Soniox Text-to-Speech vs Unreal Speech
Both are developer TTS APIs competing on price and multilingual reach rather than celebrity voices. Soniox offers text-to-speech with voice cloning in 60+ languages, sold as part of its broader speech platform (which also does transcription), with usage-based pricing. Unreal Speech positions itself as a low-cost, high-quality TTS API for lifelike customizable voiceovers, marketed heavily on undercutting the big names on price per character. Choose Soniox if you want one vendor covering both speech-to-text and text-to-speech; choose Unreal Speech if you want a single-purpose, aggressively priced TTS API. No voice-quality winner is declared here.
| Decision point | Soniox Text-to-Speech | Unreal Speech |
|---|---|---|
| Best suited to | Developers building voice agents, narration and live conversations in 60+ languages | Streaming text-to-speech via API with word-level timestamp support. |
| Plans and cost | Official TTS page reviewed 2026-11-02: token-based pricing at $4.00 per 1M input text tokens and $21.50 per 1M output audio tokens, about $0.70 per hour of generated speech; pay only for what is used, with volume pricing and enterprise deployment on contact. | 首页观察、未独立核验、购买前请复核官网：the observed homepage states no plan prices. |
| Limitations | Usage-based pricing means total cost depends on volume; the $0.70/hour figure is an approximation from token rates, not a flat rate. | No prices are stated on the observed homepage; /stream caps at 1,000 characters per request. |
Use the same input
You need to add multilingual voiceovers to an app serving 5 languages. Compare both APIs' per-character pricing for your expected volume and test how each renders your product's proper nouns.
What a successful result must preserve
The API must support at least 5 languages, publish per-character or per-minute pricing, and allow custom or cloned voices for consistent branding.
Evidence and test status
Official specification comparison. Plan prices, feature lists and platform details below come from each vendor's official site and documentation, checked October 2026. We did not run a scored hands-on test; no quality or accuracy ranking is claimed.
- Soniox Text-to-Speech — Official homepage ↗ (reviewed 2026-11-02)
- Unreal Speech — Official Unreal Speech homepage and API samples ↗ (reviewed 2026-11-02)