OpnForm is an open-source no-code form builder for everything from a contact form to a multi-step survey, with conditional logic and unlimited submissions. You can self-host it with Docker or use a hosted plan. The core is released under the AGPLv3 license, and forms embed anywhere or run as a standalone page.
Reviewed by Marcus Holmberg
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Threat level
Covered
A covered pick. Anyone can use it as a private drop-in, with no setup or know-how. Enough for most people. Threat levels
Our take
OpnForm hits the sweet spot for most people leaving Google Forms: a no-code builder that feels familiar, with conditional logic for branching questions and the freedom to keep every submission in a database you own. Self-host it with Docker and your respondents’ answers never touch an advertising company, while the AGPLv3 core means the project is not hostage to one vendor. The honest catch is that it is led by a small team, so the pace and support ride on a thin bench, and the hosted free tier comes with limits you will outgrow. Pick it when you want an everyday form builder that respects the people filling it out. If your needs run to heavyweight surveys, Formbricks is the deeper tool.
Website at a glance
opnform.com
C score 55
Basic website security headers
Graded by Mozilla HTTP Observatory, tested today
Inspect this site yourself
Measures the security configuration of the tool's own website, not the privacy of the product itself. A strong tool can still score low here.
OpnForm alternatives
Formbricks Open-source survey and experience-management platform for link and in-app surveys, self-hosted or run on its GDPR-compliant cloud. Based in Germany.
Formgrid Open-source form backend that turns any HTML form into a secure endpoint, with spam protection and email alerts, self-hosted with Docker. MIT licensed.
Frequently asked
- Is OpnForm free?
- The core is free and open-source under the AGPLv3 license, so self-hosting it costs you only the server it runs on, with unlimited forms and submissions. A hosted plan exists if you would rather not run your own instance, and its free tier carries some limits.
- Can OpnForm do conditional logic?
- Yes. The builder supports logic jumps and conditional fields, so questions can appear or hide based on earlier answers. That puts it on par with the mainstream builders for branching forms, without sending your respondents through a tracker.
- Is OpnForm safe to self-host?
- It is built to be. The open-source core deploys with Docker and stores submissions in your own database, so the data never leaves infrastructure you control. As with any self-hosted app, the security depends on you keeping the instance updated.
- Who maintains OpnForm?
- A small team leads it, which keeps iteration fast but means a thinner bus factor than a large vendor. The code is open under AGPLv3, so the project is not locked to one company and you can run or fork it regardless.
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