Persistence Software

Persistence Software
Company type	Public (NASDAQ: PRSW)
Industry	Software
Predecessor	Lighthouse Design
Founded	1991; 35 years ago in San Mateo, California, United States
Founder	Derek Henninger, Christopher Keene, Richard Jensen
Defunct	2004
Fate	Acquired by Progress Software
Headquarters	San Mateo, United States
Products	PowerTier, EdgExtend, DirectAlert
Parent	Progress Software (from 2004)

Persistence Software was a U.S.-based software firm that operated between 1991 and 2004. Headquartered in San Mateo, California, it was founded by Derek Henninger, Christopher Keene, and Richard Jensen. The company focused on developing software solutions for object-relational mapping. In 1999, Persistence Software became a publicly traded company on the NASDAQ stock exchange under the symbol PRSW and was subsequently purchased by Progress Software in 2004.

History

Founded in 1991 as a spinoff from Lighthouse Design in San Mateo, California, Persistence Software originated from engineers at Lighthouse who had created Exploder—a tool designed to store objects within relational databases on the NeXTSTEP operating system.

With guidance from Stanford University professors Gio Wiederhold and Arthur M Keller (who served as chief technical advisor), Persistence enhanced object-relational mapping by integrating concepts related to associated object mapping.

The firm produced several products combining object-to-relational mapping with caching and automated cache management capabilities, which were marketed under the names PowerTier, EdgExtend, and DirectAlert.

In 1998, Sun Microsystems obtained a license for Persistence’s technology, which was later incorporated into the Enterprise JavaBeans specification.

Ultimately, in 2004, Progress Software acquired Persistence Software for $16 million.

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