Klaviyo vs Omnisend

Klaviyo and Omnisend (Omnisend’s AI-powered platform helps ecommerce brands centralize email, SMS, and popups with automation, segmentation, and AI content tools.) both appear on the Smoower Developer Ecosystem Index.

Klaviyo (rank #237) holds a modest lead over Omnisend (rank #625) on the overall Smoower ecosystem score (48 vs 33). The gap of 15 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 Omnisend. On education (docs, guides and learning material for developers), Klaviyo is ahead of Omnisend. On community (issue response, PR reviews and discussion health), Klaviyo is clearly ahead of Omnisend. On reach (how visible the ecosystem is beyond its own repos), Omnisend is slightly ahead of Klaviyo. On momentum (release cadence and how fast the ecosystem moves), Omnisend is clearly ahead of Klaviyo.

Klaviyo carries 573 GitHub stars across 117 public repos, with 23 repositories active in the last 90 days and 17 external contributors on record. Omnisend shows 5 stars across 18 public repos, 9 active in the last 90 days and 4 external contributors. The star gap on its own does not decide the comparison, but Klaviyo's footprint is roughly 114.6x larger, which usually shows up in downstream signals like inbound issues and third party integrations.

Klaviyo is the stronger read for anyone weighting community. Omnisend 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.