{
  "schema": 1,
  "locale": "en",
  "id": "heygen-voice-turbo-free-api",
  "name": "HeyGen Voice Turbo text-to-speech API free for a limited time ($0 per million characters, no credit card)",
  "vendor": "HeyGen",
  "tier": "fish",
  "region": "overseas",
  "offerType": "promo",
  "goals": [
    "api",
    "audio"
  ],
  "modelTags": [
    "other"
  ],
  "models": [
    "HeyGen Voice Turbo (heygen-voice-1-turbo-free)"
  ],
  "quota": "Until 2026-11-30, the Voice Turbo Free tier of the HeyGen text-to-speech API costs 0 USD per million characters with no credit card; set model to heygen-voice-1-turbo-free in the request and use the public instant voices",
  "validity": "limited",
  "deadline": "2026-11-30",
  "trend": null,
  "addedDate": "2026-10-24",
  "lastVerified": "2026-10-24",
  "editorPick": false,
  "difficulty": "easy",
  "hasRef": false,
  "url": "https://lanmao.ai/go/heygen-voice-turbo-free-api",
  "valueUsdMonthly": null,
  "valueUsdOnce": null,
  "inviteeBonusUsd": null,
  "quotaDetail": "Official HeyGen blog \"HeyGen Voice Turbo Is Free for Developers\": \"Free until November 30, 2026. $0 per million characters. No credit card. One-line switch.\" Example call: POST https://api.heygen.com/v3/models/audio/tts with the X-Api-Key header and model set to heygen-voice-1-turbo-free in the body. Comparison table on the page: Turbo Free is \"$0 until Nov 30\", speed \"Best effort\", voices \"Public and instant\", best for \"Prototypes and testing\"; paid Turbo is 4 USD per million characters (fast, priority) and HeyGen Voice is 15 USD per million characters (including professionally trained voices). The page says Turbo and HeyGen Voice rank 1st and 2nd on the Artificial Analysis text-to-speech leaderboard (controlled voices, as of 2026-10-20).",
  "threshold": [
    "email"
  ],
  "notes": "The free tier is a limited-time promotion that ends on 2026-11-30, after which the paid Turbo price of 4 USD per million characters applies; whether it is extended is up to the official page. Free-tier speed is best effort with no priority, so it suits prototypes and testing rather than high-concurrency production. Only public instant voices are available, not your own professionally trained voices. The page promises a free API key and no credit card, but the sign-up flow (corporate email requirement, regional limits, whether a HeyGen account is needed first) was not checked, and the exact rate limits in the official docs were not retrieved. This entry covers the API; it is a separate allowance from the HeyGen web free plan (heygen-free-plan) already on the site.",
  "sourceUrl": "https://www.heygen.com/blog/heygen-voice-turbo",
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  "citation": "Source: lanmao.ai, verified 2026-10-24, https://lanmao.ai/o/heygen-voice-turbo-free-api/"
}