# Emailio

**Canonical:** https://apis.io/providers/emailio/  
**Website:** https://www.emailio.com  
**APIs profiled:** 0

Emailio is a Y Combinator (Winter 2014) and Thiel Fellowship-backed startup building "email built for wellness" — a consumer email client for iPhone, iPad, and Mac that centers user wellbeing and mental health rather than traditional inbox-productivity metrics. Its pre-launch landing page describes inbox management, email batching, mood tracking, one-click unsubscribe, and Smart Rule Suggestions, with early access gated behind a waitlist. Founded by Martin Stoyanov and Teo Teodosiev with a roughly five-person team, Emailio sits at the intersection of the productivity and health & wellness categories. It was surfaced as a Y Combinator portfolio company and added to the API Evangelist network as a stub for enrichment; as of this pass it exposes a consumer product only — no public API, developer portal, documentation, or SDKs could be found.

## Kin Score — 6.0 / 100 (minimal)

Scored 2026-08-21 under rubric 0.12.0. Trend: flat (+0.0 from 6.0).

| Facet | Score |
|---|---|
| Discoverability | 50.0 |
| Contract Quality | 0.0 |
| Governance | 0.0 |
| Contract Governance | 0.0 |
| Operational Transparency | 0.0 |
| Developer Ergonomics | 0.0 |
| Commercial Clarity | 13.2 |
| Access Clarity | 13.2 |

Regulatory layer — **Health**: 7.5 (matched via tags).

## 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

Requires approval — onboarding: approval, pricing: unknown, trial: no (confidence: medium).

## Security (1)

- **Emailio Domain Security** — TLSv1.2

## Tags

Company, Email, Email Client, Productivity, Health and Wellness, Consumer, Y Combinator, Thiel Fellowship

---

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