General
Basic general information about the clients: creator/company, licence/price etc. Clients listed on a light purple background are no longer in active development.
| Client | Creator | Operating system | Cost | Software license | User Interface |
|---|---|---|---|---|---|
| Alpine | University of Washington | Cross-platform | Free | Apache License | TUI |
| Atmail | Atmail.com | Linux | From $199 - 10 users | proprietary | GUI |
| Balsa | Stuart Parmenter | Linux | Free | GNU GPL | GUI |
| Becky! Internet Mail | Rimarts | Windows | $40 | proprietary | GUI |
| BlitzMail | Dartmouth College | Free | BSD | GUI | |
| Citadel | citadel.org | Unix-like | Free | GNU GPL | Web |
| Claws Mail | the Claws Mail team | Cross-platform | Free | GNU GPL | GUI |
| Cone | Courier Mail Server developers | Unix-like | Free | GNU GPL | TUI |
| Courier | Micro Computer Systems, Inc., continued by Rose City Software | Windows | discontinued | proprietary | GUI |
| Elm | Dave D. Taylor, Sydney Weinstein, Bill Pemberton, Michael Elkins, Kari Hurtta | Unix-like | Free | Elm Mail System GPL | TUI |
| EmailTray | Web CEO Corp. | Windows, Android | Free; Paid version starts at $14.95 per year | proprietary | GUI |
| Eudora | Qualcomm | Windows, Mac OS X | Free | Future release Penelope, will be free/open source based on Mozilla Thunderbird | GUI |
| Eureka Email | Sean O'Connor | Windows | Shareware (no time limit), $20 full version | proprietary | GUI |
| Evolution | The GNOME Project | Cross-platform | Free | GNU GPL | GUI |
| FirstClass | Open Text | Free | proprietary | GUI | |
| Forté Agent | Mark Sidell | Windows | $29 Includes a free 3-month Agent Premium News account, Free 30 day trial | proprietary | GUI |
| GNUMail | Ludovic Marcotte and others | Mac OS X, Linux | Free | GNU GPL | GUI |
| Gnus | Gnus team | Cross-platform | Free | GNU GPL | TUI and GUI |
| GroupWise | Novell | Cross-platform | Included with GroupWise mailbox license | proprietary | GUI |
| i.Scribe, InScribe | Memecode | Windows, Mac OS X, Linux | Free (i.Scribe), $20 (InScribe) | proprietary | GUI |
| IBM Lotus Notes | Lotus Software, IBM | Windows, Mac OS X, Linux | $107, includes 1 yr phone support | proprietary | GUI |
| IMP | Horde LLC | Cross-platform | Free | GNU GPL | Web |
| KMail | KDE | Cross-platform | Free, part of KDE Applications | GNU GPL | GUI |
| Apple Inc. | Mac OS X and iOS | Part of Mac OS X and iOS | proprietary | GUI | |
| Microsoft Entourage | Microsoft | Mac OS X | Part of Microsoft Office for Mac | proprietary | GUI |
| Microsoft Office Outlook | Microsoft | Windows, Mac OS X | Part of Microsoft Office, $109 stand-alone | proprietary | GUI |
| Mozilla Mail & Newsgroups | Mozilla Foundation | Free, part of Mozilla Application Suite | MPL, GNU GPL, GNU LGPL tri-license | GUI | |
| Mozilla Thunderbird | Mozilla Foundation | Cross-platform | Free | MPL, GNU GPL, GNU LGPL tri-license | GUI |
| Mulberry | Cyrus Daboo (formerly Cyrusoft International, Inc./ISAMET | Cross-platform | Free, as of version 4.0.5 | Apache License | GUI |
| Mutt | Michael Elkins | Cross-platform | Free | GNU GPL | TUI |
| Netscape Messenger | Netscape Communications | Free | ? | GUI | |
| Netscape Messenger 9 | Netscape Communications | Free | MPL, GNU GPL, GNU LGPL tri-license | GUI | |
| nmh / MH | RAND Corporation | Unix-like | Free | BSD | CLI |
| Novell Evolution | Ximian | Cross-platform | Free | GNU GPL | GUI |
| Opera Mail | Opera Software | Cross-platform | Free, part of Opera | proprietary | GUI |
| Outlook Express | Microsoft | Windows | Free | proprietary | GUI |
| Pegasus Mail | David Harris | Windows | Donationware | proprietary | GUI |
| Pine | University of Washington | Cross-platform | Free | Pine License | TUI |
| Pocomail | Poco Systems | Windows | $40 | proprietary | GUI |
| RoundCube | The RoundCube Team | Cross-platform | Free | GNU GPL | Web |
| SeaMonkey Mail & Newsgroups | SeaMonkey Council | Cross-platform | Free, part of SeaMonkey | MPL, GNU GPL, GNU LGPL tri-license | GUI |
| Spicebird | Synovel | Windows, Linux, BSD | Free | MPL, GNU GPL, GNU LGPL tri-license | GUI |
| SquirrelMail | The SquirrelMail Project Team | Cross-platform | Free | GNU GPL v2 | Web |
| Sylpheed | Hiroyuki Yamamoto | Cross-platform | Free | GNU GPL, GNU LGPL | GUI |
| The Bat! | RitLabs | Windows | $35 (Home Edition), $45 (Professional Edition) | proprietary | GUI |
| Turnpike | Thus PLC (Demon Internet) | Windows | Free for Demon customers, GB£199 inc. VAT otherwise | proprietary | GUI |
| Windows Live Mail | Microsoft | Windows | Free | proprietary | GUI |
| Windows Mail | Microsoft | Windows | Part of Windows Vista | proprietary | GUI |
| YAM | YAM Open Source Team and contributing authors | AmigaOS | Free | GNU GPL | GUI |
| Zimbra | Zimbra | Cross-platform | Free | MPL on server and ZPL (attribution clause) on client | GUI |
| Client | Creator | Operating system | Cost | Software license | User interface |
Read more about this topic: Comparison Of Email Clients
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