As you've seen from our press release, we are off to a very strong start in 2023. We reported first quarter revenue of $383 million, representing growth of 21% compared with last year, again, exceeding our own expectations. And has been in the case in the last few quarters, we continue to significantly outperform the digital advertising industry. We are gaining market share as advertisers embrace the precision and relevance of data-driven advertising on the open Internet via our platform.
Just a couple of days ago, we announced a new retail partnership with Macy's here in the United States. In Europe, we recently announced a new partnership with Ocado, a joint venture involving Marks & Spencer and one of U.K.'s fastest-growing grocery groups. We now work with many of the world's leading retailers to activate their data for our advertisers, and our clients are embracing the opportunity to apply more performance and measurement precision to their retail campaigns. In many cases, this is incremental market opportunity for us. It also means we continue to advance our industry leadership in AI, which I mentioned earlier, and which we will talk about more on June 6 with the launch of Kokai .
Last quarter, I said we expect 75% of the third-party data ecosystem to be activating on UID2 by the middle of the year. I'm proud to report today that we are now right at that level, with most major third-party data providers leveraging UID2s on our platform.