Stream vs Klaviyo

Stream (Build scalable in-app chat, feeds, and live video with AI moderation capabilities in hours, not weeks.) and Klaviyo both appear on the Smoower Developer Ecosystem Index.

Klaviyo (rank #237) holds a narrow lead over Stream (rank #317) on the overall Smoower ecosystem score (48 vs 44). The gap of 4 points reflects composite signals across code, docs, community and reach.

On code quality (the state of repositories, tests, releases and polish), Stream is ahead of Klaviyo. On education (docs, guides and learning material for developers), Klaviyo is slightly ahead of Stream. On reach (how visible the ecosystem is beyond its own repos), Klaviyo is ahead of Stream. On momentum (release cadence and how fast the ecosystem moves), Stream is clearly ahead of Klaviyo.

Stream carries 35,664 GitHub stars across 487 public repos, with 84 repositories active in the last 90 days and 44 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 Stream's footprint is roughly 62.2x larger, which usually shows up in downstream signals like inbound issues and third party integrations.

Stream is the stronger read for anyone weighting momentum. Klaviyo looks better where reach 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.