Which do YC companies use?

Historically Clerky, though Atlas is now common. Either is accepted.

Yes — the entity is the same, only the workflow tool differs.

Stripe Atlas vs Clerky: Which to Use for Delaware C-Corp

Compare Stripe Atlas and Clerky for Delaware C-Corp incorporation — cost, speed, ongoing support, and fundraise readiness.

Both create clean Delaware C-Corps ready for VC money. The right choice depends on where you are in your journey and how much handholding you want.

$500 flat, includes Stripe account, banking, and post-incorp templates. Best for first-time founders who want everything bundled.

More granular control over stock issuance, SAFEs, and 83(b) filings. Preferred by YC-track founders and repeat founders.

Both produce a fundraise-ready C-Corp. Atlas is faster to start. Clerky is more flexible as complexity grows.

Which do YC companies use?: Historically Clerky, though Atlas is now common. Either is accepted.
Can I switch later?: Yes — the entity is the same, only the workflow tool differs.