June 29, 2026
Postgres in a fake mustache?
DocumentDB – a MongoDB compatible open-source database
Microsoft drops a new database and the internet instantly starts side-eyeing the name
TLDR: DocumentDB is a new open-source database from Microsoft that aims to feel like MongoDB while running on PostgreSQL underneath. Commenters were less obsessed with the feature list than with the shock of Microsoft making it, the confusing Amazon-style name, and the awkwardly empty discussion link.
A new open-source database called DocumentDB has arrived promising a familiar MongoDB-style experience, but with PostgreSQL doing the heavy lifting underneath. On paper, it sounds like a practical pitch for app builders: easy document storage, search tools, Docker setup, Kubernetes support, and an MIT license that means people can use and modify it freely. But in the court of public opinion, the launch wasn’t just about features — it was about trust, branding, and pure comment-section chaos.
The biggest eyebrow-raise? Microsoft is behind it, and commenters were openly stunned. One reaction basically summed up the mood: wait, Microsoft built a MongoDB-like tool on top of PostgreSQL and it’s in the Linux Foundation too? For some readers, that was less “cool new tool” and more “what timeline are we living in?” Others immediately went hunting for ecosystem drama, asking how this connects to earlier projects like FerretDB and whether anything got quietly abandoned along the way.
Then came the naming outrage. More than one person groaned that “DocumentDB” already means Amazon DocumentDB to a lot of people, turning the launch into an accidental brand-recognition brawl. And the funniest jab of all? A commenter noticed the project homepage linked to a Hacker News discussion that was basically empty, which made the whole thing feel like a party where the host set out chairs before the guests arrived. In short: neat product, but the comments turned it into a live reaction special.
Key Points
- •DocumentDB is presented as an open-source, MIT-licensed document database that is fully compatible with MongoDB and built on PostgreSQL.
- •The article highlights native BSON support, PostgreSQL compatibility for advanced SQL, and support for CRUD, vector search, and multiple index types.
- •Supported index types include single-field, multi-key, compound, text, and geospatial indexes, including nested fields.
- •A Docker-based quick start is provided for running DocumentDB Local on port 10260 with username and password configuration.
- •The DocumentDB Kubernetes Operator is in preview and is intended to support deployments from local Kubernetes setups to hybrid and multi-cloud environments.