ビジネス電話のおすすめ（2026年）: 22件から選んだトップ3

ビジネス電話のサービスのトップ3

RingCentral and Grasshopper are level on their report cards, and what separates them is how much phone system you need. RingCentral comes first as a full system with phone menus, queues, fax and meetings on computers and phones. Grasshopper is second for a solo owner or small team who wants a business number on their own phones at one flat price. Quo is third for small teams sharing a number and texting a lot. Dialpad narrowly missed: it starts at the same $15 as Quo, billed annually, but is $27 paid monthly. Google Voice is free only for personal Gmail accounts in the US.

1. 1

   1位: RingCentral

   無料トライアル · $20/月 から

   Most businesses that want a full phone system 向け

   RingCentral puts calls, texts, fax, team chat and video meetings for up to 300 people in one app on the web, Mac, Windows, iPhone and Android. Core is $20 per user a month for 1-5 users, billed annually ($30 monthly), with unlimited US and Canada calling, phone menus, call queues and an AI assistant that takes call notes at no extra cost. Its iPhone and iPad app averages 4.83 from about 78,000 ratings. Know the limits: Core allows 25 texts per user a month, automatic recording and CRM integrations need Advanced at $25, and texting is left out of the 14-day trial.

   iPhone・iPad アプリ: App Store で5点中4.8

   RingCentral の料金と詳細
2. 2

   2位: Grasshopper

   無料トライアル · $14/月 から

   A solo owner or small team who wants one flat monthly bill 向け

   Grasshopper gives you a local, toll-free or vanity number that rings through its app on your own phone and computer, with calls, texts and voicemail in one shared inbox. True Solo is $14 a month for one user, and Solo Plus is $25 a month for unlimited users with three extensions, both billed annually. Its iPhone and iPad app averages 4.75 from about 46,000 ratings. It is second because it does a smaller job: there is no web app and no integrations on record, it is sold only in the US and Canada, and texting needs a $19.50 registration fee plus $1.50 a month.

   iPhone・iPad アプリ: App Store で5点中4.7

   Grasshopper の料金と詳細
3. 3

   3位: Quo

   無料トライアル · $15/月 から

   Small teams that share a number and text customers a lot 向け

   Quo, formerly OpenPhone, lets several teammates share one number with a common call and text history, and calls and texts to the US and Canada are unlimited under a fair use policy. Starter is $15 per user a month, billed annually ($19 monthly), on the web, Mac, Windows, iPhone and Android, and its iPhone and iPad app averages 4.4 from about 10,800 ratings. It is third because a team pays per person where Grasshopper charges one flat fee, and phone menus, call transfers, automatic recording and HubSpot or Salesforce need Business at $23 per user ($33 monthly).

   iPhone・iPad アプリ: App Store で5点中4.4

   Quo の料金と詳細

2026/10/17 に、各ツールの掲載情報とそのツールについて語られていることをもとに順位をつけました。私たち自身のテストによるものではありません。 順位のつけ方