LimeSurvey might be a bit more popular than Pendo. We know about 1 link to it since March 2021 and only 1 link to Pendo. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
Just to clarify - are you looking for something that will gather platform usage data for later analysis, or you have a dataset and want to know how to analyze it? If it's the former - give Pendo a look. My company doesn't use it (because we're 100% on-prem software, so in-product telemetry isn't a thing for us) but I know of companies who are using and loving Pendo for gathering metrics. It's supposed to be the... Source: about 1 year ago
Otherwise check out https://limesurvey.org. Source: over 2 years ago
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