Same idea, different deal
Both tools answer the question that matters: which traffic source brought the people who paid. DataFast is a hosted subscription. DataBull is software you buy once and run in your own Cloudflare account, so the bill doesn't grow with your traffic or your number of sites.
| DataBull | DataFast | |
|---|---|---|
| Pricing | One-time payment, currently $29 (launch price, rising to $99). Lifetime updates. | Subscription. Starter $9/month (10k events, 1 website), Growth $19/month (10k events, 30 websites). Higher volumes cost more; yearly billing gives two months free. |
| Hosting | Self-hosted on your own Cloudflare account (Workers + D1). One command installs it. | Hosted by DataFast. Nothing to run. |
| Running cost | Cloudflare's free plan covers most sites (roughly 20,000 pageviews a day). Above that, Workers Paid is $5/month, paid to Cloudflare. | Included in the subscription. Over your event limit, tracking continues but you upgrade to see the dashboard. |
| Payment providers | Stripe, Polar and Dodo Payments, connected with a key. Past sales import; renewals and refunds follow by webhook. | Native Stripe, LemonSqueezy, Polar and Shopify integrations; guides for Paddle, Dodo Payments, WooCommerce and more, plus a Payment API. |
| Cookies | Your choice per site: first-party cookies, cookieless, or cookieless until consent. | A visitor cookie by default, or an optional cookieless script. |
| Data retention | You choose: 30 days to forever (the default). Payments are never deleted automatically. | 3 years on Starter, 5+ years on Growth. |
| Trying it | Live demo on the home page. No trial, and all sales are final. | 14-day free trial, no card needed. |
Switching takes one script tag
DataBull reads DataFast's conventions, so most sites only swap the tag:
data-fast-goalattributes andwindow.datafast()calls keep working as goals.- Checkout metadata named
datafast_visitor_id/datafast_session_idis read too, so your server code doesn't change. - Past sales import from Stripe, Polar or Dodo on day one. Source attribution starts with the visits DataBull tracks.
See Revenue attribution and Goals & funnels in the docs.
What you get with DataBull
- Every Stripe, Polar and Dodo payment, renewal and refund credited to the visit that produced it. How attribution works.
- "Direct" split into typed, shared link, checkout return and in-app browsers.
- Lifetime value by first source, funnels, realtime visitors and Telegram pings for every sale.
- Your data in your own D1 database. It never touches our servers.
When DataFast is the better choice
- You don't want to run anything, not even on Cloudflare's free plan, or you don't have a Cloudflare account.
- You take payments through LemonSqueezy, Paddle, Shopify or WooCommerce. DataBull connects Stripe, Polar and Dodo only.
- You want to try it on real traffic for two weeks before paying.
- You track a single small site and $9 a month is simply less than you want to think about.
Competitor details as of October 2026, from their public pages: datafa.st (pricing and integrations), revenue attribution guide, cookieless tracking. Prices and plans change; check the source before you decide. Spotted something out of date? Tell us and we'll fix it.