すべての比較比較

Google Voice vs Skype vs TwinPhone — 2026 Comparison

Skype was the king of cheap international calls for over a decade. Google Voice offered a free alternative for US users. Both are now in transition — Skype shut down in 2025, and Google Voice remains US-only. Here's how they compare to TwinPhone in 2026.

著者· Founder and Managing Director, TwinPhone公開 更新

結論

以下の10項目で比較しています。要点を並べて示します。

TwinPhone

  • Availability — Worldwide
  • Rates from — $0.02/min
  • Free domestic calls — No
  • App required — No (browser)
  • Call encryption — TLS + SRTP

Google Voice

  • Availability — US only
  • Rates from — $0.01/min
  • Free domestic calls — US/Canada only
  • App required — No (web)
  • Call encryption — Standard
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A global network of connected international calling routes

項目別の比較

機能ごとの比較
項目TwinPhoneおすすめGoogle VoiceSkype (Teams)
AvailabilityWorldwideUS onlyDiscontinued (Teams now)
Rates from$0.02/min$0.01/min$0.012/min (via Teams)
Free domestic callsNoUS/Canada onlyNo
App requiredNo (browser)No (web)Yes (Teams)
Call encryptionTLS + SRTPStandardStandard
Virtual numbersUS & Canada ($3.19+)US only (free)No
Call recordingOn requestBasicWith Teams plan
Team featuresShared wallets + analyticsGoogle WorkspaceFull Teams suite
Works on bad Wi-FiAdaptive audioAverageAverage
Free trialStart from $10Free US callsNo
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Google Voice: Free US Calls, Limited Internationally

Google Voice is a solid free option if you live in the US and primarily call US and Canada numbers. International rates exist but aren't competitive — popular destinations like India mobile and Philippines mobile cost significantly more than dedicated international calling services.

The biggest limitation: you need a US phone number to sign up, and virtual numbers are only available in the US. If you're outside the US or need to show local numbers in other countries, Google Voice can't help.

Skype Is Dead — Long Live... Teams?

Microsoft shut down Skype in May 2025 and pushed users to Teams. While Teams technically supports PSTN calling, it's designed for enterprise video meetings, not cheap international calls. The interface is cluttered, pricing requires a Microsoft 365 subscription plus a calling plan, and the entire experience feels like using a firehose to water a plant.

If you're a business already paying for Microsoft 365, Teams calling might make sense. For everyone else, it's overkill.

TwinPhone: Built for International Calls

TwinPhone focuses on one thing: making international calls cheap, simple, and secure. No bloated software, no ecosystem lock-in, no monthly subscriptions.

Open your browser, dial a number, pay per minute. Every call encrypted. Works on slow Wi-Fi. Virtual numbers in the US and Canada. That's it.

The pay-as-you-go model means you only spend money when you actually call. $10 of credit can last weeks or months depending on your usage.

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よくある質問

Google Voice vs Skype (Teams) vs TwinPhoneについてよくある質問。

Microsoft migrated Skype users to Teams, but for simple international calls, TwinPhone is a better replacement — cheaper rates, simpler interface, no subscription required.

No. Google Voice only offers free calls to US and Canada. International calls are charged per minute at rates that are often higher than dedicated services like TwinPhone.

TwinPhone uses adaptive audio that adjusts to your connection quality, maintaining stable calls even on slow Wi-Fi. Google Voice and Teams rely on standard VoIP without specialized optimization for poor connections.

TwinPhone browser calling interface

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