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Logging · head to head

Grafana Loki vs Mezmo

Grafana Loki logo

Grafana Loki

Logging

Log Aggregation for Grafana Stack

From
Free
Rated
-
Full reviewWebsite
Mezmo logo

Mezmo

Logging

Composable Observability Platform (LogDNA)

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: Grafana Loki grafana Cloud Logs Pro plan includes only 30-day retention; retention beyond 30 days requires Enterprise plan with minimum $25,000 annual commitment; Mezmo no pricing tiers or dollar amounts published on pricing page
  • They diverge on capability: Grafana Loki covers Label-based indexing, Mezmo covers AI-powered insights.

Where they differ

Only the attributes on which Grafana Loki and Mezmo actually diverge.

Attributes where Grafana Loki and Mezmo differ
AttributeGrafana LokiMezmo
Pricing modelfreemiumusage-based
PlatformsSelf-hosted (open source), Managed (Grafana Cloud Logs), Enterprise (self-managed with support)Web, Api

Identical on both: starting price (Free), free tier (Yes), user rating (Not yet rated), category (Logging), founded (2014).

What each one covers

Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.

Only in Grafana Loki

  • Label-based indexing
  • LogQL language
  • Cost-effective

Only in Mezmo

  • AI-powered insights
  • Live tailing
  • Custom parsing

Both cover

  • Log aggregation
  • API
  • Webhooks
  • REST
  • Web support
  • Api support

What people use each for

The jobs each tool is most often brought in to do.

Grafana Loki

  • Cost-sensitive organisations deploying Kubernetes and Prometheus ecosystemsnot Mezmo
  • Teams needing index-free log aggregation for high-volume environmentsnot Mezmo

Mezmo

  • Log aggregation and observabilitynot Grafana Loki
  • AI-powered root cause analysisnot Grafana Loki
  • Telemetry pipeline managementnot Grafana Loki

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

Grafana Loki

  • Grafana Cloud Logs Pro plan includes only 30-day retention; retention beyond 30 days requires Enterprise plan with minimum $25,000 annual commitment
  • Open-source version requires self-hosting all infrastructure including storage and scaling

Mezmo

  • No pricing tiers or dollar amounts published on pricing page
  • No named plans available to compare
  • Pricing model not transparently disclosed upfront

Pricing, plan by plan

Grafana Loki

Free

No published plan breakdown. See the Grafana Loki review.

Mezmo

Free
  • FreeFree
    • Log aggregation
    • AI-powered insights
    • Live tailing

Which should you pick?

Choose Grafana Loki if

  • You need label-based indexing.
  • You want to start without paying.
  • You work on Self-hosted (open source), Managed (Grafana Cloud Logs), Enterprise (self-managed with support).
  • You also want logql language.
Grafana Loki review

Choose Mezmo if

  • You need ai-powered insights.
  • You want to start without paying.
  • You work on Web, Api.
  • You also want live tailing.
Mezmo review

Questions people ask

Is Grafana Loki or Mezmo better?
Neither clearly leads. Grafana Loki starts at Free and Mezmo at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Grafana Loki or Mezmo?
Grafana Loki starts at Free and Mezmo at Free.
Does Grafana Loki or Mezmo run on more platforms?
Grafana Loki runs on Self-hosted (open source), Managed (Grafana Cloud Logs), Enterprise (self-managed with support). Mezmo runs on Web, Api.
Can I use Grafana Loki for free?
Both have a free tier, so you can try either at no cost before committing.
What is Grafana Loki best used for?
Grafana Loki is most often used for cost-sensitive organisations deploying kubernetes and prometheus ecosystems, teams needing index-free log aggregation for high-volume environments. Of those, cost-sensitive organisations deploying kubernetes and prometheus ecosystems and teams needing index-free log aggregation for high-volume environments are not what Mezmo is typically brought in for.
What can Grafana Loki do that Mezmo cannot?
Grafana Loki covers Label-based indexing, LogQL language, Cost-effective. Mezmo covers AI-powered insights, Live tailing, Custom parsing. Both handle Log aggregation, API, Webhooks, REST.

Answered from the vendors’ own pages

Grafana Loki: Is there a free tier for Grafana Cloud?

Yes, Grafana Cloud has a Free Forever plan at no cost with no registration required. The free tier is suitable for personal projects and early-stage startups.

Source
Mezmo: How much does Mezmo cost?

Mezmo uses platform-based pricing tied to data volume and retention rather than per-query charges. The company emphasizes 'no AI surcharges' and 'no pay-per-query surprises,' with pricing scaling based on data volume, but specific dollar amounts and named tiers are not published on their pricing page.

Source
Grafana Loki: How long is data retained in Grafana's free plan?

The free tier retains metrics, logs, traces, and profiles for 14 days.

Source
Mezmo: Is there a free trial for Mezmo?

Mezmo offers a free trial available at mezmo.com/trial, allowing users to test the platform before purchasing, with pricing scaling predictably as data volume grows.

Source
Grafana Loki: What is the minimum cost for Grafana Enterprise?

Grafana Enterprise has a minimum annual commitment of 25,000 dollars.

Source
Mezmo: What does Mezmo's platform license include?

All Mezmo plans include telemetry pipeline ingestion, automatic noise reduction for LLM cost efficiency, AI-ready context with event clustering, agentic root cause analysis capabilities, full data control and routing, and role-based access controls, with no extra cost for AI features.

Source
Grafana Loki: Do I need a credit card to use Grafana's free tier?

No, Grafana Cloud's Free Forever plan requires no credit card to get started.

Source
Grafana Loki: How is Grafana Cloud billed?

Grafana Cloud Pro starts at 19 dollars per month with usage-based charges on top. Billing is monthly based on your consumption. Grafana offers automatic volume discounts based on your spending.

Source
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