Convex
Postmark
| Feature | Convex | Postmark |
|---|---|---|
| Pricing | Free / from $25/mo | From $15/mo |
| Free Plan | ✓ Yes | ✗ No |
| Rating | 4.5 / 5 | 4.6 / 5 |
| Best For | full-stack-developers, real-time-apps, startups, rapid-prototyping | developers, saas-companies, transactional-senders, agencies |
| Founded | 2021 | 2009 |
| Real Time Database | ✓ | ✗ |
| Serverless Functions | ✓ | ✗ |
| File Storage | ✓ | ✗ |
| Authentication | ✓ | ✗ |
| Scheduling | ✓ | ✗ |
| Vector Search | ✓ | ✗ |
| Transactional Email | ✗ | ✓ |
| Message Streams | ✗ | ✓ |
| Templates | ✗ | ✓ |
| Analytics | ✗ | ✓ |
| Webhooks | ✗ | ✓ |
| Inbound Email | ✗ | ✓ |
✓ 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
✓ Postmark Pros
- Fastest delivery times
- Excellent deliverability
- Clean simple API
- Great documentation
✗ Postmark Cons
- Not for bulk marketing email
- More expensive than SendGrid
- Limited template builder
The Verdict
Convex is built for full stack developers and real time apps, with a focus on real-time-database and serverless-functions. Postmark targets developers and saas companies and leads with transactional-email and message-streams.
On pricing, Postmark is the clear winner for budget-conscious users — starting at $15/mo compared to $25/mo for Convex. That $10/mo difference adds up quickly for growing teams.
Convex has a free plan, which gives it a meaningful edge for individuals and small teams exploring their options. Postmark requires a paid subscription from day one.
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.