Klaviyo vs Spreedly

Klaviyo and Spreedly (Simple and secure PCI compliance and payment forwarding.) both appear on the Smoower Developer Ecosystem Index.

Klaviyo (rank #237) holds a modest lead over Spreedly (rank #728) on the overall Smoower ecosystem score (48 vs 30). The gap of 18 points reflects composite signals across code, docs, community and reach.

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

Klaviyo carries 573 GitHub stars across 117 public repos, with 23 repositories active in the last 90 days and 17 external contributors on record. Spreedly shows 418 stars across 67 public repos, 10 active in the last 90 days and 2 external contributors.

Klaviyo is the stronger read for anyone weighting community. Spreedly makes more sense for teams already using its adjacent tools. The table below breaks the scores down pillar by pillar; the linked profiles cover the underlying repos, docs and community signals in full.