Grok Speech (STT + TTS APIs) vs Fireflies.ai
Which one should you pick? Here's the full breakdown.
Grok Speech (STT + TTS APIs)
xAI's standalone voice APIs -- launched 2026-04-17. Built on the stack that powers Grok Voice, Tesla vehicles, and Starlink customer support. $0.10/hr STT batch, $4.20 per 1M characters TTS, 25+ languages, word-level timestamps + speaker diarization
Fireflies.ai
AI meeting notetaker with 6,000+ integrations that records, transcribes, and summarizes your calls
| Category | Grok Speech (STT + TTS APIs) | Fireflies.ai |
|---|---|---|
| Ease of Use | 7.0 | 7.5 |
| Output Quality | 8.5 | 7.0 |
| Value | 9.0 | 7.5 |
| Features | 8.0 | 9.0 |
| Overall | 8.1 | 7.8 |
Pricing Comparison
| Feature | Grok Speech (STT + TTS APIs) | Fireflies.ai |
|---|---|---|
| Free Tier | No | Yes |
| Starting Price | $0.10 | $0 |
Which Should You Pick?
Pick Grok Speech (STT + TTS APIs) if...
- ✓Higher output quality (8.5 vs 7)
- ✓Better value for money (9/10)
Developers building voice agents, real-time transcription tools, accessibility features, or high-volume TTS workloads where the cost per hour of audio actually matters at scale. Strong fit for phone-call and meeting transcription use cases where xAI's published WER advantage (5.0% on phone-call entities vs. ElevenLabs 12.0%) compounds quickly.
Visit Grok Speech (STT + TTS APIs)Pick Fireflies.ai if...
- ✓More features (9 vs 8)
- ✓Has a free tier
Sales teams that need CRM-integrated call recording, remote teams that want searchable meeting archives, and managers who sit in too many meetings to take notes manually.
Visit Fireflies.aiOur Verdict
Grok Speech (STT + TTS APIs) and Fireflies.ai are extremely close overall. Your choice comes down to specific needs -- Grok Speech (STT + TTS APIs) is better for developers building voice agents, real-time transcription tools, accessibility features, or high-volume tts workloads where the cost per hour of audio actually matters at scale, while Fireflies.ai works best for sales teams that need crm-integrated call recording, remote teams that want searchable meeting archives, and managers who sit in too many meetings to take notes manually.