Top 12 Open-Source Alternatives to Formstack

The top open-source alternatives to Formstack are XLForm, LimeSurvey, and Birdeye. One of the criteria for ordering this list is the number of mentions that products have on reliable external sources. You can suggest additional sources through the form here.

XLForm Landing Page
1

XLForm

XLForm is an iOS library to create dynamic table-view forms.
Pricing:
- Open Source
#Surveys #Form Builder #Forms And Surveys
LimeSurvey Landing Page
2

LimeSurvey

LimeSurvey: the Online-Umfrage Tool - Open-Source Suryeys
Pricing:
- Open Source
#Surveys #Form Builder #Forms And Surveys 1 social mentions
Birdeye Landing Page
3

Birdeye

#1 most trusted reputation and customer experience platform for local business
Pricing:
- Open Source
- Paid
- Free Trial
- $299.0 / Monthly
#Reputation Management #Online Reviews #Customer Experience Management 6 social mentions
pdfFiller Landing Page
4

pdfFiller

A comprehensive online document management platform that provides the services of an online editor, cloud storage platform, and a signature request manager, all in one package.
Pricing:
- Open Source
- Paid
- Free Trial
- $8.0 / Monthly (annual commitment)
#PDF Tools #PDF Editor #eSignature 7 social mentions
SurveyJS Landing Page
5

SurveyJS

Feature rich and open source surveys for embedding into websites.
Pricing:
- Open Source
#Surveys #Form Builder #Forms And Surveys 10 social mentions
Headlessforms - Form Backend Landing Page
6

Headlessforms - Form Backend

Build high-quality HTML forms in minutes -- we have the Form Backend
Pricing:
- Open Source
- Freemium
- Free Trial
- $8.0 / Monthly
#Backend As A Service #Forms #Headless CMS
Airform Landing Page
7

Airform

Functional HTML forms for Front-End Developers.
Pricing:
- Open Source
#Form Builder #Surveys #Forms And Surveys 3 social mentions
Form Tools Landing Page
8

Form Tools

Form Tools is a powerful, flexible, free and open source PHP/MySQL script you install on your...
Pricing:
- Open Source
#Surveys #Form Builder #Forms And Surveys 5 social mentions
Advanced Custom Fields Landing Page
9

Advanced Custom Fields

Custom field and custom content plugin for WordPress
Pricing:
- Open Source
#Surveys #Form Builder #Web Development Tools
Sheet Monkey Landing Page
10

Sheet Monkey

Submit your forms to Google Sheets
Pricing:
- Open Source
- Freemium
#Developer Tools #Surveys #Form Builder 3 social mentions
Boolean Landing Page
11

Boolean

Send single question yes/no surveys
Pricing:
- Open Source
#Surveys #Slack #Web App
WP Rocket Landing Page
12

WP Rocket

WP Rocket offers a caching plugin for Wordpress.
Pricing:
- Open Source
#CDN #Surveys #Tool 13 social mentions