PostHog vs Semrush

PostHog (The single platform to analyze, test, observe, and deploy new features) and Semrush (We do love open source and have an opportunity to make it better from now.) both appear on the Smoower Developer Ecosystem Index.

PostHog (rank #30) holds a modest lead over Semrush (rank #317) on the overall Smoower ecosystem score (63 vs 44). The gap of 19 points reflects composite signals across code, docs, community and reach.

On code quality (the state of repositories, tests, releases and polish), PostHog is clearly ahead of Semrush. On education (docs, guides and learning material for developers), Semrush is slightly ahead of PostHog. On community (issue response, PR reviews and discussion health), PostHog is ahead of Semrush. On reach (how visible the ecosystem is beyond its own repos), Semrush is slightly ahead of PostHog. On momentum (release cadence and how fast the ecosystem moves), PostHog is clearly ahead of Semrush.

PostHog carries 40,775 GitHub stars across 357 public repos, with 87 repositories active in the last 90 days and 212 external contributors on record. Semrush shows 454 stars across 11 public repos, 2 active in the last 90 days and 7 external contributors. The star gap on its own does not decide the comparison, but PostHog's footprint is roughly 89.8x larger, which usually shows up in downstream signals like inbound issues and third party integrations.

PostHog is the stronger read for anyone weighting momentum. Semrush looks better where education is the deciding factor. The table below breaks the scores down pillar by pillar; the linked profiles cover the underlying repos, docs and community signals in full.