Klarna vs Revolut

Klarna and Revolut (Revolut Open Source) both appear on the Smoower Developer Ecosystem Index.

Klarna (rank #257) holds a modest lead over Revolut (rank #693) on the overall Smoower ecosystem score (47 vs 31). The gap of 16 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 Revolut. On education (docs, guides and learning material for developers), Klarna is clearly ahead of Revolut. On community (issue response, PR reviews and discussion health), Klarna is slightly ahead of Revolut. On reach (how visible the ecosystem is beyond its own repos), Klarna is clearly ahead of Revolut. On momentum (release cadence and how fast the ecosystem moves), Revolut is slightly ahead of Klarna.

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. Revolut shows 260 stars across 35 public repos, 5 active in the last 90 days and 1 external contributors. The star gap on its own does not decide the comparison, but Klarna's footprint is roughly 11.4x larger, which usually shows up in downstream signals like inbound issues and third party integrations.

Klarna is the stronger read for anyone weighting education. Revolut 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.