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c3dr vs webmockr

A side-by-side editorial comparison of c3dr and webmockr — release velocity, themes, recent moves, and the top alternatives to consider.

Shared themes:ropensci

c3dr vs webmockr: at a glance

Featurec3drwebmockr
SectorAnalyticsAnalytics
Velocity score0.00.0
Sparks · 30d00
Top themesbiomechanics, motion-capture, ropensci, r-packagehttp-mocking, testing, httr2, ropensci
Last editorial update5h ago1h ago
WebsiteVisit →Visit →

What is c3dr?

A biomechanics C3D reader graduated through rOpenSci review to CRAN, then learned to write force plates.

c3dr reads and writes C3D motion-capture files in R, wrapping the EZC3D library. It cleared rOpenSci peer review and moved into the rOpenSci organisation in April 2025, reached CRAN a month later, and shipped force-platform export in c3d_write() in August. Releases are close together and each one has a clear single purpose.

Read the full c3dr trajectory →

What is webmockr?

The stubbing library added httr2 support, then spent a year cutting itself free of everything else

webmockr intercepts HTTP requests in R tests and returns stubbed responses, and since 1.0.0 it covers all three clients that matter — httr, httr2 and crul. The releases through 2025 have been about shedding dependencies: internal R6 classes unexported in 2.1.0, crul demoted from Imports to Suggests in the same release, and the mutual dependency with vcr severed in 2.2.0. The package now installs and runs without pulling in the rest of the rOpenSci HTTP stack.

Read the full webmockr trajectory →

c3dr vs webmockr: editorial side-by-side

C
c3dr
ANALYTICS
0.0

A biomechanics C3D reader graduated through rOpenSci review to CRAN, then learned to write force plates.

◆ Current state

c3dr reads and writes C3D motion-capture files in R, wrapping the EZC3D library. It cleared rOpenSci peer review and moved into the rOpenSci organisation in April 2025, reached CRAN a month later, and shipped force-platform export in c3d_write() in August. Releases are close together and each one has a clear single purpose.

◆ Where it's heading

The package is filling in the write side of the read/write pair. Reading was in place from the start; 0.2.0 extends c3d_write() to force-platform data on a direct user request, and the accompanying work preserves matrix structure on import and tracks upstream EZC3D changes. The review-era releases hardened validation and error messages, so the current cycle can be spent on capability rather than polish.

◆ Prediction

Expect further coverage of C3D block types in the writer and continued tracking of EZC3D releases; the changelog gives no signal of analysis features beyond file I/O.

W
webmockr
ANALYTICS
0.0

The stubbing library added httr2 support, then spent a year cutting itself free of everything else

◆ Current state

webmockr intercepts HTTP requests in R tests and returns stubbed responses, and since 1.0.0 it covers all three clients that matter — httr, httr2 and crul. The releases through 2025 have been about shedding dependencies: internal R6 classes unexported in 2.1.0, crul demoted from Imports to Suggests in the same release, and the mutual dependency with vcr severed in 2.2.0. The package now installs and runs without pulling in the rest of the rOpenSci HTTP stack.

◆ Where it's heading

Two arcs run in sequence. The first is coverage — multiple queued responses in 0.7.0, basic auth mocking, async through crul, then httr2 — building out what can be stubbed. The second, starting with 2.0.0, is correctness and independence: stubs are now deleted if an error occurs mid-construction rather than lingering half-built, partial matching arrives for bodies and queries, and the dependency graph is pruned release by release. The 2.2.0 split from vcr landed within a minute of crul's release taking mocking control into its own clients.

◆ Prediction

RequestPattern is documented as still exported in 2.1.0 but slated for removal, so the next major release is where that lands. Expect continued dependency pruning rather than new client support — the three clients that exist are already covered.

Alternatives to c3dr and webmockr

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 c3dr or webmockr.

See all c3dr alternatives → · See all webmockr alternatives →

Recent activity from c3dr and webmockr

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

  1. 11mo agoc3drc3d_write() gains force platform export
  2. 1y agowebmockrvcr dependency severed
  3. 1y agowebmockrInternal classes unexported; crul becomes an optional dependency
  4. 1y agoc3drgcc 15 compilation fix
  5. 1y agoc3drFirst CRAN release
  6. 1y agoc3drrOpenSci review lands; repo moves to rOpenSci
  7. 1y agowebmockrFailed stub construction cleans up; partial matching extends to bodies and queries
  8. 2y agowebmockrhttr2 joins httr and crul as a supported client
  9. 3y agowebmockrQueued responses, body matching and integer status codes fixed
  10. 3y agowebmockrRegex URI matching fixed

Frequently asked questions

What is the difference between c3dr and webmockr?

Both compete on the same themes — ropensci — within Analytics. c3dr and webmockr 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 c3dr better than webmockr?

Sparkpulse doesn't pick a winner — we score release velocity, not feature parity. c3dr and webmockr 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 c3dr?

Top c3dr alternatives in Analytics are ranked by recent ship velocity. Browse the "c3dr alternatives" section above for the current picks, or visit /alternatives/c3dr for the full list with editorial commentary on each.

What are the best alternatives to webmockr?

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