling, messaging and meetings application with live transcription, AI recaps and action items.

    Good fit forTeams that want call intelligence and everyday business communications in the same app.
    Custom quoteper user per month
    View research
    70–100/100 documented fit

    Quo (formerly OpenPhone)

    A shared business phone workspace for calls and texts, with optional Sona AI answering and higher-tier team features.

    Good fit forSmall US/Canada-facing teams organizing customer calls and messages around shared numbers.
    $15.00per user per month · billed annually
    View research

    Plans and feature boundaries

    The feature score covers the product across documented plans. This table shows package differences; it does not claim that every scored feature is included in the starting price.

    PlanPublished priceDocumented inclusionsLimits and conditions
    Standard
    Plan source ↗    		Confirm price
    Usage-based · Confirm billing unit in source
    • PBX
    • CRM integrations
    		5 PBX/CRM users; number and calling costs separate.
    Office
    Plan source ↗    		Confirm price
    Quote · Confirm billing unit in source
    • Expanded recording storage
    • Included recognition allowance
    		10 users; number/minute allowances vary by region.
    Corporation
    Plan source ↗    		Confirm price
    Quote · Confirm billing unit in source
    • Larger number/minute and recording allowances
    		20 users; regional allowance.

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