Convex
Deepgram
| Feature | Convex | Deepgram |
|---|---|---|
| Pricing | Free / from $25/mo | Free / from $0.0036/mo |
| Free Plan | ✓ Yes | ✓ Yes |
| Rating | 4.5 / 5 | 4.4 / 5 |
| Best For | full-stack-developers, real-time-apps, startups, rapid-prototyping | developers, contact-centers, voice-ai-apps, real-time-applications |
| Founded | 2021 | 2015 |
| Real Time Database | ✓ | ✗ |
| Serverless Functions | ✓ | ✗ |
| File Storage | ✓ | ✗ |
| Authentication | ✓ | ✗ |
| Scheduling | ✓ | ✗ |
| Vector Search | ✓ | ✗ |
| Speech To Text | ✗ | ✓ |
| Text To Speech | ✗ | ✓ |
| Real Time Streaming | ✗ | ✓ |
| Language Detection | ✗ | ✓ |
| Topic Detection | ✗ | ✓ |
| Custom Vocabulary | ✗ | ✓ |
| Smart Formatting | ✗ | ✓ |
✓ Convex Pros
- Real-time by default
- TypeScript-first
- Built-in auth and file storage
- Automatic caching
✗ Convex Cons
- Vendor lock-in
- Newer platform
- Limited to Convex runtime
✓ Deepgram Pros
- Extremely fast transcription (up to 40x real-time)
- Competitive accuracy with custom models
- Both STT and TTS in one platform
- Free $200 credit to start
✗ Deepgram Cons
- Developer-focused with no consumer app
- Custom model training requires enterprise plan
- Newer platform with less ecosystem maturity
The Verdict
Convex is built for full stack developers and real time apps, with a focus on real-time-database and serverless-functions. Deepgram targets developers and contact centers and leads with speech-to-text and text-to-speech.
On pricing, Deepgram is the clear winner for budget-conscious users — starting at $0.0036/mo compared to $25/mo for Convex. That $24.9964/mo difference adds up quickly for growing teams.
Both offer free plans, so you can test each with your real workflow before committing to a subscription.
Feature-wise, Deepgram offers broader built-in capabilities (7 features vs 6), while Convex takes a more focused approach — which can mean a simpler, faster onboarding experience.
This is a genuinely close comparison. If you can, sign up for both free trials (where available) and run a one-week test with your actual team tasks before deciding.