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Comparison · Analytics
epinowcast vs igoR
A side-by-side editorial comparison of epinowcast and igoR — release velocity, themes, recent moves, and the top alternatives to consider.
Shared themes:r
epinowcast vs igoR: at a glance
What is epinowcast?
epinowcast added Gaussian processes to its formula interface and made the sampler twice as fast
epinowcast is a Bayesian nowcasting toolkit for right-truncated epidemiological count data, built on Stan with a brms-style formula interface. Over 2025-2026 it moved from experimental to stable, prepared for CRAN, and broadened past nowcasting proper — 0.6.0's max_delay = 1 support allows purely retrospective fitting of fully reported counts. 0.7.0 in July 2026 is the largest modelling release in the window.
What is igoR?
igoR reached 1.0.0 with no user-visible change, then spent three releases on AI-assisted cleanup
igoR provides access to Intergovernmental Organizations (IGO) databases from the Correlates of War project. The dataset and public API have been stable for years; recent releases are almost entirely maintenance. 1.0.0 in January 2026 raised the minimum R version to 3.6.0 and stated explicitly that users would see no change.
epinowcast vs igoR: editorial side-by-side
epinowcast
0.0ANALYTICS
epinowcast added Gaussian processes to its formula interface and made the sampler twice as fast
◆ Current state
epinowcast is a Bayesian nowcasting toolkit for right-truncated epidemiological count data, built on Stan with a brms-style formula interface. Over 2025-2026 it moved from experimental to stable, prepared for CRAN, and broadened past nowcasting proper — 0.6.0's max_delay = 1 support allows purely retrospective fitting of fully reported counts. 0.7.0 in July 2026 is the largest modelling release in the window.
◆ Where it's heading
The package is converging on a general formula-driven latent process toolkit rather than a single nowcasting model. rw() and arima() were joined in 0.7.0 by gp(), a Hilbert-space reduced-rank Gaussian process placeable on any module's linear predictor with selectable kernels and an integration order matching arima()'s d. Alongside it, the fixed-effects design and integrated residuals are now centred against the module intercept, which the notes report roughly doubles sampling speed on a weekly random-walk growth model.
◆ Prediction
With CRAN preparation done in 0.6.0 and the model surface substantially widened in 0.7.0, the next release is likely a CRAN submission plus consolidation of the gp() kernels. The release notes repeatedly benchmark against EpiNow2's behaviour, suggesting continued convergence between the two codebases.
igoR
0.0ANALYTICS
igoR reached 1.0.0 with no user-visible change, then spent three releases on AI-assisted cleanup
◆ Current state
igoR provides access to Intergovernmental Organizations (IGO) databases from the Correlates of War project. The dataset and public API have been stable for years; recent releases are almost entirely maintenance. 1.0.0 in January 2026 raised the minimum R version to 3.6.0 and stated explicitly that users would see no change.
◆ Where it's heading
Development has shifted to documentation and internal consistency, and the mechanism is notable: 1.0.2 and 1.0.3 both describe AI-assisted editing and refactoring, part of a sweep the same maintainer ran across several packages in mid-2026. The one substantive fix in the window is igo_dyadic() computing dyadid from both state codes as documented. Everything else is dependency bumps and message wording.
◆ Prediction
With the internals refactored and documentation reviewed, further releases are likely to track upstream Correlates of War data updates rather than change the API. The entries give no indication of a pending data revision.
Alternatives to epinowcast and igoR
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 epinowcast or igoR.
spsurvey
spsurvey has spent four years consolidating after its 5.0.0 rewrite rather than adding to it
StreamCatTools
StreamCatTools is quietly moving off web services and onto cloud-native GeoParquet
reproducible
reproducible added a windowed read path so remote GeoTiffs never fully download
qcTAF
qcTAF is building an automated checklist for reproducible fisheries assessments, one criterion at a time
rpymat
After three dormant years, rpymat returned to fix the OpenMP crash that breaks R and conda together
See all epinowcast alternatives → · See all igoR alternatives →
Recent activity from epinowcast and igoR
Latest ship moves from both products, interleaved chronologically. ⚡ = editorial spark.
- 1mo agoepinowcastgp() brings Gaussian processes to every module, and centring doubles sampling speed ⚡
- 1mo agoigoRigo_dyadic() fixes dyadid computation; internals refactored
- 2mo agoigoRDocumentation reviewed with AI-assisted editing
- 3mo agoepinowcastCRAN preparation, inspection methods, and retrospective-only fitting
- 5mo agoigoRCOPYRIGHTS updated; vignettes migrated to Quarto
- 7mo agoigoRFirst major version; minimum R raised to 3.6.0
- 7mo agoepinowcastStructural reporting patterns for non-daily reporting cycles
- 10mo agoepinowcastLifecycle moves to stable; pathfinder and negative binomial support
- 1y agoigoRRoutine documentation update
- 2y agoepinowcastNon-parametric reference date models and a stricter max_delay default
- 2y agoigoRRecode helpers for IGO year, state year and dyadic data
- 3y agoepinowcastFix initial conditions for cmdstan 2.32.1 compatibility
Frequently asked questions
What is the difference between epinowcast and igoR?
Both compete on the same themes — r — within Analytics. epinowcast and igoR 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 epinowcast better than igoR?
Sparkpulse doesn't pick a winner — we score release velocity, not feature parity. epinowcast and igoR 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 epinowcast?
Top epinowcast alternatives in Analytics are ranked by recent ship velocity. Browse the "epinowcast alternatives" section above for the current picks, or visit /alternatives/epinowcast for the full list with editorial commentary on each.
What are the best alternatives to igoR?
Top igoR alternatives in Analytics are ranked by recent ship velocity. Browse the "igoR alternatives" section above for the current picks, or visit /alternatives/igor for the full list with editorial commentary on each.