S
SVonage vs Zadarma
Pricing, features, platforms and who each one suits — side by side.
V
Choose Vonage if…
- you work on iOS, Android
- you're in its core audience: software developers, saas product teams
Z
Choose Zadarma if…
- you want a free plan to start with
- you're in its core audience: small businesses, call centers
Side by side
Feature Vonage Zadarma
Pricing modelFree trialFreemium
Starting price—$4/mo
Free plan
Free trial
API
Open source
PlatformsWeb, API, iOS, AndroidWeb, API
CategoryCPaaS & OTP APIsCloud phone systems & VoIP
CompanyVonageZadarma
Full feature lists
V Vonage
- Voice API with IVR, WebSockets and speech-to-text
- Text-to-speech in over 50 languages
- Video API and low-code Meetings API
- Messages API for SMS, RCS and WhatsApp
- Verify API with Silent Authentication
- SIP trunking and in-app voice SDKs
- AI Studio drag-and-drop conversational flow builder
- CAMARA-based network APIs for identity and location
Z Zadarma
- Virtual numbers in 110 countries, including toll-free
- Free virtual PBX with IVR, recording and voicemail
- Free Teamsale CRM with browser calling
- SIP trunking and number porting
- Call tracking and click-to-call widgets
- AI virtual operator available 24/7
- AI speech analytics for calls
- SMS, HLR lookup and eSIM data
Their home pages
What each vendor shows first: the pitch, the plans and the sign-up.
Vonage · vonage.com
Zadarma · zadarma.comWhat you'd pay
The cheapest plan that fits, per month, billed yearly where the plan offers it.
| Team size | Vonage | Zadarma |
|---|---|---|
| 1 person | no published plan | $4 Unlimited PBX |
| 5 people | no published plan | $20 Unlimited PBX |
| 20 people | no published plan | $80 Unlimited PBX |
All plans and prices
Vonage
Free trial. Plan details aren't published.
Zadarma
Virtual PBXFree
Unlimited PBXFrom $4/user/mo
Strengths and limitations
Vonage
- Covers voice, video, messaging and verification in one platform
- Client and server SDKs for web and mobile
- Migration guides from Twilio
- Low-code AI Studio for conversational flows
- Usage-based API pricing makes costs harder to predict
- 10DLC registration needed for US SMS
Zadarma
- Virtual PBX and Teamsale CRM are free
- Numbers available in 110 countries
- Free 24/7 support
- API and integrations with major CRMs
- Calls, numbers and SMS are billed separately from the PBX
More comparisons
Other options to consider
SS
Free trial
S
Messaging, voice, email and verification APIs for businesses and developers
CPaaS & OTP APIsAPI
P
PP
Free trial
P
Voice AI agents and carrier-grade telephony APIs for businesses and developers
AI voice agents & IVRAPI
T
TT
Paid
T
Pay-per-query phone number API for carrier, line type, LRN and CNAM data
Number lookup & HLRAPI
T
TT
Free trial
T
Phone number lookup API for validation, line type and fraud signals
Number lookup & HLRAPI
V
VV
Free, from $29/mo
V
Developer platform to build, test and deploy voice AI agents for phone calls
AI voice agents & IVRFree planAPI
S
SS
Free, from $9.95/mo
S
Business phone numbers in 60+ countries that ring in a mobile app
Virtual phone numbersFree planAPI
Facts from each vendor's public pages, prices checked Nov 13, 2026. Editorial policy