YExclusive deal for YC founders

Make something people want.

Bluejay is built for teams shipping AI voice and chat agents. Test them with real-world simulations before launch, monitor every conversation in production, and improve them automatically.

Claim deal

“Bluejay's simulations test the edge cases we always run into, and its observability extracts data from human language in a way that just isn't possible otherwise. We can see how successful an agent is without weeks and weeks of testing.”

The Lendflow founding team

Lendflow · YC W21

Used by YC companies across batches

S13
W21
S22
S10
S25
W24
Brainbase Labs

What you get

Redeem before Demo Day and get an exclusive gift from the Bluejay team.

  • ✓$6,000 in credits for the current batch
    for 12 months.
  • ✓Dedicated Slack channel with
    our founders and engineers.
  • ✓Weekly check-ins with the people
    building Bluejay.
  • ✓The Bluejay Call Bell, engraved
    “Ring before you ship.”
  • ✓Direct access to the founders' phones
    on WhatsApp or text.

Our YC story

Some of the first teams to bet on Bluejay were YC companies. Founders mid-batch would show us agents they were shipping in weeks, not quarters, and every conversation ended the same way: it has to be reliable before it scales.

That bar shaped the product. Simulations that stress-test an agent before launch, observability that watches every production conversation, and a self-improvement loop that fixes what slips through. All of it exists because fast-moving teams demanded it.

This deal is our way of giving back to the community that pushed us hardest. If you're in the current batch: ship boldly, and ring the bell before you do.

— Faraz & Rohan, Co-founders of Bluejay

The Bluejay founders with Garry Tan at Y Combinator

Faraz Siddiqi, Garry Tan, and Rohan Vasishth at Y Combinator Demo Day

Ring before
you ship.

The Bluejay mascot leaning on the Y Combinator sign, surrounded by colorful topiary