Softwr

Software · head to head

PostHog vs Upstash

PostHog logo

PostHog

Software

The single platform to analyze, test, observe, and deploy new features

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: PostHog the free tier covers 1M events, 5K web session recordings and 2.5K mobile recordings per month before usage-based billing starts; Upstash hTTP-based REST API only, no TCP connections means higher latency than self-hosted or connection-pooled Redis
  • They diverge on capability: PostHog covers Product analytics, Upstash covers Serverless Redis.

Where they differ

Only the attributes on which PostHog and Upstash actually diverge.

Attributes where PostHog and Upstash differ
AttributePostHogUpstash
Pricing modelusage-basedUnknown
PlatformsWeb, Ios, Android, ApiREST API, Node.js, Python, Go, Rust, Vercel Edge, Cloudflare Workers, AWS Lambda

Identical on both: starting price (Free), free tier (Yes), user rating (Not yet rated), category (Unknown), founded (2020).

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 PostHog

  • Product analytics
  • Session recording
  • Feature flags
  • A/B testing
  • Heatmaps
  • SQL access
  • Data warehouse
  • Apps platform

Only in Upstash

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

Both cover

  • Cloud deployment

What people use each for

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

PostHog

  • Product analyticsnot Upstash
  • Feature experimentationnot Upstash
  • User behavior trackingnot Upstash
  • A/B testingnot Upstash
  • Debug production issuesnot Upstash

Upstash

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

Where each one falls short

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

PostHog

  • The free tier covers 1M events, 5K web session recordings and 2.5K mobile recordings per month before usage-based billing starts
  • Accounts without a card on file are limited to 1 project; adding one raises it to 6
  • Data retention is 1 year until a card is added, which extends it to 7 years
  • Support is community-only until the account is on a paid plan
  • Error tracking is capped at 100K exceptions and surveys at 1500 responses per month on the free tier

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

PostHog

Free
  • FreeFree
    • 1M events/month
    • 5K sessions/month
    • Unlimited users
  • Paid$undefined/month
    • $0.00031/event
    • $0.005/session
    • Advanced permissions
  • Enterprise$undefined/month
    • SAML SSO
    • Advanced security
    • Dedicated support

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 PostHog if

  • You need product analytics.
  • You want to start without paying.
  • You work on Web, Ios, Android, Api.
  • You also want session recording.
PostHog 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 PostHog or Upstash better?
Neither clearly leads. PostHog 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, PostHog or Upstash?
PostHog starts at Free and Upstash at Free.
Does PostHog or Upstash run on more platforms?
PostHog runs on Web, Ios, Android, Api. Upstash runs on REST API, Node.js, Python, Go, Rust, Vercel Edge, Cloudflare Workers, AWS Lambda.
Can I use PostHog for free?
Both have a free tier, so you can try either at no cost before committing.
What is PostHog best used for?
PostHog is most often used for product analytics, feature experimentation, user behavior tracking, a/b testing. Of those, product analytics and feature experimentation are not what Upstash is typically brought in for.
What can PostHog do that Upstash cannot?
PostHog covers Product analytics, Session recording, Feature flags, A/B testing. Upstash covers Serverless Redis, Serverless Kafka, QStash, Global Replication. Both handle Cloud deployment.

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
ShareXLinkedInRedditWhatsAppEmail

Related pages

More on PostHog

More on Upstash

Keep looking

Other head to heads