# 4 Best Open Source Alternatives for Fastgen

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

Looking for the best open source alternative for Fastgen? Compare 4 verified free and open source alternatives to Fastgen (ToolJet, Budibase, Trigger) with license details, self-hosting requirements, and practical trade-offs.

## Fastgen Overview & Subscription Cost
- **Product**: Fastgen
- **Category**: [forms](https://caniforkit.com/category/forms)
- **Paid Subscription Price**: $15/month per seat
- **1-Seat Annualized Cost**: $180/year
- **5-Person Team Annualized Cost**: $900/year
- **10-Person Team Annualized Cost**: $1,800/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 Fastgen or rebuilding it from scratch, deploy one of the 4 battle-tested open-source alternatives like ToolJet.

## Verified Free & Open Source Alternatives

| Alternative | Type | License | Runs On | GitHub Stars | Head-to-Head |
| --- | --- | --- | --- | --- | --- |
| [ToolJet](https://caniforkit.com/fork/tooljet) | Open Source | Open Source | Self-host | ★ 41.2k | [Compare vs Fastgen](https://caniforkit.com/vs/fastgen-vs-tooljet) |
| [Budibase](https://caniforkit.com/fork/budibase) | Open Source | GPL-3.0 | Self-host | ★ 28.4k | [Compare vs Fastgen](https://caniforkit.com/vs/fastgen-vs-budibase) |
| [Trigger](https://caniforkit.com/fork/trigger) | Open Source | Open Source | Local | ★ 16.7k | [Compare vs Fastgen](https://caniforkit.com/vs/fastgen-vs-trigger) |
| [Hatchet](https://caniforkit.com/fork/hatchet) | Open Source | Open Source | Self-host | ★ 8.2k | [Compare vs Fastgen](https://caniforkit.com/vs/fastgen-vs-hatchet) |

## In-Depth Alternative Profiles

### ToolJet
- **Fork Page**: [ToolJet Profile](https://caniforkit.com/fork/tooljet)
- **Head-to-Head Comparison**: [Fastgen vs ToolJet](https://caniforkit.com/vs/fastgen-vs-tooljet)
- **Official Website**: https://tooljet.com
- **Source Code Repository**: https://github.com/tooljet/tooljet
- **License**: Open Source
- **Runs On**: Self-host
- **GitHub Stars**: 41.2k
- **Maintenance Activity**: nov 2026
- **Supported Platforms**: web, self-hosted, docker to self-host
- **Summary**: Open-source low-code platform for creating custom internal tools, dashboards, and admin panels with a drag-and-drop interface
- **The Catch vs Fastgen**: Requires self-hosting setup, updates, and server maintenance compared to managed Fastgen.
- **Installation**: Clone https://github.com/tooljet/tooljet 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.

### Budibase
- **Fork Page**: [Budibase Profile](https://caniforkit.com/fork/budibase)
- **Head-to-Head Comparison**: [Fastgen vs Budibase](https://caniforkit.com/vs/fastgen-vs-budibase)
- **Official Website**: https://budibase.com
- **Source Code Repository**: https://github.com/budibase/budibase
- **License**: GPL-3.0
- **Runs On**: Self-host
- **GitHub Stars**: 28.4k
- **Maintenance Activity**: nov 2026
- **Supported Platforms**: web, self-hosted, docker to self-host
- **Summary**: Low-code platform for creating custom business applications quickly. Design, automate, and deploy with ease.
- **The Catch vs Fastgen**: It is built mainly for responsive internal web apps, not AppSheet's installable mobile apps with offline field use and spreadsheet-driven rules.
- **Installation**: Docker image or Docker Compose; Kubernetes is also supported
- **Setup**: Requires Docker and persistent storage; production use also means owning upgrades, TLS, backups, and database/network access
- **Data Storage**: Built-in app data and app definitions are stored in CouchDB, files in MinIO/S3-compatible object storage, and connected external data remains in its source system

### Trigger
- **Fork Page**: [Trigger Profile](https://caniforkit.com/fork/trigger)
- **Head-to-Head Comparison**: [Fastgen vs Trigger](https://caniforkit.com/vs/fastgen-vs-trigger)
- **Official Website**: https://trigger.dev/
- **Source Code Repository**: https://github.com/triggerdotdev/trigger.dev
- **License**: Open Source
- **Runs On**: Local
- **GitHub Stars**: 16.7k
- **Maintenance Activity**: nov 2026
- **Supported Platforms**: desktop, cross-platform, one-click install
- **Summary**: Open source TypeScript platform for building and deploying AI agents and background workflows with retries, queues, observability, and elastic scaling.
- **The Catch vs Fastgen**: Community-driven open source project without dedicated enterprise SLAs.
- **Installation**: Clone https://github.com/triggerdotdev/trigger.dev 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.

### Hatchet
- **Fork Page**: [Hatchet Profile](https://caniforkit.com/fork/hatchet)
- **Head-to-Head Comparison**: [Fastgen vs Hatchet](https://caniforkit.com/vs/fastgen-vs-hatchet)
- **Official Website**: https://hatchet.run/
- **Source Code Repository**: https://github.com/hatchet-dev/hatchet
- **License**: Open Source
- **Runs On**: Self-host
- **GitHub Stars**: 8.2k
- **Maintenance Activity**: nov 2026
- **Supported Platforms**: web, self-hosted, docker to self-host
- **Summary**: Durable orchestration platform for managing AI agents, scheduling background tasks, and running mission-critical workflows.
- **The Catch vs Fastgen**: Requires self-hosting setup, updates, and server maintenance compared to managed Fastgen.
- **Installation**: Clone https://github.com/hatchet-dev/hatchet 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.

## Frequently Asked Questions

### What is the best free alternative to Fastgen?
The top free alternative to Fastgen is ToolJet (open source, Open Source). Open-source low-code platform for creating custom internal tools, dashboards, and admin panels with a drag-and-drop interface Other popular Fastgen replacements include Budibase, Trigger, Hatchet.

### How much does switching from Fastgen to a free alternative save?
Fastgen starts at $15/month per seat ($180/year). Switching a 5-person team to a free alternative like ToolJet saves $900 per year in software subscription fees.

### What is the catch when switching away from Fastgen?
While ToolJet replaces core Fastgen features without subscription fees, the real-world trade-off is: Requires self-hosting setup, updates, and server maintenance compared to managed Fastgen.

## Related

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