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Automation Integration · head to head

RudderStack vs Valkey

RudderStack logo

RudderStack

Automation Integration

The open-source customer data platform

From
Free
Rated
-
Full reviewWebsite
Valkey logo

Valkey

Databases

Open-source in-memory data store forked from Redis

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: RudderStack on the free plan data processing stops after a second consecutive overage rather than being billed, so exceeding 250,000 events twice breaks the pipeline; Valkey younger project, so its track record is short even though the codebase is not
  • They diverge on capability: RudderStack covers Data collection, Valkey covers Redis-compatible.
  • Prices and features above were last checked on 30 August 2026.

Where they differ

Only the attributes on which RudderStack and Valkey actually diverge.

Attributes where RudderStack and Valkey differ
AttributeRudderStackValkey
Pricing modelfreemiumOpen source, no licence fee; managed cloud billed separately
PlatformsWeb, Self-hostedLinux, macOS, Docker, Self-hosted
CategoryAutomation IntegrationDatabases
Founded2018Unknown

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

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 RudderStack

  • Data collection
  • Event tracking
  • Audience segmentation
  • Warehouse ingestion
  • Real-time sync
  • Data transformation
  • Privacy controls
  • 200+ destinations

Only in Valkey

  • Redis-compatible
  • BSD licensed
  • Rich data structures
  • Replication and persistence

What people use each for

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

RudderStack

  • Collecting event data from apps and websites and routing it to warehouses and toolsnot Valkey
  • Building a warehouse first customer data pipelinenot Valkey

Valkey

  • Continuing on a permissively licensed in-memory store after the Redis licence changenot RudderStack
  • Caching and session storage where a foundation-governed project is a procurement requirementnot RudderStack
  • Migrating from Redis without rewriting application codenot RudderStack

Where each one falls short

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

RudderStack

  • On the free plan data processing stops after a second consecutive overage rather than being billed, so exceeding 250,000 events twice breaks the pipeline
  • The free plan allows 250,000 events a month
  • Growth starts at $265 a month for 1 million events, with volume sold in tiers up to 25 million
  • Overage is charged as the gap to the next tier's price rather than per event, so a small excess costs a full tier step

Valkey

  • Younger project, so its track record is short even though the codebase is not
  • Divergence from Redis grows over time, so compatibility is strongest near the fork point and weakens as both evolve
  • Ecosystem tooling and documentation still frequently assume Redis, leaving translation work

Pricing, plan by plan

RudderStack

Free
  • FreeFree
    • 250K events per month
    • 16 SDK sources
    • 200+ cloud destinations
  • Growth$265/month
    • 1 million events per month (up to 25 million available)
    • Unlimited team members
    • Tracking plans
  • Enterprise$null/mo
    • 5-minute warehouse sync
    • Unlimited transformations
    • Access to Profiles & Data Apps

Valkey

Free
  • ValkeyFree
    • Full functionality
    • Self-hosted
    • No usage limits

Which should you pick?

Choose RudderStack if

  • You need data collection.
  • You want to start without paying.
  • You work on Web, Self-hosted.
  • You also want event tracking.
RudderStack review

Choose Valkey if

  • You need redis-compatible.
  • You want to start without paying.
  • You work on Linux, macOS, Docker, Self-hosted.
  • You also want bsd licensed.
Valkey review

Questions people ask

Is RudderStack or Valkey better?
Neither clearly leads. RudderStack starts at Free and Valkey at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, RudderStack or Valkey?
RudderStack starts at Free and Valkey at Free.
Does RudderStack or Valkey run on more platforms?
RudderStack runs on Web, Self-hosted. Valkey runs on Linux, macOS, Docker, Self-hosted.
Can I use RudderStack for free?
Both have a free tier, so you can try either at no cost before committing.
What is RudderStack best used for?
RudderStack is most often used for collecting event data from apps and websites and routing it to warehouses and tools, building a warehouse first customer data pipeline. Of those, collecting event data from apps and websites and routing it to warehouses and tools and building a warehouse first customer data pipeline are not what Valkey is typically brought in for.
What can RudderStack do that Valkey cannot?
RudderStack covers Data collection, Event tracking, Audience segmentation, Warehouse ingestion. Valkey covers Redis-compatible, BSD licensed, Rich data structures, Replication and persistence.

Answered from the vendors’ own pages

RudderStack: What is RudderStack's free plan limit?

RudderStack's free plan includes 250K events per month with 16 SDK sources, 200+ cloud destinations, warehouse destinations, and Reverse ETL at no cost.

Source
Valkey: Is Valkey free?

Yes, BSD-licensed open source under the Linux Foundation.

RudderStack: How much does RudderStack Growth plan cost?

RudderStack Growth plan costs $265 per month with annual billing discount available, providing 1 million events per month (up to 25 million available), unlimited team members, and 2 workspaces.

Source
Valkey: Why does Valkey exist?

Redis changed its licence away from BSD in 2024. Valkey is the community fork continuing under permissive terms, backed by AWS, Google Cloud and Oracle among others.

RudderStack: What happens if I exceed my RudderStack event limit?

On the free plan, data processing stops after your second consecutive overage. Paid plan customers face overage fees calculated as the difference between the next tier's pricing and their current plan.

Source
Valkey: Can I switch from Redis to Valkey?

At the fork point it is drop-in compatible with existing clients and data. The further both projects move from that point, the more you should verify the specific features you use.

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