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Databases · head to head

Apache Flink vs ChartMogul

Apache Flink logo

Apache Flink

Databases

Stateful stream processing at scale

From
Free
Rated
-
Full reviewWebsite
ChartMogul logo

ChartMogul

Business Intelligence

Subscription analytics platform

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: Apache Flink genuinely difficult: event time, watermarks and state backends are a real conceptual load before anything works; ChartMogul the free tier stops at $10K MRR, so it lapses precisely as a company starts to matter
  • They diverge on capability: Apache Flink covers Event-time processing, ChartMogul covers MRR Analytics.
  • Prices and features above were last checked on 30 August 2026.

Where they differ

Only the attributes on which Apache Flink and ChartMogul actually diverge.

Attributes where Apache Flink and ChartMogul differ
AttributeApache FlinkChartMogul
Pricing modelOpen source, no licence fee; managed services billed separatelysubscription
PlatformsLinux, Kubernetes, Docker, Self-hostedWeb, Api
CategoryDatabasesBusiness Intelligence
FoundedUnknown2014

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 Apache Flink

  • Event-time processing
  • Exactly-once state
  • Batch and stream
  • SQL interface

Only in ChartMogul

  • MRR Analytics
  • Churn Analysis
  • Cohort Analysis
  • Customer Segmentation
  • Revenue Recognition
  • Stripe
  • Chargebee
  • Recurly

What people use each for

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

Apache Flink

  • Real-time aggregations and dashboards computed over an event streamnot ChartMogul
  • Fraud and anomaly detection where patterns span a time windownot ChartMogul
  • Joining two live streams where events arrive out of ordernot ChartMogul

ChartMogul

  • MRR trackingnot Apache Flink
  • Churn analysisnot Apache Flink
  • Revenue analyticsnot Apache Flink
  • Subscription metricsnot Apache Flink
  • Financial forecastingnot Apache Flink

Where each one falls short

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

Apache Flink

  • Genuinely difficult: event time, watermarks and state backends are a real conceptual load before anything works
  • Operationally heavy — job managers, task managers, checkpoint storage and state size are all yours to run and tune
  • State grows with the workload, and large state changes recovery time and cost significantly
  • Overkill where a scheduled batch job would answer the same question

ChartMogul

  • The free tier stops at $10K MRR, so it lapses precisely as a company starts to matter
  • Starter is capped at 3 team members and a single billing system connection
  • Two-way CRM sync and warehouse integration require the Pro tier
  • Pricing scales with your ARR rather than with usage, so the bill rises as the business grows
  • Enterprise starts at $19,900 a year and is required above $10M ARR

Pricing, plan by plan

Apache Flink

Free
  • Apache FlinkFree
    • Full functionality
    • Self-hosted
    • No usage limits

ChartMogul

Free
  • FreeFree
    • Up to $120K ARR tracked
    • 1 billing source
    • Unlimited team members
  • Starter$59/month
    • $59-$707/month based on ARR
    • Up to $10M ARR tracked
    • 1 billing source
  • Pro$99/month
    • $99-$1,199/month based on ARR
    • Up to $10M ARR tracked
    • 5 billing sources
  • Enterprise$19900/year
    • Custom pricing available
    • Unlimited ARR tracked
    • 15 billing sources

Which should you pick?

Choose Apache Flink if

  • You need event-time processing.
  • You want to start without paying.
  • You work on Linux, Kubernetes, Docker, Self-hosted.
  • You also want exactly-once state.
Apache Flink review

Choose ChartMogul if

  • You need mrr analytics.
  • You want to start without paying.
  • You work on Web, Api.
  • You also want churn analysis.
ChartMogul review

Questions people ask

Is Apache Flink or ChartMogul better?
Neither clearly leads. Apache Flink starts at Free and ChartMogul at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Apache Flink or ChartMogul?
Apache Flink starts at Free and ChartMogul at Free.
Does Apache Flink or ChartMogul run on more platforms?
Apache Flink runs on Linux, Kubernetes, Docker, Self-hosted. ChartMogul runs on Web, Api.
Can I use Apache Flink for free?
Both have a free tier, so you can try either at no cost before committing.
What is Apache Flink best used for?
Apache Flink is most often used for real-time aggregations and dashboards computed over an event stream, fraud and anomaly detection where patterns span a time window, joining two live streams where events arrive out of order. Of those, real-time aggregations and dashboards computed over an event stream and fraud and anomaly detection where patterns span a time window are not what ChartMogul is typically brought in for.
What can Apache Flink do that ChartMogul cannot?
Apache Flink covers Event-time processing, Exactly-once state, Batch and stream, SQL interface. ChartMogul covers MRR Analytics, Churn Analysis, Cohort Analysis, Customer Segmentation.

Answered from the vendors’ own pages

Apache Flink: Is Apache Flink free?

Yes, open source under the Apache Software Foundation. Managed services such as Amazon Managed Service for Apache Flink are billed separately.

ChartMogul: How much does ChartMogul cost for a small SaaS startup?

ChartMogul offers a free plan for companies with up to $120K ARR. Starter plans begin at $59 per month for smaller ARR amounts and scale up to $707 per month, with a 17% discount available for annual commitments. Source: https://chartmogul.com/pricing

Source
Apache Flink: Flink or Kafka?

They are complementary rather than alternatives. Kafka moves and stores events; Flink computes over them with windowing, joins and durable state.

ChartMogul: What are the team member limits on ChartMogul plans?

The Free and Pro plans include unlimited team members, while the Starter plan is limited to 3 team members. Enterprise plans offer unlimited users with custom pricing. Source: https://chartmogul.com/pricing

Source
Apache Flink: What is event-time processing?

Computing based on when an event actually occurred rather than when it arrived. It is what makes results correct when data is late or out of order, and it is the main reason Flink is harder than it looks.

ChartMogul: How many billing sources can each ChartMogul plan integrate?

Free and Starter plans support 1 billing source each. Pro plans increase to 5 billing sources. Enterprise plans support 15 billing sources with custom pricing and unlimited integration capabilities. Source: https://chartmogul.com/pricing

Source
ChartMogul: Does ChartMogul offer an annual payment discount?

Yes, ChartMogul provides a 17% discount when paying annually instead of monthly on Starter and Pro plans. Enterprise customers can discuss custom annual pricing with the sales team. Source: https://chartmogul.com/pricing

Source
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