--- title: William Reviews meta\_title: 'William Reviews 2026: Details, Pricing, & Features | G2' meta\_description: Filter reviews by the users' company size, role or industry to find out how William works for a business like yours. date\_modified: '2026-03-10' parent\_category: name: Insurance url: https://www.g2.com/categories/insurance ---

# William Reviews & Product Details

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###### Profile Status

This profile is currently managed by William but has limited features.  
  
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William™ by Certifi is purpose-built premium billing and payment software for health plans and health insurers. Unlike billing modules bundled into core admin platforms, William™ is designed from the ground up to handle the complexity of health plan billing — including ACA marketplace, Medicare Advantage, Medicaid, and commercial lines of business. Built on the Perfect Balance™ accounting architecture, William™ enforces balanced debits and credits at every transaction, virtually eliminating the manual reconciliation work that plagues teams using legacy or core admin billing systems. Key capabilities include: Automated invoice generation, retroactive adjustments, and payment matching Integrated member payment portal (ACH, credit/debit card, retail cash) Configurable delinquency management with automated letter generation Real-time billing data via API for member portals and service teams No-code billing rule configuration — no developer required Integration with upstream enrollment platforms and downstream GL systems via API, flat file, or SSO William™ is PCI, NACHA, SOC2, and HIPAA compliant and is designed to scale to millions of transactions per month.

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Seller
 [Certifi](https://www.g2.com/sellers/certifi)
Discussions
 [William Community](https://www.g2.com/products/william/discuss)
Overview by
 Chad Reinholz

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## William hasn't been reviewed yet

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##### Pricing

Pricing details for this product isn’t currently available. Visit the vendor’s website to learn more.

[
View More Pricing Information
](https://www.g2.com/products/william/pricing)

##### Categories on G2

[Insurance Billing](https://www.g2.com/categories/insurance-billing)

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