# 6 Best Open Source Alternatives for Fillout

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

Looking for the best open source alternative for Fillout? Compare 6 verified free and open source alternatives to Fillout (Formbricks, HeyForm, OpnForm) with license details, self-hosting requirements, and practical trade-offs.

## Fillout Overview & Subscription Cost
- **Product**: Fillout
- **Category**: [design](https://caniforkit.com/category/design)
- **Paid Subscription Price**: $20/month per seat
- **1-Seat Annualized Cost**: $240/year
- **5-Person Team Annualized Cost**: $1,200/year
- **10-Person Team Annualized Cost**: $2,400/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 Fillout or rebuilding it from scratch, deploy one of the 6 battle-tested open-source alternatives like Formbricks.

## Verified Free & Open Source Alternatives

| Alternative | Type | License | Runs On | GitHub Stars | Head-to-Head |
| --- | --- | --- | --- | --- | --- |
| [Formbricks](https://caniforkit.com/fork/formbricks) | Open Source | AGPL-3.0 | Self-host | ★ 13.2k | [Compare vs Fillout](https://caniforkit.com/vs/fillout-vs-formbricks) |
| [HeyForm](https://caniforkit.com/fork/heyform) | Open Source | AGPL-3.0 | Self-host | ★ 9.1k | [Compare vs Fillout](https://caniforkit.com/vs/fillout-vs-heyform) |
| [OpnForm](https://caniforkit.com/fork/opnform) | Open Source | AGPL-3.0 | Self-host | ★ 4k | [Compare vs Fillout](https://caniforkit.com/vs/fillout-vs-opnform) |
| [LimeSurvey](https://caniforkit.com/fork/limesurvey) | Open Source | GPL-2.0+ | Self-host | ★ 3.8k | [Compare vs Fillout](https://caniforkit.com/vs/fillout-vs-limesurvey) |
| [Ikiform](https://caniforkit.com/fork/ikiform) | Open Source | Open Source | Local | ★ 355 | [Compare vs Fillout](https://caniforkit.com/vs/fillout-vs-ikiform) |
| [Formizee](https://caniforkit.com/fork/formizee) | Open Source | Open Source | Local | ★ 184 | [Compare vs Fillout](https://caniforkit.com/vs/fillout-vs-formizee) |

## In-Depth Alternative Profiles

### Formbricks
- **Fork Page**: [Formbricks Profile](https://caniforkit.com/fork/formbricks)
- **Head-to-Head Comparison**: [Fillout vs Formbricks](https://caniforkit.com/vs/fillout-vs-formbricks)
- **Official Website**: https://formbricks.com/
- **Source Code Repository**: https://github.com/formbricks/formbricks
- **License**: AGPL-3.0
- **Runs On**: Self-host
- **GitHub Stars**: 13.2k
- **Maintenance Activity**: nov 2026
- **Supported Platforms**: web, self-hosted, self-host, real ops
- **Summary**: Collect feedback across websites, apps, and emails with targeted surveys, user segmentation, and GDPR-compliant data handling. Self-host or use the cloud.
- **The Catch vs Fillout**: Formbricks is excellent for product and customer feedback, but it lacks SurveyMonkey's mature research panel, broad question-bank ecosystem, and advanced statistical reporting.
- **Installation**: Hosted signup, one-click Ubuntu installer, Docker Compose, or Helm
- **Setup**: The current self-host stack includes PostgreSQL, Redis/Valkey, Formbricks Hub and Cube; uploads need object storage, and bundled AI needs an NVIDIA GPU.
- **Data Storage**: Hosted data lives in Formbricks Cloud; self-hosted survey and response data lives in PostgreSQL, cache/jobs in Redis or Valkey, analytics through Cube, and uploads in S3-compatible storage.

### HeyForm
- **Fork Page**: [HeyForm Profile](https://caniforkit.com/fork/heyform)
- **Head-to-Head Comparison**: [Fillout vs HeyForm](https://caniforkit.com/vs/fillout-vs-heyform)
- **Official Website**: https://heyform.net
- **Source Code Repository**: https://github.com/heyform/heyform
- **License**: AGPL-3.0
- **Runs On**: Self-host
- **GitHub Stars**: 9.1k
- **Maintenance Activity**: nov 2026
- **Supported Platforms**: web, self-hosted, docker to self-host
- **Summary**: A versatile form builder for crafting custom surveys, quizzes, and data collection tools with advanced features and integrations.
- **The Catch vs Fillout**: HeyForm offers a visual form builder and unlimited self-hosted responses, but its design polish and hosting simplicity are weaker once you leave the hosted service and run MongoDB plus KeyDB yourself.
- **Installation**: Hosted signup, or Docker Compose with MongoDB and KeyDB/Redis
- **Setup**: Self-hosting needs Docker, a domain, reverse proxy/TLS, email configuration, and persistent database/storage volumes.
- **Data Storage**: Hosted data lives in HeyForm Cloud; self-hosted forms and responses live in MongoDB, cache/session data in KeyDB/Redis, and uploads on the server or S3-compatible storage.

### OpnForm
- **Fork Page**: [OpnForm Profile](https://caniforkit.com/fork/opnform)
- **Head-to-Head Comparison**: [Fillout vs OpnForm](https://caniforkit.com/vs/fillout-vs-opnform)
- **Official Website**: https://opnform.com
- **Source Code Repository**: https://github.com/JhumanJ/opnform
- **License**: AGPL-3.0
- **Runs On**: Self-host
- **GitHub Stars**: 4k
- **Maintenance Activity**: nov 2026
- **Supported Platforms**: web, self-hosted, docker to self-host
- **Summary**: A versatile open-source form builder for collecting data, managing submissions, and integrating with your favorite tools.
- **The Catch vs Fillout**: OpnForm gives you open-source forms and self-hosted responses, but the free self-hosted workspace is limited to two users and its design controls are less polished than Fomr's.
- **Installation**: Hosted signup, or the production Docker deployment
- **Setup**: Self-hosting requires Docker, a database, a public domain/TLS and mail/storage configuration; the free self-hosted edition allows two workspace users.
- **Data Storage**: Hosted data lives in OpnForm Cloud; self-hosted forms and submissions live in MySQL or PostgreSQL, with uploaded files on configured local or object storage.

### LimeSurvey
- **Fork Page**: [LimeSurvey Profile](https://caniforkit.com/fork/limesurvey)
- **Head-to-Head Comparison**: [Fillout vs LimeSurvey](https://caniforkit.com/vs/fillout-vs-limesurvey)
- **Official Website**: https://limesurvey.org
- **Source Code Repository**: https://github.com/LimeSurvey/LimeSurvey
- **License**: GPL-2.0+
- **Runs On**: Self-host
- **GitHub Stars**: 3.8k
- **Maintenance Activity**: nov 2026
- **Supported Platforms**: web, self-hosted, self-host, real ops
- **Summary**: LimeSurvey is a powerful open-source tool for creating customizable online surveys, polls, and questionnaires.
- **The Catch vs Fillout**: LimeSurvey has far deeper survey logic than most free tools, but its dense administration and self-hosting burden are much less approachable than SurveyMonkey, while its free cloud plan permits only 25 responses monthly.
- **Installation**: Hosted Cloud signup, or download the Community Edition PHP package and run its web installer
- **Setup**: The useful unlimited route is self-hosting, which requires a PHP web server, database, mail, updates and backups; the hosted free plan permits only 25 responses per month.
- **Data Storage**: Cloud data lives in LimeSurvey's selected hosting region; self-hosted surveys and responses live in MySQL, MariaDB, PostgreSQL or Microsoft SQL Server, with multiple tabular/statistical export formats.

### Ikiform
- **Fork Page**: [Ikiform Profile](https://caniforkit.com/fork/ikiform)
- **Head-to-Head Comparison**: [Fillout vs Ikiform](https://caniforkit.com/vs/fillout-vs-ikiform)
- **Official Website**: https://www.ikiform.com
- **Source Code Repository**: https://github.com/preetsuthar17/ikiform
- **License**: Open Source
- **Runs On**: Local
- **GitHub Stars**: 355
- **Maintenance Activity**: nov 2026
- **Supported Platforms**: desktop, cross-platform, one-click install
- **Summary**: Build beautiful, interactive forms with AI assistance. Open-source alternative to Google Forms with unlimited submissions, advanced analytics, and seamless integrations.
- **The Catch vs Fillout**: Community-driven open source project without dedicated enterprise SLAs.
- **Installation**: Clone https://github.com/preetsuthar17/ikiform 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.

### Formizee
- **Fork Page**: [Formizee Profile](https://caniforkit.com/fork/formizee)
- **Head-to-Head Comparison**: [Fillout vs Formizee](https://caniforkit.com/vs/fillout-vs-formizee)
- **Official Website**: https://formizee.com
- **Source Code Repository**: https://github.com/formizee/formizee
- **License**: Open Source
- **Runs On**: Local
- **GitHub Stars**: 184
- **Maintenance Activity**: nov 2026
- **Supported Platforms**: desktop, cross-platform, one-click install
- **Summary**: Formizee is an open-source platform for designing, building, and analyzing forms, offering an affordable all-in-one solution
- **The Catch vs Fillout**: Community-driven open source project without dedicated enterprise SLAs.
- **Installation**: Clone https://github.com/formizee/formizee 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 Fillout?
The top free alternative to Fillout is Formbricks (open source, AGPL-3.0). Collect feedback across websites, apps, and emails with targeted surveys, user segmentation, and GDPR-compliant data handling. Self-host or use the cloud. Other popular Fillout replacements include HeyForm, OpnForm, LimeSurvey.

### How much does switching from Fillout to a free alternative save?
Fillout starts at $20/month per seat ($240/year). Switching a 5-person team to a free alternative like Formbricks saves $1,200 per year in software subscription fees.

### What is the catch when switching away from Fillout?
While Formbricks replaces core Fillout features without subscription fees, the real-world trade-off is: Formbricks is excellent for product and customer feedback, but it lacks SurveyMonkey's mature research panel, broad question-bank ecosystem, and advanced statistical reporting.

## Related

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