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Technology · head to head

PostHog vs SolidJS

PostHog logo

PostHog

Technology

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

From
Free
Rated
-
Full reviewWebsite
SolidJS logo

SolidJS

Web Development

Reactive JavaScript framework with no virtual DOM

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; SolidJS much smaller ecosystem than React, so many problems have no off-the-shelf library
  • They diverge on capability: PostHog covers Product analytics, SolidJS covers No virtual DOM.
  • Prices and features above were last checked on 30 August 2026.

Where they differ

Only the attributes on which PostHog and SolidJS actually diverge.

Attributes where PostHog and SolidJS differ
AttributePostHogSolidJS
Pricing modelusage-basedOpen source, no licence fee
PlatformsWeb, Ios, Android, ApiWeb
CategoryTechnologyWeb Development
Founded2020Unknown

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 PostHog

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

Only in SolidJS

  • No virtual DOM
  • Components run once
  • JSX syntax
  • Small bundles

What people use each for

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

PostHog

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

SolidJS

  • Interfaces where update performance is the binding constraintnot PostHog
  • Teams comfortable with React syntax who want finer-grained reactivitynot PostHog
  • Applications where bundle size directly affects the businessnot 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

SolidJS

  • Much smaller ecosystem than React, so many problems have no off-the-shelf library
  • The React-like syntax is misleading: components run once, and React habits produce subtle bugs
  • Smaller hiring pool and fewer learning resources than the mainstream frameworks

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

SolidJS

Free
  • SolidJSFree
    • Full library
    • Commercial use permitted
    • No usage limits

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 SolidJS if

  • You need no virtual dom.
  • You want to start without paying.
  • You also want components run once.
SolidJS review

Questions people ask

Is PostHog or SolidJS better?
Neither clearly leads. PostHog starts at Free and SolidJS at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, PostHog or SolidJS?
PostHog starts at Free and SolidJS at Free.
Does PostHog or SolidJS run on more platforms?
PostHog runs on Web, Ios, Android, Api. SolidJS runs on Web.
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 SolidJS is typically brought in for.
What can PostHog do that SolidJS cannot?
PostHog covers Product analytics, Session recording, Feature flags, A/B testing. SolidJS covers No virtual DOM, Components run once, JSX syntax, Small bundles.

Answered from the vendors’ own pages

PostHog: What does PostHog's free tier include per month?

PostHog free tier includes: 1M analytics events, 5K session replays, 1M feature flag requests, 100K error tracking exceptions, 1,500 survey responses, 1M data warehouse rows, 10K data pipeline events, 100K AI observability events, 500 PostHog AI credits, 10K workflow messages, and 10GB log ingestion. Source: https://posthog.com/pricing

Source
SolidJS: Is SolidJS free?

Yes, open source under the MIT licence.

PostHog: How much data retention does PostHog provide on paid plans?

PostHog free tier provides 1-year data retention. Pay-as-you-go plans offer 7-year data retention across all projects, enabling longer historical analysis. Source: https://posthog.com/pricing

Source
SolidJS: Is SolidJS just React without the virtual DOM?

The syntax is similar but the model is not. Solid components run once and reactivity is fine-grained, so patterns that are correct in React can be wrong in Solid.

PostHog: What percentage of PostHog users stay on the free tier?

PostHog states that 97% of companies use PostHog for free, indicating extensive free tier adoption. However, specific per-unit pricing rates for overages on paid plans are not published. Source: https://posthog.com/pricing

Source
SolidJS: Why is SolidJS fast?

It compiles away much of the framework and updates individual DOM nodes directly, rather than re-rendering components and diffing a virtual DOM.

PostHog: When does PostHog provide priority support on paid plans?

PostHog provides email or Slack support for accounts exceeding $2,000/month on pay-as-you-go plans. Specific response times and support SLAs are not detailed on their pricing page. Source: https://posthog.com/pricing

Source
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