Pillar Guide·6 min read
How to benchmark a transactional email API without cheating
A reproducible email API benchmark needs a fixed task, fresh workspaces, one send attempt, provider-native evidence, and honest blocked outcomes.
Topic Cluster · 3 articles
Email APIs
Transactional email API comparisons, test-mode semantics, and reproducible integration methods for coding agents.
Email APIs·5 min read
Mailgun vs SendGrid: similar job, different integration surface
Mailgun and SendGrid both send transactional email, but differ in authentication, payload shape, sender setup, test mode, and acceptance evidence.
Email APIs·5 min read
Resend vs Postmark: the important difference is how you test
Resend and Postmark both expose straightforward send APIs, but their test addresses, test tokens, sandbox servers, responses, and idempotency differ.