DataFast Review (2026)

DataFast is the only tool in this directory with revenue attribution across eight payment processors at $9/month. Stripe, LemonSqueezy, Polar, Paddle, Shopify, DodoPayments, WooCommerce, plus a custom Payment API. Seline matches Stripe alone; nothing else in the directory does multi-processor.

The integration is metadata-pass-through (no webhook). DataFast sets datafast_visitor_id + datafast_session_id cookies on first visit; you inject them into Stripe Checkout metadata; DataFast pulls payments via Stripe API key, joins by metadata. Sane indie-SaaS pattern.

Layer Google Search Console on top and you get revenue-per-keyword estimates — essentially nothing else in this list ships that out of the box. For a solo founder running Twitter ads + organic + a Stripe checkout, this is the cheapest path to "did the $400 I spent on Reddit actually return?"

Founder-fit features. 𝕏 links attribution included on every plan (useful for indie founders running on X). AI-builder install guides for Bolt, Lovable, Replit, Vercel v0 (captures the vibe-coding cohort directly). Marc Lou (ShipFast/Indie Maker creator) is the named founder.

Three things to know before you trust it with revenue data.

(1) Zero third-party certs. No SOC 2, no ISO 27001 — /security returns 404. The legal entity is JustShipIt Pte. Ltd. in Singapore; infrastructure is "outside the EU, including in the United States" (DPA verbatim) on AWS + Vercel + ClickHouse + TinyBird + MongoDB + Upstash + Mapbox + OpenAI. EU B2B buyers will rule this out on the data-residency question alone.

(2) Default tracking uses cookies, full stop — Stripe attribution literally depends on the datafast_visitor_id cookie. The cookieless variant exists but rotates its salt every 24 hours, which means "each calendar day can look like a different visitor" (vendor verbatim) and kills the multi-day attribution you bought the product for.

(3) Attribution model is undocumented. No public statement of last-touch vs first-touch, no attribution-window definition. The product copy says "first click to customer" but the actual joiner logic isn't published. DNT is not honored.

Single-site cap on $9 tier. 30-site Growth tier starts at $19 (10K) → $39 (100K) → climbs fast. Closed-source, no self-host, founder-as-product (Marc Lou, bus factor 1).

Best for: indie SaaS founders / bootstrappers running paid acquisition who need to know "did Twitter/Reddit/Google Ads actually pay back?" — and who use Stripe / LemonSqueezy / Polar / Paddle (the indie-SaaS payment stack). Vibe-coded SaaS on Bolt / Lovable / v0 / Replit (install guides exist for those exact stacks). Shopify stores wanting channel-revenue attribution beyond GA4. Small content sites monetized through Stripe checkouts (info products, courses on Podia/Kajabi).

Real value: the combination of GSC keyword data + Stripe revenue → revenue-per-keyword estimate is genuinely useful and rare in this price band. Channel-level "Revenue per Visitor" by source is the right metric for indie acquisition decisions. 8-processor coverage means it works with whatever payment stack you already have.

Not for: EU-regulated B2B (no SOC 2/ISO, US infra, OpenAI sub-processor, cookies on by default — pick Matomo Cloud or Piwik PRO instead). Multi-touch attribution shops (this is single-touch only — buy Triple Whale, Northbeam, or Dreamdata). High-traffic publishers (10M+ events): at $199 Starter / $399 Growth, you're paying premium for an analytics tool with no certs. Privacy-purist sites that promise "no cookies, no banners" — default mode contradicts that. Anyone needing DNT honored — only Fathom does that.

1. Sign up at datafa.st, 14-day trial, no card.
2. Drop the script in :
`html
<script defer data-website-id="dfid_" data-domain="yourdomain.com" src="https://datafa.st/js/script.js">
`
3. Connect Stripe via API key (read-only on charge, customer, checkout.session). No webhook needed.
4. Wire metadata pass-through (load-bearing step):
`javascript
const session = await stripe.checkout.sessions.create({
metadata: {
datafast_visitor_id: cookieStore.get('datafast_visitor_id')?.value,
datafast_session_id: cookieStore.get('datafast_session_id')?.value
},
});
`
For LemonSqueezy / Polar / Paddle / Shopify, follow the equivalent metadata-field pattern in their per-processor doc page.
5. Connect Google Search Console (owner or full-user permission required).
6. Define one custom goal (signup) and one funnel (landing → signup → paid).
7. Make one real test purchase end-to-end and verify it appears with utm_source populated. If "unattributed," your metadata pass-through is wrong — fix before migrating away from GA4.

From GA4 + UTM spreadsheet → DataFast. Run them side-by-side for two to three weeks; visit-count parity within ~5-10% is normal (DataFast filters bots, GA4 doesn't). Channels port directly — DataFast reads the same utm_source/utm_medium/utm_campaign/utm_term/utm_content GA4 expects, no re-tagging needed.

Stripe attribution is the breaking change: only payments that flow through your wired-up checkout (with datafast_visitor_id metadata) attribute. Historical payments before you wired the metadata appear as "unattributed" forever.

The UTM-spreadsheet → revenue join most indies maintain by hand becomes obsolete — DataFast's Campaigns tab + GSC integration replaces the utm_source × Stripe export VLOOKUP.

Watch out: if your checkout lives on a third-party domain (Lemon-hosted page, Stripe Payment Link without metadata wired), attribution silently dies. Test one purchase end-to-end before declaring migration done.

Cookie banner stays if you stay on default script. Switching to cookieless to drop the banner means accepting 24h-salt-rotation, which breaks multi-day attribution and undoes the migration's value.