Free open source alternative app list of Typeform :

MikeCRM

MikeCRM is an online form builder, contact manager and market explorer, which affirmatively strengthens you with the ability to collect data, discover potential customers and win deals.

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Jotform

Create forms and surveys for free with Jotform’s drag-and-drop form builder. Start collecting registrations, applications, orders, and payments today.

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WuFoo

Wufoo's online form builder helps you create custom forms in minutes. Use Wufoo to create registration forms, application forms, surveys, contact forms, payment forms and more. Sign up free!

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Google Form

Google docs form.

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Xiaoju Survey

XIAOJUSURVEY is a set of lightweight and safe questionnaire system base, providing one-stop product-level solutions for individuals and enterprises to quickly meet various online survey scenarios. The internal system has accumulated 40+ question types and 100+ selected templates, which are suitable for market research, customer satisfaction research, online examination, voting, reporting, assessment and many other scenarios. In terms of data ability, after hundreds of millions of degrees of grinding, it has precipitated online report capabilities such as sub-topic statistics, cross analysis, and multi-channel analysis, quickly meeting professional analysis. The open source project is centered on building a research base, building around platform capabilities, engineering architecture, and research and development system, and you can "quickly" create an "exclusive" questionnaire system.

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Others are looking for free open source alternatives of following apps:

AdGuard DNS

AdGuard DNS is a DNS-based service that blocks ads, trackers, and malicious websites.

AdGuard

AdGuard is a cross-platform ad blocker that filters web content and protects privacy.

AI & Machine Learning

Free open-source AI & machine learning tools.

Ad Blocker

Ad Blocker is a browser tool that removes intrusive ads and pop-ups from web pages.

Adobe Premiere Pro

Adobe Premiere Pro is a professional video editing software for film, TV, and web.

Acorn 7

Acorn 7 is a Mac image editor for editing photos and creating graphics.