Qdrant

Qdrant is an open-source vector search engine built for similarity search with payload filtering. It is developed by Qdrant and licensed under Apache-2.0, an open-source licence. According to the company's own account, the project began in 2021 when Andre Zayarni and Andrey Vasnetsov worked on leveraging vector similarity. It can be run self-managed on a buyer's own infrastructure, or consumed through Qdrant Cloud, with Hybrid Cloud and Private Cloud options also offered. The latest release is v1.19.1, published on 4 September 2026. Cloud pricing includes a free tier consisting of a single node with 0.5 vCPU, 1 GB of RAM and 4 GB of disk. The Standard plan is charged on usage by the hour, and the Premium plan carries a minimum spend. The open-source engine itself is free to self-host, so cost depends on the infrastructure used or the cloud plan chosen. Qdrant suits teams that need vector search with filtering on stored attributes and want a choice between running it themselves and paying for a managed deployment. The project shows as active, with a release in September 2026.