Keynote Systems to Announce Fiscal 2009 Second Quarter Financial Results on April 28th

SAN MATEO, Calif.--(Business Wire)--
Keynote Systems (Nasdaq:KEYN), the global leader in on-demand mobile and
Internet test & measurement solutions for continuously improving the online
experience, intends to announce its fiscal 2009 second quarter financial results
for the period ended March 31, 2009 after the market closes on Tuesday, April
28, 2009. Keynote will host an earnings conference call at 2:00 P.M. Pacific
(5:00 P.M. Eastern).

To access the call in the U.S., please dial (866) 271-6228, and for
international callers dial (973) 638-3423 approximately 10 minutes prior to the
start of the conference call. The conference ID is #93909452. The conference
call will also be broadcast live over the Internet and available for replay for
90 days at www.keynote.com. In addition, a replay of the call will be available
via telephone for five business days, beginning two hours after the call. To
listen to the telephone replay in the U.S., please dial (800) 642-1687, and for
international callers, dial (706) 645-9291. Enter access code 93909452.

About Keynote

Keynote Systems (Nasdaq "KEYN") is the global leader in on-demand test &
measurement solutions for continuously improving the online experience. For over
a decade, Keynote has been providing measurement data and testing capabilities
that allow companies to understand and improve their customers` online and
mobile experience. Keynote has four test and measurement businesses: Web
performance, mobile quality, streaming & VoIP, and customer experience/UX.

Known as The Mobile and Internet Performance Authority, Keynote has a
market-leading infrastructure of 2,600 measurement computers and mobile devices
in over 240 locations around the world. Keynote`s 2,800 customers represent top
Internet and mobile companies including American Express, Dell, Disney, eBay,
E*TRADE, Expedia, Microsoft, SonyEricsson, Sprint, T-Mobile, Verizon, Vodafone
and YouTube.

Keynote Systems, Inc. is headquartered in San Mateo, California and can be
reached at www.keynote.com or by phone in the U.S. at 1-800-KEYNOTE.

Keynote Systems, Inc.
Public Relations
Dan Berkowitz, 650-403-3305
dberkowitz@keynote.com
Investor Relations
Kirsten Chapman, 415-433-3777
kchapman@lhai.com

Copyright Business Wire 2009