Serif Health
Payer rate intelligence from transparency files
Our take
Serif Health, a Y Combinator W22 company founded by engineers, does one thing: it turns the enormous, messy machine-readable rate files that more than 200 commercial payers publish each month into clean, queryable data. Customers get it through Signal, a search and benchmarking application, or through REST APIs that push negotiated rates, provider networks, and market benchmarks directly into their own products, including a FindCare API for care navigation tools. Employers check whether they are overpaying, providers benchmark contracts before negotiations, and digital health companies build pricing features on top.
More than 300 companies use the data, and the firm has become a visible voice in transparency policy, responding to federal RFIs with its national dataset. But it remains a seed-stage business with roughly $2.5M raised, facing Turquoise Health's far larger war chest in the same market. For buyers, the calculus is straightforward: excellent, affordable rate data and responsive service from a small team, in exchange for accepting early-stage vendor risk and supplying your own analytical muscle.
What it does
- Ingests machine-readable files from 200+ payers monthly
- Signal platform for rate search and market benchmarks
- REST APIs for embedding rates into products
- FindCare API for provider search by procedure and network
- Reporting and analytics for payer negotiations
Where it's strong
- API-first design makes it the practical choice when you want negotiated-rate data inside your own product rather than another dashboard.
- Serves 300+ companies across employers, providers, plans, and brokers, and completed a SOC 2 Type II audit.
- A small engineering-led team tends to move fast on custom data pulls, which customer testimonials repeatedly credit.
What buyers should weigh
- A seed-stage company with about $2.5M raised carries real vendor viability risk for anything mission critical.
- It sells data infrastructure, not workflow software, so you need your own analysts or engineers to get value.
- It competes directly with the much better funded Turquoise Health; the bet is that its price and API depth outweigh the resource gap.
Latest
In 2025 Serif completed a SOC 2 Type II audit and submitted responses to the federal RFI on prescription drug price transparency drawing on its June 2025 national rate data.
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