Reason Machines

Reason Machines builds Reason Agent, the autonomous software engineer…

3.0Score#352 of 999 agents#16 of 40 in Software engineer

Why it ranks #352

Reason Machines, an AI software engineer from YC Sp26, ranks #352 of 999 AI agents and #16 of 40 in Software engineer, with a score of 3.0 of 10. Data as of 3 Oct 2026.

The score adds four parts, each 0 to 10, by weight. Every point comes from public evidence. How scoring works ·

Proof 0 × 30% 0.0
Scale 1 × 30% 0.3
Momentum 6 × 25% 1.5
Autonomy 8 × 15% 1.2
= 3.0

Proof
Do customers use it? 30% of the score
0
No public claims of customers or revenue yet.
Not found: revenue or growth (+4), named customers (+3), a customer result (+2), a customer count (+2), work done at scale (+2)
Scale
Is there a real company behind it? 30% of the score
1
2 people.
- +1
  2 people on its YC page2 people
Not found: funding round in its news (+3)
Momentum
Is it shipping and growing now? 25% of the score
6
Shows a recent launch, hiring and a new batch.
- +3
  Launched in the last 6 monthsAra - The World's First Self-driving IDELaunch YC post · 1 Jun 2026
- +2
  Hiring: 1 open roleEngineering InternshipYC page
- +1
  New: YC Spring 2026
Not found: new traction claim in the last 6 months (+2), funding news in the last year (+2)
Autonomy
How much of the job does it do on its own? 15% of the score
8
Autonomous worker: completes whole tasks; people handle exceptions.
- +8
  Level 3 of 4: Autonomous workerCompletes whole tasks; people handle exceptions.
What the model read
- Acts in other systems: 93% likely
- Finishes whole tasks: 79% likely
- Calls itself an agent: 39% likely
Level 3: Completes whole tasks; people handle exceptions.

About Reason Machines

Reason Machines builds Reason Agent, the autonomous software engineer for engineering teams. Reason connects to GitHub, reproduces bugs, writes code, passes tests, and ships review-ready pull requests with recordings and logs across cloud environments.