Data Protection Commissioner Helen Dixon has opened two new probes into Google and dating app Tinder's owner Match Group.
The latest Google investigation relates to concerns the company's processing of user location data and transparency around the process could violate EU privacy rules. The probe was launched following complaints from various consumer organisations across the EU, Ms Dixon's office said.
The separate investigation into Match Group is into "ongoing processing of users' personal data" gathered on Tinder and regarding the company's response to subjects' data rights requests.
The Commission has more than 20 ongoing investigations running into possible privacy breaches by big tech firms including Facebook, Twitter and Apple.
The two most advanced cases concern WhatsApp's transparency around data sharing with its owner Facebook and a probe into Twitter.