Device regulatory work runs on precedent more than almost any other corner of life sciences: the whole 510(k) pathway is an argument about what already cleared. This ranks the tools by whether they can actually find that precedent and show you the page. Jurisdiction counts come second.
Device regulatory work runs on comparison. A 510(k) is an argument that your product is substantially equivalent to something FDA already cleared. So the real questions are: which predicate do we cite, and what did FDA accept from the products that cited it before us? Pick the wrong predicate and you get an NSE letter. Over-test to be safe and you've spent six months and real money on studies nobody asked for.
The answers live in clearance letters, decision summaries, and De Novo classification orders: thousands of documents, many of them scanned, none of them written to be compared with each other. Product codes change over time, and the same technology gets described three different ways across five years of clearances. A keyword search can't answer the question you actually have: across the last thirty products like ours, what testing showed up every single time, and what did nobody bother with?
Devices add two more things most tools ignore. FDA recognizes specific ISO and IEC consensus standards, and working out how a standard applies to your form factor takes real reading. And 483s and warning letters in your product area matter here too: they tell you what the agency is worried about before you file.
Facts from public materials as of August 2026, plus what device RA teams tell us about the market in our own conversations.
Rhizome is a focused, AI regulatory coworker, and device precedent is the job it was shaped around: what has your regulator cleared, on what evidence, and what does that mean for your submission. Ask "what predicates have recent AI/ML radiology devices cited, and what testing did FDA require?" and the agents read the actual clearance record (hundreds of documents on a question like that, sometimes thousands) and hand back a synthesized answer where every claim opens to the exact passage of the exact 510(k).
The corpus reaches the parts of device work that fall between departments: clearances, De Novo orders, and PMA records sit alongside recognized consensus standards, 483s, warning letters, and recalls: >45 million documents across >75 health-authority databases in >12 markets as of August 2026, on pace for >150 databases and >25 markets by year end. Every scanned page is processed, which matters more in devices than anywhere else, since so much of the older clearance record is image-only PDF.
Nothing is substantiated from model memory; we benchmark our agents on that discipline specifically. No hallucinations reported in 18 months — a track record, not a guarantee, which is why every citation opens to the page. Free tier, published pricing, and it connects into Claude, ChatGPT, or Copilot over MCP.
Cortellis is the incumbent most often already in the building, and for global regulatory-change tracking across many markets its curated coverage is real, with alerts that buyers consistently credit.
For device precedent specifically it's a weaker fit, and the reason is structural: the product is built on curated summaries of regulations and guidances, and the device pathway's raw material (individual clearance letters and decision summaries) isn't summary-shaped. Device teams end up back in the primary documents anyway. Enterprise custom quote, with startup plus annual fees buyers describe as substantial.
Credit where it's due: IQVIA RI covers regulatory requirements for devices and IVDs (alongside drugs and biologics) across 110+ countries, regions, and international organizations, with cross-country comparison and change alerting. That's broader geographic reach than we have, and if you're registering a device in market number sixty it's exactly the right tool.
What a requirements library can't hold is the decision layer: the clearance record, decision summaries, and testing precedent showing what an authority actually accepted. For device work that layer is most of the value, because the pathway argues from precedent and the rule text alone doesn't carry it. The catalog gives your RA team the requirement and leaves the "so what do we do" call unsupported, which is the part they'd most like evidence for. It's a search-and-filter surface too, so the synthesis stays with you.
Already paid for and instantly askable, and for explaining a pathway concept or drafting text you already trust, genuinely useful. The catch is structural: the clearance record is largely scanned PDF in databases the open web doesn't index well, so a general assistant answers from memory and press coverage: the famous devices, while the thirty products like yours stay invisible. Ask it for predicates and you'll get plausible-looking K-numbers that need checking one by one, which is the failure mode buyers describe: the citation stops surviving the click. Copilot has the tenant version of the problem, in that it keeps returning your own design files when you asked about the outside world.
Keep the assistant. Connect Rhizome over MCP for anything that ends up in a submission.
Device engineering teams are especially prone to this one, and the demo works: scrape some clearances, embed them, ask a question. Then the structural costs land: OCR for the scanned back-catalog, weekly refresh across authorities, product-code drift, and an evaluation harness nobody scoped. A snapshot corpus answers confidently without the clearance from last quarter, and in a predicate argument that gap is the whole risk.
The strategic version: build AI where it differentiates you. Your algorithm, your CAD, your test data — that's IP worth engineering around. Reading the public clearance record isn't; nobody differentiates on it.
The 510(k) database, the De Novo listing, the recognized-standards database, a spreadsheet, and discipline. Everything is public and every citation is by definition real. The cost is that comparison across thirty products is a week of someone's life, so it gets scoped down to five, and the pattern you needed lived in the twenty-five you skipped.