Grosslytics vs DataFast
The DataFast alternative that counts what you keep.
Grosslytics is a revenue-first analytics tool like DataFast: it shows which posts, searches and AI answers bring paying customers. The differences are that Grosslytics subtracts payment fees and ad spend so you see net revenue, supports Razorpay and Paddle, needs no cookies, and can run free on your own Cloudflare account. DataFast is the more mature hosted product, with Shopify support and social-mention tracking.
By the Grosslytics team · · Checked against datafa.st
What is DataFast?
DataFast (datafa.st) is a hosted, revenue-first web analytics tool. You add a script, connect Stripe, Lemon Squeezy, Polar or Shopify, and it shows revenue per channel, goals, funnels, visitor journeys and a live visitor view. It also offers an API, CLI and MCP server for AI agents, and its Growth plan adds social mentions on X and Reddit. Its default script uses cookies; a cookieless script is available with lower accuracy.
DataFast vs Grosslytics at a glance
| Capability | DataFast | Grosslytics |
|---|---|---|
| Tracker size (Brotli) | 4.5 KB | 1.5 KB |
| Price | From $9/mo (Starter, 10k events, 1 site); Growth from $19/mo | $0 self-hosted; hosted $5/mo and $29 lifetime plans |
| Free option | 14-day free trial, no card | Self-hosting is free, no time limit |
| Payment providers | Stripe, Lemon Squeezy, Polar, Shopify, plus a Payment API | Stripe, Razorpay, Polar, Paddle, Lemon Squeezy |
| Gateway fees | Not mentioned on datafa.st | Deducted automatically per gateway |
| Ad spend and profit | Not mentioned on datafa.st | Enter daily spend per source; see profit per channel |
| Self-hosting | Not offered on datafa.st | Yes, on your Cloudflare account |
| Data retention | 3 years (Starter), 5+ years (Growth) | As long as you keep it in your own database |
| MCP server | Yes (API, CLI and MCP) | Yes |
| Cookies | Cookies by default; a cookieless script is available | No cookies; a random visitor ID in localStorage |
DataFast details are from their public website, checked 2026-11-07. Tracker sizes were measured by compressing each script with Brotli. Sources: datafa.st (features, pricing, FAQ), datafa.st/js/script.js (measured).
Choose DataFast if
- You sell through Shopify or need a generic Payment API
- You want social-mention tracking for X and Reddit
- You want a hosted product with a large user base and nothing to deploy
Choose Grosslytics if
- You get paid through Razorpay or Paddle
- You want revenue after Stripe fees and ad spend, not just gross
- You want to own the data on your own Cloudflare account, for free
- You want no cookies by default and a smaller script
DataFast pricing vs Grosslytics pricing
DataFast is priced by monthly events. Starter starts at $9/month for 10,000 events, one website and three years of data. Growth starts at $19/month and adds up to 30 websites, 30 team members, 5+ years of data, and social mentions. Larger traffic tiers cost more. If you go over your plan, DataFast keeps tracking but asks you to upgrade to see the dashboard.
Grosslytics self-hosted costs $0: you run it on your own Cloudflare account, and Cloudflare’s free tier covers most small sites. There is no event cap set by us and no site limit. Hosted plans ($5/month, or $29 once for a lifetime self-hosted license) are offered from /start.
Gross revenue vs net revenue
DataFast reports the revenue your payment provider records. Grosslytics reports that too, then lets you switch to net (after gateway fees) or profit (after fees and the ad spend you enter for each source). On a $10,000 month with $450 in fees and $8,000 of ads on one channel, gross says the channel is your best. Profit says it made $1,550.
This matters most for founders on merchant-of-record platforms like Paddle or Lemon Squeezy, whose fees are higher than a plain card payment.
Attribution models
Grosslytics gives you first-touch, last-touch and linear attribution, switchable with one click. Source revenue, revenue per visitor and profit recalculate for the model you pick. Renewals stay credited to the channel that found the customer.