Side by side
4PSA VoipNow vs Zadarma
Both stand on business phone systems. Which one you can start free with, which one lets you read the code, and what each costs once you pay.
Free plan APILinuxSelf-hosted+1
VoipNow covers PBX, contact-center, collaboration, integration, and deployment needs in one platform. The free edition is narrowly limited, while broader capacity and features use paid plans.
Visit 4PSA VoipNow
Free plan WebWindowsMac+2
Zadarma combines business calling features with web and device apps. Compare the listed plan allowances carefully, since they differ by plan.
Visit ZadarmaThe facts
| 4PSA VoipNow | Zadarma | |
|---|---|---|
| Free plan | Yes | Yes |
| Open source | Not published | Not published |
| Runs on | API, Linux, Self-hosted, Web | Web, Windows, Mac, iPhone, Android |
| Lowest paid plan | On your infrastructure: $145 a month | Office World: $44 a month |
| Plans published | 7 | 3 |
| Maker | Not published | Zadarma |
| Website | 4psa.com | zadarma.com |
| On business phone systems | #11 of 174 | #5 of 174 |
4PSA VoipNow: what it does well
- Multitenant permissions and shared-resource controls
- Voice, video, messaging, fax, and conferencing
- IVR, queues, agents, and supervisor monitoring
- APIs for automation and CRM integration
- Multiple self-hosted and cloud deployment options
What to know first
- Free edition limited to ten extensions
- Advanced features require a license
- Paid plans start at 145.00 USD monthly
- Some listed perpetual-license prices are unavailable
Zadarma: what it does well
- Free Standard plan includes five users.
- Custom call routing is available.
- Voicemail transcription is listed.
- Apps are available for desktop and mobile.
What to know first
- Standard is limited to five users.
- Standard includes 200 MB of storage.
- Corporation USA/Canada costs $88.00 per month.
Alternatives to 4PSA VoipNow Alternatives to Zadarma The whole list