Skip to main content
TwinPhoneTwinPhone
料金バーチャル番号エンタープライズ比較ユースケースブログeSIM
料金バーチャル番号エンタープライズ比較ユースケースブログeSIM
ログイン無料ではじめる
言語
TwinPhoneTwinPhone

海外に電話する、いちばん格安な方法。暗号化されてシンプル、どんな回線でも使えます。アプリもSIMも契約も不要。

プロダクト

  • 料金
  • バーチャル番号
  • 2つ目の電話番号
  • エンタープライズ
  • 国番号
  • アプリ認証用の番号

ユースケース

  • ビジネス用の2つ目の番号
  • 旅行中の通話
  • 電話番号認証
  • オンラインデートのプライバシー
  • リモートワーク
  • オンライン販売
  • プライバシー通話
  • 海外留学
  • 海外在住者の通話
  • Skypeの代わり

リソース

  • ブログ
  • 比較
  • ヘルプセンター
  • ブラウザ通話のしくみ
  • 無料の国際電話
  • VoIP選びのガイド
  • Google Voiceの代わり
  • サポート電話番号
  • 国別の無料国際電話

会社情報

  • 会社について
  • お問い合わせ
  • プライバシーポリシー
  • 利用規約

人気の発信先

  • Angolaへの格安通話
  • バングラデシュへの格安通話
  • コロンビアへの格安通話
  • Dominican Republicへの格安通話
  • エジプトへの格安通話
  • エチオピアへの格安通話
  • ガーナへの格安通話
  • Guatemalaへの格安通話
  • Haitiへの格安通話
  • インドへの格安通話
  • ケニアへの格安通話
  • メキシコへの格安通話
  • モロッコへの格安通話
  • Nepalへの格安通話
  • ナイジェリアへの格安通話
  • パキスタンへの格安通話
  • フィリピンへの格安通話
  • ポーランドへの格安通話
  • ロシアへの格安通話
  • セネガルへの格安通話
  • Sri Lankaへの格安通話
  • トルコへの格安通話
  • ウクライナへの格安通話
  • Zimbabweへの格安通話
  • 145か国以上すべて → →

© 2026 TwinPhone. All rights reserved.

Twin-Phone - Listed on Startup FameTwin-Phone - Listed on FazierTwin-Phone - Listed on Smol Launch
プライバシー利用規約CookieImpressum不正利用の報告法執行機関の方へ個人情報を販売しない
All ComparisonsComparison

Google Voice Alternative 2026: Call Abroad From $0.02/min

Google Voice gives you a free US number and free domestic calls. TwinPhone gives you cheap international calls from anywhere in the world. They solve different problems — but if you're making international calls, one is clearly better.

Feature-by-Feature Comparison

FeatureTwinPhoneGoogle Voice
AvailabilityWorldwideUS only
Free domestic callsNoUS/Canada free
International ratesFrom $0.02/minFrom $0.01/min (often higher)
Virtual numbersUS & Canada ($1.60+)US only (free)
EncryptionTLS + SRTPStandard
Call recordingNoBasic
Team featuresShared wallets + analyticsGoogle Workspace only
Transparent per-minute pricingYes (rate shown before each call)Per minute (rounded up)
App requiredNo (browser)No (web or app)
Works on bad Wi-FiAdaptive audioStandard

Where Google Voice Wins

Let's be fair: for US and Canada domestic calls, Google Voice is unbeatable — it's free. If you live in the US and primarily call US numbers, Google Voice does the job at zero cost.

Google Voice also integrates seamlessly with Gmail, Google Calendar, and the rest of the Google ecosystem. If your life runs on Google products, the integration is genuinely useful.

Where TwinPhone Wins

For international calling, TwinPhone wins on almost every metric:

Availability — TwinPhone works from any country. Google Voice requires a US phone number to sign up.

Rates — while Google Voice advertises low starting rates, popular international destinations often cost more than TwinPhone.

Security — TwinPhone encrypts every call with TLS + SRTP. Google Voice uses standard but not specialized encryption.

Virtual numbers — TwinPhone offers numbers in the US and Canada (more countries coming). Google Voice only provides US numbers.

Billing — TwinPhone bills per minute with the exact rate shown before every call, no connection fees and no hidden charges. Google Voice also bills per minute, but international rates are buried and often higher than advertised.

Can You Use Both?

Absolutely. Many users keep Google Voice for free US calls and use TwinPhone for international calls. The two services complement each other well.

Google Voice handles your free US number and domestic calls. TwinPhone handles everything international — cheaper rates, encryption, virtual numbers abroad, and stable calls on poor connections.

Related Resources

  • Google Voice Alternatives for International Calling →
  • Google Voice vs Skype vs TwinPhone →
  • How to Call Brazil from the US →
  • How to Call the Philippines from the US →
  • Virtual Phone Numbers in 40+ Countries →
  • All Calling Rates →

See for yourself

No subscription, no app needed — just open your browser and dial. Rates from $0.02/min.

Try TwinPhone

Common Questions

What people ask about TwinPhone vs Google Voice.

You need a US phone number to create an account. Once set up, you can make outbound calls from abroad but may experience limitations. TwinPhone works from any country with no restrictions.

It varies by country, but TwinPhone is cheaper or equal for most international destinations. Google Voice's advertised low rates often apply only to landlines; mobile rates tend to be higher.

TwinPhone uses dedicated TLS + SRTP encryption on every call. Google Voice uses standard Google infrastructure security. For call privacy specifically, TwinPhone's specialized encryption is stronger.

Related Comparisons

Comparison

Google Voice vs Skype vs TwinPhone — 2026 Comparison

Comparing the three most popular options for international calls. Features, pricing, and availability.

Read comparison →
Comparison

Skype Is Dead — 5 Best Alternatives That Work

Skype shut down in May 2025. Here are the 5 best replacements for international calling, tested and compared for 2026.

Read comparison →
Comparison

WhatsApp vs Viber vs TwinPhone 2026: Call Real Numbers

App-to-app calls are free, but what about calling real phone numbers? A detailed comparison.

Read comparison →
Comparison

TwinPhone vs Rebtel 2026 — Cheaper International Calls?

Two popular international calling services compared side-by-side on price, features, and ease of use.

Read comparison →
View all 11 comparisons →
TwinPhone browser calling interface

Ready to switch?

From $0.02/min. Encrypted. Works on any connection. Start from just $5.

Try Now

登録は無料。カード不要・月額料金なし。14日間返金保証