If you need an embedded database for a commercial desktop app or on-prem appliance, you should look at SQLite, RocksDB, or LevelDB. Or, you need to buy a commercial license from MongoDB. Assuming you are in Scenario A (standard SaaS/web app) and are safe to use Community Edition, what are you missing versus the paid Enterprise edition? You need to know this before you scale.
MongoDB got tired of this. They created the Server Side Public License (SSPL) . The SSPL explicitly closes the cloud loophole. It states: If you offer MongoDB as a service to third parties, you must open source all the management software, APIs, and infrastructure code you use to host it.
It is a fair question. In the world of databases, "free" often comes with landmines. Some databases are free only for development. Others are free until you use clustering. Others are "open source" but restrict cloud usage.
| Feature | Community Edition | Enterprise Edition | | :--- | :--- | :--- | | | Yes | Yes | | Replication (Replica Sets) | Yes | Yes | | Sharding (Horizontal Scaling) | Yes | Yes | | Oplog | Yes | Yes | | In-Memory Storage Engine | No | Yes | | Encryption at Rest | No | Yes | | Field Level Redaction | No | Yes | | Auditing | No | Yes | | Kerberos/LDAP Auth | No (SCRAM only) | Yes | | Ops Manager (Backup/Deployment) | No (Community tooling is limited) | Yes |
The fear around the SSPL is mostly FUD (Fear, Uncertainty, and Doubt) spread by competitors or by engineers who read the first paragraph of the license and panicked. If you are writing code for a unique application—whether it is a fintech startup, a logistics platform, or a gaming leaderboard—you will never trigger the "service as a service" clause.
MongoDB used to be licensed under the GNU Affero General Public License (AGPLv3). The AGPL was strong: if you modified MongoDB itself and offered it as a service to the public, you had to release your source code. However, a loophole existed. Large cloud providers (AWS, IBM, etc.) could take vanilla MongoDB, wrap it in their own management layer, and sell "MongoDB as a Service" without contributing anything back to MongoDB, Inc.
Here is everything you need to know about using MongoDB Community Edition for your business. MongoDB Community Edition is free for commercial use.
Under the SSPL, if you distribute MongoDB as part of your commercial software, you must make the entire source code of your software available under the SSPL (or a compatible license). Unless you want to open source your $5,000/month backup tool, you cannot embed MongoDB Community Edition inside a commercial product you ship to customers.