Affirm vs Sage

Affirm and Sage both appear on the Smoower Developer Ecosystem Index.

Affirm (rank #485) holds a narrow lead over Sage (rank #625) on the overall Smoower ecosystem score (38 vs 33). 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), Sage is ahead of Affirm. On education (docs, guides and learning material for developers), Affirm is clearly ahead of Sage. On community (issue response, PR reviews and discussion health), Affirm is slightly ahead of Sage. On reach (how visible the ecosystem is beyond its own repos), Affirm is ahead of Sage. On momentum (release cadence and how fast the ecosystem moves), Affirm is slightly ahead of Sage.

Affirm carries 207 GitHub stars across 116 public repos, with 9 repositories active in the last 90 days and 4 external contributors on record. Sage shows 2,180 stars across 122 public repos, 6 active in the last 90 days and 22 external contributors. The star gap on its own does not decide the comparison, but Sage's footprint is roughly 10.5x larger, which usually shows up in downstream signals like inbound issues and third party integrations.

Affirm is the stronger read for anyone weighting education. Sage looks better where code quality 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.