Aerospike
Aerospike shipped a coordinated CVE train across four release branches in one afternoon
Comparison · DevOps
Psi4 vs Apache TomEE
A side-by-side editorial comparison of Psi4 and Apache TomEE — release velocity, themes, recent moves, and the top alternatives to consider.
Psi4 vs Apache TomEE: at a glance
What is Psi4?
Psi4 is closing the gap with ORCA on the methods that decide which code a lab installs
Psi4 ships a major version roughly annually with a trail of conda-compatibility patch releases behind each one. The 1.11 cycle is the most competitively pointed in the window: DLPNO-CCSD and DLPNO-CCSD(T) become callable methods, with cutoffs deliberately tuned to match ORCA, and ZORA arrives for scalar-relativistic core Hamiltonians. Around the science, the project spends heavily on Python-ecosystem plumbing — QCSchema v2, Python 3.14 support, and the QCArchive dependency chain that most of its patch releases exist to unbreak.
What is Apache TomEE?
A Jakarta EE server whose changelog is mostly dependabot — until EE11 moved to main
TomEE ships a steady stream of 10.1.x and 10.2.0 patch releases whose release notes are dominated by dependency bumps and regenerated BOMs, with one or two real TOMEE- ticket fixes buried in each. The genuinely new thing is 11.0.0-M1, the first milestone of the next major line, created when Jakarta EE 11 work moved onto the main branch. The 10.x line continues in parallel as the stable target.
Psi4 vs Apache TomEE: editorial side-by-side
Psi4
0.0DEVOPS
Psi4 is closing the gap with ORCA on the methods that decide which code a lab installs
◆ Current state
Psi4 ships a major version roughly annually with a trail of conda-compatibility patch releases behind each one. The 1.11 cycle is the most competitively pointed in the window: DLPNO-CCSD and DLPNO-CCSD(T) become callable methods, with cutoffs deliberately tuned to match ORCA, and ZORA arrives for scalar-relativistic core Hamiltonians. Around the science, the project spends heavily on Python-ecosystem plumbing — QCSchema v2, Python 3.14 support, and the QCArchive dependency chain that most of its patch releases exist to unbreak.
◆ Where it's heading
Two things are being built at once. Scientifically, the code is filling in the local-correlation and relativistic methods that users otherwise leave for commercial packages, plus external-potential and embedding machinery that makes Psi4 usable as a QM engine inside larger workflows. Structurally, it is betting on the QCArchive stack — qcelemental, qcengine, qcmanybody, optking, qcfractal — which delivers interoperability but also means a Python packaging change downstream can force a release, as 1.10.1 and 1.10.2 both did.
◆ Prediction
The DLPNO work landed as energies only, so analytic gradients for DLPNO-CCSD are the natural next step. Expect at least one more 1.11.x patch driven by the QCFractal and pydantic constraints that the 1.11 notes flag as still unresolved for Python 3.14.
Apache TomEE
2.5DEVOPS
A Jakarta EE server whose changelog is mostly dependabot — until EE11 moved to main
◆ Current state
TomEE ships a steady stream of 10.1.x and 10.2.0 patch releases whose release notes are dominated by dependency bumps and regenerated BOMs, with one or two real TOMEE- ticket fixes buried in each. The genuinely new thing is 11.0.0-M1, the first milestone of the next major line, created when Jakarta EE 11 work moved onto the main branch. The 10.x line continues in parallel as the stable target.
◆ Where it's heading
The project is running the classic app-server two-track pattern: keep 10.x boring and current on its dependency surface, while the EE11 rearchitecture accumulates on main behind milestone tags. Nearly all visible energy goes into staying aligned with Tomcat, ActiveMQ, Hibernate, Jackson and MicroProfile versions — which for a server whose value is spec compliance is the actual product work, not a distraction from it.
◆ Prediction
Expect further 11.0.0 milestones with EE11 certification as the gate, while 10.1.x/10.2.x continue absorbing upstream dependency updates and isolated ticket fixes.
Alternatives to Psi4 and Apache TomEE
Other DevOps 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 Psi4 or Apache TomEE.
Firebird
Firebird maintains three release branches at once and ships the same fixes to all of them
GeoTools
GeoTools is migrating off dead Java imaging infrastructure that the whole GeoServer stack sits on
SU2
SU2 is growing from an aerodynamics solver into a coupled multiphysics optimizer
libosmium
libosmium is a stable OSM parsing library whose main work now is shedding old dependencies
OpenMM
OpenMM keeps opening new simulation domains while pushing more of the run onto the GPU
See all Psi4 alternatives → · See all Apache TomEE alternatives →
Recent activity from Psi4 and Apache TomEE
Latest ship moves from both products, interleaved chronologically. ⚡ = editorial spark.
- 24d agoApache TomEE10.2.0 fixes a request-scope LinkageError and unchained auth exceptions
- 1mo agoApache TomEE11.0.0-M1 opens the next major line with EE11 work on main
- 1mo agoPsi4Psi4 1.11 makes DLPNO-CCSD(T) callable and matches ORCA's cutoffs ⚡
- 1mo agoPsi4Psi4 1.10.2 unbreaks adcc with QCFractal 0.65
- 2mo agoPsi4Psi4 1.10.1 widens conda pins, fixes path-advisor solving
- 2mo agoApache TomEE10.1.5 repairs resources with an explicit String constructor-type
- 6mo agoApache TomEEApache TomEE 10.1.4
- 7mo agoApache TomEE10.1.3 removes transaction propagation
- 10mo agoApache TomEEApache TomEE 10.1.2
- 11mo agoPsi4Psi4 1.10 adds MP2-F12, SAPT0-D4M and an LS-THC Python interface
- 2y agoPsi4Psi4 1.9 adds unrestricted-LDA analytic Hessians and new SCF guesses
- 2y agoPsi4Psi4 1.9.1 pins pytest 7 and prefers released libint
Frequently asked questions
What is the difference between Psi4 and Apache TomEE?
They serve adjacent needs but don't currently overlap on shipped themes. Apache TomEE 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 Psi4 better than Apache TomEE?
Sparkpulse doesn't pick a winner — we score release velocity, not feature parity. Apache TomEE 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 DevOps products to evaluate alongside.
What are the best alternatives to Psi4?
Top Psi4 alternatives in DevOps are ranked by recent ship velocity. Browse the "Psi4 alternatives" section above for the current picks, or visit /alternatives/psi4 for the full list with editorial commentary on each.
What are the best alternatives to Apache TomEE?
Top Apache TomEE alternatives in DevOps are ranked by recent ship velocity. Browse the "Apache TomEE alternatives" section above for the current picks, or visit /alternatives/apache-tomee for the full list with editorial commentary on each.