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{{NoteTA
|G1=IT
}}
{{Infobox software
|name=Dropbox
|logo=Dropbox logo 2017.svg
|logo caption=Dropbox官方標誌
|other_names=Evenflow
|author={{Br separated entries|[[德魯·休斯頓]]|{{Internal link helper/en|阿拉什·費道斯|Arash Ferdowsi}}}}
|released={{Start date and age|2008|9|p=yes}}
|programming language=[[Python]]
|operating system={{Slight-pause mark list|[[macOS]]|[[Microsoft Windows]]|[[iOS]]|[[Android]]}}
|language count=22
|language={{Slight-pause mark list|[[英國英語]]|[[繁體中文]]|[[簡體中文]]|[[日本語]]|[[韓語]]|[[泰語]]|[[烏克蘭語]]|[[法語]]|[[意大利語]]|[[荷蘭語]]|[[挪威語]]|[[西班牙語美洲]]}}
|genre=[[在線備份]]
|license=[[專有軟件]]
|website={{Official URL}}
}}
'''Dropbox'''是[[美国]]的[[网盘]]公司。2007年5月，[[麻省理工学院]]学生[[德魯·休斯頓]]和{{le|阿拉什·費道斯|Arash Ferdowsi}}创立此公司，时名Evenflow, Inc.，于2009年10月更名为Dropbox，总部位于美国[[加利福尼亚州]][[旧金山]]。

Dropbox通过[[免費增值|免费增值模式]]营运，提供线上存储服务，通过-{zh-hans:[[云计算]]; zh-hant: [[雲端儲存]]}-实现互联网文件[[同步]]，用户可以存储并[[共享]]文件和文件夹<ref>{{cite web | author = Mark Hendrickson | title = Dropbox: The Online Storage Solution We’ve Been Waiting For? | publisher = TechCrunch | url = http://www.techcrunch.com/2008/03/11/dropbox-the-online-storage-solution-weve-been-waiting-for/ | accessdate = 2010-03-30 | archive-date = 2012-04-20 | archive-url = https://www.webcitation.org/673Y7xlGS?url=http://techcrunch.com/2008/03/11/dropbox-the-online-storage-solution-weve-been-waiting-for/ | dead-url = no }}</ref>。在云存储领域的竞争对手包括谷歌公司的[[Google Drive]]、微软公司的[[OneDrive]]和亚马逊公司的[[亚马逊云计算服务|AWS]]等。

Dropbox于2018年3月23日在美国[[纳斯达克]]上市交易，股票代码是DBX，发行3600万股股票，发行价21美元。<ref>{{cite web |title=Dropbox 上市首日股价涨幅高达 36%，市值超过 120 亿美元 |url=https://www.leiphone.com/news/201803/aBRcAYw3B8ye1jzw.html |author=蓝小茗 |date=2018-03-24 |accessdate=2018-03-25 |archive-date=2018-03-25 |archive-url=https://web.archive.org/web/20180325143003/https://www.leiphone.com/news/201803/aBRcAYw3B8ye1jzw.html |dead-url=no }}</ref>Dropbox在2017年[[营业收入]]11.1亿美元，注册用户超过5亿，净亏损1.117亿美元。

== 功能 ==
Dropbox通过免费增值模式盈利，超过90%的收入来自个人用户购买订阅。免费用户提供2[[Gigabyte|GB]]容量，可邀請他人加入获得额外空间。

用户可以通过Dropbox[[桌面]]應用軟件同步到雲端，<ref>{{cite web | author = Ryan Paul | title = How Dropbox ended my search for seamless sync on Linux | publisher = Ars Technica | url = http://arstechnica.com/news.ars/post/20080914-how-dropbox-ended-my-search-for-seamless-sync-on-linux.html | accessdate = 2010-03-30 | archive-date = 2012-04-20 | archive-url = https://www.webcitation.org/673YA2dSz?url=http://arstechnica.com/software/news/2008/09/how-dropbox-ended-my-search-for-seamless-sync-on-linux.ars | dead-url = no }}</ref>也可以通过网页浏览器来手工上传文件。<ref>{{cite web | author = Scott Dunn | title = Dropbox File Sync Service | publisher = PC World | url = http://www.pcworld.com/article/149058/dropbox_file_sync_service.html | accessdate = 2010-03-30 | archive-date = 2012-04-20 | archive-url = https://www.webcitation.org/673Y90NwK?url=http://www.pcworld.com/article/149058/dropbox_file_sync_service.html | dead-url = no }}</ref>支持恢复历史纪录，即使文件被删，也可以从任何一个同步计算机中得以恢复。<ref>{{cite web | work = Dropbox FAQ | title = Can I undelete files and recover old versions of files? | publisher = Dropbox, Inc. | url = https://www.dropbox.com/help/11 | accessdate = 1 January 2010 | archive-date = 2010-03-16 | archive-url = https://web.archive.org/web/20100316192706/http://www.dropbox.com/help/11 | dead-url = no }}</ref><ref>{{cite web | author = Adam Pash | title = Dropbox Syncs and Backs Up Files Between Computers Instantaneously | publisher = Lifehacker | url = http://lifehacker.com/397778/dropbox-syncs-and-backs-up-files-between-computers-instantaneously | accessdate = 2010-03-30 | archive-date = 2012-04-20 | archive-url = https://www.webcitation.org/673YAcqyr?url=http://lifehacker.com/397778/dropbox-syncs-and-backs-up-files-between-computers-instantaneously | dead-url = no }}</ref>用户可通过版本控制使得多人参与编辑、发布文件，<ref>{{cite web | author = Jason Snell | title = Throw your stuff in Dropbox | publisher = Macworld | url = http://www.macworld.com/article/138810/2009/02/mwvodcast93.html | accessdate = 2010-03-30 | archive-date = 2012-04-20 | archive-url = https://www.webcitation.org/673YBXqjS?url=http://www.macworld.com/article/1138810/mwvodcast93.html | dead-url = no }}</ref>版本纪录历史仅限于30天，付费可以实现无限版本纪录，即"Pack-Rat"。<ref>{{cite web | title = What is Pack-Rat? | publisher = Dropbox | url = https://www.getdropbox.com/help/113 | accessdate = 2009-10-24 | archive-date = 2009-09-23 | archive-url = https://web.archive.org/web/20090923012858/http://www.getdropbox.com/help/113 | dead-url = no }}</ref>

为节省[[带宽]]和时间，版本纪录使用[[差分编码]]技术。当用户Dropbox文件夹中的文件发生变化后，Dropbox只上传改变的文件部分，并实施同步。<ref>{{cite web | url = https://www.dropbox.com/help/8 | work = Dropbox FAQ | title = Does Dropbox always upload/download the entire file any time a change is made? | accessdate = 2010-03-30 | quote = Before transferring a file, we compare the new file to the previous version and only send the piece of the file that changed. | archive-date = 2009-12-27 | archive-url = https://web.archive.org/web/20091227205815/http://www.dropbox.com/help/8 | dead-url = no }}</ref>由桌面客户端对单个文件大小不作限制，网站上传的大小上限300MB。<ref>{{cite web | url = https://www.dropbox.com/help/5 | work = Dropbox FAQ | title = Is there a limit or maximum to how big my files can be? | publisher = Dropbox, Inc. | quote = Files uploaded to Dropbox via the desktop application have no file size limit. There is, however, a 300MB cap on files transferred via the website. | accessdate = 2010-03-30 | archive-date = 2010-03-04 | archive-url = https://web.archive.org/web/20100304134944/http://www.dropbox.com/help/5 | dead-url = no }}</ref>Dropbox使用[[Amazon.com|亚马逊]]的[[Amazon S3|S3]]存储系统来存放文件<ref>{{cite web | url = https://www.dropbox.com/help/7 | work = Dropbox FAQ | title = Where are my files stored? | publisher = Dropbox, Inc. | quote = All files stored online by Dropbox are encrypted and kept securely on Amazon's Simple Storage Service (S3) in data centers located along the east coast of the United States. | accessdate = 2010-03-30 | archive-date = 2010-12-23 | archive-url = https://web.archive.org/web/20101223001938/http://www.dropbox.com/help/7 | dead-url = no }}</ref>，并采用[[SoftLayer]]技术来構建后端的基础设施。Dropbox创业初期获得了[[Y Combinator (公司)|Y Combinator]]和[[紅杉資本]]（Sequoia Capital）兩家[[創投公司]]的[[种子基金]]。<ref>{{cite web | title = Dropbox: About Us | publisher = Dropbox | url = https://www.getdropbox.com/about | accessdate = 2010-03-30 | archive-date = 2009-08-03 | archive-url = https://web.archive.org/web/20090803073248/http://www.getdropbox.com/about | dead-url = no }}</ref>

2012年11月，Dropbox 用户突破1亿；2013年11月，Dropbox 用户突破 2 亿；2014年5月，Dropbox用户突破3亿；2015年6月，Dropbox用户突破4亿。2017年末，Dropbox注册用户5亿人，营收为11.1亿美元，自由支配现金流为 3.3亿美元。

2015年10月15日，Dropbox发布了Dropbox Paper文件协同编辑服务。

2019上半年，Dropbox 推出了一項新的服務「Dropbox Transfer」，其功能有別於將檔案儲存在你自己的 Dropbox 帳號當中，而是讓你可以在上傳檔案之後，將檔案以連結的方式，分享給其他人觀看、下載。<ref>{{Cite web|title=Dropbox Transfer - 上限 100 MB ~ 100 GB 線上檔案免費快傳，不限對象又安全的傳送大型檔案|url=https://techmoon.xyz/dropbox-transfer/|accessdate=2019-12-31|work=TechMoon 科技月球|language=zh-TW|archive-date=2019-12-31|archive-url=https://web.archive.org/web/20191231122315/https://techmoon.xyz/dropbox-transfer/|dead-url=no}}</ref>

== 收购 ==
Dropbox通过收购迅速扩大规模并积累技术储备，以云存储为基础，收购垂直领域的SaaS级服务。已经收购超过20家初创企业。

2014年5月，Dropbox宣布收购照片技术开发商Bubbli。[[Bubbli]]开发了一些新颖的方式将3D技术与传统的2D照片查看方式融合到一起。<ref>{{cite web | url = http://finance.sina.com/gb/tech/sinacn/20140520/17181037511.html | title = Dropbox收购Bubbli：集成3D照片技术 | accessdate = 2014-05-21 | 4 = | archive-date = 2014-05-22 | archive-url = https://web.archive.org/web/20140522233431/http://finance.sina.com/gb/tech/sinacn/20140520/17181037511.html | dead-url = no }}</ref>

2019年1月，Dropbox以2.3亿美元现金收购电子签名公司HelloSign，这将扩大其工作流程相关产品组合。

== 安全 ==
Dropbox同步采用[[SSL]]传输数据，而存储则通过[[高级加密标准|AES]]-256进行加密。<ref>{{cite web | url = http://www.dropbox.com/features | title = Dropbox Features, Security section | accessdate = 2010-03-30 | ref = security | archive-url = https://web.archive.org/web/20091227123828/http://www.dropbox.com/features | archive-date = 2009-12-27 | dead-url = yes }}</ref>

2019年12月，Windows版Dropbox客户端软件被曝光安全漏洞，黑客可取的Windows权限以执行任意程式。

2010年5月10日，中国大陆封锁了Dropbox，包括[[Internet Protocol|IP]]封鎖和網址[[關鍵字]]過濾。2014年2月，Dropbox恢复使用，但2014年6月中旬，Dropbox被列入[[域名服务器缓存污染|DNS污染]]。<ref>JON RUSSELL. [https://thenextweb.com/asia/2014/06/19/dropbox-blocked-china-ending-four-month-period-access/ Dropbox is blocked again in China, both apps and web-based service appear affected] {{Wayback|url=https://thenextweb.com/asia/2014/06/19/dropbox-blocked-china-ending-four-month-period-access/ |date=20180826165714 }}. ''thenextweb.com'' 2014-06-19. [2019-01-08].</ref>

==主要競爭對手比較==
{{Comparison of file hosting services}}

== 類似服務 ==
{{div col|cols=3}}
* [[Mega]]
* [[ASUS WebStorage]]
* [[SugarSync]]
* [[Ubuntu One]]
* [[iCloud]]
* [[快盘]]
{{div col end}}

== 參見 ==
* [[網路硬碟]]
* [[雲端儲存]]
* [[協作軟體]]

== 參考文獻 ==
{{refs|2}}

==外部链接==
*{{Official website}}
{{网盘}}
{{YC companies}}
{{DEFAULTSORT:Dropbox (Storage Provider)}}
[[Category:数据同步]]
[[Category:MacOS軟體]]
[[Category:Linux软件]]
[[Category:文件共享服务]]
[[Category:云存储]]
[[Category:在线备份服务]]
[[Category:被防火长城封锁的网站]]
[[Category:美国私营公司]]
[[Category:Y Combinator公司]]
[[Category:2007年成立的公司]]
[[Category:2018年首次公開募股]]

Dropbox - 版本历史

imported>糯米花：​// Edit via Wikiplus

imported>糯米花：// Edit via Wikiplus