Affirm vs Grammarly

Affirm and Grammarly (Millions of users rely on Grammarly's AI-powered products to make their messages, documents, and social media posts clear, mistake-free, and impactful.) both appear on the Smoower Developer Ecosystem Index.

Affirm (rank #485) holds a narrow lead over Grammarly (rank #602) on the overall Smoower ecosystem score (38 vs 34). 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), Affirm is slightly ahead of Grammarly. On education (docs, guides and learning material for developers), Affirm is clearly ahead of Grammarly. On community (issue response, PR reviews and discussion health), Affirm is ahead of Grammarly. On momentum (release cadence and how fast the ecosystem moves), Grammarly is ahead of Affirm.

Affirm carries 207 GitHub stars across 116 public repos, with 9 repositories active in the last 90 days and 4 external contributors on record. Grammarly shows 4,355 stars across 23 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 Grammarly's footprint is roughly 21.0x larger, which usually shows up in downstream signals like inbound issues and third party integrations.

Affirm is the stronger read for anyone weighting education. Grammarly 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.