Madison Startups to Watch in 2027: Verified Companies in Health Data, Sleep AI, Rewards Apps, Rental Search and Biotech
Madison, Wisconsin, is a state capital and a university city, and its startups show it: many of them sell to hospitals, clinics and drug developers, and several grew out of the University of Wisconsin-Madison. The 2026 version of this article mixed real startups with companies that big corporations have since bought, an advocacy group, a golf club described as a tech company, two names we could not find at all, and growth figures with no source. For this 2027 edition we checked every company again in November 2026 on its own website: that it still operates, that it gives a Madison or Madison-area address (Middleton counts here) in its contact, legal or privacy pages or in its own press release, what it actually sells, and what it announced itself.
Quick answer: the Madison startups and scaleups to watch in 2027 are Redox (healthcare data exchange), EnsoData (AI for sleep diagnostics), Fetch (the shopping rewards app), Rentable (apartment search), Moxe Health (clinical data exchange between payers and providers), Imbed Biosciences (wound care), Voximetry (dosimetry for radiopharmaceutical cancer therapy) and InvivoSciences (heart tissue models for drug testing). Founders get support from gener8tor, StartingBlock, UW-Madison's Wisconsin Entrepreneurship Hub and the state's Wisconsin Investment Fund. Exact Sciences and Nimble Therapeutics, both on the old list, now belong to Abbott and AbbVie.
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Why Madison Matters for Founders in 2027
Three patterns stand out in the companies below. The first is health: Redox, EnsoData and Moxe Health all sell software to hospitals, clinics or insurers, and Imbed Biosciences, Voximetry and InvivoSciences work in medtech and drug development. The second is the university: UW-Madison research and graduates sit behind much of the scene, and the university now runs its startup support from one Wisconsin Entrepreneurship Hub. The third is consumer apps that started small at home and went national: Fetch and Rentable both still give a Madison address. For a first-time founder, the easiest ways in are StartingBlock, a gBETA Madison cohort or the university hub.
To compare Madison with other places, read our guide to the best startup cities in North America, or look at the bigger Midwest scene a few hours away in Chicago startups to watch.
Madison Startups to Watch in 2027 Compared
Sources: each company's official website, its contact, legal or privacy pages and its own press releases, checked 7 November 2026.
The Madison Startups to Watch in 2027
1. Redox: the plumbing of healthcare data
Redox runs a data interoperability platform and connection network that lets hospitals, insurers, health tech vendors, electronic health record systems and life sciences companies exchange patient data. Its company page lists more than 12,200 connected healthcare organizations, more than 14,000 live and installing integrations, 95% of the top hospitals in the US News ranking, and more than 20 billion healthcare data transactions in the past 12 months. Its website gives 25 West Main Street in Madison as its address.
Lesson for founders: Redox sells to the health tech companies that need to plug into hospital systems, not to the hospitals alone. Every new connection makes the network more useful for the next customer.
2. EnsoData: AI that reads sleep studies
EnsoData builds AI for sleep medicine. Its products cover the whole path from test to treatment: EnsoHST, a multi-night home sleep test; EnsoSleep, AI-assisted sleep scoring and analysis; EnsoHub, one place to review AI-scored studies; and Therapy Track. Its homepage says it holds four FDA clearances and that more than 500 sleep clinics use it. Its address is 10 E Doty Street in Madison.
Lesson for founders: EnsoData started with one slow, manual job, scoring sleep studies, and then built the test and the follow-up around it. Automate the task professionals hate most, then grow along their workflow.
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3. Fetch: a rewards app with millions of users
Fetch is a rewards app: users scan shopping receipts, play games and shop online, and turn the points into gift cards. Its homepage counts more than 13 million monthly earners and more than $1 billion in rewards redeemed. Its privacy policy and terms give Fetch Rewards, LLC at 1050 E. Washington Avenue in Madison, and its careers page lists workspaces in Madison, Chicago, Birmingham and Boston. Wes Schroll leads it as chief executive.
Lesson for founders: Fetch gives shoppers something for a receipt they would throw away and sells the attention to brands. Look for a habit people already have and make it pay them.
4. Rentable: apartment search built in Madison
Rentable is an apartment search website and app. Its about page says three childhood friends, Alec Slocum, Adam Olien and Chad Aldous, founded it in 2012 in their hometown of Madison because apartment hunting was painful, and that more than half of Madison's renters used it in the months after launch. It now helps millions of renters every month with a team of more than 50, and its website still gives a Madison PO box.
Lesson for founders: Rentable proved its product in one college town before it expanded. Win your home market so clearly that the numbers convince investors to fund the next city.
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5. Moxe Health: data exchange between insurers and hospitals
Moxe Health connects health plans and health systems so they can exchange clinical data securely: release of information for providers, clinical data exchange for payers, and a clinical data clearinghouse for partners. Its homepage headline says it was named number one Best in KLAS for payer-provider data exchange. Its website lists offices at 202 State Street in Madison and in Boston.
Lesson for founders: Moxe works in the gap between two large parties that both need the same records. Products that remove friction between buyers and sellers in a regulated market can sell to both sides.
6. Imbed Biosciences: wound care with silver and gallium
Imbed Biosciences makes thin wound care matrices under the SAMatrix name: Microlyte for chronic wounds, Pelashield for burns, Surgaflex for surgical wounds, PainGuard versions with lidocaine, and Microlyte VET for animals. Its site says it is registered with the US FDA as a medical device manufacturer and runs an ISO 13485:2016 certified quality system. In its release of 1 October 2026, datelined Middleton, it announced that a safety study of its DualGuard silver-gallium matrix is registered on ClinicalTrials.gov.
Lesson for founders: Imbed turned one material platform into several products for different wounds and even for vets. One core technology can serve several markets if you package it for each one.
7. Voximetry: personal dosing for cancer radiation therapy
Voximetry provides dosimetry for radiopharmaceutical therapy, a cancer treatment that delivers radiation through drugs: it works out how much radiation each patient's tumour and organs receive. It offers this as a service for clinics and clinical trials, plus Torch, its GPU-accelerated dose software. Its news page lists a 28 May 2026 announcement with Siemens Healthineers to bring integrated dosimetry into clinical practice, and in September 2025 it appointed Andreas Schulte as CEO. Its address is 7800 Discovery Drive in Middleton, next to Madison, and its team includes a UW-Madison medical physics professor.
Lesson for founders: Voximetry sells its expertise as a service first, so clinics do not need to hire specialists or install software. If buyers lack the staff to use your product, run it for them.
8. InvivoSciences: heart tissue in a dish for drug testing
InvivoSciences calls itself a precision medicine company. It grows small 3D heart tissues from patient-derived stem cells, including NuHeart, an iPSC-derived micro-heart tissue, and uses them to test the safety and effect of drug candidates before human trials. Its focus is heart failure, including rare genetic forms and heart damage caused by cancer therapy. Its contact page gives 510 Charmany Drive in Madison.
Lesson for founders: InvivoSciences sells a way to fail earlier and cheaper. In drug development, a tool that saves a late-stage failure is worth a lot.
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Where Madison Startups Get Support
- gener8tor: the accelerator is headquartered in Madison and runs programmes in more than 40 locations. Its gener8tor Wisconsin investment accelerator invests $100,000 for 7.5% equity on a SAFE in a 12-week programme for Wisconsin startups, and gBETA Madison is a free seven-week programme for up to five early-stage companies with local roots in Madison.
- StartingBlock Madison: a nonprofit startup hub with 50,000 square feet of coworking space at 821 E Washington Avenue in the Capitol East neighbourhood, with programmes such as Level Set, Next Level, Madworks, the Wisconsin Builders Residency and a veterans cohort.
- Wisconsin Entrepreneurship Hub (UW-Madison): the university's entrepreneurship centre at 1403 University Avenue, with programmes such as the Badger Tech Foundry. The old Discovery to Product (D2P) website now leads here.
- Wisconsin Investment Fund (WEDC): a state venture fund that invests through private fund managers. WEDC's page says it starts with $50 million from the US Treasury's State Small Business Credit Initiative, matched at least one-to-one by the managers, who include HealthX Ventures, Clarevia Ventures, Serra Ventures and NVNG Ventures.
- For women founders: The Doyenne Group, a Wisconsin support organisation for women entrepreneurs, has announced its closure after 14 years. Its site points founders to She Stands Tall Forward, WWBIC and the Wisconsin Small Business Development Center.
Women founders can also look at the grants for female entrepreneurs in North America and the accelerators for female entrepreneurs in our guides.
What Changed Since the 2026 List
Of the ten names in the old list, only Moxe Health and InvivoSciences stay. The others left for these reasons:
- Exact Sciences: the cancer test maker is still in Madison, but its own website now says "Exact Sciences is now Abbott". It is part of a global healthcare group, not a startup.
- Nimble Therapeutics: AbbVie announced on 23 January 2025 that it had completed the acquisition, so Nimble is now part of AbbVie.
- FUJIFILM Cellular Dynamics: still based in Madison, founded in 2004 by stem cell pioneer Dr. James Thomson, but it is part of FUJIFILM, not a startup.
- EatStreet: its website blocks automated checks, so we could not confirm its address and status on the official site.
- RENEW Wisconsin: a clean energy advocacy organisation, not a startup.
- Vibez Golf Club: a real golf community founded by UW-Madison alumni, but not the augmented reality golf technology company the old article described.
- Telematic and MyCell Technology: we could not identify which companies the old article meant.
- Statistics removed: "startup investments increased by 40%", a 20.3% grocery delivery growth figure and a 95% test accuracy claim had no source we could check.
Which Madison Company Should You Learn From?
- You build health software: study Redox and Moxe Health, which sit between hospitals, insurers and vendors.
- You build AI for clinicians: study EnsoData and how it collected FDA clearances product by product.
- You build a consumer app: study Fetch and Rentable, which both proved their product in Madison first.
- You build medtech or biotech: study Imbed Biosciences, Voximetry and InvivoSciences.
How Founders Use Madison's Startup Scene
Look at how these companies grew: from university research, from a local test market, or by selling to one part of the health system. If you are raising, compare the Wisconsin Investment Fund managers with the funds in our guides to early-stage VCs in North America and angel investor groups in North America, and test your pitch at the startup competitions in North America.
Meet your sector at the healthtech startup events, medtech startup events, biotech startup events and female entrepreneurship events. Comparing Midwest cities? Other scenes in our series are Columbus startups to watch, Cleveland startups to watch, Kansas City startups to watch, Omaha startups to watch and Lincoln startups to watch. For a very different scene, see Cairo startups to watch.
Before you copy any of these business models, test them with real customers, and start marketing early: list your startup in the F/MS marketing directories, publish your startup press release, and write about your product with the F/MS AI SEO Tool or the AI SEO Blog so customers, investors and AI assistants can find you.
FAQ About Madison Startups to Watch in 2027
Which Madison startups should I watch in 2027?
Our verified list: Redox, EnsoData, Fetch, Rentable, Moxe Health, Imbed Biosciences, Voximetry and InvivoSciences. Each still operates and gives a Madison or Madison-area address on its own website or in its own press release, checked in November 2026.
Which sectors are strongest in Madison?
Health: health data (Redox, Moxe Health), AI for clinicians (EnsoData), medtech (Imbed Biosciences, Voximetry) and drug development (InvivoSciences). Consumer apps such as Fetch and Rentable are the other big group.
Is Exact Sciences still a Madison startup?
No. Its own website now says "Exact Sciences is now Abbott", so it is part of Abbott, a global healthcare group, even though it keeps its Madison address.
What happened to Nimble Therapeutics?
AbbVie completed its acquisition of Nimble Therapeutics in January 2025, so Nimble is now part of AbbVie.
Does this list include Middleton?
Yes. Imbed Biosciences and Voximetry are in Middleton, which borders Madison, so we count the Madison area.
Does gener8tor run programmes in Madison?
Yes. gener8tor is headquartered in Madison. Its gener8tor Wisconsin programme invests $100,000 for 7.5% equity on a SAFE over 12 weeks, and gBETA Madison is a free seven-week programme for local early-stage startups.
Where can startups work in Madison?
StartingBlock Madison runs a 50,000 square foot startup hub on East Washington Avenue, and UW-Madison's Wisconsin Entrepreneurship Hub supports students, staff and alumni.
Is there public venture money for Wisconsin startups?
Yes. WEDC's Wisconsin Investment Fund invests through private managers, starting with $50 million from the US Treasury matched at least one-to-one by those managers.
Where can women founders in Madison get support?
The Doyenne Group has announced its closure; its site points women founders to She Stands Tall Forward, WWBIC and the Wisconsin Small Business Development Center. gener8tor and StartingBlock are open to all founders.
Where can I get a backlink by writing about my startup?
You can publish a guest post in one of the Fe/male Switch startup blogs, which rank in Google and in AI tools. Get a quality backlink.
About the Author
Violetta Bonenkamp, also known as MeanCEO, is an experienced startup founder with an impressive educational background including an MBA and four other higher education degrees. She has over 20 years of work experience across multiple countries, including 5 years as a solopreneur and serial entrepreneur. Throughout her startup experience she has applied for multiple startup grants at the EU level, in the Netherlands and Malta, and her startups received quite a few of those. She’s been living, studying and working in many countries around the globe and her extensive multicultural experience has influenced her immensely.
