# Atrby vs DataFast

> Both show revenue by source. DataFast is a good product and it got there first. Here is where we differ, including the places where they are ahead.

Canonical: https://atrby.site/compare/datafast
Last updated: 2026-10-26

## Side by side

Pricing and features, line by line.

### Pricing

| Capability | atrby | DataFast |
| --- | --- | --- |
| What you are billed on | Pageviews only. Events, goals, revenue and replays never count | Events |
| Entry price | $19 Starter, $39 Growth at 150k pageviews | $9 Starter, $19 Growth at 10k events |
| Free trial | 14 days, no card | 14 days, no card |
| Over your plan limit | Never locked. Moved up only after two months in a row over | Keeps tracking, but the dashboard locks until you upgrade |

### Revenue

| Capability | atrby | DataFast |
| --- | --- | --- |
| Payment processors | Stripe, Lemon Squeezy, Polar, Paddle, Dodo, Shopify, plus a payment API | Stripe, Lemon Squeezy, Polar, Paddle, Dodo, Shopify, WooCommerce, plus a payment API |
| Funnels | Every plan | Yes |

### Product

| Capability | atrby | DataFast |
| --- | --- | --- |
| Cookieless by default | Yes, with an optional Product mode per site | No. Cookies by default, with an optional cookieless script |
| Session replay | 2,000 a month on Starter, 20,000 on Growth | Not listed |
| AI traffic | AI referrals to revenue, plus which AI crawlers read your pages | 100k AI bot requests a month on each plan |
| Data retention | 3 years on Starter, 5+ on Growth | 3 years on Starter, 5+ on Growth |
| API and AI tools | MCP, API and CLI | API, CLI and MCP |
| X and Reddit mentions | Planned | On Growth |
| Mobile apps | Not yet | iOS and Android |
| Imports | Plausible and Umami | Plausible, with Google Analytics next |

DataFast details come from datafa.st/llms.txt and the datafa.st homepage, checked on 24 Oct 2026. "Not listed" means we couldn't find it there, not that it's impossible. Prices in USD per month. If something is out of date, email hello@atrby.site and we'll fix it within a day.

## What you get with atrby

Only what it does today.

- **Revenue by source.** Stripe, Lemon Squeezy, Polar, Paddle, Dodo and Shopify by signed webhook. Each payment is matched to the visit that brought it.
- **Cookieless by default.** No cookie banner needed in the default mode. Visitor ids come from a salt that changes daily and is deleted.
- **AI traffic.** Visits and revenue from ChatGPT, Perplexity, Claude and Gemini, plus which AI crawlers read your pages.
- **Funnels and goals.** Ordered funnels per visit and goals on pages or events, with the revenue of visitors who converted.
- **Web vitals from real visits.** LCP, INP, CLS, FCP and TTFB measured by the same script. No extra tag.
- **Priced on pageviews only.** From $19 a month. Events, goals, revenue and crawler hits are never metered.
- **Never locked out.** Over your tier we keep collecting and the dashboard stays open. A 14-day trial needs no card.
- **Alerts and a weekly digest.** Revenue drops, traffic spikes and a broken install by email. A Monday summary of what changed.

We only list what atrby does. Check DataFast's own site for their current features and pricing.

## Run both side by side

Keep whichever tells you more.

### 01. Add atrby next to DataFast

One script tag in the head. It doesn’t touch DataFast, and both can run together.

```html
<script defer src="https://atrby.site/atrby.js" data-site="…"></script>
```

### 02. Connect your payments

One click for each processor. atrby pulls 90 days of payments on connect, so revenue by source fills in on day one.

### 03. Compare for 14 days

Look at both side by side. Remove DataFast only when the numbers line up, or keep both.

DataFast is a trademark of its owner. We are not affiliated.

## Related
- [Compare atrby with other analytics tools](https://atrby.site/compare)
- [Atrby vs Plausible](https://atrby.site/compare/plausible)
- [Atrby vs GA4](https://atrby.site/compare/ga4)