Rideshare and delivery company Sidecar announced on Tuesday that it would be shuttering its services at 2pm Pacific Time, December 31, 2015.

Sidecar was one of the pioneering rideshare services, along with Lyft and Uber, but the two latter companies have succeeded in securing extraordinary amounts of funding, whereas Sidecar hasn't had quite so many dazzling headlines. Sidecar helped drivers connect with individual passengers, organized carpools, and made deliveries. In May, Re/code reported, Sidecar began delivering medical marijuana to San Francisco residents if they had a doctor’s note.

Sidecar CEO Sunil Paul wrote on Medium today that the company is not dissolving completely but instead ending its primary services in order to "work on strategic alternatives and lay the groundwork for the next big thing.” A spokesperson for Sidecar told Ars the company would not elaborate on what the next big thing is, exactly.

In his Medium post, Paul wrote, "shutting down the Sidecar service is a disappointment for our team and our fans. The impact of our work, however, will be felt for generations to come.” He added, "We changed transportation law, and created a new mode of transportation that has transformed cities and made life easier and better for millions of people."

Sidecar, like Uber and Lyft, struggled in its early days with local and state regulators who accused the companies of being mere taxi services that were skirting authority by virtue of doing business through an app. Paul resisted “overzealous regulators” like the California Public Utilities Commissioner (CPUC) and the California District Attorney’s office in their attempts to crack down on ridesharing services.

Ultimately, though, Re/code suggests it was a lack of funding that did Sidecar in. Writer Mark Bergen noted, "I’d heard that Sidecar was poking around for a sale recently, but did not hear who the prospective buyers were.” Unfortunately, it seems that no suitable offers surfaced.

A Sidecar spokesperson told Ars that it "alerted our riders, drivers, partners, and regulators via e-mail at 10 am this morning.”