Best Open Source Backend Development Tools in 2026

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Open Source Alternatives

codebase-memory-mcp

stars 28.7Kforks 2.1K

Efficient code intelligence for AI coding agents

AI Coding Assistant Developer Tools Knowledge Management+1

Payload CMS

stars 43Kforks 3.8K

Build code-first CMS backends with TypeScript schemas

Self Hosted CMS API Development Tools+2

DeepSeek TUI

stars 38Kforks 3.3K

A coding agent that lives in your terminal.

CLI AI Coding Assistant Developer Tools+2

Flue Framework

stars 4.9Kforks 262

Build powerful, autonomous agents with TypeScript.

AI Agents Chatbots Developer Tools+2

Neovim

stars 99.6Kforks 6.9K

Hyperextensible Vim-based editor with Lua plugin support

Code Editors Coding Developer Tools+4

Zoneless

stars 306forks 28

Open source payout platform for global marketplace payments

Payment Infrastructure Invoicing & Payments E-commerce+4

InsForge

stars 11.7Kforks 1K

Backend-as-a-service platform built for AI coding agents

BaaS AI Agents API Infrastructure+4

Modelence

stars 407forks 37

Full-stack framework for building production-ready web apps

Developer Framework Authentication Database+4

Supabase

stars 104Kforks 12.7K

Open source Firebase: Postgres database, auth, and file storage

BaaS Database Authentication+5

CodeEdit

stars 22.9Kforks 1.2K

Native Swift code editor for macOS with no Electron overhead

Code Editors Developer Tools Coding+2

FerretDB

stars 11Kforks 480

Run MongoDB apps on PostgreSQL with no code changes needed

Database Self Hosted Developer Tools+2

Turso

stars 19.2Kforks 1K

Edge SQLite database with multi-tenancy for serverless apps

Database Cloud Native Developer Tools+3

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