A weekly roundup of must-read L.A. tech investments and acquisitions.

Signal Sciences

$9.7 million

Type: Equity

Location: Venice

Investors: Index Ventures

Description: Signal Sciences makes a web-application firewall. The firewall adjusts cyber-protection based on which applications are being attacked, in an effort to block attacks without interrupting production traffic. The company said its product allows software developers to make adjustments to cloud-based software without compromising security. The company’s clients include Under Armour, Etsy, Yelp/Eat 24, Shutterstock and Prezi.

Crexi

$4.3 million

Type: Equity

Location: Venice

Investors: Lerer Hippeau Ventures, Freestyle Capital, TenOneTen Ventures, Founder Collective, Karlin Ventures, Leon Capital Group and undisclosed angels

Description: Crexi is a real estate exchange platform. The platform allows brokers and real estate owners to find properties, manage acquisitions, review investment details and submit offers. The company’s cloud-based platform was also launched this week.

CrashPad Inc.

$2.5 Million

Type: Equity

Location: Venice

Investors: Led by Accomplice and CrossCut Ventures with participation from Paul Bricault and Elliott Bisnow

Description: CrashPad Inc.’s Overnight is a travel-booking app that connects last-minute travelers with local hosts. The app lets travelers pinpoint a neighborhood, set a radius, and then reach out to hosts in that geographic area. The app is aimed at spontaneous travelers and hosts, especially millennials, who do not want to be tied to a calendar and aren’t interested in dealing with planning trips ahead of time.

Technology reporter Garrett Reim can be reached at [email protected]. Follow him on Twitter @garrettreim for the latest in L.A. tech news.