Salesforce.com is the famous American cloud computing company founded in 1999 and headquartered in San Francisco, California.
The font used for the Salesforce logo is quite similar to Aller Regular/Italic. Aller Regular is a sans serif font family that has been designed by Dalton Maag. The font family includes three roman styles, ranging from light to bold, with matching italics. This font has the displayed weight, giving a wide range of tones of voice to choose from. If you want to download all of them for free, click here.
The Standard Edition of the Aller Font Family is available for free up to 25 users within your household or organization. If you need a license for more than 25 Users for the Standard Edition or would like licenses for the Typographic Edition, they can be bought online from Dalton Maag.