Is Convex free for database?

No — there's no free plan, but no monthly fee either: you pay for what you use (Free / Starter: database size $0.22 per GB, data transfer $0.132 per GB, document or row reads $2.2 per million reads, document or row writes $2.2 per million writes).

How much does Convex cost for database?

Free up to fixed limits, or pay as you go on Starter; Professional is $25 per developer per month with bigger allowances and lower rates on function calls, storage and egress. At list prices: database size 1 GB, data transfer 10 GB, document or row reads 1 million reads, document or row writes 200k writes: $1.74/month (Free / Starter); database size 8 GB, data transfer 50 GB, document or row reads 10 million reads, document or row writes 2 million writes: $29/month (Professional); database size 100 GB, data transfer 500 GB, document or row reads 100 million reads, document or row writes 20 million writes: $279/month (Professional).

Convex pricing

How Convex charges, what to know before you commit, and what you'd pay at your usage — next to what the alternatives would cost for the same thing.

How it charges

Checked 2026-10-03 on www.convex.dev ↗ · USD, list prices

In short

Free up to fixed limits, or pay as you go on Starter; Professional is $25 per developer per month with bigger allowances and lower rates on function calls, storage and egress.

Free plan: Yes
Cheapest paid plan: $25/mo
Side project: $1.74/mo Free / Starter
Growing: $29/mo Professional
Scaling: $279/mo Professional

What the model leaves out

Professional is $25 per developer per month (one developer shown). Convex bills function calls, not rows: the model counts each read as one query call and each write as one mutation call ($2.20 / $2 per million), and puts the whole included allowance (1M calls on Free/Starter, 25M on Professional) on reads, although Convex pools it across all calls. A query that reads many documents is still one call, so read-heavy apps cost less than shown. Egress is 1 GB / 50 GB included, then $0.132 / $0.12 per GB. There's no compute-hour price (query and mutation compute is free on these plans). Left out: database I/O (1 GB / 50 GB included, then $0.22 / $0.20 per GB), action compute (20 / 250 GB-hours, then $0.33 / $0.30 per GB-hour), file and search storage. Free stays free within its allowances; Starter is the same plan with pay-as-you-go overage enabled. US-region prices.

Before you commit

Professional is billed per developer on the team.
Explicit client calls, scheduled executions, subscription updates and file accesses all count as function calls.
Free has hard caps: once a limit is hit, new mutations may fail; Starter and Professional bill overage instead.
Prices are for US regions; other regions cost 1.3×.

Plan	Monthly fee	Database size	Data transfer per month	Document or row reads per month	Document or row writes per month
Free / Starter	None	0.5 GB includedthen $0.22 per GB	1 GB includedthen $0.132 per GB	1 million reads includedthen $2.2 per million reads	$2.2 per million writes
Professional	$25/mo	50 GB includedthen $0.2 per GB	50 GB includedthen $0.12 per GB	25 million reads includedthen $2 per million reads	$2 per million writes

What you'd pay

Database size8 GBData transfer per month50 GBDocument or row reads per month10 million readsfor per-operation pricingDocument or row writes per month2 million writesfor per-operation pricing

Usage only some alternatives charge for

Compute hours per month730 hours

Professional$25 plan + 2 million writes × $2 per million writes$29/mo

The same usage elsewhere

SupabasePro$25saves $4.00

FirebaseBlaze (pay as you go)$9.66saves $19

NeonLaunch$22saves $6.86

PlanetScalePostgres PS-5 (single node)$7.40saves $22

TursoDeveloper$5.99saves $23

MongoDBAtlas Dedicated M10$58+$29

Cost as you grow

Convex MongoDB Turso PlanetScale Neon Firebase Supabasex: database size (GB), other usage scaled with it; held at 730 hours (compute hours per month) — add more for a bigger app with the sliders above · cheapest usable plan at each point, list prices

All database pricing, compared →Which one fits your situation →