SpeechifyAI

SpeechifyAI is Speechify's developer platform for adding generated speech and conversational voice experiences to applications. Its Build API covers text-to-speech, streaming, SSML, emotion control, speech marks, and voice cloning, while SpeechifyAI Agents provides a managed runtime for realtime voice agents.

Key Highlights

• One API key works across speech generation, voices, and agent endpoints.
• The free plan includes 50,000 text-to-speech characters and 60 voice-agent minutes each month.
• Official Python and TypeScript SDKs are available alongside REST endpoints.
• Developers can start with built-in voices or create a cloned voice from a short audio sample.

What Makes It Different

SpeechifyAI is separate from the consumer Speechify reader. It exposes the voice technology as developer building blocks instead of focusing on reading documents aloud. The same platform combines streaming speech, voice cloning, and full voice agents, so teams can use one account and billing model instead of assembling separate text-to-speech, agent, and orchestration services.

Features & Capabilities

The Build API generates audio from text and supports streaming playback, SSML controls, emotional delivery, multilingual synthesis, and word-level speech marks. Voice cloning creates a reusable voice ID from a 10 to 30 second reference recording. SpeechifyAI Agents adds function calling, knowledge bases, conversation memory, inbound and outbound telephony, webhooks, testing, and an embeddable web component. These capabilities suit product narration, accessibility features, support lines, appointment booking, and other interactive voice workflows.

User Ratings and Testimonials

SpeechifyAI is primarily a developer service, so technical fit is better evaluated with a prototype than with consumer reader reviews. Teams can test latency, pronunciation, emotional range, streaming behavior, and agent tool calls against their own scripts and call flows before choosing a paid plan.

Pricing & Value

• Free: $0 per month with 50,000 text-to-speech characters, 60 voice-agent minutes, and three concurrent calls.
• Starter: $10 per month with 1 million characters, 120 agent minutes, voice cloning, streaming, and SSML.
• Pro: $99 per month with 3 million characters, 1,200 agent minutes, knowledge bases, tool calling, and priority support.
• Scale: $499 per month with 10 million characters, 6,000 agent minutes, higher concurrency, and dedicated support.

Paid usage beyond the included allowances is metered by characters for text-to-speech and by conversation minutes for voice agents. Enterprise pricing is available for custom volume, compliance, and support requirements.