Side by side
Kall8 VoIP 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.
Paid AndroidiPhoneWindows
Kall8 Phone offers core cloud phone features, apps, routing, and team options for small businesses. Review the usage thresholds, metered toll-free calls, and Teams licensing requirements before choosing a plan.
Visit Kall8 VoIP
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
| Kall8 VoIP | Zadarma | |
|---|---|---|
| Free plan | No | Yes |
| Open source | Not published | Not published |
| Runs on | Android, iPhone, Windows | Web, Windows, Mac, iPhone, Android |
| Lowest paid plan | Additional Microsoft Teams user: $11.95 a month | Office World: $44 a month |
| Plans published | 9 | 3 |
| Maker | Kall8 VoIP | Zadarma |
| Website | kall8.com | zadarma.com |
| On business phone systems | #146 of 174 | #5 of 174 |
Kall8 VoIP: what it does well
- Android, iOS, and Windows apps
- Custom call routing and auto attendant
- Multiple business numbers
- Up to three simultaneous calls per user
- 24/7 US-based phone and email support
What to know first
- No free plan or free trial
- Unlimited calling has usage thresholds
- Toll-free calls are metered at 6.9¢ per minute
- Teams calling requires a Teams Phone license
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 Kall8 VoIP Alternatives to Zadarma The whole list