The best open source alternative to Fastgen is ToolJet. If that doesn't suit you, we've compiled a ranked list of other open source Fastgen alternatives to help you find a suitable replacement. Other interesting open source alternatives to Fastgen are: Budibase, Trigger, and Hatchet.
Fastgen alternatives are mainly Low-Code/No-Code Platforms but may also be Backend-as-a-Service (BaaS) Tools or Job Scheduling Tools. Browse these if you want a narrower list of alternatives or looking for a specific functionality of Fastgen.
Open-source low-code platform for creating custom internal tools, dashboards, and admin panels with a drag-and-drop interface

ToolJet is a powerful open-source low-code platform designed to revolutionize the way businesses create internal tools. With its intuitive drag-and-drop interface, ToolJet enables teams to rapidly build custom applications, dashboards, and admin panels without extensive coding knowledge.
Key benefits of ToolJet include:
ToolJet's versatility makes it ideal for startups, SMEs, and enterprises alike, enabling teams across various departments to create the tools they need to optimize their workflows and boost productivity.
Looking for open source alternatives to other popular services? Check out other posts in the alternatives series and openalternative.co, a directory of open source software with filters for tags and alternatives for easy browsing and discovery.
Low-code platform for creating custom business applications quickly. Design, automate, and deploy with ease.

Budibase is a revolutionary low-code platform that empowers businesses to create custom web applications without extensive coding knowledge. With its intuitive interface and powerful features, Budibase accelerates the development process and puts the power of app creation in the hands of both developers and non-developers alike.
Key benefits of Budibase include:
Whether you're creating internal tools, customer portals, or admin panels, Budibase provides the flexibility and power to bring your ideas to life quickly and efficiently. Join thousands of businesses already using Budibase to transform their operations and drive innovation.
A developer-friendly platform for building, scheduling, and managing background jobs in your applications with minimal setup.

Trigger is a powerful open-source solution that simplifies the process of creating and managing background jobs in your applications. With its intuitive API and seamless integration capabilities, Trigger empowers developers to focus on building features rather than worrying about infrastructure.
Key benefits of Trigger include:
Whether you're building a small side project or a large-scale application, Trigger provides the tools and flexibility you need to manage background processes effectively, allowing you to create more responsive and efficient applications.
Durable orchestration platform for managing AI agents, scheduling background tasks, and running mission-critical workflows.

Hatchet is a durable orchestration platform that helps engineering teams build and deploy mission-critical AI agents, durable workflows, and background tasks. It supports applications written in Python, Typescript, Go and Ruby, and can be used as a service through Hatchet Cloud or self-hosting (it's open-source and 100% MIT-licensed). Hatchet provides a full platform for queuing, automatic retries, real-time monitoring, alerting, and logging.
While Hatchet is particularly well-suited for:
Whether you're a small startup or a large enterprise, Hatchet provides the tools and flexibility needed to accelerate your development cycles, improve code quality, and maintain robust, scalable cloud infrastructure.