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Sidecar is a business-to-business delivery company.
Sidecar offers three services - a car sharing app, shared rides, a discounted instant carpooling app; and Sidecar Deliveries.
Sidecar Deliveries is available in eight U.S. markets. Founded in 2012 and based in San Francisco, Sidecar is backed by a number of large investors including Union Square Ventures, Avalon Ventures, Lightspeed Venture Partners, Google Ventures and Sir Richard Branson.
The company rapidly expanded its operations into Seattle, Los Angeles, Philadelphia and Austin. During South By Southwest in 2013, Sidecar made all rides during the conference free, paying its drivers as brand ambassadors during the event. In 2013 it also began serving Boston, New York City, Washington, D.C., Charlotte, Chicago, San Diego, Long Beach and Oakland as well.
In September 2014, Sidecar received $15 million in funding from current investors and new investor Sir Richard Branson.
Following an investment round from USV in August 2013, Sidecar pivoted to a new marketplace model in February of 2014. Whereas competitors rely on surge pricing to regulate supply, Sidecar drivers now set their own prices, while riders select the ride they want based on price, car ETA, and type/size of vehicle.
Legal challenges and approval in California
In the fall of 2012, the California Public Utilities Commission issued a cease and desist letter to Sidecar (along with rideshare companies Lyft and Uber) and fined each $20,000. However, in 2013 an interim agreement was reached reversing those actions. In September 2013, the CPUC unanimously voted to make the agreement permanent, creating a new category of service called "Transportation Network Companies" to cover Lyft, UberX, and Sidecar, and making California the first state to recognize such services.
In 2013 the Philadelphia Parking Authority carried out a sting operation against Sidecar, and shut it down as an "unauthorized service provider." However, Sidecar has argued that its operation is not taxi service but "a way to organize ridesharing and carpooling."
In February 2015, Sidecar announced a same-day service for local businesses that will deliver goods, food, and flowers to local consumers using its existing pool of drivers. Sidecar also announced its partnership with Yelp Eat24. 
Since the launch in February 2015, Sidecar has expanded to eight markets including San Francisco & the Bay Area, Seattle, Los Angeles, San Diego, Chicago, Boston, Washington DC and Brooklyn.
In August 2015, Sidecar pivoted to a mostly delivery-first company. 
- "Sidecar Connects Drivers and Passengers One Ride at a Time". Yahoo Finance. Retrieved 2012-06-26.
- Ridesharing Service Sidecar Expands to Boston, Brooklyn and Chicago - Liz Gannes - News - AllThingsD
- Geron, Tomio. "Sidecar Raises $10 Million From Google Ventures, Lightspeed - Forbes". Forbes.
- Lawler, Ryan (31 Jan 2013). "A Day After Cutting A Deal With Lyft, California Regulator Reaches An Agreement With Uber As Well". TechCrunch. Retrieved 17 July 2013.
- Geron, Tomio (9 Sep 2013). "California Becomes First State To Regulate Ridesharing Services Lyft, Sidecar, UberX". Forbes. Retrieved 23 Oct 2013.
- Sidecar Says Three Philadelphia Drivers Caught In ‘Sting,’ But It Plans To Continue Operations | TechCrunch
- Inside the Philadelphia Parking Authority's feud with Sidecar — NewsWorks