Adyen vs MailerSend

Adyen and MailerSend (Email service that delivers) both appear on the Smoower Developer Ecosystem Index.

Adyen (rank #165) holds a modest lead over MailerSend (rank #401) on the overall Smoower ecosystem score (51 vs 41). The gap of 10 points reflects composite signals across code, docs, community and reach.

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

Adyen carries 2,684 GitHub stars across 65 public repos, with 49 repositories active in the last 90 days and 39 external contributors on record. MailerSend shows 499 stars across 22 public repos, 12 active in the last 90 days and 7 external contributors. The star gap on its own does not decide the comparison, but Adyen's footprint is roughly 5.4x larger, which usually shows up in downstream signals like inbound issues and third party integrations.

Adyen is the stronger read for anyone weighting code quality. MailerSend looks better where education 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.