Buildkite
Buildkite keeps converting hand-rolled agent workarounds into first-class CI primitives.
Comparison · Infra & APIs
admtools vs xpose4
A side-by-side editorial comparison of admtools and xpose4 — release velocity, themes, recent moves, and the top alternatives to consider.
admtools vs xpose4: at a glance
What is admtools?
The age-depth engine under a small stratigraphy stack, growing one adapter at a time
admtools estimates and manipulates age-depth models, with the generics time_to_strat() and strat_to_time() as the transformation layer a small stratigraphy stack is built on. Since 0.1.0 it has accumulated the S3 vocabulary that work needs — sac for sediment accumulation curves, timelist and stratlist for time- and height-associated data — and then adapters outward: pre_paleoTS for StratPal and paleoTS in 0.4.0, FossilSim taxonomy and fossils objects in 0.5.0, and age-to-time transformation for FossilSim in 0.6.0. Version 0.5.0 also added what it calls basic functionality for depth-depth models alongside the age-depth ones.
What is xpose4?
NONMEM's veteran diagnostics package, now moving at about one fix a year
xpose4 generates diagnostic plots for nonlinear mixed-effect models fitted in NONMEM, a role it has held since 2014 when five packages were consolidated into one. The three most recent releases are a documentation cross-reference update, a change of the default table-reading method to the slower and more reliable one, and a set of file-parsing bug fixes. No new plot types appear anywhere in the window.
admtools vs xpose4: editorial side-by-side
admtools
0.0INFRA · APIS
The age-depth engine under a small stratigraphy stack, growing one adapter at a time
◆ Current state
admtools estimates and manipulates age-depth models, with the generics time_to_strat() and strat_to_time() as the transformation layer a small stratigraphy stack is built on. Since 0.1.0 it has accumulated the S3 vocabulary that work needs — sac for sediment accumulation curves, timelist and stratlist for time- and height-associated data — and then adapters outward: pre_paleoTS for StratPal and paleoTS in 0.4.0, FossilSim taxonomy and fossils objects in 0.5.0, and age-to-time transformation for FossilSim in 0.6.0. Version 0.5.0 also added what it calls basic functionality for depth-depth models alongside the age-depth ones.
◆ Where it's heading
This package moves in step with StratPal, from the same group: admtools 0.4.0 shipped its pre_paleoTS transformations fifty-seven minutes before StratPal released the class itself, and both took on FossilSim within a month of each other in spring 2025. The pattern is consistent — establish generics, define classes, then connect to whatever package the field already uses. The depth-depth work is the one thread pointing inward rather than outward, and it is still described as basic.
◆ Prediction
Depth-depth models are the obvious thing to finish, since they mirror age-depth machinery the package already has; expect any release here to be shadowed by a matching change in StratPal within weeks either side.
xpose4
0.0INFRA · APIS
NONMEM's veteran diagnostics package, now moving at about one fix a year
◆ Current state
xpose4 generates diagnostic plots for nonlinear mixed-effect models fitted in NONMEM, a role it has held since 2014 when five packages were consolidated into one. The three most recent releases are a documentation cross-reference update, a change of the default table-reading method to the slower and more reliable one, and a set of file-parsing bug fixes. No new plot types appear anywhere in the window.
◆ Where it's heading
Development now responds to the R ecosystem rather than to pharmacometrics: deprecated dplyr and tibble calls, readr and gam changes, and R documentation standards account for most recent entries. The last release with visible new capability is 4.6.0 in 2017, which extended xpose.VPC() with outlier identification, median-positioned lines and bin rugs. The feed's older tags are also unreliable — versions 4.5.0 through 4.5.3 all carry the same 2014 timestamp, so their order says nothing about sequence.
◆ Prediction
Expect continued compatibility maintenance at roughly one release a year, triggered by changes in R or in the packages it reads tables with; nothing in these entries points to new diagnostic capability being planned.
Alternatives to admtools and xpose4
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 admtools or xpose4.
Cursor
Cursor's agents stop waiting to be asked - they subscribe, and they hold a goal until it's done.
incident.io
Nexus does the diagnosis; the agent is now reaching into the status page too.
Warp
Warp turned its quarter of software-factory essays into infrastructure you can buy.
Okta
Okta's developer blog is a Cross App Access campaign, now diluted by advocacy-team storytelling.
tealeaves
A leaf-temperature model that finished its job in 2020 and has stayed finished
See all admtools alternatives → · See all xpose4 alternatives →
Recent activity from admtools and xpose4
Latest ship moves from both products, interleaved chronologically. ⚡ = editorial spark.
- 11mo agoxpose4Documentation cross-references updated to R standards
- 1y agoadmtoolsAge-to-time transformation for FossilSim integration
- 1y agoadmtoolsDepth-depth models and FossilSim object transformations
- 1y agoadmtoolspre_paleoTS transformations and age-depth model anchoring
- 1y agoadmtoolsMore sedimentation-rate generator options and sac utilities
- 2y agoadmtoolstimelist and stratlist classes; unified transformation syntax
- 2y agoadmtoolsMultiple tie points, sedimentation-rate estimation and the sac class
- 4y agoxpose4Default table reading switched to the 'slow' method
- 5y agoxpose4Fixes for -99 row filtering, catab/cotab covariates and CSV import
- 6y agoxpose4Adjustable censored-line length in kaplan.plot()
- 8y agoxpose4Compliance updates for readr and gam changes
- 9y agoxpose4VPC outlier identification, median lines and bin rugs
Frequently asked questions
What is the difference between admtools and xpose4?
They serve adjacent needs but don't currently overlap on shipped themes. admtools and xpose4 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 admtools better than xpose4?
Sparkpulse doesn't pick a winner — we score release velocity, not feature parity. admtools and xpose4 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 Infra & APIs products to evaluate alongside.
What are the best alternatives to admtools?
Top admtools alternatives in Infra & APIs are ranked by recent ship velocity. Browse the "admtools alternatives" section above for the current picks, or visit /alternatives/admtools for the full list with editorial commentary on each.
What are the best alternatives to xpose4?
Top xpose4 alternatives in Infra & APIs are ranked by recent ship velocity. Browse the "xpose4 alternatives" section above for the current picks, or visit /alternatives/xpose4 for the full list with editorial commentary on each.