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It's a split decision.
Choose InfluxDB when you need a time-series database with cloud, on-premises, or edge deployment options, named client libraries, and usage-priced managed hosting. Choose Prometheus when you want an open-source monitoring system with PromQL, alerting rules, and no software usage fees. InfluxDB Cloud Serverless charges by writes, queries, storage, and outbound transfer; Prometheus leaves server operation to your team. Both can be self-hosted, but they solve different jobs: data platform versus metrics monitoring.
01Side by side
| InfluxDB | Prometheus | |
|---|---|---|
| Pricing model | Serverless metering; enterprise and dedicated plans are custom-priced | Free software; teams operate and provision servers |
| Free tier | InfluxDB 3 Core is free forever; Cloud Serverless has $250 credit | Open source; no seat or usage limits imposed |
| Open source and licence | InfluxDB 3 Core is open source; licence unspecified | All components use the Apache 2 License |
| Self-hosting | Core runs on Linux, Mac, and Docker; Enterprise supports self-managed production | Independent servers use local storage; statically linked Go binaries deploy across environments |
| API and SDKs | Client libraries for Python, JavaScript, Go, C#, and Java | Instrumentation libraries cover major languages; queries use PromQL |
| Integrations | Grafana, data lakes, warehouses, AI/ML pipelines | Hundreds of integrations, including Kubernetes and container managers |
| Deployment model | On-premises, edge, cloud, AWS-managed, or single-tenant cloud | Independently operated servers with local storage |
| Limits and scaling | Claims ingest of millions of series; Enterprise has no service quotas | Pricing lists no usage limits; technical capacity depends on deployment |
InfluxDB Choose InfluxDB if
- Choose InfluxDB if you need edge-to-cloud data continuity.
- Choose InfluxDB if managed hosting with metered pricing fits.
- Choose InfluxDB if cold data should stream to lakes or warehouses.
Prometheus Choose Prometheus if
- Choose Prometheus if you need free, open-source metrics monitoring.
- Choose Prometheus if PromQL alerting and queries fit your workflow.
- Choose Prometheus if independent servers and local storage suit your operations.
02Pricing at real usage
Prometheus is free open-source software. Its pricing page lists no seat or usage limits, but your team operates the servers and supplies their compute and storage. InfluxDB has a free local option: InfluxDB 3 Core is free forever, with no high availability or enterprise security. Cloud Serverless includes $250 in free credit, then charges $0.0025 per MB written, $0.012 per 100 query executions, $0.002 per GB-hour stored, and $0.09 per GB transferred out. Those meters make cost depend on ingest, query volume, retained data, and egress. InfluxDB 3 Enterprise includes a 30-day trial and has custom pricing; Cloud Dedicated is also custom-priced. Amazon Timestream for InfluxDB uses AWS consumption pricing billed to your AWS account. The vendor lists no standard monthly subscription price for these InfluxDB plans.
03API, SDKs and integration
InfluxDB's homepage lists client libraries for Python, JavaScript, Go, C#, and Java, plus integrations with Grafana, data lakes, warehouses, and AI/ML pipelines. It describes real-time analytics and time-series storage, but does not name a query language or API protocol on the homepage. Prometheus uses PromQL to query, correlate, and transform metrics; alerting rules also use PromQL. A separate Alertmanager component handles notifications and silencing. Prometheus provides official and community instrumentation libraries covering most major languages, and hundreds of integrations for extracting metrics from existing systems. Its site specifically describes service discovery and monitoring for Kubernetes and other cloud and container managers. These are different integration patterns: InfluxDB connects stored time-series data to client libraries and downstream data systems, while Prometheus centers instrumentation and metric collection. The Prometheus homepage describes statically linked Go binaries, but neither homepage specifies a CLI workflow.
04Open source, self-hosting and lock-in
Both products can be self-hosted. InfluxDB offers InfluxDB 3 Core for Linux, Mac, and Docker, and lists on-premises and edge deployment alongside cloud. Core is open source, but InfluxData does not identify its license on the published product facts; confirm the license and terms before adopting it. InfluxDB 3 Enterprise targets self-managed production deployments. Prometheus is fully open source under the Apache 2 License. Its servers operate independently and rely on local storage, and its statically linked Go binaries are designed for deployment across environments. InfluxDB describes a cold-data path that streams evicted data to lakes, warehouses, and AI/ML pipelines. Prometheus's homepage describes local storage but no export mechanism. Neither product's stated details define cross-product migration steps or data-format compatibility, so plan and verify those before switching.
Questions people ask
What is Prometheus used for?
Prometheus instruments, collects, stores, and queries metrics for applications, systems, and services. Teams use its PromQL queries for visualization and alert rules; a separate Alertmanager component handles notifications and silencing. It is designed for cloud-native monitoring and integrates with Kubernetes and other container managers.
Which is better for Grafana: InfluxDB or Prometheus?
Both can fit: InfluxDB lists Grafana as an integration, while Prometheus supports queries for visualizations and has a broad integrations ecosystem. Choose based on whether you need a time-series database with managed and edge options or a metrics-monitoring system built around PromQL. The vendor pages do not compare Grafana setup steps.
Can you self-host InfluxDB and Prometheus?
Yes. InfluxDB 3 Core runs on Linux, Mac, and Docker, and InfluxData lists on-premises and edge deployments. Prometheus servers operate independently with local storage, and its statically linked Go binaries are designed to deploy across environments.
Is InfluxDB free, and how does its pricing compare with Prometheus?
InfluxDB 3 Core is free forever, and Cloud Serverless includes $250 in credit before usage-based charges apply. Prometheus is free open-source software with no seat or usage limits imposed. With Prometheus, your team still operates the servers; InfluxDB offers paid managed and enterprise options.