As developers LLC "YANDEKS" created company worth $2 billion

LLC "YANDEKS" developed 13 years system of managements databases with an open initial code, and then on the basis of these development ClickHouse, Inc created the separate company. together with venture funds Benchmark Capital and Index Ventures. What problems are solved by these startup and how it managed to attract investments by an assessment in $2 billion, and also to catch in clients of IT giant ByteDance and Cloudflare Closed joint stock company? .