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Comparison · Analytics
ThingsBoard vs Cortex
A side-by-side editorial comparison of ThingsBoard and Cortex — release velocity, themes, recent moves, and the top alternatives to consider.
ThingsBoard vs Cortex: at a glance
What is ThingsBoard?
An IoT platform whose release notes have become a CVE ledger
ThingsBoard ships every release twice — once on the 4.3 line and once as a 4.2 backport with an identical security section — and those security sections now dominate the notes, running to twenty or thirty CVEs per release. The recurring classes are telling: SSRF through AI model provider URLs, SSRF and file access escapes from the TBEL script sandbox, DNS rebinding bypasses, and access control on alarm comments. Feature work continues underneath, mostly IoT Hub integration and an Angular 20 UI migration.
What is Cortex?
Cortex is betting on Parquet block storage and graduating years of experimental features.
Cortex publishes its release notes as release candidates, and the two majors visible here tell a consistent story. 1.20 introduced Parquet-based block storage, Prometheus Remote Write 2.0, a resource-based limiter for ingesters and store-gateways, and regex tenant resolution, all experimental. 1.21 then made Parquet a Store Gateway query mode, graduated the Ruler API, Alertmanager API and sharding, tenant federation, FIFO/Redis cache and memcached service discovery out of experimental, and enabled the bucket index by default. The 1.21.1 candidate is almost entirely security hardening.
ThingsBoard vs Cortex: editorial side-by-side
ThingsBoard
0.0ANALYTICS
An IoT platform whose release notes have become a CVE ledger
◆ Current state
ThingsBoard ships every release twice — once on the 4.3 line and once as a 4.2 backport with an identical security section — and those security sections now dominate the notes, running to twenty or thirty CVEs per release. The recurring classes are telling: SSRF through AI model provider URLs, SSRF and file access escapes from the TBEL script sandbox, DNS rebinding bypasses, and access control on alarm comments. Feature work continues underneath, mostly IoT Hub integration and an Angular 20 UI migration.
◆ Where it's heading
The platform is paying down the security cost of being extensible. TBEL scripting and user-configurable AI model endpoints are exactly the features that make ThingsBoard useful for industrial rule engines, and both are repeatedly the source of sandbox and SSRF findings — so the work has shifted to fencing them with allow-lists, opt-in SSRF protection and configurable security headers. Meanwhile the AI surface keeps growing, with structured output support spreading across more model providers.
◆ Prediction
The dual-branch pattern will hold, with 4.2 continuing to receive the same security sets as 4.3 until it reaches end of life; expect further hardening of the TBEL sandbox rather than new scripting capability.
Cortex
0.0ANALYTICS
Cortex is betting on Parquet block storage and graduating years of experimental features.
◆ Current state
Cortex publishes its release notes as release candidates, and the two majors visible here tell a consistent story. 1.20 introduced Parquet-based block storage, Prometheus Remote Write 2.0, a resource-based limiter for ingesters and store-gateways, and regex tenant resolution, all experimental. 1.21 then made Parquet a Store Gateway query mode, graduated the Ruler API, Alertmanager API and sharding, tenant federation, FIFO/Redis cache and memcached service discovery out of experimental, and enabled the bucket index by default. The 1.21.1 candidate is almost entirely security hardening.
◆ Where it's heading
Two arcs run in parallel. The storage arc is moving Cortex off pure TSDB blocks toward Parquet, first as a converter and format, then as a queryable Store Gateway mode — the same columnar direction the rest of the observability market has taken for long-retention data. The maturity arc is a deliberate clearing of the experimental backlog, with six subsystems graduating in one release and their flags renamed to drop the experimental prefix. Layered on both is a distinct hardening push: the latest candidate bounds gossip connections, caps decompressed request bodies, adds HMAC stream authentication and validates tenant IDs against the authenticated caller.
◆ Prediction
Expect Parquet to keep progressing from experimental toward default, following the path the bucket index just completed. The security work in 1.21.1 reads like a systematic pass over untrusted input paths rather than a response to a single report, so more of the same in the ingestion and gossip layers is likely.
Alternatives to ThingsBoard and Cortex
Other Analytics products tracked by Sparkpulse, ranked by recent ship velocity. Each card links to a full editorial trajectory and lets you pivot into a head-to-head comparison with either ThingsBoard or Cortex.
Apache Drill
A SQL-on-anything engine shipping rarely, but each release widens what it can reach
Apache Superset
Superset's tracked feed is a Helm chart tag stream with no notes attached.
ApexCharts
Three releases in three weeks moved ApexCharts from free library to gated open-core.
Graphite
Graphite's answer to its own CVE backlog is a pre-release nobody calls official.
NetObserv
NetObserv is layering TLS visibility and health alerting on top of its eBPF flow pipeline.
See all ThingsBoard alternatives → · See all Cortex alternatives →
Recent activity from ThingsBoard and Cortex
Latest ship moves from both products, interleaved chronologically. ⚡ = editorial spark.
- 1mo agoThingsBoard4.3.1.3 clears 25+ CVEs and adds IoT Hub integration
- 1mo agoThingsBoard4.2.2.3 backports the full 4.3.1.3 security set
- 2mo agoCortex1.21.1 candidate hardens gossip, ingestion and status pages
- 2mo agoThingsBoard4.3.1.2 fences the TBEL sandbox and AI provider URLs against SSRF
- 2mo agoThingsBoard4.2.2.2 backports the TBEL sandbox and SSRF fixes
- 3mo agoCortex1.21.0-rc.1 fixes memberlist, tenant federation and a memory leak
- 4mo agoThingsBoard4.3.1.1 adds configurable security headers and a rebinding allow-list
- 4mo agoThingsBoard4.2.2.1 backports security headers and CORS configuration
- 4mo agoCortexParquet becomes a Store Gateway mode as six features graduate ⚡
- 9mo agoCortex1.20.0-rc.1 fixes metric name validation and a compactor race
- 9mo agoCortexCortex 1.20 introduces Parquet storage and Remote Write 2.0 ⚡
Frequently asked questions
What is the difference between ThingsBoard and Cortex?
They serve adjacent needs but don't currently overlap on shipped themes. ThingsBoard and Cortex are shipping at a similar cadence (velocity 0.0 vs 0.0, both within Sparkpulse's "active" band). See the at-a-glance table above for a side-by-side breakdown of velocity, recent sparks, and editorial themes.
Is ThingsBoard better than Cortex?
Sparkpulse doesn't pick a winner — we score release velocity, not feature parity. ThingsBoard and Cortex are shipping at a similar cadence (velocity 0.0 vs 0.0, both within Sparkpulse's "active" band). For your specific use case, the alternatives sections above list other Analytics products to evaluate alongside.
What are the best alternatives to ThingsBoard?
Top ThingsBoard alternatives in Analytics are ranked by recent ship velocity. Browse the "ThingsBoard alternatives" section above for the current picks, or visit /alternatives/thingsboard for the full list with editorial commentary on each.
What are the best alternatives to Cortex?
Top Cortex alternatives in Analytics are ranked by recent ship velocity. Browse the "Cortex alternatives" section above for the current picks, or visit /alternatives/cortex-metrics for the full list with editorial commentary on each.