The successor company to defunct ride-hailing app Sidecar sued Uber Technologies Inc. on Tuesday alleging Uber used unfair tactics to drive competition off the road and is “now a monopolist.”

The suit filed by SC Innovations Inc. in the U.S. District Court for the Northern District of California claims Uber stole Sidecar’s business model and “intentionally sustained near-term losses that were designed to drive Sidecar out of the market while Uber acquired a dominant market position.”