# Polymorph

**Canonical:** https://apis.io/providers/polymorph/  
**Website:** https://usepolymorph.com/  
**APIs profiled:** 0

Polymorph is a Y Combinator (Winter 2026) startup building adaptive consumer internet infrastructure that personalizes user experiences with AI agents. Founded in San Francisco by Andrew Sy, the platform runs thousands of continuous product and lifecycle-engagement experiments for its customers, each carrying the craft of that product's direction and brand, so consumer teams can scale experimentation in product surfaces without being bottlenecked by headcount or design capacity. Its stated vision is to make the consumer internet polymorphic — one that adapts to each user and optimizes for delightful experiences. As of this profile the company operates a marketing site only; it publishes no public API, developer documentation, SDKs, or developer portal.

## Kin Score — 11.5 / 100 (emerging)

Scored 2026-08-20 under rubric 0.12.0. Trend: flat (+0.0 from 11.5).

| Facet | Score |
|---|---|
| Discoverability | 50.0 |
| Contract Quality | 0.0 |
| Governance | 0.0 |
| Contract Governance | 0.0 |
| Operational Transparency | 10.5 |
| Developer Ergonomics | 4.8 |
| Commercial Clarity | 21.1 |
| Access Clarity | 21.1 |

## Agent readiness — 0.0 (human-only)

| Dimension | Value |
|---|---|
| Spec Presence | no |
| Agentic Access | no |
| Reversibility Documented | no |
| MCP Server | no |
| Auth Clarity | no |
| Idempotency | no |
| Error Semantics | no |
| OpenAPI Examples | no |
| Rate Limit Signal | no |
| Event Surface Described | no |
| Agent Skills | no |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | no |

## Access

Unknown — onboarding: unknown, pricing: unknown, trial: no (confidence: low).

## Security (2)

- **Polymorph Domain Security** — TLSv1.3 · HSTS · DNSSEC · DMARC
- **Polymorph Vulnerability Disclosure** — Hackerone · contact published

## Tags

Company, Personalization, Experimentation, Consumer Internet, Artificial Intelligence, Machine-Learning, Growth, Y Combinator

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/polymorph/). Scores are computed from the provider's own public artifacts under a published rubric.