datafa.st popularized revenue-first analytics for founders. DataFast.app uses the same revenue-attribution wedge, adds a paid plans from $5/mo — roughly half the price of datafa.st — plus a free tier and a local SEO angle for Vietnamese startups.
5,000 events/month free. No credit card required.
| Feature | DataFast.app | datafa.st |
|---|---|---|
| Revenue Attribution | Built-in payment attribution | Built-in payment attribution |
| Core Analytics Wedge | Traffic source to revenue | Traffic source to revenue |
| Free Tier | 5,000 events/month free | 14-day free trial |
| Starting Paid Plan | $5/month | $9/month |
| Vietnamese Founder Angle | Localized pages for Vietnamese startup search intent | Global-English positioning |
| Self-Hostable | Yes, open-source | Hosted SaaS |
| Privacy-Friendly Tracking | Cookieless by default | Default script uses cookies; cookieless option available |
| Payment Providers | Stripe and LemonSqueezy | Stripe, LemonSqueezy, Polar, Shopify, and Payment API |
| Best Fit | Cost-sensitive founders who want revenue attribution fast | Founders who want Marc Lou's mature DataFast product |
The job is the same: show which marketing channels create revenue. DataFast.app stays focused on the small founder use case of traffic, campaigns, pages, and payments. datafa.st has a broader hosted product with more mature feature coverage.
DataFast.app has paid plans from $5/mo — roughly half the price of datafa.st — plus a permanent free tier for the smallest sites. datafa.st offers a no-card 14-day trial and a $9/month Starter plan.
Many Vietnamese founders do not search for analytics tools in the same way global English buyers do. DataFast.app can capture searches like "cong cu analytics doanh thu cho startup" and "do kenh marketing ra doanh thu" with localized copy instead of relying only on broad English positioning.
Yes. DataFast.app starts from $5/month for paid plans, while datafa.st starts at $9/month. DataFast.app also has a free tier with 5,000 events/month, while datafa.st currently offers a 14-day free trial.
Yes, the core wedge is the same: connect traffic sources to real revenue so founders can see which campaigns, referrals, pages, and channels create paying customers instead of only pageviews.
Because datafa.st is the clear reference product for revenue-first analytics. This page helps founders who like that concept but want an open-source, lower-friction, cheaper-to-start option.
DataFast.app can target Vietnamese founders searching in Vietnamese for revenue analytics, marketing attribution, and startup analytics. datafa.st primarily serves the global English market.
Choose datafa.st if you want Marc Lou's mature hosted product, broader payment-provider coverage, mobile apps, and the current official feature set around funnels, journeys, and live visitor intelligence.
Choose DataFast.app if you want a free tier, open-source/self-hostable software, and a focused revenue-attribution tool that can be localized for Vietnamese founders and long-tail startup SEO.