SkypeとZoom Phoneの比較

サービスの状態

Skype：提供終了。Zoom Phone：稼働中。提供を終了した個人向けサービスは、以前どれほど優れていても候補にはなりません。アカウントの新規販売は停止し、未使用のクレジットは変換されるか失効し、サポートも終了します。利用していたサービスが終了したためにこのページをご覧になっている場合、比較すべきなのは現在も運営されているサービスです。

接続料

Skype：課金あり。Zoom Phone：なし。接続料は通話時間にかかわらず毎回加算される固定額です。そのため、分単位の比較では最も安く見える短い通話ほど、割合としての負担が大きくなります。接続料が五セントの場合、1分間の通話を10回すると、表示料金から想定される額より五十セント多くかかります。一方、10分間の通話を1回した場合は五セントです。

クレジットの有効期限

Skype：有効期限あり。Zoom Phone：無期限。クレジットの有効期限は、料金表には現れないコストです。一度にチャージする金額が大きいほど、また通話の頻度が低いほど影響が大きくなります。緊急時に備えて購入したまま使われていない残高こそ、利用停止ルールの対象になります。

Skypeの公開情報に基づく内容

• per minute
• $0.049 per call to US/UK/India/Mexico landlines; $0.089 per call to many mobile destinations (Skype Credit, USD, VAT not specified).
• Skype Credit becomes inactive after 180 days without usage but could be reactivated via a dedicated link; Microsoft Q&A notes 180‑day inactivity rule, and users reported expiring balances around the migration to Teams.

Zoom Phoneの公開情報に基づく内容

• per minute for metered outbound calls and for most international destinations.
• none explicitly listed; pricing focuses on per‑minute charges and monthly subscriptions.
• Zoom Phone charges per month for plans; per‑minute charges appear on invoices; no prepaid 'credit expiry' concept for business plans.
• $10/user/month (US & Canada Metered plan).

Skypeの公開情報に基づく内容

Users needed to create or sign in with a Microsoft/Skype account; paid calling required adding Skype Credit or an active subscription.

Zoom Phoneの公開情報に基づく内容

Businesses or users must have a Zoom account and purchase Zoom Phone licenses; admins assign numbers and configure calling for users.

Skypeの公開情報に基づく内容

Offered Skype Credit as pay‑as‑you‑go, and various monthly subscriptions such as country-specific minute bundles and 'Unlimited World' plans for international calls; existing subscriptions are being converted to credit as Skype is retired.

Zoom Phoneの公開情報に基づく内容

US & Canada Metered at $10/user/month (pay‑as‑you‑go domestic calling), US & Canada Unlimited at $15/user/month (unlimited domestic calls), Global Select at $20/user/month for unlimited domestic calling in one of 40+ countries; additional bundles (e.g. Pro Plus, Business Plus) combine Zoom Phone with Zoom Workplace features.

Skype

• United States, landline: $0.023/min (Skype Credit, VAT/tax not specified).
• United States, mobile: $0.023/min (Skype Credit, VAT/tax not specified).
• United Kingdom, landline: $0.023/min (Skype Credit, VAT/tax not specified).
• United Kingdom, mobile: $0.100/min (Skype Credit, VAT/tax not specified).
• India, mobile: $0.015/min (Skype Credit, VAT/tax not specified).
• Mexico, mobile: $0.035/min (Skype Credit, VAT/tax not specified).
• Nigeria, mobile: $0.224/min (Skype Credit, VAT/tax not specified).
• Philippines, mobile: $0.168/min (Skype Credit, VAT/tax not specified).

記録された情報源：www.skaip.org/call-rates/us; www.skaip.org/call-rates/gb; www.skaip.org/call-rates/mx; www.skaip.org/call-rates/in; Zippcall Skype calling rates overview 2025.

Zoom Phone

• United States, landline: From about $0.0242/min on the metered plan for outbound calls; inbound calls are often included.
• United States, mobile: Same metered per‑minute pricing for outbound calls to mobile numbers on the metered plan.
• United Kingdom, landline: International per‑minute rates depend on add‑ons and are documented in Zoom’s rate tables (not visible in snippets); not found here.

記録された情報源：Third‑party analyses of Zoom Phone pricing summarising Zoom’s published tariff sheets; exact per‑destination rates are in Zoom’s own rate‑card PDFs.

Skype

• Offered paid calling from the app to landline and mobile numbers worldwide using Skype Credit or subscriptions.
• Provided free Skype‑to‑Skype voice and video calls over the internet.
• Supported instant messaging, file transfer, and screen sharing alongside calls.
• Available on multiple platforms including mobile apps and desktop clients.
• Offered country‑specific and global flat‑rate subscription plans for frequent international calling.
• Integrated with Microsoft accounts and later migrated paid calling into Microsoft Teams Free with a web dial pad.
• Call rates depended on destination country and number type (mobile vs landline).
• Consumer Skype service is being retired, with end of service set for May 1, 2026, while the dial pad remains via web for paid users.

Zoom Phone

• Cloud PBX with user extensions, direct inward dialing (DID), and call routing.
• Domestic and international calling with metered or unlimited options.
• Integrates with Zoom Meetings and Zoom Workplace for unified communications.
• Supports voicemail, auto‑attendants, ring groups, and call recording.
• Offers add‑ons such as unlimited international calling to select countries and advanced analytics packs.
• Provides clients for desktop and mobile platforms.
• Supports SMS/MMS in supported regions.
• Aimed at business and enterprise customers rather than casual consumer use.

Skype

• User reviews and tech press have long reported dissatisfaction with major UI redesigns of the mobile app, including complaints that the new interface made the app harder to use.
• Criticism over call quality variability, especially on slower or unstable internet connections, appears frequently in third‑party reviews.
• Some users complain about confusion around credit expiry and the 180‑day inactivity rule for Skype Credit.
• Reports of confusion and concern among users about what happens to existing Skype Credit and subscriptions during the announced shutdown and migration to Teams.

Zoom Phone

• Analyst reviews note that advanced call‑centre features and some integrations require multiple add‑ons, raising total cost.
• Metered plan customers can incur additional costs for outbound calls and SMS beyond included allowances.
• Compared with some competitors, reviewers state that international number availability and some automation features are limited at equivalent price points.