Best International Calling Services 2025
Comprehensive comparison of the top 7 international calling services. Find the perfect solution for your needs.
🏆 Our Top Pick: Diallo24
Best overall for instant access, transparent pricing, and no downloads required. Up to 80% cheaper than traditional carriers.
2025 Rankings at a Glance
Diallo24
Best for: Instant access, lowest rates, business teams
Best overall for instant access and lowest rates. Perfect for businesses and individuals who want simple, affordable international calling without any downloads.
Skype
Best for: Video calling, messaging, Microsoft users
Good for video and messaging, but more expensive and requires download. Best if you need full communication suite.
Best for: Calling other WhatsApp users
Great for free calls to friends/family with WhatsApp, but cannot call regular phone numbers. Not a professional solution.
Google Voice
Best for: US-based calling
Good for US domestic calling, but limited international reach. Not suitable for users outside the US.
Viber
Best for: International app users
Similar to WhatsApp but less popular. High rates for calling regular numbers.
Rebtel
Best for: Specific country corridors
Niche service with good rates to specific countries, but limited overall coverage and requires download.
Traditional Carriers (AT&T, Verizon)
Best for: Convenience for existing customers
Most expensive option by far. Only use for emergency calls. Not recommended for regular international calling.
Detailed Comparison
Diallo24
- No download required - instant browser access
- Up to 80% cheaper than competitors
- Setup in 30 seconds
- Voice only (no video or messaging)
- Newer brand
- Limited to phone calls
Skype
- Video calling and screen sharing
- Instant messaging
- Free Skype-to-Skype calls
- Requires app download
- More expensive rates
- Longer setup time
- Free calls to other WhatsApp users
- Popular worldwide
- End-to-end encrypted
- Both parties need WhatsApp
- Cannot call regular phone numbers
- Requires app download
Google Voice
- Free US calling
- Voicemail transcription
- Google ecosystem integration
- US-only service
- Limited international coverage
- Not available worldwide
Viber
- Free Viber-to-Viber calls
- Popular in some regions
- Messaging included
- Requires app download
- Expensive rates for non-Viber calls
- Less popular than competitors
Rebtel
- Good rates to specific countries
- Local number features
- Subscription options
- Requires app download
- Limited coverage
- Variable quality
How to Choose the Right Service
Choose Diallo24 if you want:
Instant access without downloading any apps The absolute lowest rates for international calling No subscriptions or hidden fees Professional calling for business teams
Consider alternatives if you need:
- Video calling: Choose Skype or Google Meet
- Free app-to-app calls: Choose WhatsApp or Viber
- US-only calling: Google Voice may work
- Carrier integration: AT&T or Verizon international plans
Start with the #1 Rated Service
Try Diallo24 risk-free with $2 free credit. No download, no credit card required. Start calling in 30 seconds.
Get Started Free - Ranked #1 in 2025