Robert Lisy
Analyst · JMP Securities
Thanks, Sloan, and thank you to our investors and analysts joining us for our third quarter conference call.
Similar to last quarter, let's start with an update of our key strategic priorities and a review of our strong year-to-date performance.
As you can see on Slide 3, our priorities are largely unchanged, and we are pleased to say that we are on track. Our #1 priority remains the expansion and growth of our core brick-and-mortar business. The continued evolution of this core business presents the largest opportunity for overall growth.
Our focus is to continue to drive further penetration across our more established markets in the east and southeast and expand further into the very large markets in the western states. As we have mentioned previously, we see a long runway for growth, and we believe the pace of growth relative to the market continued to support our conviction in this multiyear opportunity.
Secondly, our new service to Africa as well as our Canadian outbound business continued to perform in line with our expectations. We'd also remind you that we do not expect any meaningful EBITDA contribution from either market in 2019, but the performance we have seen in both markets has been encouraging thus far. We have made good early progress in both markets, and we continue to -- and we will continue to update you as the business grows.
Our white label processing service is now live with 2 partners, and we are pleased with the progress we have seen within this service offering. Although the business can be a nice complement in the future, we would reiterate that we do not expect any meaningful contribution from this offering in 2019.
Lastly, I would like to take a moment to highlight 2 key hires we made in the quarter. First, in late September, we named Joseph Aguilar as our Chief Operating Officer. Joseph comes to us with 30 years of experience in banking and money service business industries. He brings a wealth of industry experience to help lead our continued rapid growth in existing markets and future expansion into new markets. Second, we announced in early October the appointment of Chris Lofgren to our Board of Directors. Chris recently served as the Chief Executive Officer and President and as a Director of Schneider National, Inc. from August 2002 until his retirement in April of 2019. Chris brings to our Board valuable knowledge and experience with insights as both a technology leader and a public company CEO. On behalf of the company, I would like to welcome both Joseph and Chris to the team.
Moving on, let's kick off the review of our third quarter results against our key performance indicators on Page 4. We are pleased to have sustained our momentum from the first half of 2019. Across the board, our performance versus the broader market remained strong as we continue to take share with our differentiated customer and agent-focused approach to the business.
First, Intermex had another great quarter on the top line as revenue grew nearly 18%, which again drove positive operating leverage as adjusted EBITDA grew by 22%. The growth was broad-based and driven in both our established and newer growth states, although we are seeing some mix shift to lower dollar revenue markets, which we'll speak to later in the discussion.
We continue to take market share across our core corridors. We have confidence in our strategy as remittance volumes continue to be strong. Specifically, Intermex remittance volume in our U.S. to Mexico corridor grew at 16.5%, while volumes to Guatemala grew approximately 21%. Lastly, we continue to make progress on our noncore growth initiatives, which I spoke about previously.
Turning to Slide 5. Let's review our growth over last year's third quarter. And again, we are very pleased with both our top line growth as well as the pull-through in profitability.
First, on the top half of the page, we grew transaction volumes by 19% and 21%, respectively, over last year. As with previous quarters, this was driven by our ability to be a value-added provider and ultimately build brand loyalty with our customers and agents. On the bottom left, strong volumes resulted in 17.7% revenue growth over last year. And lastly, the lower right, we are pleased by our adjusted EBITDA growth of 22.4%, which again showed some of the operating leverage in our model.
We're certainly pleased with the 75 basis point expansion in margins year-over-year. However, we remind you of the recent public comments stating that we expect margins to flatten out. This is driven by the mix shift towards lower-margin markets like California, where the volume opportunity is very large. As a reference point, our adjusted EBITDA margin of 19.3% in the third quarter is relatively consistent with our margin last quarter.
Again, we are very proud of our performance in third quarter and believe the industry is still fragmented and positioned for us to continue to take share.
With that, let me turn the call over to Tony to discuss our markets, a breakdown of the quarter and our financial outlook for the year.