GrowthBook significantly outpaces Abby in community adoption with 8,070 stars compared to 167 stars on GitHub. This 48.3x difference suggests GrowthBook has a much larger and more active community. In terms of developer contributions, GrowthBook has 807 forks, indicating moderate developer engagement.

GrowthBook shows more recent development activity with its last commit 4 hours ago, while Abby was last updated 1 year ago. This suggests GrowthBook is being more actively maintained.

Both tools share common technology foundations, being built with JavaScript, CSS, Typescript, JSX, Next.js. However, they differ in their additional technology choices: Abby uses SvelteKit while GrowthBook leverages Bash, Python, SCSS.

GrowthBook has been in development longer, starting 5 years ago, compared to Abby which began 3 years ago. This 2.0-year head start suggests GrowthBook may have more mature features and established processes.

Abby is licensed under AGPL-3.0, while GrowthBook's license terms are not publicly specified.

Both tools serve similar use cases in Feature Flags. However, they also have distinct specializations: GrowthBook extends into Product Analytics.

Both Abby and GrowthBook offer self-hosting capabilities, giving you full control over your data and infrastructure.