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Databases · head to head

Convex vs RubyMine

Convex logo

Convex

Databases

Reactive backend combining a document database, TypeScript server functions and live queries, source-available under the Functional Source Licence.

From
Free
Free plan
Yes
Visit ConvexFull review
RubyMine logo

RubyMine

Developer Tools

JetBrains IDE for Ruby and Ruby on Rails development

From
$24/month
Free plan
No
Visit RubyMineFull review

The short version

  • Convex has a free plan, then $25/mo; RubyMine starts at $24/mo.
  • Only Convex lists reactive queries; only RubyMine lists rails-aware coding assistance.
  • Where RubyMine falls short: no permanently free tier for commercial use; requires an ongoing subscription.
  • Prices and features on this page were last checked on 13 November 2026.

Where they differ

Only the attributes on which Convex and RubyMine actually diverge.

Attributes where Convex and RubyMine differ
AttributeConvexRubyMine
Starting priceFree$24/month
Free tierYesNo
PlatformsWebWindows, macOS, Linux
CategoryDatabasesDeveloper Tools

Identical on both: pricing model (Subscription).

Not yet recorded: founded for Convex.

What each one covers

Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.

Only in Convex

  • Reactive queries
  • TypeScript server functions
  • ACID transactions
  • Document database
  • Scheduling and workflows
  • File storage
  • Text and vector search
  • End-to-end types

Only in RubyMine

  • Rails-aware coding assistance
  • Integrated debugger
  • Test runner integration
  • Database tools
  • Version control integration
  • Docker support

What people use each for

The jobs each tool is most often brought in to do.

Convex

  • Collaborative applications where several users see the same data and every client must reflect a change immediatelynot RubyMine
  • Agent backends that need durable state, scheduled work and transactional writes without assembling a queue, a database and a cachenot RubyMine
  • Small product teams who need a complete backend, including auth integration, file storage and subscriptions, without hiring infrastructure engineersnot RubyMine
  • Prototypes that must become production without a rewrite of the data layer, where end-to-end TypeScript types remove a class of integration bugsnot RubyMine

RubyMine

  • Building and maintaining Ruby on Rails applicationsnot Convex
  • Debugging Ruby web applicationsnot Convex
  • Running and managing RSpec or Minitest suitesnot Convex
  • Working across Ruby, JavaScript, and SQL in one projectnot Convex

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

Convex

  • The Functional Source Licence is not an OSI open source licence: competing use is prohibited until each release reaches its second anniversary and converts to Apache 2.0, so you may self-host but you may not build a service on it
  • Transactions are bounded at one second of user code, 16 MiB read and written, 32,000 documents scanned and 16,000 written, so every backfill, migration or bulk import has to be chunked into scheduled batches rather than written as a single operation
  • There is no SQL and no query planner; you declare up to 32 indexes per table and traverse them, and joins are loops in TypeScript, so an unanticipated access pattern requires a schema and index change rather than a new query
  • It is not an analytical database, so reporting means streaming data out to a warehouse and BI tools cannot be pointed at Convex directly, which adds a pipeline the architecture diagram did not originally include
  • The application is written against Convex's function and client APIs rather than a standard protocol, so leaving means rewriting the data access layer and replacing the reactivity model, not repointing a connection string

RubyMine

  • No permanently free tier for commercial use; requires an ongoing subscription
  • More resource-intensive than lightweight editors such as Sublime Text
  • Focused primarily on Ruby, so polyglot teams may prefer IntelliJ IDEA Ultimate with plugins instead
  • Startup time can be slower than simpler text editors on older hardware

Pricing, plan by plan

Convex

Free
  • Free & StarterFree
    • Supports 1-6 developers
    • Reactive database
    • File storage
  • Professional$25
    • Supports up to 20 developers
    • All Starter features
    • Log streaming
  • Business & Enterprise$2,500/month minimum
    • Supports 50+ developers
    • SAML/SSO
    • Service SLAs

RubyMine

$24/month
  • Individual$24/mo
    • Personal use license
    • Access to RubyMine
    • Free for students and open-source maintainers
  • Organization$34/mo
    • Business use license
    • Access to RubyMine
    • Volume and renewal discounts

Which should you pick?

Choose Convex if

  • You need reactive queries.
  • You want to start without paying.
  • You also want typescript server functions.
Convex review

Choose RubyMine if

  • You need rails-aware coding assistance.
  • You work on Windows, macOS, Linux.
  • You also want integrated debugger.
RubyMine review

Questions people ask

Is Convex or RubyMine better?
Neither clearly leads. Convex starts at Free and RubyMine at $24/month, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Convex or RubyMine?
Convex has a free tier; the other does not. Paid plans start at Free for Convex and $24/month for RubyMine.
Does Convex or RubyMine run on more platforms?
Convex runs on Web. RubyMine runs on Windows, macOS, Linux.
Can I use Convex for free?
Yes. Convex has a free tier, so you can try it without paying. RubyMine starts at $24/month.
What is Convex best used for?
Convex is most often used for collaborative applications where several users see the same data and every client must reflect a change immediately, agent backends that need durable state, scheduled work and transactional writes without assembling a queue, a database and a cache, small product teams who need a complete backend, including auth integration, file storage and subscriptions, without hiring infrastructure engineers, prototypes that must become production without a rewrite of the data layer, where end-to-end typescript types remove a class of integration bugs. Of those, collaborative applications where several users see the same data and every client must reflect a change immediately and agent backends that need durable state, scheduled work and transactional writes without assembling a queue, a database and a cache are not what RubyMine is typically brought in for.
What can Convex do that RubyMine cannot?
Convex covers Reactive queries, TypeScript server functions, ACID transactions, Document database. RubyMine covers Rails-aware coding assistance, Integrated debugger, Test runner integration, Database tools.

Answered from the vendors’ own pages

Convex: Is Convex open source?

It is source-available under FSL-1.1-Apache-2.0. You may read, modify and self-host it, but competing use is prohibited until each release converts to Apache 2.0 on its second anniversary.

RubyMine: How much does RubyMine cost?

RubyMine is sold as a JetBrains Toolbox subscription starting around $24/month for individuals and $34/month for organizations, with free licenses available for students and open-source maintainers.

Source
Convex: Can I self-host it?

Yes. The backend, dashboard and CLI can run on your own infrastructure, with most of the features of the cloud product. Self-hosted instances include a telemetry beacon that can be disabled.

RubyMine: Is there a free trial?

JetBrains provides a free trial period for RubyMine so developers can evaluate it before purchasing a subscription.

Source
Convex: Does it support SQL?

No. Data is accessed through a TypeScript query builder over declared indexes. Relationships are traversed in code, which is explicit and type-safe but means no ad hoc querying.

RubyMine: What platforms does RubyMine support?

RubyMine runs as a desktop application on Windows, macOS, and Linux via JetBrains Toolbox.

Source
Convex: What happens if a mutation exceeds the limits?

It fails rather than running longer, so bulk work must be split into batches and scheduled. The limits are per transaction: one second of user code, 16 MiB read and written, 32,000 documents scanned and 16,000 written.

Convex: How does reactivity actually work?

Queries are deterministic functions and Convex records the data each one read. When a mutation changes that data, affected queries are re-run and subscribed clients receive the new result, so cache invalidation is handled by the platform.

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