Grammarly vs Klaviyo

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 Klaviyo both appear on the Smoower Developer Ecosystem Index.

Klaviyo (rank #237) holds a modest lead over Grammarly (rank #602) on the overall Smoower ecosystem score (48 vs 34). The gap of 14 points reflects composite signals across code, docs, community and reach.

On code quality (the state of repositories, tests, releases and polish), Klaviyo is ahead of Grammarly. On education (docs, guides and learning material for developers), Klaviyo is slightly ahead of Grammarly. On community (issue response, PR reviews and discussion health), Klaviyo is clearly ahead of Grammarly. On reach (how visible the ecosystem is beyond its own repos), Klaviyo is slightly ahead of Grammarly. On momentum (release cadence and how fast the ecosystem moves), Klaviyo is slightly 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. Klaviyo shows 573 stars across 117 public repos, 23 active in the last 90 days and 17 external contributors. The star gap on its own does not decide the comparison, but Grammarly's footprint is roughly 7.6x larger, which usually shows up in downstream signals like inbound issues and third party integrations.

Grammarly is worth a look for teams already invested in its stack. Klaviyo looks better where community 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.