Today EchoSign, a company that provides technology for electronic signatures, announced that it has been acquired by Adobe. EchoSign provides end-to-end solutions for handling the electronic signing of digital documents. According to the announcement: "The EchoSign solution will be integrated with Adobe's other document services including SendNow for managed file transfer, FormsCentral for form creation and CreatePDF for online PDF creation."

Although Adobe has been building a stack of software for creating Web content, it hasn't lost its focus on documents. PDF is a core part of Adobe. Last year Adobe acquired enterprise content management vendor Day Software. Adobe has integrated the Day technology into its expanded Digital Enterprise Platform (formerly known as LiveCycle) product. The company has also been branching out into various document-centric Web services like the ones mentioned above. Adding digital signatures the mix makes a lot of sense.

EchoSign also offers integrations via popular enterprise and SMB app stores such as Salesforce AppExchange, Netsuite SuiteCloud and Google Apps Marketplace. These are an emerging form of software distribution and are increasingly being adopted by traditional enterprise vendors (for example, SAP began offering its StreamWork application via Google Apps earlier this year).

EchoSign launched in 2006. It received series A funding from Storm Ventures and series B funding lead by Emergence Capital. Terms of the sale to Adobe were not disclosed.