Concur made a $5 million "strategic investment" in airfare and room-rate tracker Yapta

, supporting TripIt Pro's refunds service. Under an alliance agreement, Concur will "exclusively" use Yapta's airfare price-tracking and price-protection services for TripIt Pro users, according to a statement. The fee-based TripIt Pro also offers flight alerts, loyalty program tracking, alternative flight search, sharing and other features. "Many travelers aren't even aware that that they could be eligible for a refund on their flight if the fare drops," noted Concur president and COO Rajeev Singh. Concur and Yapta said they would look for "additional opportunities for integrating.