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: At $25/dev/month, Convex is priced aggressively against backend-as-a-service competitors like Firebase or Supabase, positioning itself as the developer-friendly, affordable alternative to rolling your own infra. The $2,500 enterprise floor signals they're not chasing SMBs at scale — they want serious engineering teams willing to pay for reliability. MongoDB Atlas: Atlas sits in the premium tier of managed databases, competing directly with AWS DocumentDB and Azure Cosmos DB, but leans on MongoDB's native compatibility as a differentiator over cloud-vendor lock-in alternatives. They're not the cheapest option — they're pitching developer experience and ecosystem depth to teams that want to avoid the friction of self-managing MongoDB.

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