Convex vs MongoDB Atlas Pricing (2026)

Which one is cheaper?

MongoDB Atlas is the cheaper option, starting at $0/mo vs $25/mo for Convex.

Can I use either one for free?

Both offer free plans, so you can try each without paying. Start with whichever fits your workflow better and upgrade when you hit the limits.

How do they charge?

Different approach here. Convex uses hybrid pricing, while MongoDB Atlas goes with usage-based. That changes the math depending on your team size and usage.

Which one is a better deal?

Depends on what you need. Convex: Convex undercuts most backend-as-a-service and database platforms at the entry point — $25/seat is cheap for what's essentially a full reactive backend — but the $2,500/mo Enterprise floor signals they're not chasing bargain-hunting startups at scale. They're positioned to win indie devs and small teams early, then convert the ones that stick into higher-value accounts rather than nickel-and-diming growing teams seat by seat. MongoDB Atlas: MongoDB sits mid-to-premium in the database-as-a-service space — pricier than raw self-hosted Postgres or DynamoDB's pay-per-request model, but justified by the managed ops layer and document-model flexibility. They're clearly hunting teams who've outgrown free-tier NoSQL options and need something that won't fall over at scale.

Still deciding? See the best Convex alternatives or the best MongoDB Atlas alternatives, ranked with verified pricing.