If you are looking past DataFast, it is usually for one of three reasons: you buy traffic on Google Ads and DataFast only reads Meta, you are pre-revenue and a 14-day trial runs out before payback is visible, or you want to know whether the customers a channel brought are still around in month three.
Here is the whole answer before the detail.
| If this is you | Pick | Price |
|---|---|---|
| You buy on Google Ads and want spend joined to revenue | Ripples | Free until $1K MRR, then $9/mo |
| You want the same shape as DataFast, cheaper | Seline | $9 to $14/mo |
| You want page-level revenue attribution | Sleek | $5 to $29/mo |
| You want replay and feature flags too | PostHog | Free to 1M events/mo |
| You want privacy-first traffic only | Plausible | $9/mo, 30-day trial |
| You want free and open source | Umami | Free to 100k events/mo |
| You need free at large scale | Google Analytics 4 | Free |
We build Ripples, which is on that list. It is placed where we think it belongs rather than at the top, and we take no affiliate commission from anyone here. That second point turns out to matter more than usual, so it gets its own section.
Why the reviews you have been reading are so positive
DataFast runs an affiliate program paying 50% of every referred subscription for twelve months, with a 60-day cookie, through Rewardful. That is a generous program and there is nothing wrong with running one. It does explain something you may have noticed: published DataFast reviews are close to uniformly glowing, and a lot of the "best analytics tools" posts that mention it carry a tracking link.
This does not make those reviews wrong. It makes them worth discounting, the same way you would discount a restaurant review written by someone eating for free. We mention it because it is checkable, and because it is the single most useful thing to know before you read six more comparison posts.
What DataFast actually is, so the comparison is fair
DataFast connects your website traffic to revenue from Stripe, Lemon Squeezy, Polar or Shopify and tells you which sources produced paying customers. It costs $9 a month at the entry tier for 10,000 events, integrates Meta Ads for spend and ROAS, includes an AI chat interface for asking questions of your data, and runs a 14-day trial rather than a free plan.
It is also, by a distance, the most established product in this specific niche. Its public Stripe-verified numbers put it around $26,000 MRR across roughly 1,200 active subscriptions. If you want the tool with the largest community and the longest track record in revenue-first analytics for founders, that is DataFast, and none of what follows changes it.
The gaps are narrow and specific. No Google Ads. No free tier. ROAS and lifetime value, but no payback period. No retention or cohort reporting at all.
The seven
1. Seline
The closest thing to a like-for-like swap. Same audience, same pitch (their line is that the founder is the analytics team), $9 to $14 a month for 25,000 pageviews, Stripe revenue attribution, and a cleaner setup than most.
The catch is that it inherits two of DataFast's three gaps. There is no free plan, and their own site is direct about it. There is no ad platform integration at all, so neither Meta nor Google spend comes in.
Pick Seline if you liked DataFast and want the same thing at a slightly lower price with a simpler interface.
2. Sleek
Sleek attributes revenue at the page level, which is a genuinely different angle: it answers which pages turn into paying customers rather than which sources do. Between $5 and $29 a month depending on volume, 14-day trial.
Useful if you write a lot of content and want to know which posts earn. Less useful if your question is about channels and spend, since there is no ad platform connection here either.
Pick Sleek if content is your main acquisition channel and you want per-page revenue.
3. PostHog
The largest product on this list by an order of magnitude. Product analytics, session replay, feature flags, experiments, surveys, a data warehouse, and one million events a month free.
PostHog has revenue analytics that reads Stripe and marketing analytics that reads ad platform spend. The honest caveat, which we expect to expire at some point: the marketing side is still in beta and the two halves are not joined into a payback figure. You can build most of it yourself with cohorts and insights, and plenty of founders have.
Pick PostHog if you want one platform for everything and have an afternoon to configure it. See our PostHog comparison for where that trade lands.
4. Plausible
Not a revenue tool, and we are including it because a fair number of people leaving DataFast discover they only ever used the traffic screen. Plausible is $9 a month for 10,000 pageviews, open source, EU-owned and EU-hosted, with a dashboard that is genuinely pleasant to read.
Revenue means ecommerce revenue goals on the Business plan from $19. There is no ad spend side and no retention.
Pick Plausible if privacy is part of what you tell your users and traffic is the actual job.
5. Umami
Free, MIT licensed, self-hostable, and Umami Cloud has a real free tier at 100,000 events a month rather than a trial. The feature list has grown a long way past traffic: goals, funnels, journeys, retention, session replay, heatmaps, and a revenue view that breaks revenue down by referrer.
The catch is where that revenue comes from. Umami knows about a payment only when your own code fires an event carrying it, so there is no billing connection doing the work for you, renewals need a job you write and maintain, and there is no ad spend side at all. But free is a strong argument, and if you already run a Postgres somewhere then self-hosting is close to free at any volume.
Pick Umami if free matters more than having revenue arrive from Stripe on its own.
6. Google Analytics 4
Free up to 10 million events a month, which nothing else here approaches, and it links natively to Google Ads for conversion bidding, which nothing else here does either.
The cost is not money. GA4 needs a property, a data stream, events, conversions and audiences configured before it says anything useful, and joining it to Stripe subscription revenue is a real project involving the Measurement Protocol and probably BigQuery. We wrote up how to connect Stripe to Google Analytics, including the part where it still does not answer the question.
Pick GA4 if free at scale is the requirement, or Smart Bidding is central to how you buy traffic.
7. Ripples
Ours. Traffic, signups, Stripe revenue and Google Ads spend on one screen, joined to the first touch that brought each person, with payback period and retention split by acquisition channel. Free until your project reaches $1K MRR, then $9 a month, with no feature gating on any plan.
The two differences from DataFast that made us build it: Google Ads spend imports on every plan including free, and retention is reported per channel, so a channel with a strong day-one ROAS and heavy month-two churn shows up as what it is.
What we do not have: Meta Ads, session replay, heatmaps, feature flags, self-hosting, and the community DataFast has spent two years building. The full list of what we deliberately do not do is public.
Pick Ripples if your spend goes to Google Ads, or if retention by channel is the number you keep trying to work out in a spreadsheet.
What DataFast still does better
Three things, and they are not small.
Meta Ads. If Facebook and Instagram are where your budget goes, DataFast reads that spend and we do not. That is the entire decision and nothing else on this page outweighs it.
Maturity. More users, more integrations tested against real sites, and a founder with a large audience who ships regularly.
The AI chat. Asking your data a question in plain English is a real feature that people use. We write a weekly plain-language brief instead, which is a different bet and not obviously the better one.
Picking in five minutes
Where does your ad budget go? Meta means DataFast. Google means Ripples. Neither means the choice is about something else.
Do you have revenue yet? If not, the trial-based tools will expire before you learn anything, because payback takes weeks to become visible. Umami, PostHog and Ripples all have free tiers that outlast that.
Do you need to know about month three? Retention by channel is the thing almost nobody in this category reports. PostHog can if you build it, Ripples does by default, and the rest do not.
Sources
Prices and features checked August 2026. Vendor pricing changes without notice, so click through before you decide anything.
- DataFast and the DataFast affiliate program
- Seline
- Sleek
- PostHog pricing
- Plausible pricing
- Umami Cloud pricing
- Ripples pricing
Found something out of date here? Tell us and we will fix it. A comparison nobody can trust is worth less to us than no comparison at all.