6 free alternatives to OpenObserve

Simple Observability gives a free plan for one server, with 50 metrics per server, low log volume, and 500,000 log lines per month. It is a hosted monitoring setup with a single agent and a web UI, so it stays simple for small server fleets. Compared with OpenObserve, the main free-tier advantage is that it is not a 14-day trial, so you can keep using it without a time limit. It falls short on breadth, since it is focused on server monitoring rather than a wider observability stack. Switch here if you want a small, always-available free plan for one machine or a tiny estate.

• Beats OpenObserve: No time limit on the free plan
• Falls short: Much narrower observability scope than OpenObserve
• Who should switch: Switch to this if you only need free monitoring for one server and want something you can keep using beyond two weeks.

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Grafana Cloud's free tier includes access to all Grafana Cloud services with usage limits, plus Adaptive Telemetry, AI Assistant, and community support. It also gives 14 days of retention for metrics, logs, traces, profiles, and k6 performance tests, with no credit card required and no charges ever on the free plan. Against OpenObserve, the free tier advantage is that it is a broader hosted observability stack with more product surface area available on the free plan. It falls short on retention depth, since OpenObserve includes 15 months of metrics retention and 30 days for non-metrics data. Switch if you want the broadest hosted free observability entry point.

• Beats OpenObserve: Broader free access across the observability stack
• Falls short: Shorter retention than OpenObserve
• Who should switch: Switch to this if you want a hosted, all-in-one free observability stack with no card and no risk of charges.

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Middleware's free trial includes unlimited data ingestion, unlimited RUM sessions, unlimited synthetic checks, 10 browser test runs, unlimited users, community-based support, and 14-day data retention. That makes it attractive if you want broad feature access during an evaluation window. Compared with OpenObserve, it beats it on trial breadth for active testing, especially around synthetic checks and browser tests. It falls short on card friction, since the free tier does not clearly waive the card requirement, and it is still only a 14-day trial rather than an ongoing free plan. Choose it if you want to stress-test observability workflows with very few usage caps.

• Beats OpenObserve: More generous trial usage caps for testing
• Falls short: Card requirement is unknown and it is still only a short trial
• Who should switch: Switch to this if you need a broad, high-capacity trial for evaluation rather than a longer-lived free tier.

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Amazon CloudWatch's free tier includes 5 GB of logs per month, 1,800 minutes of Live Tail, 10 custom or detailed monitoring metrics, 1 million metrics API requests, 3 custom dashboards, 10 alarm metrics, 100,000 X-Ray traces recorded, 1 million traces retrieved or scanned, 100 canary runs, and more. It is a broad monthly allowance rather than a short trial, and it covers many core AWS monitoring use cases. Compared with OpenObserve, it beats it on the sheer variety of free quotas and on being a continuing monthly allocation. It falls short on user simplicity, since it is an AWS service with a card required and a more cloud-specific setup. Switch if you already live in AWS.

• Beats OpenObserve: Much broader set of free monthly quotas
• Falls short: More AWS-specific and less straightforward than OpenObserve
• Who should switch: Switch to this if your workloads already run on AWS and you want a recurring free allowance instead of a 14-day trial.

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Bleemeo's free tier covers up to 3 servers, with 60-second data resolution, 1 day of data retention, basic dashboards, email notifications, and community support. It is built for small infrastructure setups and personal projects, so the free plan is easier to keep on a permanent basis than a trial. Compared with OpenObserve, it beats it on keeping a free monitoring setup alive for a small server count. It falls short sharply on retention and scope, since OpenObserve gives 15 months of metrics retention and 30 days for non-metrics data, plus a much wider observability feature set. Switch here if you only need lightweight infrastructure monitoring.

• Beats OpenObserve: Ongoing free coverage for up to 3 servers
• Falls short: Far less retention and much narrower observability coverage
• Who should switch: Switch to this if you want simple, small-scale infrastructure monitoring without a trial clock.

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Azure Monitor's free tier includes Azure Activity Logs at no charge, unlimited standard platform metrics, the first 1,000,000 platform metric API calls per month, free ping web tests, and a set of free alert and notification quotas. It is a recurring monthly allowance that fits Azure-heavy environments well. Compared with OpenObserve, it beats it on being an always-on cloud-native option with meaningful free monitoring primitives inside Azure. It falls short on breadth outside the Microsoft stack and requires a card, which makes it less universal than OpenObserve's short trial. Switch if your main workloads are already in Azure and you want free monitoring tied to that environment.

• Beats OpenObserve: Stronger recurring free allowance for Azure-native monitoring
• Falls short: More tied to Azure and less universal than OpenObserve
• Who should switch: Switch to this if your telemetry already lives in Azure and you want a continuing free allowance there.

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