Security-as-a-service provider Proofpoint has entered into a definitive agreement to acquire Nexgate, a company that uses a cloud-based architecture for social media risk management. The transaction is valued at $35 million. As part of the acquisition, Nexgate’s team of security experts, software engineers and sales personnel will be joining Proofpoint’s team in its Sunnyvale headquarters.

Teradata has inked a partnership with Ayasdi, a company that provides accelerated learning software for complex data. Under the terms of the agreement, Ayasdi’s advanced analytics application will be integrated with the Teradata Unified Data Architecture. Ayasdi’s technology combines topological data analysis with machine learning algorithms.

Citrix has completed its acquisition of RightSignature, a cloud-based electronic signature company located in Santa Barbara, Calif. RightSignature, which integrates with Citrix ShareFile, provides a solution to get documents signed electronically. The RightSignature team will join Citrix. Terms of the acquisition were not disclosed.