GoRules
Every company keeps two copies of its business logic: a document people read and code that runs. They drift. GoRules keeps one copy. Rules read like sentences, live in visual graphs or policy documents, and ship with reviews, releases, and tests. The open-source ZEN engine (MIT, Rust) answers your API, your agents, and your batch jobs in about 10 microseconds. An AI copilot builds and explains rules; people release. Cloud, self-hosted, or embedded.
Bindings for Node.js, Python, Go, Java, Kotlin, C#, Swift, and Rust mean the rules that answer a REST call also run inside a Spark worker, so online and batch decisions never disagree. Expressions render as readable sentences in English, Spanish, or Portuguese. Static analysis catches type errors, unreachable rules, and cross-policy conflicts before anything ships. Branch, test, and promote through dev, staging, and production with approvals, rollback, and an audit trail. SOC 2 Type II, SSO, and a free tier to start.
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Red Hat Decision Manager
Red Hat® Decision Manager is a platform for developing containerized microservices and applications that automate business decisions. Decision Manager includes business rules management, complex event processing, and resource optimization technologies. Organizations can incorporate sophisticated decision logic into line-of-business applications and quickly update underlying business rules as market conditions change. Red Hat® Decision Manager 7 is a powerful, scalable open source business rules management system that includes business resource optimization and complex event processing (CEP) technology. It helps organizations capture business logic and develop applications that automate business decisions. Decision Manager 7 is fully compatible with the Red Hat Application Services portfolio and with Red Hat OpenShift® for deployment in hybrid cloud environments.
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SAS Business Rules Manager
Eliminate the risk of incremental, ad hoc operational decision making by using analytically derived business rules to automate and improve decisions across your organization. SAS Business Rules Manager provides a central rules repository, a common platform for managing rule development and deployment, and workflow automation throughout. Administrators have a single point of control for setting authorization, access and security levels for individual users. An integrated workflow for process customization ensures the traceability and versioning of publishing activity. Granular control of rule capabilities provides role security, ensuring that users are appropriately authorized. Use analytical modeling to derive business rules directly from your operational data and automatically generate rule definitions and vocabularies.
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Leapter
Leapter is an AI-assisted platform for creating, testing, and running business rules and decision logic. Describe rules in natural language and turn them into visual, executable Blueprints that business experts and developers can inspect and refine together. Teams can test scenarios, review changes, and trace how each decision was reached. Approved logic runs deterministically, with no language model in the execution path: the same inputs and logic produce the same outputs. Connect business logic to applications, AI agents, and automation workflows through APIs and MCP, or export it as JavaScript or Python. Use cases include pricing calculations, eligibility checks, underwriting rules, risk scoring, and policy validation. Leapter helps teams keep business logic understandable, testable, and under human control.
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