empowers developers with an open-source, MongoDB-compatible database layer built on PostgreSQL, merging NoSQL flexibility with PostgreSQL reliability. We are committed to eliminating vendor lock-in and fostering a collaborative community to deliver transparent, adaptable document database solutions. Vision: To lead the future of document databases by championing open standards and collaborative innovation, empowering developers to build freely across vendor-agnostic ecosystems. We envision a world where seamless, interoperable data management is driven by community-led standardization, ensuring transparency, portability, and freedom from proprietary constraints.
2022 by two US-based investors) • FerretDB Inc. is based in Delaware, US • 8 team members working fully remotely (Hungary, Spain, Japan, Armenia, Canada, Poland, USA) • Fully Open Source product • Support, consulting, managed services • Custom feature development • Agreements with database as a service providers on revenue share
Postgres? • MongoDB’s licensing • History of SQL as an Open Standard • MongoDB Query Language as an Open Standard? • Architecture of FerretDB • Demo • Conclusion
(excerpt) “Which database environments have you done extensive development work in over the past year, and which do you want to work in over the next year? “ “Which database environments have you done extensive development work in over the past year, and which do you want to work in over the next year? “ 76k responses
Public Licence (SSPL). If MongoDB is used as part of a Cloud Service… … source code of everything you use to provide that service needs to be licensed under SSPL. Or you pay a licence fee. MongoDB’s approval (and license) is needed. This kills innovation and creates vendor lock-in. More info: www.ssplisbad.com Also: Peter Zaitsev and Matt Yonkovit’s articles on Percona Blog
SSPL license is vague - we are looking to replace MongoDB due to the legal risks and uncertainty.” - a FAANG company “We are looking to find a MongoDB Atlas alternative, without vendor lock-in.” - Major travel search portal “Pricing of MongoDB Atlas is not suitable for our use case.” - Small SaaS business “We are unable to offer our customers an open-source, MongoDB-compatible database.” - Cloud Infrastructure provider
of data for large shared data banks, Jun/1970 Author: Edgar F "Ted" Codd, IBM Research Labs Muthukkaruppan, K. (2023) “ Evolution of transactional databases,” Postgres Conf. SV. Postgres Conf. SV, San Jose: Hilton, 20 April 2023.
70s, Don Chamberlin and Ray Boyce laid down the foundations of the SQL query language for relational databases, which even non-developers could use. Advanced SQL — Chapter 01 (2020) Torsten Grust. YouTube. Available at: https://www.youtube.com/watch?v=HAI5DG_l60k (Accessed: April 22, 2023).
• SQL Becomes an ANSI and later ISO Open Standard called SQL86. • Anyone can implement them • Features can be added on top (standard extension) All vendors were proprietary, this still meant vendor lock-in.
early 2000s: Open Source projects started adopting SQL, partial implementations of the standard. SQL is available to be used by anyone. Since then: hundreds of derivatives
dozens of different ways! MQL MQL? MQL? MQL? All proprietary. Products look similar, but incompatible with each other. Once you choose one, you may be stuck with that. MQL?
at Document Databases! • MongoDB, a then open source database, develops MQL - the MongoDB Query Language. • “Don’t need to be a DBA to run a database” • Achieves market dominance in certain segments • Goes proprietary in 2018 • Attempts to redefine the meaning of open source - SSPL license
query language, but • vastly different feature set • different degree of compatibility • no chance of migration between them • all proprietary • Most tied to cloud vendors For a “MongoDB alternative” - MongoDB sets the pace.
based on MongoDB - A JSON query language - Can be extended at the expense of portability Overwhelming interest from vendors and developers in the industry. It will: - Ensure portability between products - Can be extended, just like SQL - Stimulates innovation, increase competition - Be very good for users
reason behind high adoption of MongoDB • Provides unmatched Developer Experience • Free to use under Apache 2.0 MongoDB Backend • Licensed under SSPL • Proprietary vendors (Amazon, IBM, Oracle, etc.) replaced it in their own implementations of a compatible product MongoDB Drivers MongoDB API WiredTiger Apache 2.0 SSPL FerretDB replaces the MongoDB Backend with PostgreSQL MongoDB Drivers FerretDB PostgreSQL, DocumentDB ext. Apache 2.0 PostgreSQL (OSI)
ON, could be more in reality) • 10k stars on GitHub, 200+ contributors • Enterprise users Support, consulting and managed services offered by FerretDB Inc.
FerretDB 2.0 + Microsoft DocumentDB (Postgres extension) • Together, an OSS Mongo alternative users can run anywhere • Same engine as Azure CosmosDB for MongoDB • Ties into push towards Open Standard
Suite - test to achieve a common feature set • Certify compatibility first, write standard later • Supported by many companies in the Postgres community www.opendocdb.org
for Document Databases • MongoDB will become a commodity, like SQL Best outcome for developers and the industry. • FerretDB leads the way opening up the Document Database market • We build FerretDB with the community
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