EX-99

                     Exhibit 99.1 - Explanation of Responses

     (1) The reported transactions involving Warrants to buy Common Stock, par
value $0.001 per share, of Nuance Communications, Inc. (formerly ScanSoft, Inc.)
(the "Company"), relate to an amendment to extend the expiration date of
Warrants originally issued April 8, 2004 (the "April 8 Warrants") pursuant to a
Warrant Amendment Agreement, dated January 13, 2009 (the "Warrant Amendment
Agreement"), by and among the Company, Warburg Pincus Private Equity VIII, L.P.,
a Delaware limited partnership ("WP VIII") and two affiliated partnerships of WP
VIII. In accordance with the Warrant Amendment Agreement, the expiration date of
the April 8 Warrants has been extended to the date (the "April 8 Warrant
Expiration Date") that is one day following the fifth (5th) business day after
the six (6) month anniversary of the Closing Date (as defined in that certain
Purchase Agreement, dated January 13, 2009 (the "2009 Purchase Agreement"), by
and among the Company, Warburg Pincus Private Equity X, L.P. and Warburg Pincus
X Partners, L.P.; provided, however, that if the 2009 Purchase Agreement is
terminated pursuant to its terms, the April 8 Warrant Expiration Date shall be
the date that is one day following the fifth (5th) business day after the later
of (a) March 2, 2009, or (b) the date of termination of the 2009 Purchase
Agreement. The April 8 Warrants are immediately exercisable.

     (2) All of the securities disclosed in this Form 4 are owned by WP VIII and
two affiliated partnerships. Warburg Pincus Partners, LLC, a New York limited
liability company ("WPP LLC"), which is a subsidiary of Warburg Pincus & Co., a
New York general partnership ("WP"), is the sole general partner of WP VIII.
Warburg Pincus LLC, a New York limited liability company ("WP LLC," and together
with WP VIII, WPP LLC and WP, the "Warburg Pincus Entities"), manages WP VIII.
By reason of the provisions of Rule 16a-1 of the Securities Exchange Act of
1934, as amended (the "Exchange Act"), WP, WPP LLC and WP LLC may be deemed to
be the beneficial owners of an indeterminate portion of the securities
beneficially owned by WP VIII. WP, WPP LLC and WP LLC each disclaim beneficial
ownership of all such securities, except to the extent of any indirect pecuniary
interest therein. WP VIII has the contractual right to designate up to two
directors to the Board of Directors of the Company. William H. Janeway and
Jeffrey A. Harris, became directors of the Company on April 8, 2004 and
September 15, 2005, respectively. Mr. Janeway and Mr. Harris are the WP VIII
designees to the Board of Directors of the Company. Mr. Janeway is a General
Partner of WP and a Member and Senior Advisor of WP LLC. Mr. Harris is a General
Partner of WP and a Member and a Managing Director of WP LLC. As such, Mr.
Janeway and Mr. Harris may be deemed to have an indirect pecuniary interest
(within the meaning of Rule 16a-1 under the Exchange Act) in an indeterminate
portion of the securities beneficially owned by the Warburg Pincus Entities. Mr.
Janeway and Mr. Harris disclaim beneficial ownership of all such securities,
except to the extent of any indirect pecuniary interest therein. Mr. Janeway and
Mr. Harris each also beneficially own 45,000 shares of restricted common stock
of the Company that were issued to them in their capacity as directors of the
Company. In addition, Mr. Janeway beneficially owns options to acquire 80,000
shares of common stock of the Company and Mr. Harris beneficially owns options
to acquire 50,000 shares of common stock of the Company, which options were
issued to them in their capacity as directors of the Company. Charles R. Kaye
and Joseph P. Landy are Managing General Partners of WP and Managing Members and
Co-Presidents of WP LLC and may be deemed to control the Warburg Pincus
Entities. Messrs. Kaye and Landy disclaim beneficial ownership of all shares
owned by WP VIII and Messrs. Janeway and Harris, except to the extent of any
indirect pecuniary interest therein.

     WP VIII, WPP LLC and WP are directors-by-deputization solely for purposes
of Section 16 of the Exchange Act.

     (3) The reported transactions involving Warrants to buy Common Stock, par
value $0.001 per share, of the Company, relate to an amendment to extend the
expiration date of Warrants originally issued May 9, 2005 (the "May 9 Warrants")
pursuant to the Warrant Amendment Agreement. In accordance with the Warrant
Amendment Agreement, the expiration date of the May 9 Warrants has been extended
to the date (the "May 9 Warrant Expiration Date") that is one day following the
fifth (5th) business day after the six (6) month anniversary of the Closing Date
(as defined in the 2009 Purchase Agreement); provided, however, that if the 2009
Purchase Agreement is terminated pursuant to its terms, the May 9 Warrant
Expiration Date shall be the date that is one day following the fifth (5th)
business day after the later of (a) May 9, 2009, or (b) the date of termination
of the 2009 Purchase Agreement.

EX-99

                     Exhibit 99.2 - Joint Filer Information

Designated Filer:  Warburg Pincus Private Equity VIII, L.P.
Issuer & Ticker Symbol:  Nuance Communications, Inc. (NUAN)
Date of Event Requiring Statement:  January 13, 2009

Joint Filers:

1.   Name:     Warburg Pincus & Co.
     Address:  466 Lexington Avenue
               New York, New York 10017

2.   Name:     Warburg Pincus LLC
     Address:  c/o Warburg Pincus & Co.
               466 Lexington Avenue
               New York, New York  10017

3.   Name:     Warburg Pincus Partners LLC
     Address:  c/o Warburg Pincus & Co.
               466 Lexington Avenue
               New York, New York  10017

4.   Name:     William H. Janeway
     Address:  c/o Warburg Pincus & Co.
               466 Lexington Avenue
               New York, New York  10017

5.   Name:     Jeffrey A. Harris
     Address:  c/o Warburg Pincus & Co.
               466 Lexington Avenue
               New York, New York  10017

EX-99

                     Exhibit 99.3 - Joint Filers' Signatures


WARBURG PINCUS & CO.


By: /s/ Scott A. Arenare                                 Date:  January 15, 2009
    ------------------------------                       -----------------------
    Name:   Scott A. Arenare
    Title:  Partner

WARBURG PINCUS LLC


By: /s/ Scott A. Arenare                                 Date:  January 15, 2009
    ------------------------------                       -----------------------
    Name:   Scott A. Arenare
    Title:  Member

WARBURG PINCUS PARTNERS LLC
 By:  Warburg Pincus & Co., its Managing Member


By: /s/ Scott A. Arenare                                 Date:  January 15, 2009
    ------------------------------                       -----------------------
    Name:   Scott A. Arenare
    Title:  Partner



By: /s/ Scott A. Arenare                                 Date:  January 15, 2009
    ------------------------------                       -----------------------
    Name:   William H. Janeway
    By:     Scott A. Arenare*



By: /s/ Jeffrey A. Harris                                Date:  January 15, 2009
    ------------------------------                       -----------------------
    Name:   Jeffrey A. Harris


* Power of Attorney given by Mr. Janeway was previously filed with the SEC on
May 22, 2008 as an exhibit to a Form 4 filed by Warburg Pincus Private Equity
VIII L.P. with respect to Nuance Communications, Inc.