Alloy

AI prototyping tool for product managers

4.9Score#77 of 999 agents#7 of 40 in Software engineer

Why it ranks #77

Alloy, an AI software engineer from YC W23, ranks #77 of 999 AI agents and #7 of 40 in Software engineer, with a score of 4.9 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 5 × 30% 1.5
Scale 4 × 30% 1.2
Momentum 5 × 25% 1.3
Autonomy 6 × 15% 0.9
= 4.9

Proof
Do customers use it? 30% of the score
5
Claims named customers and a customer count.
- +3
  Named customers
  “Early users like Rallied and are already using Cloud Agents to ship PM-built prototypes directly to production.”
  Launch YC post · 4 Aug 2026 · 3 claims
- +2
  A customer count
  “➤ 42% of the Forbes Cloud 100 \”
  Launch YC post · 29 Oct 2025
Not found: revenue or growth (+4), a customer result (+2), work done at scale (+2)
Scale
Is there a real company behind it? 30% of the score
4
5 people, raised $3.5M.
- +3
  5 people on its YC page5 to 9 people
- +1
  Largest of 2 rounds: $3.5M (Seed)Alloy (prev Index) lands $3.5m seed round from Blackbird and Bain Capital VenturesSource · 11 Feb 2025
Momentum
Is it shipping and growing now? 25% of the score
5
Shows a recent launch and a new claim.
- +3
  Launched in the last 6 monthsCloud Agents • AlloyLaunch YC post · 4 Aug 2026
- +2
  A new traction claim
  “Early users like Rallied and are already using Cloud Agents to ship PM-built prototypes directly to production.”
  Launch YC post · 4 Aug 2026
Not found: open roles on YC (+2), funding news in the last year (+2), a batch in the last year (it is YC Winter 2023) (+1)
Autonomy
How much of the job does it do on its own? 15% of the score
6
Supervised agent: takes actions in other systems; a person approves key steps.
- +6
  Level 2 of 4: Supervised agentTakes actions in other systems; a person approves key steps.
What the model read
- Acts in other systems: 81% likely
- Finishes whole tasks: 41% likely
- Calls itself an agent: 89% likely
Level 2: Takes actions in other systems; a person approves key steps.

About Alloy

Alloy is an AI prototyping tool for product managers. Clone any page of your live product with the Chrome extension to turn ideas, wireframes, and Figma designs into interactive, high-fidelity prototypes your team and customers understand. Alloy's Cloud Agent connects to your codebase and takes changes from prototype to production, and its AI chat can redesign any existing website. Design to code, no engineers required.