AWS AppConfig
AWS AppConfig lets teams change application behavior in production using feature flags and dynamic configuration, without redeploying code.
What AWS AppConfig is
AWS AppConfig lets teams change application behavior in production using feature flags and dynamic configuration, without redeploying code. Teams can turn on features immediately or release them gradually to selected groups, including fine-grained and high-cardinality segments. It also supports A/B and multivariate tests on live traffic, including tests of feature flags, configurations and user experiences. LLM model settings, parameters and prompts can be managed as dynamic configuration and tested in variants. Configuration data can come from AppConfig’s hosted store, AWS Secrets Manager, Systems Manager Parameter Store or Amazon S3. Deployments can be started through the AWS Management Console, AWS CLI or an SDK, and the service can be used with workloads on EC2, AWS Lambda containers, mobile applications or edge devices. Monitored alarms can trigger rollback when thresholds are breached; named services include Amazon CloudWatch, Datadog and Dynatrace. AWS-authored extensions can send deployment events to EventBridge, SNS or SQS and create or update Atlassian Jira issues when feature flags change. PrivateLink enables private VPC access, and customer-managed AWS KMS keys add encryption for hosted and deployed data. The hosted configuration store has a 2 MB default size limit and a 4 MB maximum. Pricing is usage-based, with charges per configuration request, configuration received and experiment hour.
Good
- Supports gradual feature rollouts to selected groups.
- Enables live A/B and multivariate tests.
- Can roll back changes after monitored alarms breach thresholds.
- Accepts configuration from four listed sources.
- Supports private VPC access through PrivateLink.
Watch out
- Hosted configurations default to a 2 MB limit.
- Hosted configuration size maximum is 4 MB.
- Usage-based charges include requests, configuration receipt and experiment hours.
Who it suits
It suits teams that need to adjust application behavior or test configuration changes while software is running in production. It can be used with workloads on AWS compute, mobile applications and edge devices.
Verdict
AWS AppConfig combines runtime configuration, staged releases and live experiments, with rollback options tied to monitored alarms. Teams should account for its hosted configuration size limits and usage-based billing.
Plans and prices
From AWS AppConfig's own pricing page, checked 4 Oct 2026.
| Plan | Price | What it gives you |
|---|---|---|
| Pay as you go | — | $0.0000002 per configuration request · $0.0008 per configuration received · $0.90 per experiment hour · Usage-based; pay per configuration request, configuration received, and experiment hour. |
The facts
Each one read from AWS AppConfig's own pages, with the date it was checked.
What it does
- Access methods
- Deployments can be started through the AWS Management Console, AWS CLI, or an SDK.checked 4 Oct 2026
- AI configuration
- Teams can manage LLM model settings, parameters, and prompts as dynamic configuration and test variants on live traffic.checked 4 Oct 2026
- Automatic rollback
- AppConfig can roll back configuration changes when monitored alarms breach predefined thresholds; the feature page names Amazon CloudWatch, Datadog, and Dynatrace.checked 4 Oct 2026
- Configuration size limit
- The hosted configuration store has a 2 MB default configuration size limit and a 4 MB maximum.checked 4 Oct 2026
- Configuration sources
- AppConfig can deploy configuration data stored in its hosted store, AWS Secrets Manager, Systems Manager Parameter Store, or Amazon S3.checked 4 Oct 2026
- Encryption
- AppConfig supports customer-managed AWS KMS keys for an additional layer of encryption on hosted and deployed configuration data.checked 4 Oct 2026
- Experimentation
- AppConfig supports A/B and multivariate tests on live traffic, including experiments with feature flags, configurations, and user experiences.checked 4 Oct 2026
- Extensions
- AWS-authored extensions can send deployment events to EventBridge, SNS, or SQS and create or update Atlassian Jira issues when feature flags change.checked 4 Oct 2026
- Gradual rollouts
- Teams can release features instantly or gradually to selected user groups, including fine-grained and high-cardinality segments.checked 4 Oct 2026
- Private connectivity
- AWS AppConfig supports AWS PrivateLink interface endpoints for private access from a VPC without an internet gateway, NAT device, VPN, or Direct Connect connection.checked 4 Oct 2026
- Purpose
- AWS AppConfig lets teams change application behavior in production with feature flags and dynamic configurations without redeploying code.checked 4 Oct 2026
- Supported workloads
- AWS says AppConfig can be used with applications hosted on EC2 instances, AWS Lambda containers, mobile applications, or edge devices.checked 4 Oct 2026
- Use cases
- AWS lists feature flags, runtime operations tuning, and dynamic allow-lists or block-lists as AppConfig use cases.checked 4 Oct 2026
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