There are 6 startups in this thread. The initial order is random:

Kodex (YC S21) - Easy responses to government data requests - https://news.ycombinator.com/item?id=28156465

HeyCharge (YC S21) - Low-cost EV charging in multi-user buildings - https://news.ycombinator.com/item?id=28156463

Parallel Bio (YC S21) - Improving drug discovery by replacing animal models - https://news.ycombinator.com/item?id=28156464

Secoda (YC S21) - Company data discovery tool for teams - https://news.ycombinator.com/item?id=28156461

Oneistox (YC S21) - Skill-building, cohort-based courses for designers - https://news.ycombinator.com/item?id=28156462

Zeit Medical (YC S21) - Early detection of stroke - https://news.ycombinator.com/item?id=28156466