Amplitude vs TaxJar

Amplitude and TaxJar (Making sales tax filing easier for more than 20,000 online sellers and merchants across the world.) both appear on the Smoower Developer Ecosystem Index.

Amplitude (rank #93) holds a meaningful lead over TaxJar (rank #693) on the overall Smoower ecosystem score (56 vs 31). The gap of 25 points reflects composite signals across code, docs, community and reach.

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

Amplitude carries 3,167 GitHub stars across 151 public repos, with 39 repositories active in the last 90 days and 23 external contributors on record. TaxJar shows 490 stars across 39 public repos, 1 active in the last 90 days and 3 external contributors. The star gap on its own does not decide the comparison, but Amplitude's footprint is roughly 6.5x larger, which usually shows up in downstream signals like inbound issues and third party integrations.

Amplitude is the stronger read for anyone weighting momentum. TaxJar 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.