AWS Identity and Access Management (IAM)
Identity and access management (IAM) software
Identity management software
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What is AWS Identity and Access Management (IAM)
AWS Identity and Access Management (IAM) is a cloud identity and access control service used to manage authentication and authorization for AWS resources. It is primarily used by IT, security, and cloud platform teams to create users, groups, roles, and policies that govern access to services and APIs. IAM is tightly integrated with AWS services and supports fine-grained permissions through JSON-based policies, including temporary credentials via roles. It is commonly implemented as the foundational access layer for AWS accounts and multi-account environments.
Deep AWS service integration
IAM integrates natively with AWS services and the AWS API surface, enabling consistent authorization across infrastructure, data, and application services. Many AWS features and managed services rely on IAM roles and policies as their primary access mechanism. This reduces the need for separate connectors or agents to control access within AWS. It also supports service-to-service access patterns through roles and instance/task profiles.
Granular policy-based authorization
IAM uses policy documents to define permissions at a detailed level, including actions, resources, and conditional context. Organizations can implement least-privilege access models using managed policies, inline policies, permission boundaries, and service control patterns in multi-account setups. The model supports temporary credentials through role assumption, which helps reduce long-lived key usage. Policy evaluation behavior is well-defined and consistent across AWS services.
Mature operational tooling
IAM includes capabilities such as access key management, MFA support, password policies, and credential reports for account hygiene. It provides policy simulation tools to test effective permissions and troubleshoot access decisions. Integration with AWS logging and monitoring services enables auditing of authentication and authorization events. These features support day-to-day administration and compliance workflows for AWS environments.
AWS-centric identity scope
IAM primarily governs access to AWS resources and does not function as a full enterprise identity provider for broad SaaS and on-prem application access. For workforce SSO, lifecycle management, and cross-application provisioning, organizations often need additional identity services or third-party tooling. IAM users are typically not ideal as the primary identity store for large employee populations. This can increase architectural complexity in hybrid identity designs.
Policy complexity and risk
Fine-grained policies can become difficult to design, review, and maintain at scale, especially across many accounts and teams. Misconfigurations (for example, overly broad actions or wildcard resources) can lead to excessive permissions. Understanding effective access often requires combining multiple constructs such as roles, resource policies, permission boundaries, and organization-level controls. Governance typically requires strong standards and continuous review.
Limited built-in lifecycle automation
IAM provides core primitives for users, groups, roles, and access keys, but it does not provide full HR-driven identity lifecycle workflows out of the box. Automated joiner/mover/leaver processes, access reviews, and provisioning to non-AWS targets generally require additional services or external identity governance tools. Even within AWS, large-scale access management often depends on standardized role patterns and automation pipelines. This can add implementation effort for organizations seeking turnkey identity operations.
Plan & Pricing
Pricing model: Pay-as-you-go (usage-based)
Free features (no additional charge, per AWS official docs): IAM core features (IAM, IAM Identity Center, AWS STS) and several Access Analyzer capabilities (external access analysis, policy validation, policy generation).
Paid features & official rates (AWS IAM Access Analyzer):
- Internal access analyzer — $9.00 per AWS resource monitored, per Region, per month. (charges occur once during setup and then monthly).
- Unused access analyzer — $0.20 per IAM role or IAM user, per month (IAM roles/users are global; enable one analyzer per partition).
- Custom policy checks — $0.0020 per IAM Access Analyzer API call (per custom policy check).
Billing notes & examples:
- AWS provides pricing examples on the IAM Access Analyzer pricing page (e.g., $9.00 * resources; $0.20 * number of IAM roles/users; $0.0020 * API calls) to illustrate monthly costs.
- External access analysis, policy validation, and policy generation are explicitly provided at no additional charge.
Discounts / assistance: Use AWS Pricing Calculator or contact AWS for personalized pricing/discounts (consolidated billing, enterprise agreements, etc.).
Seller details
Amazon Web Services, Inc.
Seattle, Washington, USA
2006
Subsidiary
https://aws.amazon.com/
https://x.com/awscloud
https://www.linkedin.com/company/amazon-web-services/
