PostHog significantly outpaces OpenReplay in community adoption with 37,396 stars compared to 12,375 stars on GitHub. This 3.0x difference suggests PostHog has a much larger and more active community. In terms of developer contributions, PostHog has 3,112 forks, indicating strong developer engagement.

Both projects show recent activity, with OpenReplay last updated 9 hours ago and PostHog 2 hours ago.

Both tools share common technology foundations, being built with JavaScript, CSS, Bash, Typescript, JSX, Python, Golang, C, Objective-C. However, they differ in their additional technology choices: OpenReplay uses Swift, Ruby, Kotlin, MATLAB while PostHog leverages SCSS, Rust, C++.

PostHog has been in development longer, starting 7 years ago, compared to OpenReplay which began 5 years ago. This 1.3-year head start suggests PostHog may have more mature features and established processes.

Both tools serve similar use cases in Product Analytics. However, they also have distinct specializations: OpenReplay also focuses on Performance Monitoring (APM).

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