AppBreakup

UCSF ChimeraX alternatives: 3 apps ranked by verified data

Facts checked Nov 1, 2026AppBreakup editorialHow we rank

Common reasons people leave UCSF ChimeraX: commercial users must buy a licence, and not open source under an OSI licence. We ranked 3 alternatives by how directly each one replaces UCSF ChimeraX, then by reviews, real visits and how recently each app's facts were checked against its own website. PyMOL currently ranks first.

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Show all 3 alternatives

The best UCSF ChimeraX alternative for…

The highest-ranked app in this list for each need.

PyMOL logo

Best UCSF ChimeraX alternative for most people

PyMOL

The long-time standard for polished structure figures, with Python scripting.

VMD logo

Best UCSF ChimeraX alternative for a free option

VMD

Free viewer better suited to large systems and molecular dynamics trajectories.

Jmol logo

Best UCSF ChimeraX alternative for open source

Jmol

Open-source viewer that also embeds in web pages, useful for teaching.

PyMOL logo

Best UCSF ChimeraX alternative for Mac

PyMOL

The long-time standard for polished structure figures, with Python scripting.

PyMOL logo

Best UCSF ChimeraX alternative for Windows

PyMOL

The long-time standard for polished structure figures, with Python scripting.

PyMOL logo

Best UCSF ChimeraX alternative for Linux

PyMOL

The long-time standard for polished structure figures, with Python scripting.

Jmol logo

Best UCSF ChimeraX alternative for working in the browser

Jmol

Open-source viewer that also embeds in web pages, useful for teaching.

UCSF ChimeraX alternatives: common questions

What is the best alternative to UCSF ChimeraX?

PyMOL ranks first right now. The long-time standard for polished structure figures, with Python scripting. VMD and Jmol follow it in our ranking.

Is there a free alternative to UCSF ChimeraX?

Yes. VMD (free) and Jmol (open source) have a free option. Check each app's verified facts for current plan limits.

Is there an open-source alternative to UCSF ChimeraX?

Yes: Jmol.

Which UCSF ChimeraX alternatives work on Linux?

PyMOL, VMD and Jmol run on Linux.

Why do people switch from UCSF ChimeraX?

The complaints we hear most: commercial users must buy a licence; not open source under an OSI licence; less suited than VMD to analysing long simulation trajectories.

How is this list ranked?

Every app is scored with the same published formula: how directly it replaces UCSF ChimeraX, reviews (weighted by verification), visits from AppBreakup, how recently its facts were checked against its own website, and reader votes.