So we are not 100% sure what SERPmetrics is exactly about, but while we wait here for the Blueglass LA show to start, we stumbled on their site.
So far we only know that SERPMetrics allows large scale ranking tracking with a full-blown API. Apparently the tool is already in beta with 1 billion URLs tracked.
If these numbers are reality we definitely will have a larger player entering the market of SERP tracking. So far, the only company that does large scale SERP tracking for clients is Authoritylabs, so sounds exciting to see a new player entering the market.