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Splunk vs Upstash

Splunk logo

Splunk

Software

Turn Data Into Doing

From
Free
Rated
-
Full reviewWebsite
Upstash logo

Upstash

Software

Serverless data for modern developers

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: Splunk no prices are published on any plan; every model requires contacting sales for an estimate; Upstash hTTP-based REST API only, no TCP connections means higher latency than self-hosted or connection-pooled Redis
  • They diverge on capability: Splunk covers Log aggregation, Upstash covers Serverless Redis.

Where they differ

Only the attributes on which Splunk and Upstash actually diverge.

Attributes where Splunk and Upstash differ
AttributeSplunkUpstash
Pricing modelusage-basedUnknown
PlatformsWeb, ApiREST API, Node.js, Python, Go, Rust, Vercel Edge, Cloudflare Workers, AWS Lambda
Founded20032020

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

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 Splunk

  • Log aggregation
  • Real-time monitoring
  • Data visualization
  • Full-text search
  • Custom dashboards
  • Alert management
  • Anomaly detection
  • Log parsing

Only in Upstash

  • Serverless Redis
  • Serverless Kafka
  • QStash
  • Global Replication
  • REST API
  • Edge Functions Support
  • Rate Limiting
  • Caching

Both cover

  • Web support
  • Api support

What people use each for

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

Splunk

  • Log search and analysis across infrastructurenot Upstash
  • SIEM, SOAR and UEBA for a security operations teamnot Upstash
  • Application performance and infrastructure monitoringnot Upstash
  • Cloud, private cloud or on-premises deploymentnot Upstash

Upstash

  • Cachingnot Splunk
  • Session storagenot Splunk
  • Real-time messagingnot Splunk
  • Rate limitingnot Splunk
  • Serverless backendsnot Splunk

Where each one falls short

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

Splunk

  • No prices are published on any plan; every model requires contacting sales for an estimate
  • Three separate pricing models, workload, ingest and entity, so the same deployment costs different amounts depending on which was signed
  • Ingest pricing bills on data volume, so cost tracks how much you log rather than how much value you get from it
  • Security, observability and platform are priced separately

Upstash

  • HTTP-based REST API only, no TCP connections means higher latency than self-hosted or connection-pooled Redis
  • Rate limiting occurs when traffic exceeds configured budget cap or request limits
  • Kafka service discontinued in March 2025, requiring migration to Upstash Workflow or alternatives
  • Limited Redis feature support compared to self-hosted Redis or Redis Cloud
  • High-request-volume workloads can accumulate significant costs due to per-request pricing model

Pricing, plan by plan

Splunk

Free
  • FreeFree
    • Log aggregation
    • Real-time monitoring
    • Data visualization

Upstash

Free
  • FreeFree
    • 256 MB data
    • 500K commands per month
    • 10 GB bandwidth
  • Pay-as-you-go$0.2/per 100K commands
    • Per-request billing
    • Storage at $0.25/GB
    • Unlimited commands
  • Fixed Plan$10/month
    • 250 MB Redis
    • Predictable pricing
    • Global replication available at higher tiers

Which should you pick?

Choose Splunk if

  • You need log aggregation.
  • You want to start without paying.
  • You work on Web, Api.
  • You also want real-time monitoring.
Splunk review

Choose Upstash if

  • You need serverless redis.
  • You want to start without paying.
  • You work on REST API, Node.js, Python, Go, Rust, Vercel Edge, Cloudflare Workers, AWS Lambda.
  • You also want serverless kafka.
Upstash review

Questions people ask

Is Splunk or Upstash better?
Neither clearly leads. Splunk starts at Free and Upstash at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Splunk or Upstash?
Splunk starts at Free and Upstash at Free.
Does Splunk or Upstash run on more platforms?
Splunk runs on Web, Api. Upstash runs on REST API, Node.js, Python, Go, Rust, Vercel Edge, Cloudflare Workers, AWS Lambda.
Can I use Splunk for free?
Both have a free tier, so you can try either at no cost before committing.
What is Splunk best used for?
Splunk is most often used for log search and analysis across infrastructure, siem, soar and ueba for a security operations team, application performance and infrastructure monitoring, cloud, private cloud or on-premises deployment. Of those, log search and analysis across infrastructure and siem, soar and ueba for a security operations team are not what Upstash is typically brought in for.
What can Splunk do that Upstash cannot?
Splunk covers Log aggregation, Real-time monitoring, Data visualization, Full-text search. Upstash covers Serverless Redis, Serverless Kafka, QStash, Global Replication. Both handle Web support, Api support.

Answered from the vendors’ own pages

Upstash: Does Upstash have a free tier?

Yes. The free tier provides 256 MB of data and 500,000 commands per month with 10 GB of bandwidth in a single region, no credit card required.

Source
Upstash: How does Upstash work with edge platforms like Vercel and Cloudflare Workers?

Upstash uses a REST API instead of TCP connections, enabling it to work from Vercel Edge, Cloudflare Workers, and AWS Lambda without persistent connections or connection pooling.

Source
Upstash: What programming languages are supported?

Upstash provides native SDKs for Python, Node.js, Go, and Rust. Java, C#, and PHP developers can use the REST API or community libraries.

Source
Upstash: Is Upstash Kafka still available?

No. Upstash Kafka was deprecated on September 11, 2024 and fully discontinued on March 11, 2025. Upstash Workflow is now recommended for durable serverless messaging and task queuing.

Source
Upstash: How is Upstash pricing structured?

Upstash uses per-request pricing at $0.20 per 100K commands for Redis, $0.25/GB for storage, and $0.40 per 100K requests for Vector database. Idle applications cost nothing.

Source
Upstash: Can Upstash be used with AWS Lambda?

Yes. Upstash works with AWS Lambda via its REST API, eliminating the need for connection pooling and making it ideal for stateless serverless functions.

Source
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