Policybot is best when you want one searchable library of current and historical payer policies. The site says that library holds 600,000+ policies from 500+ payers, with structured HCPCS and ICD-10 codes, change alerts, and AI summaries. Substrate ARC is best when you want an agent that reviews the encounter against medical-necessity policy, pulls clinical documents, and feeds the evidence into appeals beside the clearinghouse you already use. Among the vendors on this page, Substrate is the only one listed in the Anthropic Connector Directory. Substrate publishes a public claim-status MCP. This check did not find a Policybot directory listing. Policybot's site advertises an MCP server for searching policies and formularies, and docs.policybot.app/mcp responds as an MCP endpoint that requires authorization. This check did not read a public tool list. Start with the Policy Agent.
Comparison
Where Policybot wins
- A single library of current and historical payer policies, at the scale the site publishes
- Structured HCPCS and ICD-10 codes, change alerts, and AI summaries of long policies
- Access by web app, REST API, Snowflake, or the MCP server the site advertises
- Workflows the site names: prior authorization requirements, claim edit rules, and policy text for appeals
Where Substrate wins
- The Policy Agent reviews the encounter against the rule. It does not stop at retrieval
- It pulls clinical documents from the EHR and feeds evidence into appeals
- Policy is used beside claim status and denials, on the clearinghouse you already have
- Anthropic Connector Directory listing and a public claim-status MCP with readable docs
What is public
Policybot is a product of Perceptron Health, Inc. The public site describes a searchable database of current and historical payer policies and states 600,000+ policies, 500+ payers, daily updates, pre-extracted HCPCS and ICD-10 codes, change alerts, and AI summaries. It describes three workflows: policy text for denial appeals, prior authorization requirements, and payer-specific claim edit rules. Access methods on the site are a web app, a REST API, a Snowflake database, and an MCP server for searching policies and formularies. The docs host at docs.policybot.app is password-protected, so this page does not describe API fields that are not on the public marketing site. The site displays SOC 2 Type II and HIPAA badges. No public price is listed.
Substrate AI, Inc. (YC S24) sells Substrate ARC. The Policy Agent reviews an encounter against payer medical-necessity policy (LCD, NCD, and payer coverage rules), pulls clinical documents, and feeds that evidence into appeals. It is not a policy-document library only. It uses policy inside claim status, denials, and appeals, beside the clearinghouse you already run. It does not replace a clearinghouse, EHR, coder, or CDI tool. The policy product page says the agent is live in behavioral health and orthopedics, that the same framework fits any specialty with payer-defined criteria, and that most teams are evaluating claims within the first week after clinical calibration. The same page states coverage across 3,500+ payers for the agent stack. This page does not publish a price, a customer count, or a citation statistic.