Open-source Featurebase alternatives

2 open-source alternatives to Featurebase, curated: Fider, LogChimp. Each is open-source; compare license and links below.

ToolWhat it isLicenseOpen source
FiderOSS alt to Featurebase; ~4458 stars; via openalternative.coAGPL-3.0yes
LogChimpOSS alt to Featurebase; ~1114 stars; via openalternative.coApache-2.0yes

Positioning is each tool's own description; open-source status is evidence-based. See each linked entry for details.