Oracle and Salesforce.com have signed a nine-year partnership for all three tiers of cloud computing including Applications, Platform and Infrastructure.

As part of the deal, Salesforce plans to standardise on the Oracle Linux operating system, Exadata engineered systems, the Oracle Database, and Java Middleware Platform, while Oracle plans to integrate salesforce.com with Oracle’s Fusion HCM and Financial Cloud, and provide the core technology to power salesforce.com’s applications and platform.

Signalling an end to their rivalry between the two companies Oracle CEO Larry Ellison said: "We are looking forward to working with salesforce.com to integrate our cloud with theirs.

"When customers choose cloud applications they expect rapid low-cost implementations; they also expect application integrations to work right out of the box – even when the applications are from different vendors."

Salesforce.com CEO Marc Benioff said: "Larry and I both agree that salesforce.com and Oracle need to integrate our clouds."

Benioff, a former Oracle executive, left the software company to set up Salesforce in 1999.

"Salesforce.com’s CRM integrated with Oracle’s Fusion HCM and Financial Cloud is the best of both worlds: the simplicity of salesforce.com combined with the power of Oracle," said Benioff.

Ellison added: "Oracle will continue to sell Oracle applications and Salesforce will continue to sell Salesforce applications, and the integrations will be available from either company."

Salesforce.com executive VP Parker Harris said: "Deploying Exadata engineered systems throughout our data centres will allow us to significantly lower overall hardware, floor space and energy costs, while simultaneously providing our customers with higher performance and better reliability."