Head-to-head comparison
AssemblyAI vs Gladia
Two of the transcription tools podcasters reach for. Here's how they differ on pricing, features, audience, and the trade-offs that actually matter day-to-day.
Voice AI API that developers reach for when accuracy and uptime actually matter.
Best for: Developer transcription API
Multilingual Whisper-powered API with sub-300ms streaming.
Best for: Voice product developers
At a glance
The honest trade-offs
AssemblyAI
Pros
- High accuracy across 99 languages
- Strong real-time streaming model
- Generous startup program
Watch-outs
- Not a finished app — requires engineering
- Pricing adds up at scale
- Smaller community than Whisper
Gladia
Pros
- Sub-300ms real-time latency
- 100+ languages with code-switching
- Free 10 hours/month evaluation
Watch-outs
- API-only, no editor for end users
- Higher async rate than raw Whisper
- Volume tiers need annual commits
Which one should you pick?
Pick AssemblyAI if
You’re building around developer transcription api. AssemblyAI isn't an app — it's an API. If you're building a product that needs transcription, sentiment analysis, or speaker diarization at scale, it's one of the few options that pairs accuracy with reasonable pricing and serious infrastructure.
Pick Gladia if
You’re building around voice product developers. Gladia took Whisper and re-engineered it to work in production — sub-300ms streaming latency, code-switching across 100+ languages, diarization and translation in the same stream. For developers building voice products it's a serious Whisper-API upgrade.
Also worth comparing
Or see all AssemblyAI alternatives.
Frequently asked
What does AssemblyAI do better than Gladia?
AssemblyAI's standout is "High accuracy across 99 languages". Gladia doesn't make that promise — it leans into "Sub-300ms real-time latency" instead. If the first sentence describes your workflow, pick AssemblyAI; if the second does, pick Gladia.
What are the trade-offs?
AssemblyAI: not a finished app — requires engineering. Gladia: api-only, no editor for end users. Whether either matters depends entirely on what you actually need — neither is a deal-breaker by itself.
Can I use AssemblyAI and Gladia together?
Both are transcription tools so most teams pick one. Some workflows do combine them — for example, using AssemblyAI for one show or episode type and Gladia for another. Worth trying both free tiers before committing.