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Inbox Health, based in New Haven, Connecticut, develops a software platform that automates patient billing, payment collection, and support for medical practices and billing companies. The platform streamlines patient financial interactions by simplifying bills, accelerating delivery, and offering multi-channel assistance via phone, text, and chat, serving approximately 3,500 medical practices and over 3.5 million patients. To date, the company has raised over $43 million in total funding, including a $22.5 million Series B round in May 2023 led by Ten Coves Capital. Other notable investors include Commerce Ventures, CT Innovations, and Vertical Venture Partners, supporting its growth which led to its inclusion on the Inc. 5000 list. Inbox Health was founded in 2012 by Blake Walker and Simon Kaluza.
Inbox Health has raised $93.0M across 10 funding rounds.
Inbox Health has raised $93.0M in total across 10 funding rounds.
Inbox Health has raised $93.0M in total across 10 funding rounds.
Inbox Health's investors include Steven Piaker, Commerce Ventures, Connecticut Innovations, Fairview Capital, Healthy Ventures, I2BF Global Ventures, Vertical Venture Partners, Ten Coves Capital, Adverb Ventures, Chloe Sladden, C2 Investment, Catapult Capital.
Inbox Health has raised $93.0M across 10 funding rounds. Most recently, it raised $20.0M Other Equity in September 2025.
Inbox Health is a healthcare technology company that builds an automated patient billing and payments platform, primarily serving medical billing companies, practices, and providers. It addresses the growing challenge of patient accounts receivable (A/R) by delivering personalized, multi-channel billing experiences via email, text, paper mail, voice calls, and AI-powered support, resulting in faster collections, reduced administrative costs, and improved patient satisfaction—users report a 60% increase in collection speeds within the first 60 days.[1][3][4] The platform supports over 3,500 practices and 2.5 million patients nationwide, integrating with popular practice management systems like eClinicalWorks, AdvancedMD, Kareo, and Healthpac to automate tasks such as insurance verification, payment plans, and back-office updates.[2][3][6] Headquartered in New Haven, Connecticut, with 50+ employees, Inbox Health has shown strong growth, earning a spot on the Inc. 5000 list of fastest-growing private companies.[1][3]
Inbox Health was co-founded by Blake Walker (CEO) and Simon Kaluza (CTO), who drew from personal frustrations with the U.S. healthcare billing system's opacity and inefficiencies.[7] Walker observed providers extending services without collecting payments, while Kaluza, a back-end software engineer specializing in insurance processing, encountered incomprehensible bills during his family member's terminal illness care, highlighting the lack of patient-focused tools amid insurance-heavy industry standards.[7] The idea emerged to prioritize empathetic patient experiences for billers serving independent practitioners. Early traction built on this foundation, onboarding over 1,500 practices initially and scaling to 3,500+ today, with pivotal recognition via the Inc. 5000 listing.[1][3][7]
Inbox Health stands out in healthcare revenue cycle management (RCM) through these key features:
Inbox Health rides the wave of AI-driven healthcare automation amid rising patient A/R challenges, opaque billing, and demands for patient-centered experiences in a fragmented U.S. system reliant on third-party billers.[1][3][7] Timing aligns with post-pandemic RCM pressures, where unanswered billing questions delay payments; their AI cuts response times to seconds, outperforming human agents in cost, patience, and detail.[2] Market forces like EHR integrations and multi-channel preferences favor them, influencing the ecosystem by empowering billers to serve independent practices efficiently—over 2 million patients now benefit, accelerating industry shifts toward "patient-first" billing and data-driven tools like AWS sentiment analysis.[3][5][6]
Inbox Health is poised for expansion by deepening AI R&D, targeting more EHR interaction points and predictive features like optimal communication based on insurance data.[2][5] Trends in multimodal AI, regulatory pushes for billing transparency, and RCM digitization will propel growth, potentially doubling practice adoption as collections optimize further. Their influence may evolve from billing specialist to comprehensive patient engagement platform, reinforcing the mission to fix healthcare's broken billing at its source—delivering clearer, faster payments that benefit providers, billers, and patients alike.[3][7]
