Former Developer Relations · SpeechifyAI
Luke Oliff is a Developer Relations leader based in the UK. For the better part of a decade he has been working with voice technology, developer tooling, and open-source, improving developer experience for well known brands. He has architected open-source strategy, launched developer communities, built tools, and shipped conversational AI voice prototypes years before mainstream APIs were available. As an engineer at heart, he writes and speaks about voice AI, developer experience, and real-time APIs as a developer would, focussing on utility and experience. He led Developer Relations for SpeechifyAI Build in 2026 and wrote these articles during his time on the team.
There's now a command line for Speechify. Install it from npm, log in with your API key, and synthesize speech, browse voices, and hand Speechify to your AI agent, all from your terminal.
Luke Oliff
Speechify's official LiveKit plugin streams word-level timestamps alongside the audio. Read them by overriding transcription_node and you get word-synced captions in a Python voice agent — no extra API calls.
Luke Oliff
Add a listen button to documentation with the Speechify API. A framework-agnostic walkthrough with a concrete example you can copy.
Luke Oliff
What streaming text-to-speech makes possible: read-aloud, voice agents, call narration, live captions, and read-along highlighting, all built on the Speechify streaming endpoints.
Luke Oliff
Turn an RSS feed into a daily audio digest with the Speechify API. Fetch items, join the text, generate one audio file, and deliver it.
Luke Oliff
Build a Slack bot that reads channel messages aloud with the Speechify API. Wire events, synthesize audio, and post the clip back to the channel.
Luke Oliff
Give the Speechify text-to-speech API a URL and the page comes back as narrated audio. Fetch, extract the article text, chunk on sentence boundaries, synthesize each chunk with POST /v1/audio/speech.
Luke Oliff
The safeguards SpeechifyAI operates to prevent synthetic voices being used for election misinformation, and the commitments behind them.
Luke Oliff
What engineers actually use to add voice to web and mobile apps, and the four decisions that matter: the browser's built-in API versus a cloud one, streaming versus batch, where the key lives, and how to keep audio playing on iOS.
Luke Oliff
The tools for producing narration without hiring voice actors, compared on cost per finished hour rather than per seat. Studio subscriptions cap downloaded minutes; per-character APIs do not. One hour of audio runs from $0.31 to $40 depending on which you pick.
Luke Oliff
Which speech platform to pick when your chatbot has to talk. The decision is not voice quality, it is whether you need a TTS API or a full voice agent, plus how the model reads account numbers and order IDs back to a caller.
Luke Oliff
Generate the same script in English, German, Spanish, French, Italian, and Portuguese with the Speechify TTS API. Pick a simba-3.0 voice for each locale, call POST /v1/audio/speech per language, keep the key server-side.
Luke Oliff
The AI SDK ships generateSpeech() but no Speechify provider. So we wrote one: a dependency-free custom speech model that maps POST /v1/audio/speech onto the SDK's SpeechModelV4 interface, key held server-side in a Next.js route.
Luke Oliff
simba-3.2 is now the recommended Speechify TTS model, and GET /v1/audio/models lets you discover it at runtime instead of hardcoding a model list. What shipped, which voices it serves, and how to move off simba-3.0.
Luke Oliff
The 10 text to speech APIs worth evaluating in 2026, ranked on blind-listener scores from Artificial Analysis and priced per million characters.
Luke Oliff
Clone a voice from a browser upload, synthesize speech with it, and keep your API key server-side. A working Next.js voice cloning app built on the Speechify API, no GPU required.
Luke Oliff
Stream Speechify TTS as raw PCM, keep the API key server-side, and schedule each chunk into the browser's Web Audio API for low-latency playback.
Luke Oliff
Point Deepgram Voice Agent at the open-source tts-shims OpenAI-compatible proxy to speak with a Speechify voice. The shim answers Deepgram's open_ai TTS request and keeps your Speechify key server-side.
Luke Oliff
Use SSML emotion tags, pauses, prosody, emphasis, and pronunciation aliases to shape Speechify TTS output from one API request.
Luke Oliff
Simba 3.2 is evaluated on Artificial Analysis' independent TTS benchmark and on Voice Arena's blind, listener-voted board. Streaming under 100ms to first byte, from $6 per 1M characters, with production-grade quality.
Luke Oliff
Turn long-form ePub or Markdown into a single narrated chapter MP3 with a runnable Python demo: chunk on sentence boundaries, synthesize each chunk, stitch with ffmpeg.
Luke Oliff
Speechify is now a direct provider in speech-sdk. Switch existing calls over with a factory function and an API key, no new client required.
Luke Oliff
Clone a voice from a short sample and use it to narrate dynamic video content programmatically via the REST API.
Luke Oliff
Baseten published a case study on the SpeechifyAI voice agent stack. This is our view on why model co-location matters for live calls.
Luke Oliff
Use the Speechify API's word-level timestamps to generate accurate WebVTT captions for your synthesized audio.
Luke Oliff
How to stream audio from the Speechify TTS API in Python using the SDK and native requests. Covers chunked streaming to disk and piping audio to a player without waiting for the full payload.
Luke Oliff
A practical guide to synthesizing speech in Node.js using the Speechify TTS API. Covers installation, a basic synthesis call, streaming audio to disk, and what to reach for next.
Luke Oliff
A small, public repo of runnable Speechify recipes. Pick a folder, drop in your API key, run it. TypeScript and Python today, SDK and native REST side by side.
Luke Oliff
Welcome to the new Speechify developer blog. Expect updates from the AI and labs teams, product news, collaborations, and technical guides for the Speechify TTS API.
Luke Oliff