# 8 Best Open Source Alternatives for MongoDB

Canonical: https://caniforkit.com/mongodb
Last updated: 2026-11-07

Looking for the best open source alternative for MongoDB? Compare 8 verified free and open source alternatives to MongoDB (TiDB, Turso, Convex) with license details, self-hosting requirements, and practical trade-offs.

## MongoDB Overview & Subscription Cost
- **Product**: MongoDB
- **Category**: [databases](https://caniforkit.com/category/databases)
- **Paid Subscription Price**: $25/month per seat
- **1-Seat Annualized Cost**: $300/year
- **5-Person Team Annualized Cost**: $1,500/year
- **10-Person Team Annualized Cost**: $3,000/year
- **Can I Vibe-Code / Rebuild It Myself?**: NO (use a free alternative, save the tokens)
- **Rebuild Verdict**: Instead of paying recurring SaaS fees for MongoDB or rebuilding it from scratch, deploy one of the 8 battle-tested open-source alternatives like TiDB.

## Verified Free & Open Source Alternatives

| Alternative | Type | License | Runs On | GitHub Stars | Head-to-Head |
| --- | --- | --- | --- | --- | --- |
| [TiDB](https://caniforkit.com/fork/tidb) | Open Source | Open Source | Local | ★ 40.7k | [Compare vs MongoDB](https://caniforkit.com/vs/mongodb-vs-tidb) |
| [Turso](https://caniforkit.com/fork/turso) | Open Source | Open Source | Local | ★ 17.3k | [Compare vs MongoDB](https://caniforkit.com/vs/mongodb-vs-turso) |
| [Convex](https://caniforkit.com/fork/convex) | Open Source | Open Source | Self-host | ★ 12.8k | [Compare vs MongoDB](https://caniforkit.com/vs/mongodb-vs-convex) |
| [Instant](https://caniforkit.com/fork/instant) | Open Source | Open Source | Local | ★ 10.6k | [Compare vs MongoDB](https://caniforkit.com/vs/mongodb-vs-instant) |
| [OceanBase](https://caniforkit.com/fork/oceanbase) | Open Source | Open Source | Local | ★ 10.4k | [Compare vs MongoDB](https://caniforkit.com/vs/mongodb-vs-oceanbase) |
| [Activeloop](https://caniforkit.com/fork/activeloop) | Open Source | Open Source | Local | ★ 9.3k | [Compare vs MongoDB](https://caniforkit.com/vs/mongodb-vs-activeloop) |
| [Memgraph](https://caniforkit.com/fork/memgraph) | Open Source | Open Source | Self-host | ★ 4.7k | [Compare vs MongoDB](https://caniforkit.com/vs/mongodb-vs-memgraph) |
| [SlateDB](https://caniforkit.com/fork/slatedb) | Open Source | Open Source | Local | ★ 3.6k | [Compare vs MongoDB](https://caniforkit.com/vs/mongodb-vs-slatedb) |

## In-Depth Alternative Profiles

### TiDB
- **Fork Page**: [TiDB Profile](https://caniforkit.com/fork/tidb)
- **Head-to-Head Comparison**: [MongoDB vs TiDB](https://caniforkit.com/vs/mongodb-vs-tidb)
- **Official Website**: https://tidb.cloud/
- **Source Code Repository**: https://github.com/pingcap/tidb
- **License**: Open Source
- **Runs On**: Local
- **GitHub Stars**: 40.7k
- **Maintenance Activity**: nov 2026
- **Supported Platforms**: desktop, cross-platform, one-click install
- **Summary**: Distributed SQL database combining OLTP and OLAP capabilities, offering horizontal scalability, high availability, and real-time analytics.
- **The Catch vs MongoDB**: Community-driven open source project without dedicated enterprise SLAs.
- **Installation**: Clone https://github.com/pingcap/tidb or deploy with Docker Compose
- **Setup**: Download the native package or installer for your operating system.
- **Data Storage**: All application data lives locally on your own machine.

### Turso
- **Fork Page**: [Turso Profile](https://caniforkit.com/fork/turso)
- **Head-to-Head Comparison**: [MongoDB vs Turso](https://caniforkit.com/vs/mongodb-vs-turso)
- **Official Website**: https://turso.tech
- **Source Code Repository**: https://github.com/tursodatabase/libsql
- **License**: Open Source
- **Runs On**: Local
- **GitHub Stars**: 17.3k
- **Maintenance Activity**: nov 2026
- **Supported Platforms**: desktop, cross-platform, one-click install
- **Summary**: Turso provides a simple developer experience with SQLite compatibility, allowing you to build and scale multi-tenant applications with unlimited databases.
- **The Catch vs MongoDB**: Community-driven open source project without dedicated enterprise SLAs.
- **Installation**: Clone https://github.com/tursodatabase/libsql or deploy with Docker Compose
- **Setup**: Download the native package or installer for your operating system.
- **Data Storage**: All application data lives locally on your own machine.

### Convex
- **Fork Page**: [Convex Profile](https://caniforkit.com/fork/convex)
- **Head-to-Head Comparison**: [MongoDB vs Convex](https://caniforkit.com/vs/mongodb-vs-convex)
- **Official Website**: https://convex.dev
- **Source Code Repository**: https://github.com/get-convex/convex-backend
- **License**: Open Source
- **Runs On**: Self-host
- **GitHub Stars**: 12.8k
- **Maintenance Activity**: nov 2026
- **Supported Platforms**: web, self-hosted, docker to self-host
- **Summary**: Open-source reactive database that keeps your web and mobile apps in sync. Write everything in TypeScript with built-in auth, cron jobs, and AI integration.
- **The Catch vs MongoDB**: Requires self-hosting setup, updates, and server maintenance compared to managed MongoDB.
- **Installation**: Clone https://github.com/get-convex/convex-backend or deploy with Docker Compose
- **Setup**: Deploy via Docker or binary release from GitHub and configure environment variables.
- **Data Storage**: All application data and configuration live on your own server or local database.

### Instant
- **Fork Page**: [Instant Profile](https://caniforkit.com/fork/instant)
- **Head-to-Head Comparison**: [MongoDB vs Instant](https://caniforkit.com/vs/mongodb-vs-instant)
- **Official Website**: https://www.instantdb.com/
- **Source Code Repository**: https://github.com/instantdb/instant
- **License**: Open Source
- **Runs On**: Local
- **GitHub Stars**: 10.6k
- **Maintenance Activity**: nov 2026
- **Supported Platforms**: desktop, cross-platform, one-click install
- **Summary**: Instant is a database solution for building real-time and offline-enabled applications, simplifying the development of collaborative products.
- **The Catch vs MongoDB**: Community-driven open source project without dedicated enterprise SLAs.
- **Installation**: Clone https://github.com/instantdb/instant or deploy with Docker Compose
- **Setup**: Download the native package or installer for your operating system.
- **Data Storage**: All application data lives locally on your own machine.

### OceanBase
- **Fork Page**: [OceanBase Profile](https://caniforkit.com/fork/oceanbase)
- **Head-to-Head Comparison**: [MongoDB vs OceanBase](https://caniforkit.com/vs/mongodb-vs-oceanbase)
- **Official Website**: https://en.oceanbase.com/
- **Source Code Repository**: https://github.com/oceanbase/oceanbase
- **License**: Open Source
- **Runs On**: Local
- **GitHub Stars**: 10.4k
- **Maintenance Activity**: nov 2026
- **Supported Platforms**: desktop, cross-platform, one-click install
- **Summary**: Scalable, high-availability database system supporting OLTP, OLAP, and hybrid transactional/analytical processing workloads.
- **The Catch vs MongoDB**: Community-driven open source project without dedicated enterprise SLAs.
- **Installation**: Clone https://github.com/oceanbase/oceanbase or deploy with Docker Compose
- **Setup**: Download the native package or installer for your operating system.
- **Data Storage**: All application data lives locally on your own machine.

### Activeloop
- **Fork Page**: [Activeloop Profile](https://caniforkit.com/fork/activeloop)
- **Head-to-Head Comparison**: [MongoDB vs Activeloop](https://caniforkit.com/vs/mongodb-vs-activeloop)
- **Official Website**: https://www.activeloop.ai
- **Source Code Repository**: https://github.com/activeloopai/deeplake
- **License**: Open Source
- **Runs On**: Local
- **GitHub Stars**: 9.3k
- **Maintenance Activity**: nov 2026
- **Supported Platforms**: desktop, cross-platform, one-click install
- **Summary**: Deep Lake is an open-source database for storing, querying and managing complex AI data like images, audio, and embeddings.
- **The Catch vs MongoDB**: Community-driven open source project without dedicated enterprise SLAs.
- **Installation**: Clone https://github.com/activeloopai/deeplake or deploy with Docker Compose
- **Setup**: Download the native package or installer for your operating system.
- **Data Storage**: All application data lives locally on your own machine.

### Memgraph
- **Fork Page**: [Memgraph Profile](https://caniforkit.com/fork/memgraph)
- **Head-to-Head Comparison**: [MongoDB vs Memgraph](https://caniforkit.com/vs/mongodb-vs-memgraph)
- **Official Website**: https://memgraph.com
- **Source Code Repository**: https://github.com/memgraph/memgraph
- **License**: Open Source
- **Runs On**: Self-host
- **GitHub Stars**: 4.7k
- **Maintenance Activity**: nov 2026
- **Supported Platforms**: web, self-hosted, docker to self-host
- **Summary**: Memgraph is a scalable, in-memory graph database solution offering high-performance computing and Neo4j compatibility.
- **The Catch vs MongoDB**: Requires self-hosting setup, updates, and server maintenance compared to managed Neo4j AuraDB.
- **Installation**: Clone https://github.com/memgraph/memgraph or deploy with Docker Compose
- **Setup**: Deploy via Docker or binary release from GitHub and configure environment variables.
- **Data Storage**: All application data and configuration live on your own server or local database.

### SlateDB
- **Fork Page**: [SlateDB Profile](https://caniforkit.com/fork/slatedb)
- **Head-to-Head Comparison**: [MongoDB vs SlateDB](https://caniforkit.com/vs/mongodb-vs-slatedb)
- **Official Website**: https://slatedb.io
- **Source Code Repository**: https://github.com/slatedb/slatedb
- **License**: Open Source
- **Runs On**: Local
- **GitHub Stars**: 3.6k
- **Maintenance Activity**: nov 2026
- **Supported Platforms**: desktop, cross-platform, one-click install
- **Summary**: SlateDB is an embedded storage engine that leverages object storage for durability, scalability, and simplified replication without the need for disk management.
- **The Catch vs MongoDB**: Community-driven open source project without dedicated enterprise SLAs.
- **Installation**: Clone https://github.com/slatedb/slatedb or deploy with Docker Compose
- **Setup**: Download the native package or installer for your operating system.
- **Data Storage**: All application data lives locally on your own machine.

## Frequently Asked Questions

### What is the best free alternative to MongoDB?
The top free alternative to MongoDB is TiDB (open source, Open Source). Distributed SQL database combining OLTP and OLAP capabilities, offering horizontal scalability, high availability, and real-time analytics. Other popular MongoDB replacements include Turso, Convex, Instant.

### How much does switching from MongoDB to a free alternative save?
MongoDB starts at $25/month per seat ($300/year). Switching a 5-person team to a free alternative like TiDB saves $1,500 per year in software subscription fees.

### What is the catch when switching away from MongoDB?
While TiDB replaces core MongoDB features without subscription fees, the real-world trade-off is: Community-driven open source project without dedicated enterprise SLAs.

## Related

- [databases Software Category Hub](https://caniforkit.com/category/databases)
- [All Paid SaaS Alternatives Index](https://caniforkit.com/alternatives)
- [Self-Hosted Software Directory](https://caniforkit.com/self-hosted)
- [Homepage](https://caniforkit.com)