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Comparison · Analytics
PySCF vs Umami
A side-by-side editorial comparison of PySCF and Umami — release velocity, themes, recent moves, and the top alternatives to consider.
PySCF vs Umami: at a glance
What is PySCF?
Quantum chemistry package adding whole method families every release.
PySCF is a Python-based quantum chemistry toolkit, and its release cadence is unusually feature-dense: each version lands multiple new electronic-structure methods rather than polishing existing ones. Recent releases have built out the GW/BSE excited-state stack, k-point RPA for periodic systems, higher-order coupled cluster, and multi-state PDFT with analytical gradients. Platform work runs alongside — Windows DLL compatibility, GPU4PySCF interfacing, and configurable einsum backends.
What is Umami?
Umami spent late 2025 patching Next.js CVEs, then shipped Boards and Session Replay in v3.1.0.
The window splits sharply. Four of six releases are December 2025 patches across the v2 and v3 lines, all responding to the same Next.js and React security advisories plus Docker build breakage — several shipped within days of each other because the first fix updated Next.js without the affected React versions. Then v3.1.0 in April 2026 delivered custom dashboards as Boards, Session Replay, Web Vitals performance tracking, a redesigned share page, and a large batch of fixes.
PySCF vs Umami: editorial side-by-side
PySCF
2.5ANALYTICS
Quantum chemistry package adding whole method families every release.
◆ Current state
PySCF is a Python-based quantum chemistry toolkit, and its release cadence is unusually feature-dense: each version lands multiple new electronic-structure methods rather than polishing existing ones. Recent releases have built out the GW/BSE excited-state stack, k-point RPA for periodic systems, higher-order coupled cluster, and multi-state PDFT with analytical gradients. Platform work runs alongside — Windows DLL compatibility, GPU4PySCF interfacing, and configurable einsum backends.
◆ Where it's heading
Two arcs are visible. The methods arc is pushing toward periodic (PBC) parity with molecular calculations — PBC GW, PBC RPA, SOC-ECP for PBC DFT, QM/MM for periodic systems all landed in this window. The infrastructure arc is about getting PySCF to run where it previously did not: Windows, GPUs, alternative tensor-contraction backends.
◆ Prediction
The PBC catch-up should continue, since each release closes another gap between molecular and periodic implementations of the same method; the entries do not indicate which gap is next.
Umami
0.0ANALYTICS
Umami spent late 2025 patching Next.js CVEs, then shipped Boards and Session Replay in v3.1.0.
◆ Current state
The window splits sharply. Four of six releases are December 2025 patches across the v2 and v3 lines, all responding to the same Next.js and React security advisories plus Docker build breakage — several shipped within days of each other because the first fix updated Next.js without the affected React versions. Then v3.1.0 in April 2026 delivered custom dashboards as Boards, Session Replay, Web Vitals performance tracking, a redesigned share page, and a large batch of fixes.
◆ Where it's heading
The security cluster is a framework dependency showing its cost — an analytics tool inheriting its release schedule from Next.js advisories. v3.1.0 is where product work resumes, and its content is telling: Session Replay and Web Vitals move Umami past pageview counting into behaviour and performance, which is the territory occupied by heavier commercial analytics rather than the lightweight privacy-first tools it grew up alongside.
◆ Prediction
Expect the next releases to build on Boards and Session Replay rather than return to the counting core, since both are new surfaces that arrived with a single release and no follow-up yet.
Alternatives to PySCF and Umami
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 PySCF or Umami.
Omni
Omni ships weekly, and almost every week the headline item is an AI feature
OpenDataDiscovery
Four ODD Platform releases in two weeks, and not one of them changes the product
Apache Baremaps
Baremaps got geoparquet and hillshading, then went quiet for eighteen months in incubation
Deequ
Deequ ships GitHub tags whose release notes are one commit message long
Marquez
Marquez spent 2024 turning a lineage store into a UI, then stopped releasing
Recent activity from PySCF and Umami
Latest ship moves from both products, interleaved chronologically. ⚡ = editorial spark.
- 24d agoPySCFBethe-Salpeter equation, k-point RPA, and Windows compatibility
- 2mo agoPySCFPatch release: missing CP2K basis data in wheels, ECP loading fallback
- 3mo agoPySCFASE band structure interface, SOC-ECP for periodic DFT, PCM surface discretization
- 3mo agoUmamiv3.1.0: Boards, Session Replay and Web Vitals ⚡
- 6mo agoPySCFNumPy 2.4 compatibility fix and smearing convergence tweak
- 6mo agoPySCFHigh-performance CCSDT/CCSDTQ, density-fitted NEVPT2, configurable einsum backend
- 8mo agoUmamiv3.0.3: Next.js security patch
- 8mo agoUmamiv2.20.2: Next.js security patch for the v2 line
- 8mo agoUmamiv2.20.1: React version fix and Docker build repairs
- 8mo agoUmamiv2.20.0: Next.js CVE fix for the v2 line
- 8mo agoUmamiv3.0.2: Next.js RSC vulnerability patch and UI fixes
- 9mo agoPySCFMulti-state PDFT family lands with analytical gradients and QM/MM for periodic systems
Frequently asked questions
What is the difference between PySCF and Umami?
They serve adjacent needs but don't currently overlap on shipped themes. PySCF is currently shipping more aggressively (velocity 2.5 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 PySCF better than Umami?
Sparkpulse doesn't pick a winner — we score release velocity, not feature parity. PySCF is currently shipping more aggressively (velocity 2.5 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 PySCF?
Top PySCF alternatives in Analytics are ranked by recent ship velocity. Browse the "PySCF alternatives" section above for the current picks, or visit /alternatives/pyscf for the full list with editorial commentary on each.
What are the best alternatives to Umami?
Top Umami alternatives in Analytics are ranked by recent ship velocity. Browse the "Umami alternatives" section above for the current picks, or visit /alternatives/umami for the full list with editorial commentary on each.