Klarna vs sendinblue (now Brevo)

Klarna and sendinblue (now Brevo) both appear on the Smoower Developer Ecosystem Index.

Klarna (rank #257) holds a narrow lead over sendinblue (now Brevo) (rank #372) on the overall Smoower ecosystem score (47 vs 42). The gap of 5 points reflects composite signals across code, docs, community and reach.

On code quality (the state of repositories, tests, releases and polish), Klarna is ahead of sendinblue (now Brevo). On community (issue response, PR reviews and discussion health), Klarna is ahead of sendinblue (now Brevo). On reach (how visible the ecosystem is beyond its own repos), Klarna is clearly ahead of sendinblue (now Brevo). On momentum (release cadence and how fast the ecosystem moves), Klarna is ahead of sendinblue (now Brevo).

Klarna carries 2,965 GitHub stars across 139 public repos, with 8 repositories active in the last 90 days and 2 external contributors on record. sendinblue (now Brevo) shows 653 stars across 37 public repos, 0 active in the last 90 days and 0 external contributors. The star gap on its own does not decide the comparison, but Klarna's footprint is roughly 4.5x larger, which usually shows up in downstream signals like inbound issues and third party integrations.

Klarna is the stronger read for anyone weighting reach. sendinblue (now Brevo) 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.