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Databases · head to head

Convex vs TIBCO Enterprise Message Service

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
Rated
-
Full reviewWebsite
TIBCO Enterprise Message Service logo

TIBCO Enterprise Message Service

Databases

JMS message broker underpinning bank and telecom estates, now maintained rather than expanded

From
On request
Rated
-
Full reviewWebsite

The short version

  • Only Convex has a free tier, so it costs nothing to try first.
  • Each has a real cost: 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.; TIBCO Enterprise Message Service the 2026 roadmap is oriented to modernising existing estates rather than winning new deployments, so a greenfield buyer is choosing a product its vendor is not investing in for growth.
  • They diverge on capability: Convex covers Reactive queries, TIBCO Enterprise Message Service covers JMS 2.0 broker.
  • Prices and features above were last checked on 31 August 2026.

Where they differ

Only the attributes on which Convex and TIBCO Enterprise Message Service actually diverge.

Attributes where Convex and TIBCO Enterprise Message Service differ
AttributeConvexTIBCO Enterprise Message Service
Starting priceFreeOn request
Pricing modelsubscriptionquote
Free tierYesNo
PlatformsWebLinux, Windows, Solaris, AIX, Docker

Identical on both: user rating (Not yet rated), category (Databases).

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 TIBCO Enterprise Message Service

  • JMS 2.0 broker
  • Fault tolerant pairs
  • Server routing
  • Rendezvous and FTL bridging
  • Kafka transport
  • Multiple client languages
  • FIPS 140-3 compliance
  • Central administration

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

TIBCO Enterprise Message Service

  • A bank with thousands of JMS applications deciding whether to renew maintenance or fund a migrationnot Convex
  • An organisation needing a JMS broker bridged to both TIBCO Rendezvous and Apache Kafka during a phased modernisationnot Convex
  • A telecom operator with fault-tolerant messaging requirements already standardised on the TIBCO stacknot Convex
  • A regulated deployment requiring FIPS 140-3 validated cryptography in the messaging layernot 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.

TIBCO Enterprise Message Service

  • The 2026 roadmap is oriented to modernising existing estates rather than winning new deployments, so a greenfield buyer is choosing a product its vendor is not investing in for growth.
  • Nothing is published on price, licensing is per server or per core, and renewal pricing across the Cloud Software Group portfolio has risen sharply since the 2022 Citrix and TIBCO combination.
  • It is a JMS broker, not a durable event log, so replay, stream reprocessing and long retention patterns require Kafka alongside it rather than instead of it.
  • Skills are concentrated in a contractor market that is ageing, and hiring engineers who want to work on EMS is materially harder than hiring for Kafka.
  • Deep integration with the rest of the TIBCO stack, particularly BusinessWorks, makes partial migration difficult; teams commonly find that leaving EMS means replacing several products at once.

Pricing, plan by plan

Convex

Free
  • Free & StarterFree
    • Supports 1-6 developers
    • Reactive database
    • File storage
  • Professional$25/month per developer
    • Supports up to 20 developers
    • All Starter features
    • Log streaming
  • Business & Enterprise$2500/month minimum
    • Supports 50+ developers
    • SAML/SSO
    • Service SLAs

TIBCO Enterprise Message Service

On request
  • TIBCO Enterprise Message Service$undefined/year
    • Licensed per server or per core with annual maintenance
    • No pricing published at any tier
    • Bundled in TIBCO Messaging and platform agreements

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 TIBCO Enterprise Message Service if

  • You need jms 2.0 broker.
  • You work on Linux, Windows, Solaris, AIX, Docker.
  • You also want fault tolerant pairs.
TIBCO Enterprise Message Service review

Questions people ask

Is Convex or TIBCO Enterprise Message Service better?
Neither clearly leads. Convex starts at Free and TIBCO Enterprise Message Service at On request, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Convex or TIBCO Enterprise Message Service?
Convex has a free tier; the other does not. Paid plans start at Free for Convex and On request for TIBCO Enterprise Message Service.
Does Convex or TIBCO Enterprise Message Service run on more platforms?
Convex runs on Web. TIBCO Enterprise Message Service runs on Linux, Windows, Solaris, AIX, Docker.
Can I use Convex for free?
Yes. Convex has a free tier, so you can try it without paying. TIBCO Enterprise Message Service starts at On request.
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 TIBCO Enterprise Message Service is typically brought in for.
What can Convex do that TIBCO Enterprise Message Service cannot?
Convex covers Reactive queries, TypeScript server functions, ACID transactions, Document database. TIBCO Enterprise Message Service covers JMS 2.0 broker, Fault tolerant pairs, Server routing, Rendezvous and FTL bridging.

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.

TIBCO Enterprise Message Service: Is TIBCO EMS still supported?

Yes, releases continue under Cloud Software Group, with 10.x versions shipping and FIPS 140-3 compliance added.

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.

TIBCO Enterprise Message Service: What does it cost?

Nothing is published. It is licensed per server or per core with annual maintenance, usually inside a wider TIBCO agreement.

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.

TIBCO Enterprise Message Service: Should a new project choose EMS?

Rarely. The vendor roadmap targets existing estates, and greenfield event-driven projects generally start with Kafka or a cloud broker.

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.

TIBCO Enterprise Message Service: Can EMS talk to Kafka?

Yes, an EMS transport for Apache Kafka is supported on Linux, which is the usual bridge during modernisation.

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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