Best Open Source Alternatives to MongoDB Atlas

Compare the best free and open-source alternatives to MongoDB Atlas — self-hosted and desktop replacements you fully control, ranked by GitHub stars, license and platform support.

Curated by open-source.store · Updated November 2026 · 1 alternatives

MongoDB Atlas

Proprietary SaaS

PricingFreemium

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MongoDB Atlas alternatives compared

Open-source alternatives to MongoDB Atlas, compared by stars, license and platform
Tool		License	Platforms	Self-hosted
FerretDB	11,112	Apache-2.0	LinuxDocker	Yes	Jun 2026	Visit

Top open-source MongoDB Atlas alternatives

FerretDB11,112Apache-2.0

FerretDB is an open-source proxy that runs MongoDB workloads on PostgreSQL, eliminating dedicated document database bills without changing client drivers.

LinuxDocker

vs MongoDB Atlas: a free, open-source option you fully control, licensed Apache-2.0.

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Best Open Source Alternatives to MongoDB Atlas

MongoDB Atlas

MongoDB Atlas alternatives compared

Top open-source MongoDB Atlas alternatives

The modern standard for Protobuf workflows

Mentoring for backend developers. Consulting for startups.