Surgimap Alternatives in 2026: What Spine Surgeons Are Switching To

By the SpineOS team · Updated July 7, 2026 · 8 min read

Surgimap — for years the free de facto standard for Cobb, SVA, PI/PT, and lumbar lordosis measurement and case planning — has discontinued new-user registration, according to a peer-reviewed paper published in November 2025. That means anyone looking for a Surgimap alternative in 2026 has four realistic categories to choose from: a free open-source desktop tool, enterprise PACS-attached planning suites, an implant-tied AI planning service, and browser-based spine measurement software. This guide compares them honestly — including what each one does not do.

What happened to Surgimap

Surgimap earned its position the honest way: it was free, it handled the measurements spine surgeons actually take every day — Cobb angles, sagittal vertical axis, pelvic incidence and pelvic tilt, lumbar lordosis — and it supported case planning on top of the measurements. Over the years it became the default answer to "what should I measure spine films with?" for residents, fellows, and attendings alike.

Then the door closed. The November 2025 peer-reviewed paper introducing SpineForge Planner noted that platforms such as Surgimap "have discontinued new-user registration." In plain terms: if you already have a working account, that is between you and the vendor — but a new resident, a new hire at your practice, or a clinic standing up a measurement workflow for the first time cannot join. The de facto standard is no longer an option for anyone who doesn't already have it.

That leaves a real gap, because the need didn't go anywhere. Deformity workups, pre-authorization documentation, and routine follow-up imaging all still depend on consistent, repeatable measurements.

What you actually need to replace (the daily measurement workflow)

Before comparing products, it's worth being precise about what the daily workflow actually requires. Most of what made Surgimap useful comes down to five things:

• Calibration and landmarking. Load a standing radiograph, calibrate, and place landmarks quickly enough that measuring doesn't become its own task.
• The core parameter set. Cobb angle, SVA, PI, PT, SS, LL, and PI–LL mismatch at minimum — plus T1 slope, CBVA, and coronal balance if you do deformity work. (See our reference guide to normal spinopelvic parameter values.)
• Consistency. Manual Cobb measurement is known to vary between observers — guided, repeatable landmark placement matters more than any single feature. (More on that in how to measure a Cobb angle.)
• Saved measurement sets. Measurements attached to a case, so you can compare pre-op to post-op and visit to visit instead of re-measuring from scratch.
• A path into documentation. The numbers ultimately end up in clinic notes, operative planning, and prior authorization packets — the less re-typing, the better.

Different alternatives cover different subsets of this list, which is why "what's the best Surgimap replacement?" has no single answer — it depends on which subset you need.

The alternatives, honestly compared

A few honest notes on each. SpineForge Planner is the closest like-for-like replacement for what Surgimap was to most people: a free desktop tool for measuring and planning, and the validation work behind it is real — the published comparison reported intraclass correlation coefficients of 0.89 or higher against Surgimap. If your entire requirement is "a validated free desktop tool for me," it is the straightforward recommendation.

Enterprise PACS-attached suites solve a different problem. If your institution is buying planning as infrastructure — 3D reconstruction, osteotomy simulation, PACS-native everything — that's their category, and no free tool competes there. The trade-off is that they arrive through capital procurement, not a download.

UNiD ASI is planning in service of patient-specific implants. It can be exactly right for deformity cases going down that path, but it is sold through reps and tied to Medtronic's implant ecosystem — it isn't the thing you open to measure Tuesday's follow-up film.

SpineOS is the browser-based option, covered in detail below — including the parts that aren't finished.

Where SpineOS fits (and where it doesn't yet)

SpineOS approaches the Surgimap gap from the browser. You upload a radiograph and measure it — Cobb, SVA, PI, PT, SS, LL, PI–LL mismatch, T1 slope, CBVA, and coronal balance — with guided landmarking that walks you through placement in a consistent order. In-browser AI vertebra detection can propose landmark candidates, and every suggestion is clinician-adjudicated: nothing enters your measurement set until you accept it. Measured parameters get an SRS-Schwab interpretation, and measurement sets persist with the case so you can compare across visits.

The larger bet is what sits around the measurements: the same platform carries patient-reported outcome collection, recovery monitoring, and medical-necessity documentation packets for prior authorization — built only from clinician-accepted findings, and framed as documentation support, never as a promise of coverage approval. If your measurement numbers currently get re-typed into three other documents, that layer is the point.

And here is where it doesn't fit yet, stated plainly. SpineOS is prototype-stage software. It has no FDA clearance — it is decision support, not autonomous diagnosis, and every measurement and AI suggestion is reviewed and owned by the clinician. It has no PACS integration, so images come in by upload rather than flowing from your imaging system. And it is not a 3D osteotomy planning suite — if you need Sectra- or Brainlab-class 3D planning, that category exists for a reason. If a validated, standalone free desktop tool is your whole requirement today, SpineForge is the honest recommendation; SpineOS is worth a look when the browser-based workflow and the documentation layer around it match how your clinic actually works.

Try before any conversation

You shouldn't have to sit through a sales call to find out whether a measurement tool feels right. The SpineOS teaser at /measure/ is free and public: it runs Cobb and SVA measurement entirely in your browser, with no login and nothing uploaded anywhere. If the interaction feels good, the interactive demo shows the full clinician workspace with sample data — and only after that is a conversation worth anyone's time.

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