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Databases · head to head

Convex vs WebStorm

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
WebStorm logo

WebStorm

Developer Tools

The JavaScript and TypeScript IDE

From
$12.9/month
Free plan
No
Visit WebStormFull review

The short version

  • WebStorm is a IDE for modern JavaScript development.
  • Convex has a free plan, then $25/mo; WebStorm starts at $12.9/mo.
  • Only Convex lists reactive queries; only WebStorm lists smart JavaScript editor.
  • Prices and features on this page were last checked on 13 November 2026.

Where they differ

Only the attributes on which Convex and WebStorm actually diverge.

Attributes where Convex and WebStorm differ
AttributeConvexWebStorm
Starting priceFree$12.9/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 WebStorm

  • Smart JavaScript editor
  • TypeScript support
  • Node.js development
  • Modern framework support
  • Built-in debugger
  • Unit testing
  • Version control
  • Live templates

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

WebStorm

  • Web application developmentnot Convex
  • React/Angular/Vue developmentnot Convex
  • Node.js backend developmentnot Convex
  • TypeScript projectsnot Convex
  • Frontend testingnot 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

WebStorm

  • JetBrains WebStorm is sold as an annual subscription rather than a one-time purchase: commercial price is $199 per year (USD), and personal price starts at $299 in year one, dropping to $239 in year two and $179 from year three onward with continuous renewal
  • If the subscription lapses, use of new versions stops; JetBrains grants a fallback license only for the last version used while the subscription was active, per its published buy page

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

WebStorm

$12.9/month
  • Individual$12.9/mo
    • Intelligent JavaScript & TypeScript editor
    • Debugging and testing
    • VCS integration
  • Organizations$25.9/mo
    • All Individual features
    • Commercial use license
    • Centralized license management

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 WebStorm if

  • You need smart javascript editor.
  • You work on Windows, macOS, Linux.
  • You also want typescript support.
WebStorm review

Questions people ask

Is Convex or WebStorm better?
Neither clearly leads. Convex starts at Free and WebStorm at $12.9/month, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Convex or WebStorm?
Convex has a free tier; the other does not. Paid plans start at Free for Convex and $12.9/month for WebStorm.
Does Convex or WebStorm run on more platforms?
Convex runs on Web. WebStorm runs on Windows, macOS, Linux.
Can I use Convex for free?
Yes. Convex has a free tier, so you can try it without paying. WebStorm starts at $12.9/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 WebStorm is typically brought in for.
What can Convex do that WebStorm cannot?
Convex covers Reactive queries, TypeScript server functions, ACID transactions, Document database. WebStorm covers Smart JavaScript editor, TypeScript support, Node.js development, Modern framework support.

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.

WebStorm: Is there a free version of WebStorm?

Yes, WebStorm is free for non-commercial use and includes access to JetBrains AI with a free tier.

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.

WebStorm: What is the cost of a commercial WebStorm license?

The page references a testimonial mentioning 70 euros as a cost, though specific current pricing requires visiting the dedicated pricing page.

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.

WebStorm: How does JetBrains AI licensing work?

Users can pay with JetBrains AI credits, bring their own AI subscriptions and API keys to avoid vendor lock-in, or use the free tier included with WebStorm.

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.

WebStorm: What features does the free tier include?

The free tier includes the smart code editor, navigation tools, integrated developer tools, and customization options.

Source
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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