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Comparison · Infra & APIs

eratosthenes vs Semgrep

A side-by-side editorial comparison of eratosthenes and Semgrep — release velocity, themes, recent moves, and the top alternatives to consider.

eratosthenes vs Semgrep: at a glance

FeatureeratosthenesSemgrep
SectorInfra & APIsInfra & APIs
Velocity score2.55.0
Sparks · 30d00
Top themesarchaeology, bayesian-inference, mcmc, input-validationstatic-analysis, language-coverage, scan-performance, large-repo-scaling
Last editorial update1h ago5d ago
WebsiteVisit →Visit →

What is eratosthenes?

eratosthenes spends 0.1.0 hardening inputs rather than adding chronology methods.

eratosthenes does Bayesian estimation of archaeological chronologies from relative sequences, absolute constraints and artifact assemblages. The 0.0.9 line built out the inference diagnostics — traceplots, histograms, batch-means MCSE reporting, displacement estimation — and then consolidated artifact probability-density estimation into a single gibbs_ad_type(). The 0.1.0 tag turns outward instead, adding validators for every user-supplied structure and replacing seq_check() with a more informative seq_diag().

Read the full eratosthenes trajectory →

What is Semgrep?

Semgrep keeps spending releases on parser breadth and large-repo throughput, not new surface.

Ten consecutive releases have gone into the engine rather than the product. The recurring shape is a parser refresh (Solidity, Ruby, Dart), a scan-performance change, and a batch of correctness fixes for Pro analysis. Nothing in this window changes what a team buys Semgrep for; it changes how reliably a scan finishes on a large repository.

Read the full Semgrep trajectory →

eratosthenes vs Semgrep: editorial side-by-side

E
eratosthenes
INFRA · APIS
2.5

eratosthenes spends 0.1.0 hardening inputs rather than adding chronology methods.

◆ Current state

eratosthenes does Bayesian estimation of archaeological chronologies from relative sequences, absolute constraints and artifact assemblages. The 0.0.9 line built out the inference diagnostics — traceplots, histograms, batch-means MCSE reporting, displacement estimation — and then consolidated artifact probability-density estimation into a single gibbs_ad_type(). The 0.1.0 tag turns outward instead, adding validators for every user-supplied structure and replacing seq_check() with a more informative seq_diag().

◆ Where it's heading

The package is moving from research code to something a non-author can run. Consolidating estimation behind one function, then wrapping every input class in a validator, are the two steps that make failures legible instead of cryptic, and the diagnostics added earlier serve the same end for the sampler itself. Nothing in the window changes the underlying model; the work is all about making it usable and its output checkable.

◆ Prediction

With inputs validated and diagnostics in place, the next release is more likely to extend the constraint or assemblage modelling than to keep reworking the interface, though the feed's three sparse tags give little to read a cadence from.

S
Semgrep
INFRA · APIS
5.0

Semgrep keeps spending releases on parser breadth and large-repo throughput, not new surface.

◆ Current state

Ten consecutive releases have gone into the engine rather than the product. The recurring shape is a parser refresh (Solidity, Ruby, Dart), a scan-performance change, and a batch of correctness fixes for Pro analysis. Nothing in this window changes what a team buys Semgrep for; it changes how reliably a scan finishes on a large repository.

◆ Where it's heading

The performance work is converging on one problem: very large monorepos. File targeting now batches path filtering across worker domains, rule parsing shards by bytes instead of worker count, and a new Pro memory policy lets a scan trade RAM for skipping on-disk caching. Running alongside it is a quieter thread of trust work, and the 1.173.0 fix for silently dropped targets belongs to it: a file whose path filtering failed appeared in neither the findings nor the skipped list, which is the kind of gap that undermines a scan report more than any missing rule.

◆ Prediction

Expect the parser-refresh-plus-throughput cadence to continue, with the memory policy and the dependency-path output likely graduating out of experimental once large-repo users report back on them.

Alternatives to eratosthenes and Semgrep

Other Infra & APIs 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 eratosthenes or Semgrep.

See all eratosthenes alternatives → · See all Semgrep alternatives →

Recent activity from eratosthenes and Semgrep

Latest ship moves from both products, interleaved chronologically. ⚡ = editorial spark.

  1. 5d agoSemgrepSolidity parser refresh; batched targeting for very large repos
  2. 10d agoeratosthenesInput validators added; seq_check() replaced by seq_diag()
  3. 21d agoSemgrepOpenTofu files scanned as Terraform; Ruby parser updated
  4. 27d agoSemgrepBuild moves to a patched OCaml compiler to stop rare crashes
  5. 1mo agoSemgrepPro C/C++ scans skip statically-dead preprocessor branches
  6. 1mo agoSemgrepDart parser updated to a newer upstream version
  7. 1mo agoSemgrepExperimental flag exposes full paths for transitive dependency findings
  8. 1y agoeratosthenesArtifact p.d.f. estimation consolidated into gibbs_ad_type()
  9. 1y agoeratosthenesMCMC diagnostics arrive: traceplots, histograms, batch-means MCSE

Frequently asked questions

What is the difference between eratosthenes and Semgrep?

They serve adjacent needs but don't currently overlap on shipped themes. Semgrep is currently shipping more aggressively (velocity 5.0 vs 2.5), 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 eratosthenes better than Semgrep?

Sparkpulse doesn't pick a winner — we score release velocity, not feature parity. Semgrep is currently shipping more aggressively (velocity 5.0 vs 2.5), with 0 editorial sparks in the last 30 days against 0. For your specific use case, the alternatives sections above list other Infra & APIs products to evaluate alongside.

What are the best alternatives to eratosthenes?

Top eratosthenes alternatives in Infra & APIs are ranked by recent ship velocity. Browse the "eratosthenes alternatives" section above for the current picks, or visit /alternatives/eratosthenes for the full list with editorial commentary on each.

What are the best alternatives to Semgrep?

Top Semgrep alternatives in Infra & APIs are ranked by recent ship velocity. Browse the "Semgrep alternatives" section above for the current picks, or visit /alternatives/semgrep for the full list with editorial commentary on each.