DataFast alternatives: revenue-aware analytics compared

DataFast answers one question well: which traffic source brought the people who paid. People look elsewhere for four common reasons, and yours decides the answer.

Why people look for a DataFast alternative

There is no free plan. DataFast starts with a trial. If you are pre-revenue with a few hundred visitors a month, you may want something that costs nothing until there is money to attribute.

Cookies. DataFast’s default script uses cookies to recognise returning visitors, which DataFast says is what gives it long-term revenue attribution. Its own GDPR page says that, depending on your jurisdiction and setup, you may need a cookie banner for it. Its cookieless script exists, but DataFast itself says it is less accurate for revenue attribution.

You want to host it yourself. DataFast’s site offers no self-hosted version. Three of the tools below are open source.

You need more than analytics. Session replay, feature flags, a waitlist, feedback: DataFast’s site does not list these, and adding a vendor for each gets expensive.

If none of these apply, DataFast is probably the right tool already. More on that below.

The two ways a tool can attribute revenue

Before comparing tools, it helps to know the one design choice that matters most.

Revenue as an event. Your checkout success page sends an event with an amount and a currency. The analytics tool then splits that revenue by whatever source the visit had. This works without a payment-provider connection and without cookies, but only for revenue your site reports. A renewal, an upgrade inside the app, or a payment made days later on another device does not pass through your success page, so it gets no source unless you send that event yourself.

Revenue read from the payment provider. The tool connects to Stripe (or similar), reads customers and payments, and matches each customer back to a visitor through an id stored on the Stripe customer, an identify call, or an email. Renewals and refunds come from Stripe’s own records. This is how DataFast’s Stripe, LemonSqueezy, Polar and Shopify integrations work, and how Launch reads Stripe. PostHog imports Stripe too, but its docs say you link Stripe customers to people yourself.

You can do the event approach with any tool that accepts custom events, including free ones. The provider approach needs the tool to support it.

The alternatives

Plausible: cookieless, open source, revenue on Business

Plausible is lightweight web analytics made and hosted in the EU. It sets no cookies and keeps no persistent identifiers, so no consent banner is needed.

Revenue is the event approach: you send a goal with an amount and currency from your site, and on the Business plan you can then filter that revenue by referral source, campaign, entry page, country or device. Funnels and the Stats API are also on Business. The revenue docs describe no Stripe connection.

Suits: founders who want privacy-first analytics with years of history, an EU host, and a checkout that can send one event.

Falls short: revenue attribution and the API are not on the entry plan, there is no free cloud plan (a trial only), and payments that do not pass through your site are invisible. The free self-hosted Community Edition leaves out funnels and ecommerce revenue goals.

Umami: open source, with a free cloud plan

Umami is open-source analytics without cookies, under the MIT licence, free to self-host. Umami Cloud’s free Hobby plan includes the revenue and attribution reports, limited to one website and six months of data.

Revenue again comes from an event with revenue and currency properties. The attribution report credits a conversion (a page view or an event, such as your purchase event) to referrers, paid ads and UTM data, by first click or last click. The revenue docs mention no payment-provider integration. API and MCP access start on the paid Pro plan.

Suits: someone who wants purchases credited to sources for nothing, or wants to run it on their own server.

Falls short: the same limit as any event-based setup, and no API on the free plan.

PostHog: the whole platform

PostHog is a product-analytics platform: web and product analytics, session replay, feature flags, experiments, surveys and a data warehouse, with a monthly free allowance that does not need a card. It has an MCP server that is free to connect.

It is the only tool here besides DataFast and Launch that reads Stripe itself. Revenue analytics imports Stripe through the data warehouse and puts revenue on each person, which you can then query. It is in beta and reads Stripe only for now. Marketing analytics, an opt-in beta, attributes conversion goals to UTM source and campaign and can pull ad spend from Google Ads, Meta, LinkedIn, TikTok and others. PostHog uses a cookie by default; its cookieless mode stores nothing in the browser, counts a returning visitor as new each day, and PostHog advises against calling identify() in it.

Suits: a team that will use replay, flags or experiments anyway, or wants SQL over its events.

Falls short: “which source brought paying customers” is something you assemble from beta features rather than a report you open. There is more to set up than with a single-purpose tool.

Fathom: simple and cookieless, no payment connection

Fathom is cookieless analytics with one plan priced by pageviews and 50 sites included. Events can carry a value sent from your site, and filtering the dashboard by a referrer filters every panel, events included, so you can see what one source’s purchases were worth. The pages we read describe no Stripe or other payment-provider connection. There is no free plan; the trial needs a card.

Suits: someone running many small sites who wants plain traffic numbers and no consent banner.

Falls short: it answers DataFast’s question only for purchases your site reports, one referrer filter at a time, and has no free plan. It is on this list because it is a common cookieless choice, and you should know what you give up.

Nordva Launch

Nordva Launch is the product this site is about, so read this section with that in mind.

It works the provider way. A tracking script records sources, pages, places, goals and funnels. You connect Stripe with a restricted key that can only read, on every plan including Free, and Launch traces each paying customer to a first visit, in this order: a nordva_visitor_id in the customer’s or subscription’s metadata, identify() with your user id, identify() with the email, then the email on the waitlist. That last step means someone who joined your waitlist before launch and paid later is traced even if the script never saw them pay. Attribution is first touch only.

Cookies are decided per visit. In the default mode a visitor gets an id outside the EEA, the UK and Switzerland, and inside them only after consent; Global Privacy Control counts as no. No IP address or full user agent is stored. There are also consent, cookies and cookieless modes.

The free plan includes 10,000 analytics events a month and one Stripe connection, with 30 days of Stripe history. Indie adds cost per customer and return on spend per channel. Grouping paying customers by UTM campaign or source needs Builder; grouping by referring site and by country works on every plan. The same key runs a waitlist and a changelog on every plan, and feedback from Indie; there is an API and an MCP server on every plan.

Falls short, and you should know before you sign up: raw analytics events are kept for 90 days and the API reads at most 90 days. Launch reads revenue from Stripe only. If you need years of traffic history or LemonSqueezy, Polar or Shopify revenue, it is the wrong choice.

When DataFast is still the better choice

Stay with DataFast if you sell through LemonSqueezy, Polar or Shopify, since it reads all three and none of the other tools here do. Stay if you want AI-crawler traffic or social mentions tracked, or run many websites on one plan. Stay if you want a product built for exactly this question with years of retention, and cookies on your site are not a problem for you. Our side-by-side page has the details: DataFast and Nordva Launch compared.

How to choose

Your situation	Pick
You sell through LemonSqueezy, Polar or Shopify	DataFast
No cookies, EU hosting, and your checkout can send a purchase event	Plausible (Business)
Revenue by source for free, or on your own server	Umami
You want replay, flags and experiments too, and can build the revenue view yourself	PostHog
You mostly need traffic numbers across many sites	Fathom
Pre-launch or early, Stripe billing, and you want waitlist signups traced to payment on a free plan	Nordva Launch

Moving off DataFast

Whatever you pick, run both scripts side by side for a week or two before you remove DataFast, and compare visitor counts and sources: every tool filters bots and counts visits a little differently. Export what you want to keep first; DataFast has an API for reading your analytics. And if your new tool counts revenue from events, add the purchase event to your checkout on day one. Revenue that is not sent is never attributed, and it cannot be added afterwards.