V
VSinch vs Zadarma
Pricing, features, platforms and who each one suits — side by side.
S
Choose Sinch if…
- you're in its core audience: developers, enterprises
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 Sinch Zadarma
Pricing modelFree trialFreemium
Starting price—$4/mo
Free plan
Free trial
API
Open source
PlatformsWeb, APIWeb, API
CategoryCPaaS & OTP APIsCloud phone systems & VoIP
CompanySinchZadarma
Full feature lists
S Sinch
- SMS, MMS, RCS and WhatsApp messaging APIs
- Voice API, SIP trunking and in-app voice and video SDKs
- Email APIs and email platform
- Phone number verification API
- Number provisioning in 190+ countries
- Chatbot builder and contact center applications
- Serverless Functions runtime and CLI
- MCP server and plugins for AI coding tools
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.
Sinch · sinch.com
Zadarma · zadarma.comWhat you'd pay
The cheapest plan that fits, per month, billed yearly where the plan offers it.
| Team size | Sinch | 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
Sinch
SMSPay-as-you-go
VoicePay-as-you-go
RCSPay-as-you-go
FunctionsStarts free
Zadarma
Virtual PBXFree
Unlimited PBXFrom $4/user/mo
Strengths and limitations
Sinch
- Direct connections to 600+ operators
- 99.99% uptime claimed across 190+ countries
- SMS, voice and RCS are billed pay-as-you-go
- Messaging, voice, email and verification on one platform
- Rates vary by country and channel, with no flat plans
- Custom solutions require contacting sales
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
VV
Free trial
V
Voice, video, messaging and verification APIs for developers and businesses
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
Free trial
T
Phone number lookup API for validation, line type and fraud signals
Number lookup & HLRAPI
T
TT
Paid
T
Pay-per-query phone number API for carrier, line type, LRN and CNAM data
Number lookup & HLRAPI
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