Eight years into our goal to transform one of the largest, most antiquated industries in the U.S., we are still scratching the surface of our opportunity ahead. The existing process of buying and selling a home is viewed as one of the worst experiences in life. Additionally, the traditional solutions can take 100-plus days, involve multiple counterparties, and require dozens of offline steps, on top of customer contact information being sold to the highest bidder at multiple steps. Finally, the opportunity ahead will be fueled by a new wave of digital-first home buyers and home sellers.
It is our fundamental belief that in a matter of years, millions of home buyers and home sellers will choose a simple, certain and fast experience and transact themselves, completely online. Our 2021 results reflect that this shift is underway. We experienced a nearly seven-fold increase in offer requests from home sellers versus the prior year, we saw all our home sellers engage with our digital dashboard to plan their move, and we provided all our customers an online sale. For buyers, we saw increased demand for a digital touring experience with our self-tour product seeing nearly four times more volume than the prior year and our purchase offers growing five times over the same period - powered by our Opendoor-Backed Offers program.
In terms of our financial performance, we demonstrated our market leadership and delivered exceptional results:
We consistently outperformed our expectations in our first year as a public company and pulled forward our financial targets by years, exiting 2021 at a revenue run-rate of over $15 billion.
Our experience took another leap forward with the launch of major product experiences and substantial improvements in pricing and operations. We introduced Opendoor-Backed Offers, which provides buyers with the benefits of an all-cash offer, we launched self-service virtual assessments making inspections faster and more convenient, and we launched Opendoor Complete, which brings together all of our products and services into a single, streamlined experience.
Furthermore, we invested in our entrepreneurial talent and capabilities, acquiring teams from Pro.com, Skylight.com, and RedDoor, which will power our home personalization and digital mortgage efforts. In pricing, we were able to simultaneously reduce our pricing uncertainty, while increasing our buybox by 50% year-over-year, enabling us to provide offers on more than 60% of all transactions in our active markets. Operationally, our investments in technology drove significant efficiencies, resulting in our ability to deliver nearly six times the home assessments and repairs and nearly 110 basis points of operational cost structure improvements over last year. These investments have also allowed us to efficiently scale the number of customers we service by over 250% from the prior year and efficiently expand our market footprint, doubling the number of our markets in 2021.
Looking forward, there are a multitude of reasons why 2022 will define Opendoor. We will drive innovations in our consumer experience, with investments in Opendoor Complete and in our digital one-stop-shop with a suite of services. We will build on our industry-leading pricing capabilities to be the most trusted company to provide a competitive, online offer. We will double our audience and consumer base by expanding to more markets, increasing our buybox, and driving national brand awareness. We will continue to invest in our technology and operations platforms to drive additional scale and cost efficiencies. We will aim to deliver another year of exceptional results rooted in rapid growth and strong unit economics. Last, and most importantly, we will build a world-class consumer experience that removes the stress of moving and continues to transform the industry.
Source: Opendoor Q4 2021 Shareholder Letter