Prometheus vs Splunk Pricing (2026)
Compare / Prometheus vs Splunk
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Team size
25 seats

Prometheus vs Splunk

Observability pricing comparison · 2026

Prometheus pricing ranges from $0–$2500/month, while Splunk ranges from $0–$800000/month. These products use different pricing models (Per-seat subscription vs Usage-based (pay per token/image/minute)), so a direct price comparison isn't meaningful — costs depend on usage volume and mix.

Visit
See pricing on each vendor's site
Above-the-fold path — each link opens the vendor's pricing page in a new tab.
Visit Prometheus pricing
Free plan limits → Discount programs →
Visit Splunk pricing
Free plan limits → Discount programs →
Compare
2 products · Observability
Side-by-side · live
Prometheus
Prometheus is the leading open-source systems monitoring and alerting toolkit, originally
verified 13d ago
$20K $60K
View pricing →
Splunk
Splunk pricing is based on custom quotes for Workload, Ingest, and Entity pricing models.
verified 12w ago
$20K $60K
View pricing →
Verdict · Vendr median · year 1
Prometheus saves $40K vs Splunk · 25 seats
Cheapest $20K
Spread 67%
Estimated license cost
at 25 seats
List price × seats. Click a tier below to lock it.
AWS Managed Service for Prometheus
$27K/yr
year 1 license · $90/seat
Usage-based
Custom rates
see vendor pricing for volume tiers
What buyers actually pay
median, annual
Vendr deal-flow data. The real benchmark, not list price.
↓ Lowest median
Median annual
$20K/yr
Vendr · n=3 · limited data
Median annual
$60K/yr
Vendr · n=0 · limited data avg 15% negotiated
REF · 01

Sources & confidence

Every dollar amount and contract clause below traces back to a sourced fact. We don't manufacture composite scores.

Where this data comes from
Vendr · TrustRadius · Reddit · BBB · official docs
Sources 16 sourced facts
15 hidden-cost · Vendr median
Last verified 1w ago
Confidence High confidence
Sources 15 sourced facts
12 hidden-cost · 2 contract · Vendr median
Last verified 2mo ago
Confidence Limited confidence
REF · 02

Plans at a glance

Every tier per product. Lock one to drive the cost row above and reveal a tier-specific outbound CTA.

Tier ladder
Click a tier to lock the cost row to it. Locking surfaces a tier-specific Visit CTA.
REF · 03

Hidden costs

Each cost is severity-ranked, with the dollar range quoted from its source (Vendr, Reddit, TrustRadius, BBB, official docs) — never our estimate.

Beyond the sticker
Severity-ranked, sourced
5 documented
  • Engineering Operational Overhead (Self-Hosted)
    $20,000-$60,000/year in engineering time
    2 sources
  • Managed Service Cost Shock from Scrape Interval Misconfiguration
    4-5x cost increase vs expected
    2 sources
  • Managed Prometheus Expensive at Scale
    5-10x cost vs self-hosted at scale
    3 sources
  • Horizontal Scaling Requires Additional Infrastructure
    10-30% of license costs
    1 source
  • Infrastructure & Server Costs for Self-Hosting
    $150-$500/month
    1 source
5 documented
  • Enterprise Security (ES) Add-on Required for SIEM
    $10,000/year minimum
    2 sources
  • Data Pipeline Tools to Control Ingestion Costs
    20-30% of license costs
    2 sources
  • On-Premise Infrastructure and Storage Costs
    15-25% of license costs
    2 sources
  • Training and Expertise Costs
    5-10% of license costs
    2 sources
  • Cloud Egress Charges When Integrating with Azure/AWS
    $500-$5,000/month
    1 source
REF · 04

Contract terms

The fine print, surfaced. Green = buyer-friendly. Each clause backed by a quoted source.

Prometheus
Splunk
Auto-renewal
✓ No
—
Cancellation
—
—
Commitment
None for self-hosted; managed services (AWS AMP, GCP) are pay-as-you-go
Typically annual contracts
Price escalation
No published schedule for self-hosted; cloud managed service pricing subject to provider changes
Pricing model changes and increases over time - incentive pricing melts away during renewals
Can downgrade
✓ Yes
—
Based on 2 verified sources (Vendr · TrustRadius · BBB)
REF · 05

What users say

Aggregated, with sample sizes. We use whichever review platform has data.

User reviews
TrustRadius · Trustpilot · G2
No public ratings yet
Best for
Teams with DevOps/SRE expertise who want full control and can manage infrastructure overhead
Watch out
High cardinality metrics cause memory exhaustion on a single instance
No public ratings yet
Best for
Testing and small deployments
Watch out
Prohibitively expensive pricing model
Decide
Get a quote from each vendor
Each link opens the vendor's pricing page in a new tab.
Visit Prometheus pricing
Free plan limits → Discount programs →
Visit Splunk pricing
Free plan limits → Discount programs →
License cost is computed from publicly listed plans (real math, list price × seats). Median annual cost is from Vendr's deal flow when available — see source badges. Hidden costs and contract terms each cite their own sources. We do not invent composite scores.
Observability

Prometheus

$0–$2500
/month
6 plans · Free tier
Full pricing breakdown →
VS
Observability

Splunk

$0–$800000
/month
4 plans · Free tier
Full pricing breakdown →
⚖

Different Pricing Models

Direct price comparison isn't meaningful here — Prometheus uses Per-seat subscription pricing while Splunk uses Usage-based (pay per token/image/minute) pricing. Your actual cost will depend on usage volume, team size, or both. Here's each product in its native unit.

Per-seat subscription

Prometheus

$0–$2500 / month
See full Prometheus pricing →
vs
Usage-based (pay per token/image/minute)

Splunk

$0–$800000 / month
See full Splunk pricing →

Prometheus and Splunk both operate in the observability category. This page compares their list pricing.

Plan-by-Plan Pricing

Plan Prometheus Splunk
Self-Hosted (Open Source) Free /month Free /month
Grafana Cloud Free Free /month Custom
Grafana Cloud Pro $19 /month + usage Custom
AWS Managed Service for Prometheus $90 /month (usage-based, ~1B samples) Custom
Google Cloud Managed Service for Prometheus $60 /month (usage-based, ~1B samples) —
Enterprise / Custom (Chronosphere, Sysdig, etc.) Custom —

Cost at Scale

Total cost of ownership — licenses, implementation, and hidden costs included.

Prometheus

12 scenarios
$50
Self-Hosted Small Team (10 services)
$100/month
$400
Self-Hosted Production (High Availability)
$800/month
$0/month
Grafana Cloud Free Tier
See all 12 scenarios →

Splunk

8 scenarios
$1,800
Small Business (1-10GB daily)
$18,000 per year (license only), $20,000 - $56,500 first-year total including implementation and training
$50,000
Medium Enterprise (50GB daily)
$90,000 per year (license), additional 30-50% for infrastructure, storage, and maintenance
$400,000
Large Enterprise (500GB+ daily)
$800,000+ per year including licensing, infrastructure, storage overhead, and operational costs
See all 8 scenarios →

Market Intelligence

Prometheus

Median annual cost
$20,000
Based on
3 deals

Splunk

Median annual cost
$60,000
Average negotiated discount
15%

Hidden Costs

Beyond the sticker price — what catches buyers off guard.

Prometheus 8 hidden costs

high
Engineering Operational Overhead (Self-Hosted) $20,000-$60,000/year in engineering time
critical
Managed Service Cost Shock from Scrape Interval Misconfiguration 4-5x cost increase vs expected
high
Managed Prometheus Expensive at Scale 5-10x cost vs self-hosted at scale
medium
Horizontal Scaling Requires Additional Infrastructure 10-30% of license costs
medium
Infrastructure & Server Costs for Self-Hosting $150-$500/month
See all Prometheus hidden costs →

Splunk 8 hidden costs

critical
Enterprise Security (ES) Add-on Required for SIEM $10,000/year minimum
high
Data Pipeline Tools to Control Ingestion Costs 20-30% of license costs
high
On-Premise Infrastructure and Storage Costs 15-25% of license costs
medium
Training and Expertise Costs 5-10% of license costs
medium
Cloud Egress Charges When Integrating with Azure/AWS $500-$5,000/month
See all Splunk hidden costs →

Contract Terms

Term Prometheus Splunk
Auto-renewal No —
Cancellation — —
Minimum commitment None for self-hosted; managed services (AWS AMP, GCP) are pay-as-you-go Typically annual contracts
Price escalation No published schedule for self-hosted; cloud managed service pricing subject to provider changes Pricing model changes and increases over time - incentive pricing melts away during renewals
Can downgrade Yes —

Continue researching

Prometheus

Splunk

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