Last updated 06-27-2026
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RainPath
RainPath builds software for anatomopathology labs that replaces slow chemical staining workflows and cuts down on administrative busywork. Its virtual staining turns unstained biopsy slides into diagnostic-quality H&E and IHC images in seconds, without toxic reagents. Pathologists get faster, more consistent tissue images while labs spend less on chemicals and equipment.
The company combines optical imaging with deep learning models trained on paired tissue datasets. Its virtual staining covers label-free H&E generation, H&E-to-IHC stain translation, and in-silico multiplex biomarker prediction from standard H&E slides. RainPath was named among the 100 most promising AI startups at Raise Summit 2025 and is part of the Paris Saclay Cancer Cluster.
Beyond staining, RainPath Software automates lab operations: RainPath Bons handles order registration with French health system integrations (INSi, ADRi, eSant??), and RainPath Compte Rendu pre-drafts pathology reports with voice dictation built in. RainPath Voice is a desktop medical dictation app for macOS and Windows that works inside any clinical software. Labs host data on HDS-certified servers in France with GDPR compliance.
Virtual H&E and IHC images from unstained slides in seconds
H&E-to-IHC conversion including Ki-67, ER, PR, and HER2 profiles
Order registration 4x faster with INSi, ADRi, and eSant?? integrations
Report pre-drafting cuts typing time by 80% with bible code pre-selection
RainPath Voice dictation works in any app on macOS and Windows
Hosted on HDS-certified servers in France with end-to-end encryption
Virtual staining eliminates toxic chemical reagents and speeds up tissue imaging.
Lab workflow tools claim 4x faster registration and 80% less report typing time.
RainPath Voice is free during beta and works inside any desktop clinical software.
HDS hosting in France with GDPR compliance suits regulated European healthcare labs.
No public pricing page; lab software requires contacting RainPath for a demo.
RainPath Voice beta availability may change after the free test period ends.
Primary integrations target French health systems (INSi, ADRi, eSant??).
What is RainPath virtual staining?
RainPath virtual staining creates diagnostic-quality digital images from unstained tissue slides using optical scanning and deep learning. RainPath can generate H&E stains, translate H&E slides into IHC profiles like Ki-67, and predict multiplex biomarker expression without chemical reagents.
Does RainPath replace chemical staining entirely?
RainPath positions virtual staining as a faster, cleaner alternative that reduces reagent use and lab processing time. Labs contact RainPath for deployment details rather than buying off-the-shelf licenses from a public pricing page.
Is RainPath Voice free?
Yes. RainPath Voice is free for the entire medical team during the beta test period. It is available as a desktop download for macOS and Windows from voice.rainpath.ai.
Where is RainPath data hosted?
RainPath Bons and all RainPath solutions are hosted in France on certified Health Data Hosting (HDS) servers. Data is encrypted at rest and in transit, and the platform is GDPR compliant.
Does RainPath integrate with existing lab systems?
Yes. RainPath Software integrates with laboratory information systems (LIS) on the market. Deployment includes workflow analysis, secure LIS connection, team training, and ongoing production support.
What platforms does RainPath Voice support?
RainPath Voice runs on macOS and Windows as a desktop app. It inserts dictated text wherever your cursor is active, including LIS software, patient records, web browsers, and word processors.