Editorial take
Why it stands out
Grafana Loki should be positioned as both an OSS logging backend and a gateway into Grafana Cloud Logs, not as a standalone commercial SaaS with its own separate buying motion.
Tool profile
Open-source log aggregation system for large-scale, label-based logging stacks with a strong managed path through Grafana Cloud Logs.
Open-source log aggregation
Grafana Loki deserves a place in the directory because it is one of the clearest default choices for teams building an open-source logging stack around Grafana and Prometheus-era patterns. The official documentation describes Loki as a set of open-source components that can be composed into a fully featured logging stack. That matters because Loki is not just a hosted logs product. It is a real infrastructure layer used by teams that want scalable log aggregation without defaulting to a legacy search-first architecture.
Its pricing story has two parts and needs to be framed carefully. The open-source software itself is free to adopt, while the managed buying motion lives inside Grafana Cloud Logs pricing. Grafana's official plans page currently shows a Free tier with 50 GB ingested per month and 14-day retention, Pro with a $19 per month platform fee plus $0.50 per GB ingested and 30-day retention for logs, and Enterprise as custom with a $25,000 annual minimum commit. That combination makes Loki especially useful for teams who want to start open-source and still keep a credible managed path available later.
Quick fit
Editorial take
Grafana Loki should be positioned as both an OSS logging backend and a gateway into Grafana Cloud Logs, not as a standalone commercial SaaS with its own separate buying motion.
What it does well
Primary use cases
Fit notes
Pricing snapshot
Grafana Loki is open-source software, and managed pricing is sold through Grafana Cloud Logs. Grafana's official plans page currently shows Free at $0 with 50 GB of logs per month, Pro at $19/month platform fee plus $0.50 per GB ingested, and Enterprise as custom with a $25,000 annual minimum commit.

Arcjet
Free planApplication runtime security
Runtime security toolkit for modern applications and AI systems that helps teams enforce quotas, block bots, prevent prompt abuse, and ship app-level protections in code.
Closer to application-runtime security and abuse-prevention tooling than to classic perimeter appliances.