---
description: Thunderbirdを実際に使用したユーザーのレビューから、製品の機能や価格、メリットデメリットをご覧いただけます。類似製品との比較も簡単、ぴったりのSaaSが見つかるはず！
image: https://gdm-localsites-assets-gfprod.imgix.net/images/capterra/og_logo-e5a8c001ed0bd1bb922639230fcea71a.png?auto=format%2Cenhance%2Ccompress
title: Thunderbirdとは？ | 機能や料金、導入事例をご紹介【キャプテラ】
---

現在地表示: [ホーム](/) > [メール管理ソフト](/directory/30553/email-management/software) > [Thunderbird](/software/1013328/thunderbird)

# Thunderbird

Canonical: https://www.capterra.jp/software/1013328/thunderbird

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> メールのフィルタリング、検索、整理を支援するオンプレミスのメール管理プラットフォームです。
> 
> 評価：160人のユーザーによる評価は**4.4/5**。**おすすめ度**で最高の評価。

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## 簡単な統計と評価

| 測定基準 | 評価 | 詳細 |
| **総合評価** | **4.4/5** | 160 レビュー |
| 使いやすさ | 4.3/5 | レビュー全体に基づく |
| カスタマー・サポート | 3.7/5 | レビュー全体に基づく |
| 価格の妥当性 | 4.7/5 | レビュー全体に基づく |
| 機能 | 4.3/5 | レビュー全体に基づく |
| おすすめ率 | 80% | (8/10 おすすめ度) |

## 企業情報

- **キャプテラについて**: Mozilla

## ビジネスコンテキスト

- **価格プラン**: $0.00
- **価格モデル**:  (無料版が利用可能)
- **対象となる企業**: 自営業, 2～10, 11～50, 51～200, 201～500, 501～1,000, 1,001～5,000, 5,001～10,000, 10,000+
- **デプロイとプラットフォーム**: Mac（デスクトップ）, Windows（デスクトップ）, Linux（デスクトップ）, Windows（オンプレミス）, Linux（オンプレミス）
- **サポートされる言語**: 英語
- **利用可能な国**: アメリカ合衆国

## 機能

- アラート／通知
- 署名管理
- 連絡先管理

## Category

- [メール管理ソフト](https://www.capterra.jp/directory/30553/email-management/software)

## 代替製品

1. [Gmail](https://www.capterra.jp/software/202338/gmail) — 4.8/5 (13477 reviews)
2. [Google Workspace](https://www.capterra.jp/software/168389/google-workspace) — 4.7/5 (17618 reviews)
3. [Microsoft Outlook](https://www.capterra.jp/software/1010311/microsoft-outlook) — 4.5/5 (2481 reviews)
4. [Microsoft 365](https://www.capterra.jp/software/58688/microsoft-365) — 4.6/5 (14116 reviews)
5. [Yahoo Mail](https://www.capterra.jp/software/1035225/yahoo-mail) — 4.2/5 (858 reviews)

## レビュー

### "Thunderbird Review" — 5.0/5

> **Leandro** | *2025年12月2日* | コンピュータ・ソフトウェア | おすすめ評価：10.0/10
> 
> **良いポイント**: It offers great security , access and conectivity . Fast , light weight  email client .Also is open source and doesn't spam you
> 
> **改善点**: The Ui it's a little outdated . Sometimes it is difficult to find the way to access some of its features.
> 
> I use it as my main email client , both for personal use and for  work , it feels comfortable .Big plus that they don't spam you

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### "Solid email service especially to integrate with Protonmail Bridge" — 5.0/5

> **Jeffrey** | *2026年5月2日* | 健康、ウェルネス、フィットネス | おすすめ評価：10.0/10
> 
> **良いポイント**: My favorite thing about Thunderbird is this it works with Protonmail which is my preferred email service
> 
> **改善点**: I guess I would like it to have some a few more options for color themes though it probably does have some and I just didn't know where to look
> 
> Really great\! I also like that it has in the settings some options for extensions that will increase its capabilities

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### "Not the best email client" — 3.0/5

> **Ireshyn** | *2025年1月7日* | 研究 | おすすめ評価：5.0/10
> 
> **良いポイント**: The product is free to use and relatively easy to setup
> 
> **改善点**: Many basic features from other email clients are missing and/or hidden.
> 
> I opt to use other email clients over this as it is feature poor.

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### "Good email client, but could be improved" — 4.0/5

> **Hugo** | *2025年5月9日* | Eラーニング | おすすめ評価：7.0/10
> 
> **良いポイント**: If the best OSS email clients, it fast and almost without bug
> 
> **改善点**: Sometimes buggy, slow to open large email of big conversation with a lot of destinations, and conversation history is not always good (the thread construction I mean, being able to read send email and received in a unified way as in GMail)
> 
> Overall pleased but I'll like to see it improved

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### "Amazing for a free product" — 5.0/5

> **Stuart** | *2025年8月23日* | 情報技術、情報サービス | おすすめ評価：10.0/10
> 
> **良いポイント**: I suppose I like the combination of its quality and price-point, as I use a free version. It is a lot more robust than other free software
> 
> **改善点**: Some of the styling is a little bit lacking but I need to be fair and say I've not tried to look for settings to change it so maybe it's better to say default styling is poor.
> 
> I was using another free email client that would not let me use different ports for incoming and outgoing mail so when searching for another one thunderbird looked great and has been very good so far.

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## リンク

- [Capterraで表示する](https://www.capterra.jp/software/1013328/thunderbird)

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| fr-LU | <https://www.capterra.lu/software/1013328/thunderbird> |
| ja | <https://www.capterra.jp/software/1013328/thunderbird> |

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