Grammarly vs PostHog

Grammarly (Millions of users rely on Grammarly's AI-powered products to make their messages, documents, and social media posts clear, mistake-free, and impactful.) and PostHog (The single platform to analyze, test, observe, and deploy new features) both appear on the Smoower Developer Ecosystem Index.

PostHog (rank #32) holds a meaningful lead over Grammarly (rank #602) on the overall Smoower ecosystem score (63 vs 34). The gap of 29 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 Grammarly. On education (docs, guides and learning material for developers), PostHog is slightly ahead of Grammarly. On community (issue response, PR reviews and discussion health), PostHog is clearly ahead of Grammarly. On reach (how visible the ecosystem is beyond its own repos), Grammarly is slightly ahead of PostHog. On momentum (release cadence and how fast the ecosystem moves), PostHog is clearly ahead of Grammarly.

Grammarly carries 4,355 GitHub stars across 23 public repos, with 0 repositories active in the last 90 days and 0 external contributors on record. PostHog shows 40,819 stars across 357 public repos, 87 active in the last 90 days and 210 external contributors. The star gap on its own does not decide the comparison, but PostHog's footprint is roughly 9.4x larger, which usually shows up in downstream signals like inbound issues and third party integrations.

Grammarly is the stronger read for anyone weighting reach. PostHog looks better where momentum 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.