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For years, chemists on a budget had a reliable answer to “I can’t afford ChemDraw”: download ACD/ChemSketch, which offered solid free structure drawing for non-commercial use, and move on with your research. That fallback disappeared in January 2026, when Revvity completed its acquisition of ACD/Labs and sunset ChemSketch entirely — no new downloads, no continued support. Combined with Revvity’s earlier decision, in January 2025, to discontinue perpetual ChemDraw licenses in favor of a subscription-only model, independent researchers, postdocs, and small labs are now facing a genuinely different software landscape than they were eighteen months ago. Here’s how the real alternatives stack up.
Why this matters now, specifically
ChemDraw subscriptions currently run in the $25–170+ per month range depending on tier, and unlike the old perpetual-license model — where a one-time purchase could serve a lab for five or ten years — that’s now a recurring line item with no ceiling in sight. For a lab that bought a ChemDraw license once in 2018 and used it for years afterward, the subscription shift represents a real, ongoing cost increase, and the loss of ChemSketch as a free fallback removes the safety net that used to make ChemDraw’s price hikes tolerable.
The free and open-source tier
Ketcher, maintained by EPAM under an Apache-2.0 license, is the most widely used open-source structure editor and runs entirely in the browser — no account, no install, no admin rights needed on a managed lab computer. That last point matters more than it sounds: plenty of university and industry lab machines restrict software installation, and a browser-based tool sidesteps that friction entirely.
MarvinSketch, from ChemAxon, is free for academic and educational use with a straightforward license request, and supports IUPAC naming, Markush structures for representing variable substituent groups, and basic property prediction — a meaningfully more capable free tier than most alternatives offer. MolView is another fully open-source, browser-based option, and pairs well with Avogadro, an open-source desktop tool for 3D molecular modeling, if your work extends into visualization beyond 2D structure drawing.
The low-cost paid tier
ChemDoodle sits at a genuinely different price point than ChemDraw — a one-time $29 purchase or roughly $14/month — and handles IUPAC naming, multiple journal formatting presets, and most common file formats (MOL, SDF, SMILES, InChI). Its main limitation is that it doesn’t natively support ChemDraw’s proprietary CDX file format without a conversion step, and it lacks integration with SciFinder and Signals Notebook that some commercial and pharma users depend on for their existing workflows. For most researchers doing 2D structure drawing, property calculation, and reaction schemes without those specific integration needs, that’s a minor trade-off against the substantial cost savings.
The AI-native layer
A newer category has emerged that layers AI-assisted analysis on top of standard structure editing. Tools in this space (built variously on the open-source Ketcher editor and RDKit cheminformatics toolkit, though the hosted AI features themselves are typically proprietary) add retrosynthesis suggestions, quick property checks, and reaction-planning assistance directly inside the drawing interface. This is worth watching as a category rather than endorsing any single product outright, since it’s evolving quickly and the underlying AI quality varies significantly between offerings — the same due diligence you’d apply to evaluating any AI tool’s accuracy claims should apply here before trusting its output in a manuscript or patent filing.
What we’d actually recommend, by use case
If you’re a student or educator working on a Windows machine: ChemSketch’s disappearance leaves MarvinSketch as the strongest free desktop option, particularly for coursework requiring IUPAC naming or Markush structure representation.
If you need something that works instantly on any machine, including locked-down lab computers: Ketcher is the answer. Free, no account, runs in any modern browser.
If you want ChemDraw-equivalent output quality for manuscript figures and can accept a small one-time cost: ChemDoodle at $29 is difficult to beat, provided you don’t specifically need CDX file compatibility or SciFinder integration.
If your institution already pays for ChemDraw and the cost isn’t coming out of your own pocket: there’s genuinely no urgent reason to switch. ChemDraw remains a comprehensive, well-supported tool, and the alternatives above are about giving independent researchers and cost-conscious labs real options — not arguing that ChemDraw itself has gotten worse.
The bigger picture
What’s actually happening here is a market realignment following two consolidation moves by the same company within about a year of each other. Revvity now controls both the dominant commercial structure-drawing tool and, through the ACD/Labs acquisition, what had been the most credible free alternative — and it chose to shut the free option down rather than maintain it alongside ChemDraw. Whether that was a deliberate move to funnel free users toward paid subscriptions or simply a straightforward product-rationalization decision after an acquisition, the practical effect is the same: the field of viable alternatives is more open than it’s been in years, and cost-conscious chemists now have real reason to look beyond the traditional default.
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