Grafana
Grafana Labs · Monitoring & observability
Dashboarding and alerting platform that visualizes metrics, logs and traces from Prometheus, SQL databases and dozens of other data sources
AGPL-3.0-onlyOpen sourceFreemiumSelf-hostedNov 2, 2026
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Langfuse
Langfuse (part of ClickHouse, Inc. since January 2026) · Prompting, evaluation & observability
Open-source LLM observability and evaluation platform: tracing, LLM-as-judge and human evals, prompt management, datasets and cost dashboards, self-hostable or as Langfuse Cloud
MITOpen sourceFreemiumSelf-hostedNov 2, 2026
Slack
Slack Technologies (Salesforce) · Collaboration & communication
Channel-based team messaging platform from Salesforce with threads, huddles, canvases, workflow automation and an extensive bot and app API
ProprietaryFreemiumPaidNov 2, 2026
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