#1
Grafana

Grafana

★★★★★ 4.6 Free / $29+ Free plan

Open-source observability and data visualization platform for creating dashboards from multiple data sources including Prometheus, InfluxDB, Elasticsearch, and more.

dashboardsdata-sourcesalertingannotations
✓ Connects to virtually any data source✓ Beautiful and highly customizable dashboards✓ Open-source with massive community
#2
Kestra

Kestra

★★★★ 4.4 Free / $100+ Free plan

Open-source orchestration platform for building scheduled workflows, data pipelines, and event-driven automations with declarative YAML and 500+ plugins.

workflow-orchestrationschedulingevent-triggersplugins
✓ Open-source with full orchestration capabilities✓ Declarative YAML workflows (GitOps friendly)✓ 500+ plugins for data, cloud, and messaging services
#3

LlamaIndex

★★★★ 4.4 Free / $50+ Free plan

Open-source data orchestration framework connecting LLMs with external data sources for building RAG pipelines, document Q&A, and AI agents.

ragdocument-parsingdata-connectorsai-agents
✓ Best-in-class RAG components✓ Largest connector ecosystem (200+ via LlamaHub)✓ Production-ready prepackaged agents
#4
LangChain

LangChain

★★★★ 4.3 Free / $39+ Free plan

Framework for developing applications powered by language models with chains and agents.

chainsagentsretrievalmemory
✓ Comprehensive framework✓ Large community✓ Many integrations
#5

Evidence

★★★★ 4.3 Free / $49+ Free plan

Open-source BI tool that generates beautiful data reports from SQL and Markdown, deployed as static sites for fast, version-controlled analytics.

sql-reportingmarkdown-pageschartsstatic-deployment
✓ Code-based reports (version controlled)✓ Beautiful output✓ Fast static deployment

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