Most analytics dashboards will tell you how many people showed up. Very few will tell you which of those people paid you. That gap is the whole reason DataFast exists, and it explains why the tool has spread so quickly among solo founders who are tired of squinting at Google Analytics 4 and guessing which tweet, blog post or Reddit thread actually moved the needle.
It's a narrow product with a clear point of view. That makes it easy to recommend to some people and easy to rule out for others.
DataFast at a glance
| Product | DataFast |
|---|---|
| Website | datafa.st |
| Founder | Marc Lou, a French indie hacker based in Bali |
| Launched | October 2024 |
| What it is | Web analytics built around revenue attribution |
| Entry price | $9 a month (Starter, 10,000 events) |
| Free trial | 14 days, no credit card |
| Payment integrations | Stripe, LemonSqueezy, Polar, Shopify |
| Site builders supported | WordPress, Webflow, Framer, Bubble, Wix, Squarespace, Ghost, Podia, Kajabi, Google Tag Manager |
| Mobile app | iOS and Android |
| API | REST, Bearer token authentication |
| Privacy | Cookieless tracking, GDPR friendly |
| Users | More than 17,000 (early 2026) |
| Reported revenue | About $27,000 a month (self-reported, mid-2026) |
| Icon Polls rating | 3.5 out of 5 |
One founder, a lot of launches
If you follow the build-in-public crowd on X, you know Marc Lou. He's the person behind ShipFast, a Next.js boilerplate for launching SaaS products, and CodeFast, a coding course. Product Hunt named him Maker of the Year in 2023, and he has shipped more than 20 products, a good number of which topped Product Hunt on launch day.
He also publishes his numbers. According to his public revenue page, DataFast was bringing in roughly $21,000 a month by late 2025 and around $27,000 a month by mid-2026. These are self-reported figures, not audited ones, but the transparency is part of the brand.
Here's why that background matters. DataFast isn't a venture-funded company with a big engineering bench. It's one person building for an audience he belongs to. You get sharp product instincts. You also get the limits of a solo roadmap.
The one question it answers
DataFast does not try to replace every report Google Analytics offers. It focuses on a single question: which marketing channels bring in customers who pay?
You drop a tracking script of about 4KB onto your site, which is lighter than most analytics snippets, then connect a payment processor. From there the dashboard shows revenue per visitor, revenue per traffic source and revenue per page. You can set custom goals such as email signups or lead magnet downloads, and follow the journey from first click to conversion.
A live visitor view shows who is on your site right now, where they came from and whether they buy. Cross-domain tracking, subdomain tracking and custom events are supported. Connect Google Search Console and, with revenue attribution on, you can see which search keywords drive actual sales rather than just clicks. For anyone doing SEO on a small product, that's the most interesting feature in the box.
Setup is the easy part
This is where DataFast is strongest. WordPress gets a dedicated plugin, Shopify gets an app, and Webflow, Framer, Bubble, Wix, Squarespace, Ghost, Podia and Kajabi each have their own guide. Developers get an npm package and instructions for Next.js, React Router, Vue.js, Django and Laravel, with Google Tag Manager as a fallback.
You can link several payment providers at once, and a Payment API covers processors without a native integration. The weak spot is history. Plausible data can be imported, but Google Analytics import had not shipped when this review was first published. If years of GA data matter to you, that's a real obstacle.
The API: useful, not deep
You generate a key in website settings and send requests to datafa.st/api/v1/ with Bearer authentication. The API lets you create goals server-side, pull visitor data (identity, activity and prediction data), fetch time series analytics and manage websites, funnels, alerts and tokens. There's an interactive playground for testing endpoints, and a community-built MCP server lets AI assistants such as Claude query DataFast data.
It covers the basics. It doesn't yet offer the granular exports or complex querying that established platforms do, so treat it as a convenience layer rather than a data warehouse feed.
A phone app for checking, not changing
The iOS and Android apps show live visitors, revenue charts across 24 hours, 7 days and 30 days, top sources and push alerts when traffic spikes. That's enough for a glance between meetings. Funnels and goals can't be configured from the app, so any real changes still happen on the web dashboard.
Reddit likes the tool more than the marketing
Feedback on Reddit splits neatly in two. People who have used DataFast tend to praise its simplicity next to GA4 and call the revenue attribution genuinely useful. The criticism is mostly about promotion. DataFast runs an affiliate program paying 50% commission, and users in r/SaaS and r/indiehackers have complained about affiliates spamming threads with links. That's not a product flaw, but it has dented the brand.
Technical users also make a fair point: this is a tool for small operations. Large e-commerce stores and businesses with complex multi-touch attribution needs will outgrow it.
Paying for events
Pricing is event-based. Starter costs $9 a month for 10,000 events, one site, one team member and three years of data retention. Growth supports up to 30 sites, 30 team members and five or more years of retention, and adds social mention tracking on X and Reddit plus link attribution. Plans then scale by volume: 100,000, 200,000, 1 million events and up.
Go over your limit and DataFast keeps tracking quietly, but locks the dashboard until you upgrade. Annual billing saves about two months.
Gaps you'll feel
- No custom reports or scheduled exports, so sharing data with a team means manual work.
- No session replay or heatmaps.
- Cross-domain tracking and custom events need some technical comfort, though the documentation and public changelog help.
- Google Analytics import was still missing at first publication.
Our rating: 3.5 out of 5
DataFast does one job well: it connects traffic to revenue so you can stop spending time on channels that don't pay. The clean interface, fast setup, light script and cookieless tracking all earn points. Thin reporting, a young API, limited imports and the affiliate spam problem take some away. For solo founders and small SaaS teams, it's a strong pick. For anyone else, it's a specialist tool rather than an all-rounder.
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Three things buyers ask
Is DataFast legit?
Yes. It's built by Marc Lou, a well-known indie maker, has more than 17,000 users and ships updates on a public changelog. Just remember it's a one-person operation.
Is there a free plan?
No permanent one. You get a 14-day trial without a credit card, then plans start at $9 a month.
Can it replace Google Analytics?
For small teams who mainly care about revenue attribution, often yes. If you rely on audience segmentation, demographics, session replays or multi-touch models, no.
