# subjlab
> Paste your offer → scored subject-line pack

SubjectLab is an English-first micro-SaaS that turns a campaign brief into scored email subject variants (length + spam-risk heuristics) for A/B tests.

## Primary surfaces
- Studio tool at /
- How it works, use cases, integrations, security, pricing, FAQ, blog, feedback

## Honesty
Lab only — not an ESP. Scores are heuristics, not open-rate or inbox guarantees.


Canonical: https://subjlab.lxsaihub.com/
Hub: https://lxsaihub.com/
Contact: lixingliangsy@163.com