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Comparison · Analytics
Polars vs ntopng
A side-by-side editorial comparison of Polars and ntopng — release velocity, themes, recent moves, and the top alternatives to consider.
Polars vs ntopng: at a glance
What is Polars?
A deprecation sweep and hive-partition join rewrites, shipped on two trains at once.
Polars releases Python and Rust builds in lockstep, with each Rust tag naming the Python version its DSL matches. The recent work is concentrated in two places: query-plan performance — len() pushdown into concat and union inputs, pre-partitioning on hive-partitioned joins, split multiplexers scanning in-memory DataFrames — and cloud IO, where an adaptive HTTP rate-limiter and a global DNS cache landed. Correctness fixes reach into unsoundness in rayon block_on and undefined behaviour on empty chunks.
What is ntopng?
ntopng grew from traffic monitor into asset inventory and vulnerability scanner — one major at a time
ntopng ships roughly one stable major a year. The 6.x line added vulnerability scanning and CVE support, then an Asset Inventory and Digital Twin with an assets dashboard, then autonomous-system dashboards with native ClickHouse Cloud SSL and a direct flow dump mode for real-time export. The last published release was 6.6 in November 2025, so this feed is currently quiet.
Polars vs ntopng: editorial side-by-side
Polars
5.0ANALYTICS
A deprecation sweep and hive-partition join rewrites, shipped on two trains at once.
◆ Current state
Polars releases Python and Rust builds in lockstep, with each Rust tag naming the Python version its DSL matches. The recent work is concentrated in two places: query-plan performance — len() pushdown into concat and union inputs, pre-partitioning on hive-partitioned joins, split multiplexers scanning in-memory DataFrames — and cloud IO, where an adaptive HTTP rate-limiter and a global DNS cache landed. Correctness fixes reach into unsoundness in rayon block_on and undefined behaviour on empty chunks.
◆ Where it's heading
The 1.43.0 release carried seven deprecations at once — numeric-to-categorical casts, casts from non-nested dtypes into lists, bitwise ops between integers and booleans, LazyFrame.profile, unnamed list.to_struct calls — and 1.43.2 added more. That density of deprecation in minor releases is how a project narrows its type semantics before a major. Alongside it, Iceberg and Delta support keeps taking fixes, which is where the lakehouse-format work is showing up.
◆ Prediction
Expect the deprecation cycle to keep tightening casting and categorical semantics, with performance work staying focused on hive-partitioned and cloud-hosted data where the query planner has the most left to exploit.
ntopng
0.0ANALYTICS
ntopng grew from traffic monitor into asset inventory and vulnerability scanner — one major at a time
◆ Current state
ntopng ships roughly one stable major a year. The 6.x line added vulnerability scanning and CVE support, then an Asset Inventory and Digital Twin with an assets dashboard, then autonomous-system dashboards with native ClickHouse Cloud SSL and a direct flow dump mode for real-time export. The last published release was 6.6 in November 2025, so this feed is currently quiet.
◆ Where it's heading
Each major has annexed an adjacent category rather than deepening flow analysis: security posture in 6.0, asset management in 6.4, and infrastructure-scale visibility in 6.6. Underneath, ClickHouse has steadily replaced the older storage paths, moving from an option in 5.2 to the assumed backend with a real-time export mode. The result is a product competing well outside its original network-monitoring lane.
◆ Prediction
With the last release nine months old, the next major is overdue; based on the pattern it would extend the asset and security surfaces rather than the flow engine.
Alternatives to Polars and ntopng
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 Polars or ntopng.
Apache SeaTunnel
SeaTunnel can finally split one large file across readers — and hasn't shipped since March.
Parseable
Parseable is bolting real auth onto a log store — API keys, dataset permissions, Kafka IAM.
Apache SkyWalking
SkyWalking is rebuilding its own foundations — its own database, its own runtime, and now GenAI traces
MotherDuck
MotherDuck is building the governance layer its agent-native pipelines already needed.
OpenSearch Dashboards
Four commits in thirteen months: this feed samples OpenSearch Dashboards, it doesn't cover it.
See all Polars alternatives → · See all ntopng alternatives →
Recent activity from Polars and ntopng
Latest ship moves from both products, interleaved chronologically. ⚡ = editorial spark.
- 6h agoPolarsRust 0.55.2 adds an adaptive HTTP rate-limiter for cloud IO
- 1d agoPolarsRust 0.55.1 rewrites joins on hive-partitioned data
- 5d agoPolarsPython 1.43.2 deprecates Categorical-to-integer casts
- 10d agoPolarsPython 1.43.1 allows callback sinks on cloud targets
- 16d agoPolarsPython 1.43.0 lands seven deprecations in one release
- 1mo agoPolarsPython 1.42.1 samples multi-file parquet metadata resolution
- 8mo agontopngntopng 6.6: AS dashboards and real-time ClickHouse export
- 1y agontopngntopng 6.4 adds Asset Inventory and Digital Twin ⚡
- 1y agontopngntopng 6.2: memory halved, MITRE alert classification
- 2y agontopngntopng 6.0 adds vulnerability scanning and CVE support ⚡
- 3y agontopngntopng 5.6: Kafka, ClickHouse clusters, Vue.js rework
- 3y agontopngntopng 5.4: new search, ELK 8 support, service map additions
Frequently asked questions
What is the difference between Polars and ntopng?
They serve adjacent needs but don't currently overlap on shipped themes. Polars is currently shipping more aggressively (velocity 5.0 vs 0.0), with 0 editorial sparks in the last 30 days against 0. See the at-a-glance table above for a side-by-side breakdown of velocity, recent sparks, and editorial themes.
Is Polars better than ntopng?
Sparkpulse doesn't pick a winner — we score release velocity, not feature parity. Polars is currently shipping more aggressively (velocity 5.0 vs 0.0), with 0 editorial sparks in the last 30 days against 0. For your specific use case, the alternatives sections above list other Analytics products to evaluate alongside.
What are the best alternatives to Polars?
Top Polars alternatives in Analytics are ranked by recent ship velocity. Browse the "Polars alternatives" section above for the current picks, or visit /alternatives/polars for the full list with editorial commentary on each.
What are the best alternatives to ntopng?
Top ntopng alternatives in Analytics are ranked by recent ship velocity. Browse the "ntopng alternatives" section above for the current picks, or visit /alternatives/ntopng for the full list with editorial commentary on each.