01
Appsmith
Build custom apps 80% faster with open-source low-code
Appsmith is an open-source low-code platform enabling developers to build custom internal applications rapidly.
94.0
Open-source AI app builders
10 ranked, with a plain verdict on every entry.
Appsmith leads this ranking for Developers building internal tools, and connects to any database, SaaS tool or API. Nimbalyst is built for small nimble teams working with AI agents, and surfaces every AI edit as a diff for inspection before application. OpenHands is aimed at engineering teams seeking autonomous SDLC automation, and allows deployment in private VPCs with secure sandbox isolation.
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The ranking, in detail
02
Nimbalyst
The visual workspace for Codex and Claude Code
Nimbalyst is a visual workspace for Claude Code and Codex. It allows users to edit sessions, tasks, and code in one place with multiplayer support.
90.0
03
OpenHands
The open platform for agentic software development
OpenHands is an open-source platform for building and running AI coding agents. It provides the interface, automations, and control layer needed to scale from local use to organisational deployment.
90.0
04
ToolJet
AI-native platform for building governed internal apps
ToolJet is an AI app builder designed for creating internal tools. It allows teams to generate fully functional applications using natural language prompts.
90.0
05
Budibase
Agents, workflows & internal tools made easy
Budibase is an open-source platform for building internal tools and automating workflows. It enables teams to create AI agents that handle requests using their own data and systems.
88.0
06
Kilo
One open agent for every developer workflow
Kilo is an open-source AI coding agent available in IDEs, CLI and cloud. It offers a unified platform for developers to build with AI.
88.0
07
Flowise
Build AI agents visually
Flowise is an open-source platform for building AI agents visually. It enables the creation of agentic systems through modular building blocks.
86.0
08
Puck
The agentic visual editor for React
Puck is an agentic visual editor for React that allows teams to build production-ready interfaces. It enables users and agents to generate personalised experiences within the application.
84.0
09
LangFlow
Low-code AI builder for agentic and RAG applications
Langflow is a low-code platform for building and deploying AI agents and RAG applications. It supports major LLMs and vector databases with a growing library of tools.
82.0
10
APIgen
From idea to API & UI in seconds
APIgen is an AI-powered generator that transforms ideas into production-ready REST APIs and Angular frontends. It allows users to define data models manually or via AI to instantly create full application stacks.
78.0
Not on this ranking?
Positions 1, 2 and 3 are available to buy for twelve months.
Frequently asked questions
Who are these open-source AI app builders built for?
Appsmith and Puck both say they are built for Developers building internal tools, and Nimbalyst for small nimble teams working with AI agents. OpenHands says it is built for engineering teams seeking autonomous SDLC automation.
What should a buyer check before signing up?
Nimbalyst states that Nimbalyst requires users to provide their own API key or subscription for AI features. Those are the limits each AI tool publishes itself, not a full account of any plan.
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