# WhichM365

> WhichM365 is a free, independent educational decision guide from Tech Simplified. It helps businesses and advisers understand Microsoft 365 licensing, Microsoft AI readiness, business outcomes, capability boundaries, and useful decision questions. The author, Sly Gittens, is a Microsoft employee acting in a personal capacity. WhichM365 is not a Microsoft product or service and is not sponsored, authorized, or endorsed by Microsoft.

## Start here
- [WhichM365 home](https://whichm365.com/): choose a job-based path across learning, licensing, Microsoft AI, and verified changes.
- [Microsoft 365 License Advisor](https://whichm365.com/license-advisor): answer four focused questions to identify which Microsoft 365 license may fit, then review the recommendation and trade-offs.
- [WhichM365 Decision Agent for Microsoft 365 licensing and Copilot](https://whichm365.com/ask): describe a complex licensing or Copilot question and see a bounded, source-linked WhichM365 decision workflow.
- [Learn center](https://whichm365.com/learn): understand Microsoft 365 by decision, role, product boundary, or business question.
- [Microsoft 365 licensing guide and plan comparisons](https://whichm365.com/compare/): the broad starting point for plan comparisons, plan explanations, and common licensing questions.
- [Microsoft AI prompt library](https://whichm365.com/prompts): practical prompts organized by the problem they help explore.

## Educational decision tools
- [Microsoft AI path chooser](https://whichm365.com/ai-path): start with a job such as drafting, organizational-context work, software development, security operations, enterprise data, or building an agent, then review the closest capability boundary.
- [AI Readiness Navigator](https://whichm365.com/ai-readiness): review six readiness dimensions for one workflow without tenant access, uploads, or stored answers.
- [Independent AI Advisor](https://whichm365.com/ai-value-advisor): answer four guided questions or browse a familiar business outcome, then compare capability fit, evidence, guardrails, alternatives, decision criteria, and useful prompts.
- [Agent Path Guide](https://whichm365.com/agent-path): compare Agent Builder, Copilot Cowork, Copilot Studio, and Microsoft Foundry by ownership, user surface, integration, and operating responsibility.
- [AI Decision Conversation](https://whichm365.com/decision-conversation): create a controlled brief for an internal decision discussion without free text or stored answers.
- [Copilot cost estimator](https://whichm365.com/copilot-cost-estimator): explore seat and usage assumptions locally in the browser.
- [Copilot Credits planner](https://whichm365.com/copilot-credits-planner): combine tenant-level credit estimates across eligible Microsoft workloads and compare published purchase tiers.
- [Microsoft 365 feature reference](https://whichm365.com/feature-reference): find capabilities and identify which plans include them.
- [Microsoft 365 license upgrade ladder](https://whichm365.com/license-upgrade-ladder): understand the capability or organizational trigger that could justify another plan.
- [Licensing challenge](https://whichm365.com/licensing-challenge): test one licensing decision and find what to learn next.

## Guided Learn center
- [Microsoft AI readiness](https://whichm365.com/learn/microsoft-ai-readiness)
- [Copilot Chat vs Microsoft 365 Copilot](https://whichm365.com/learn/copilot-chat-vs-microsoft-365-copilot)
- [Microsoft Copilot and agent comparison: when to leave chat](https://whichm365.com/learn/copilot-chat-microsoft-365-copilot-cowork): compare Copilot Chat, Microsoft 365 Copilot, Cowork, Agent Builder, and Copilot Studio by work context, autonomy, governance, and consumption.
- [M365 Maps and WhichM365: when to use each](https://whichm365.com/learn/m365-maps-vs-whichm365)
- [Microsoft work context or a standalone AI assistant?](https://whichm365.com/learn/microsoft-context-vs-standalone-ai-assistant)
- [Agent Builder, Cowork, Copilot Studio, or Microsoft Foundry](https://whichm365.com/learn/agent-builder-cowork-copilot-studio-foundry)
- [Copilot Studio harnesses: chat, standard, or GitHub](https://whichm365.com/learn/copilot-studio-harnesses): choose a Copilot Studio runtime by work pattern, audience, control boundary, and Copilot Credit considerations.
- [GitHub Copilot product or Copilot Studio harness?](https://whichm365.com/learn/github-copilot-vs-copilot-studio-github-harness): distinguish developer assistance from the similarly named Copilot Studio agent runtime.
- [Copilot Studio or Microsoft Foundry?](https://whichm365.com/learn/copilot-studio-vs-microsoft-foundry): compare low-code agent configuration with a custom Azure AI application and engineering boundary.
- [Which Microsoft Fabric data store should you use?](https://whichm365.com/learn/microsoft-fabric-data-store): compare Lakehouse, Warehouse, Eventhouse, SQL database, and Cosmos DB by workload, data shape, query pattern, latency, and ownership.
- [When should you use Microsoft Security Copilot?](https://whichm365.com/learn/microsoft-security-copilot): decide whether security-specific AI fits the workflow and verify E5 or E7 inclusion, SCU capacity, roles, data, and accountability boundaries.
- [Power Automate, Power Apps, or Copilot Studio](https://whichm365.com/learn/power-automate-power-apps-copilot-studio)
- [How Entra, Intune, and Defender work together](https://whichm365.com/learn/entra-intune-defender-together)
- [Business Premium vs Microsoft 365 E3](https://whichm365.com/learn/business-premium-vs-e3)

## AI decision guides by business problem
- [Browse all business problems in AI Advisor](https://whichm365.com/ai-value-advisor#business-problems)
- [Executive weekly brief](https://whichm365.com/business-outcomes/executive-weekly-brief)
- [Sales conversation preparation](https://whichm365.com/business-outcomes/sales-conversation-preparation)
- [Customer request response](https://whichm365.com/business-outcomes/customer-request-response)
- [Operational performance and variance](https://whichm365.com/business-outcomes/operational-performance-variance)
- [Approved business knowledge](https://whichm365.com/business-outcomes/approved-business-knowledge)
- [Recurring status updates](https://whichm365.com/business-outcomes/recurring-status-updates)
- [Employee policy questions](https://whichm365.com/business-outcomes/employee-policy-questions)
- [Agent estate governance](https://whichm365.com/business-outcomes/agent-estate-governance)

## Licensing comparisons
- [Business Standard vs Business Premium](https://whichm365.com/compare/business-standard-vs-business-premium)
- [Business Premium vs Microsoft 365 E3](https://whichm365.com/compare/business-premium-vs-e3)
- [Microsoft 365 E3 vs E5](https://whichm365.com/compare/microsoft-365-e3-vs-e5)
- [Microsoft 365 E5 vs E7](https://whichm365.com/compare/microsoft-365-e5-vs-e7)
- [Microsoft 365 Copilot licensing and pricing](https://whichm365.com/compare/microsoft-365-copilot-pricing): eligible base plans, the paid seat, included experiences, and separate Cowork and Copilot Credit billing.
- [Office 365 vs Microsoft 365](https://whichm365.com/compare/office-365-vs-microsoft-365)
- [Frontline F1 vs F3](https://whichm365.com/compare/frontline-f1-vs-f3)
- [Microsoft 365 Business 300-user limit](https://whichm365.com/compare/microsoft-365-business-300-user-limit)
- [Copilot Chat vs Microsoft 365 Copilot](https://whichm365.com/compare/copilot-chat-vs-microsoft-365-copilot)
- [Entra ID P1 vs P2](https://whichm365.com/compare/entra-id-p1-vs-p2)
- [Defender for Business vs Defender for Endpoint](https://whichm365.com/compare/defender-for-business-vs-defender-for-endpoint)
- [Intune Plan 1 vs Intune Suite](https://whichm365.com/compare/intune-plan-1-vs-intune-suite)
- [All licensing guides](https://whichm365.com/compare/)

## Plan and quick-answer references
- [Microsoft 365 Business Basic](https://whichm365.com/microsoft-365-business-basic)
- [Microsoft 365 Business Standard](https://whichm365.com/microsoft-365-business-standard)
- [Microsoft 365 Business Premium](https://whichm365.com/microsoft-365-business-premium)
- [Microsoft 365 E3](https://whichm365.com/microsoft-365-e3)
- [Microsoft 365 E5](https://whichm365.com/microsoft-365-e5)
- [Microsoft 365 F3](https://whichm365.com/microsoft-365-f3)
- [Does Business Premium include Intune?](https://whichm365.com/does-business-premium-include-intune)
- [Does Business Premium include Defender?](https://whichm365.com/does-business-premium-include-defender)
- [Does E3 include Copilot?](https://whichm365.com/does-e3-include-copilot)
- [Does E5 include Copilot?](https://whichm365.com/does-e5-include-copilot)
- [Does E3 include Teams?](https://whichm365.com/does-e3-include-teams)

## Sources, freshness, and interpretation
- [About WhichM365 and its sources](https://whichm365.com/about): authorship, editorial method, source policy, scope, and corrections.
- [Verified Microsoft changes](https://whichm365.com/microsoft-365-changes): recent changes with public sources and verification dates.
- [Site updates](https://whichm365.com/updates): material changes to the WhichM365 experience.

Product names, entitlements, prices, availability, and documentation can change. WhichM365 centralizes verification dates and links to relevant public Microsoft sources. Readers should confirm the current position for their tenant, agreement, region, risk, and legal obligations before making a purchase or governance decision.

## What Tech Simplified does and does not do
Tech Simplified delivers training, workshops, enablement sessions, and educational content. It does not provide direct software implementation, managed services, software resale, or deployment projects. WhichM365 provides educational decision support only.