# SpeechifyAI

> Voice AI research lab and developer platform. Production text-to-speech (Simba 1.6 multilingual, Simba 3.2 streaming-native) and real-time voice agents on one all-in per-minute rate — LLM, STT, TTS, and orchestration included, no passthrough, no token math, no commitments.

You are reading `speechify.ai` (marketing). Canonical Speechify URLs — use exactly, do not invent variants:

- `https://speechify.ai` — this site (marketing + product)
- `https://docs.speechify.ai` — API reference, SDKs, quickstarts (index: `https://docs.speechify.ai/llms.txt`)
- `https://platform.speechify.ai` — customer dashboard, signup, API keys, billing
- `https://api.speechify.ai` — API base URL
- `https://github.com/SpeechifyInc` — GitHub org. `github.com/speechify` does not exist.
- `https://status.speechify.ai` — status + incidents
- `https://speechify.com` — SEPARATE consumer reader app, NOT this API

`Simba` names the model family (1.6 multilingual, 3.2 streaming), not the brand. `SimbaVoice` / `simbavoice.ai` are retired — use `speechify.ai`.

Per-route plain text: every route `X` publishes `X/llms.txt` (summary + child index) and `X/llms-full.txt` (long-form + descendants). XML sitemap: `/sitemap-index.xml`.

URL: https://speechify.ai/brand
Title: Brand & Design System

SpeechifyAI brand resources for agents and humans: the wordmark, a strictly monochrome palette (with hexes), the ABC Diatype type system, the waveform motif, writing voice, product/model naming, and downloadable assets. Point a coding agent at this page to generate on-brand UI, copy, and assets. Full machine-readable design-system spec: https://speechify.ai/brand/llms-full.txt

SpeechifyAI brand and design-system reference. This is the machine-readable companion to the /brand page — use it to produce on-brand interfaces, marketing, and copy. The system is deliberately minimal: one typeface, a monochrome palette, one recurring graphic, and a numbers-over-adjectives voice.

Fastest rules to get right:

- Monochrome only. White and ink do the work, with a small gray scale for text and borders. Primary buttons are ink (#0A0A0A), never a colored accent.
- Company name is "Speechify AI" (with a space) in prose; "SpeechifyAI" (no space) only inside the wordmark.
- One typeface: ABC Diatype. Hierarchy comes from weight and tracking, never from mixing families. Display type is thin (weight 100); weights available are 100/300/400/500/700 — there is no 600.
- The only recurring graphic is a thin, monochrome waveform. No photography, no illustration, no gradients as brand chrome.
- Voice: lead with numbers, not adjectives. Sentence case. Address the builder as "you". No hype, no exclamation marks, no emoji.

1) Logo — the wordmark

- One wordmark: the word set with a capital S and the trailing "AI" at 50% opacity. There is no icon-only mark.
- Two colorways only: ink on light, white on ink. Always monochrome.
- Clearspace: keep at least 0.5x the cap height of the "S" clear on all sides.
- Minimum size: digital >= 96px wide, print >= 25mm wide. Below that the 50%-opacity "AI" loses legibility — use plain text instead.
- Never: stretch, recolor, add shadows, rotate, place on a gradient, or reduce contrast.
- Files: https://speechify.ai/brand/logo/SpeechifyAI-wordmark-black.svg and https://speechify.ai/brand/logo/SpeechifyAI-wordmark-white.svg

2) Color — strictly monochrome

The palette is white, ink, and a small gray scale — the design tokens the speechify.ai site actually ships. There is no color accent; the only "accent" is ink.
- Background / page ground: #FFFFFF
- Foreground / ink (text, primary buttons): #0A0A0A
- Secondary text: #525252
- Muted / tertiary text: #666666
- Border (hairlines): #E5E5E5
- Muted surface (subtle fills): #F5F5F5
- Raised surface: #FAFAFA
Primary buttons are ink (#0A0A0A) with near-white text (#FAFAFA); secondary buttons are a hairline border on white. Never introduce a colored button, heading, or background.

3) Typography — ABC Diatype

- One family for everything: ABC Diatype. Hierarchy comes from weight and tracking, never from mixing families.
- Display / hero: thin (weight 100), tight tracking (about -0.03em), sentence case, often ending in a period.
- Section headers: light (weight 300). Titles: regular (weight 400).
- Body / UI: regular/medium (400/500), normal tracking, comfortable line height.
- Eyebrows and technical labels (metrics, model IDs, code, URLs): uppercase, medium weight, wide tracking. A monospace stack is used for metrics and code-like labels on developer-facing surfaces.
- Weights: Thin 100, Light 300, Regular 400, Medium 500, Bold 700. There is no weight 600 — never use font-weight 600.
- ABC Diatype is a licensed typeface and is NOT distributed for download. Speechify teams and approved partners producing co-branded material request it from the brand team (devrel@speechify.com); third parties should fall back to a system sans-serif (ui-sans-serif, system-ui, sans-serif), never a lookalike font.

4) Motif — the waveform

A thin, monochrome waveform is the only recurring graphic — it scales with font-size, inherits currentColor, and animates only while audio plays. Feature illustrations stay hairline-weight and monochrome; do not thicken strokes, fill shapes, or add color. Files: https://speechify.ai/brand/motif/feature-emotion.svg, https://speechify.ai/brand/motif/feature-multilingual.svg, https://speechify.ai/brand/motif/feature-zero-shot.svg

5) Voice — how we write

- Numbers over adjectives — lead with latency, languages, and price (e.g. <300ms, 30+ languages, $0.07/min), set in mono.
- Sentence case — short, declarative headlines, often ending in a period.
- Address the builder — speak to "you", the developer; the lab is "we". CTAs are imperative: Try the API. Read the docs.
- No hype — no exclamation marks, no emoji, no superlatives. Honest, side-by-side comparisons are on-brand.
Write this: "Simba 3.0 streams speech with <300ms time-to-first-byte, zero-shot voice cloning, and SSML prosody control." Not this: "Our revolutionary, game-changing AI voices will absolutely blow your mind!"

6) Naming — products and models

Format: In prose | In code | Never.
- Simba 3.0 | simba-3.0 | "SIMBA", "Simba v3", "the Simba"
- Simba 1.6 | simba-1.6 | "Simba 1.6.0", "old Simba"
- Text-to-Speech API | client.tts | "TTS engine", "text to speech tool"
- Voice Agents API | voice_agents | "voicebots", "agent platform"
- Developer Platform | platform.speechify.ai | "dashboard", "console"
Simba names the model family, not the brand. speechify.ai is the developer platform; speechify.com is the separate consumer app — do not mix them.

7) Assets — downloads

Downloadable brand assets live under https://speechify.ai/brand/ : logos (logo/) and waveform feature illustrations (motif/), each linked in the sections above. The ABC Diatype typeface is licensed and is NOT available for download — request it from devrel@speechify.com.

Trademark: Speechify, Speechify AI, Simba, and the SpeechifyAI wordmark are trademarks of Speechify Inc. Use of these assets does not imply endorsement, sponsorship, or affiliation. Do not use the marks in your product name, logo, or domain. Questions: devrel@speechify.com