Turn PostHog analytics into a complete business picture

Keep PostHog for product analytics. Add Sumly for the revenue side: MRR, churn and fees from Stripe, RevenueCat and the app stores, every payment tied to the visit that brought it, across all your projects. Nothing to replace.

PostHog as described on its own pages, 9 November 2026.

Two tools, two questions

PostHog: what people do in the product

  • Events and autocapture of clicks, forms and page views
  • Session replay with console and network logs
  • Feature flags, experiments and surveys
  • Heatmaps, error tracking and a SQL data warehouse

Sumly: where the money comes from

  • MRR, ARR, churn, LTV, refunds and fees, worked out from your billing
  • 22 payment providers payment providers, Stripe, Paddle and RevenueCat to the App Store and Google Play
  • Each payment tied to the visit or app install that brought it
  • Every project apart and all of them together, with a monthly package for your accountant

Sumly runs next to PostHog, not inside it: there is no PostHog connection, and none is needed.

Set up in a few minutes

  1. 1

    Keep PostHog where it is

    Nothing in your product changes. PostHog keeps product analytics, replay and flags.

  2. 2

    Add Sumly's line next to it

    One script tag beside PostHog's. From your own domain, so ad blockers do not stop it.

  3. 3

    Connect billing with a read-only key

    Stripe, Paddle, Lemon Squeezy, RevenueCat, the App Store or Google Play. The first read goes back three years, so MRR and churn have their history at once.

  4. 4

    Read revenue by source

    Each payment shows the visit or install behind it, by first touch, last touch or linear. Payment Links and checkouts that send the buyer back link by themselves.

Questions about Sumly next to PostHog

Does Sumly connect to PostHog?

No. The two run side by side, each with its own script. Sumly reads payments from your billing providers, not from PostHog.

Can PostHog show revenue too?

Yes, in beta: MRR, churn and LTV from Stripe or from revenue events you send, used in insights, SQL or PostHog AI, with each Stripe customer tied to a person through its metadata. Sumly reads every payment provider and the app stores, links buyers to visits by itself, and adds up every project.

Why not just one of them?

They answer different questions. PostHog: what did people do in the product, and did the change work. Sumly: how much came in, from which channel, campaign or creator, and what is MRR doing.

What does it cost?

Starter is $9 a month and Growth $19 for 500k visits a month, each with a 14-day trial and no card. The demo shows every page without an account.

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Try it with your own projects

Sign in with Google or a code by e-mail and connect your first project. The first 14 days of a paid plan are free, with no card.

Start free trial

Or look around first: open the live demo.

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