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Tegile Systems IntelliFlash is a brand of Western Digital DataDirect Networks (DDN) based in San Jose that manufactures flash storage arrays. Both hybrid and all-flash storage arrays use technology called IntelliFlash. The company, then known as Tegile Systems, was acquired by Western Digital in 2017 and by DDN in September 2019.

History
Tegile Systems was founded in 2010 by Rohit Kshetrapal, Rajesh Nair, Justin Cheen, and Alok Agrawal. In February 2012, Tegile came out of stealth mode when it announced a product line called Zebi. Tegile investors include August Capital, SanDisk, and Western Digital.

In 2013, a $32 million investment included led by Meritech Capital Partners, which included a corporate venture capital investment from SanDisk Ventures. In May, 2015, a round of $70 million was announced, with additional investors Capricorn Investment Group, Cross Creek Advisors and Pine River Capital Management.

By the end of 2015, Tegile had an estimated 360 employees. In 2017 Western Digital bought Tegile Systems. and then rebranded it as IntelliFlash. Western Digital pulled out of the storage systems business sold IntelliFlash to DDN in September 2019 and Tegile Systems was acquired by DDN.

Technology
Tegile developed what the company calls IntelliFlash Metadata Acceleration, which is a way to store metadata on high speed solid state disks, apart from the underlying data. Tegile hybrid and all-flash storage arrays use an implementation of the ZFS file system. Tegile made some changes to the way data is written to the file system, specifically how metadata is handled. IntelliFlash supports both block and file access, including iSCSI, Fibre Channel (FC), Network File System (NFS), and Server Message Block (SMB) protocols. Tegile arrays support inline data deduplication and data compression. Some competitors are noted as Nimble Storage and Tintri.