Convex
Reactive backend hosting a document database with ACID transactions, serverless functions, and websockets for live updates.
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Convex scores 3.9/10 for free value in Apps. The main constraint: Free & Starter: reactive database, file/text/vector search, crons, auth, Node.js actions, up to 40 deployments (1M function calls/month).
Free value score
3.9 / 10Show the math
Key metrics
What you get
Reactive DB with serverless functions and websockets
Vector and text search included on free tier
ACID transactions on documents with relationships
Preview deployments included free
Gotchas
- 1M function calls/month
Free plan includes 1 million function calls per month; additional calls are billed at $2.20/million on the Starter pay-as-you-go tier.
- 0.5 GB database storage
Free plan caps total database storage at 0.5 GB; going beyond requires upgrading to Starter pay-as-you-go at $0.22/GB.
- 1 GB file storage
Free plan includes 1 GB of file storage in total; additional file storage is available at $0.033/GB on Starter.
- 0.5 GB search storage
Full-text and vector search storage is capped at 0.5 GB on the free plan.
- 20 GB-hours action compute/month
Node.js action compute is limited to 20 GB-hours per month; overages are charged at $0.33/GB-hour on Starter.
- 1 GB database I/O/month
Database read/write I/O is capped at 1 GB per month on the free plan.
- 1 GB data egress/month
Network egress is limited to 1 GB per month on the free plan; additional is $0.132/GB.
- 40 deployment limit
The free plan supports a maximum of 40 deployments (preview + production); Professional allows 300.
- 16 concurrent queries (S16 class)
Free deployments run in the S16 class, allowing only 16 concurrent queries and 64 concurrent actions versus 256/512 on Professional.
- 1,000 concurrent sessions
The free plan caps simultaneous WebSocket/reactive sessions at 1,000 per deployment; Professional allows 10,000.
- No daily backups
Daily automated backups are unavailable on the free plan; they require at least the Professional plan.
- No log/exception streaming
Log streaming and exception reporting integrations (e.g. Datadog, Sentry) are gated to paid plans.
- No custom domains
Custom domains are unavailable on the free plan; apps are served under a convex.site subdomain.
- No streaming data exports
Real-time CDC / streaming export to external data warehouses requires Professional or higher.
- No email/Slack support
The free plan has no dedicated support channel; users rely on community Discord.
- 3,000 search query-GBs/month
Full-text and vector search queries are capped at 3,000 query-GBs per month on the free plan.
Sources
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"Function calls per million | 1M/month $2.20 per 1M"
https://www.convex.dev/pricing -
"Database storage per GB/month | 0.5 GB total $0.22 per GB/mo ... File storage per GB/month | 1 GB total $0.033 per GB/mo ... Search storage per GB/month | 0.5 GB total $0.55 per GB/mo"
https://www.convex.dev/pricing -
"Deployment limit | 40 ... Deployment class | S16 ... Concurrent sessions | 1,000 ... Concurrent queries | 16 ... Concurrent actions | 64"
https://www.convex.dev/pricing -
"We're very excited to announce Convex's $26M series A financing led by Andreessen Horowitz. General Partner Martin Casado is joining the Convex board."
https://news.convex.dev/series-a/
