Comparison of speech synthesizers

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Here is a non-exhaustive comparison of speech synthesis programs :

Creator(s) First public release date Latest stable version Software license Cost
Apple PlainTalk Apple Inc. 1984 2007, October 26 ? ?
Cepstral Cepstral ? ? Proprietary ?
CHIPSpeaking John T. McF. Mood 2000, March 14 2001, January 19 Proprietary Free
CircumReality TTS engine mXac 2003 2009, June 6 Proprietary ?
Dhvani Ozakil Azim
Santhosh Thottingal
...
2005 2008, November 5 GPL Free
DSpeech Dimitrios Coutsoumbas ? ? Freeware Free
eSpeak Jonathan Duddington 2006, February 10 2008, December 23 GPLv3+ Free
Festival Speech Synthesis System CSTR ? ? Open source Free
FreeTTS Paul Lamere
Philip Kwok
Dirk Schnelle-Walka
Willie Walker
...
2001, December 14 2009, March 9 BSD Free
IVONA TTS IVO Software 2005 ? Commercial ?
Japplis Speech Japplis ? 2009, February 28 ? Free
Kurzweil 1000 and Kurzweil 3000 Kurzweil Educational Systems, Inc. 1996 2005 ? ?
Nuance Vocalizer Nuance Communications, Inc. ? ? Proprietary ?
NuSuara Malay TTS NuSuara ? ? ? ?
Praat Paul Boersma
David Weenink
? 2009, June 21 GPL Free
RealSpeak Nuance Communications, Inc. ? 2007 Proprietary ?
SoftVoice TTS SoftVoice, Inc 1979 ? Proprietary ?
Software Automatic Mouth Don’t Ask Software 1982 ? ? USD$50 to $200
Vocoder ? 1930s ? ? ?
Creator(s) First public release date Latest stable version Software license Cost

Technical details

Online demo Available language(s) Available voices(s) Programming language Operating system(s)
Apple PlainTalk ? English (American)
...
15+ ? Macintosh
Cepstral Yes English (American)
English (British)
Italian
French (Canadian)
German
Spanish (American)
25 ? Mac OS X
Windows
i386-Linux
x86-64-Linux
Sparc-Solaris
i386-Solaris
CHIPSpeaking No All Agent 2.0
Interface in English
Any Agent 2.0 voice Visual Basic 6.0 Windows
CircumReality TTS engine Samples English (American) 8 SAPI 5.3 Windows
Dhvani Samples Hindi
Kannada
Marathi
Malayalam
Gujarati
Bengali
Telugu
Panjabi
Tamil
Oriya
? C POSIX
DSpeech Samples English (American)
English (British)
Dutch
French
German
Italian
Japanese
Korean
Portuguese
Russian
Spanish
Several ? Windows
eSpeak Samples English
...
Several C++ Linux
Windows
Mac OS X
RISC OS
Festival Speech Synthesis System Yes English
...
Several C++ Linux
Windows
FreeTTS ? English
...
Several Java Cross-platform
IVONA TTS Yes English
Polish
Romanian
5 C/C++ Cross-platform
Japplis Speech Yes English 1 Java Cross-platform
Kurzweil 1000 and Kurzweil 3000 ? ? ? ? ?
Nuance Vocalizer ? English (American)
English (British)
English (Australian)
Portuguese (Brazilian)
French (Canadian)
German
Spanish (Latin American)
10+ C/C++ ?
NuSuara Malay TTS Yes Bahasa Malaysia ? ? ?
Praat ? ? ? C Windows
Linux
Macintosh
FreeBSD
Solaris
RealSpeak Yes Basque
Catalan
Cantonese
Czech
Danish
Dutch
English (American, Australian, British, Indian, Irish, Scottish and South African)
Finnish
French (Canadian and French)
German
Greek
Hindi
Italian
Japanese
Korean
Mandarin (Mainland and Taiwan)
Norwegian
Polish
Portuguese (Brazilian and Portuguese)
Russian
Spanish (Castilian and American)
Swedish
Thai
Turkish
50+ C/C++ Windows
Linux
Embedded platforms
SoftVoice TTS Samples English
Spanish
20+ ? Windows
Linux
Embedded platforms
Software Automatic Mouth Samples ? ? ? Some Apple computers
(including the Apple II, and the Lisa)
Some Atari models
Commodore 64
Vocoder Samples ? ? ? ?
Online demo Available language(s) Available voices(s) Programming language Operating system(s)
Personal tools

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