| Field | Speechify API | Groq |
|---|---|---|
| Type | Ongoing free tier · renewing-quota | Ongoing free tier · renewing-quota |
| What's free | 50,000 characters/month TTS (hard cap) + 60 min/month voice agents | Open-weight models (GPT-OSS, Qwen) plus Whisper, no credit card required |
| Rate limits | 3 concurrent calls; hard cap pauses at the limit (no overages) | Free plan examples: openai/gpt-oss-120b, openai/gpt-oss-20b and qwen/qwen3.8-27b: 30 RPM/1K RPD/8K TPM/200K TPD; Whisper models: 20 RPM/2K RPD/7.2K audio seconds/hour and 28.8K/day; limits vary by model |
| Expires | no expiry | no expiry |
| The catch | Commercial use is allowed on the free tier. No credit card required. Hard monthly cap that pauses at the limit. | Limits apply at the organization level, not per API key. Phone verification required at signup |
| Credit card | not required | not required |
| Phone verification | not required | required |
| Commercial use | allowed | allowed |
| OpenAI-compatible | no | yeshttps://api.groq.com/openai/v1 |
| Modalities | audio | text, audio |
| Free models (sample) | no sample | openai/gpt-oss-120b openai/gpt-oss-20b qwen/qwen3.8-27b whisper-large-v3 whisper-large-v3-turbo |
| Official docs | speechify.ai/pricing | console.groq.com/docs/rate-limits |
| Last verified | 2026-08-14 | 2026-10-08 |