ProductLense vs DataFast
ProductLense and DataFast both join website analytics to your billing so revenue shows next to the channel that brought it. ProductLense also subtracts processor fees and ad spend from any channel to show profit, has a free plan, states its attribution model, and reads Razorpay, Chargebee, Gumroad and Creem.
What you pay at each size
| Events or pageviews a month | ProductLenseevents | DataFastevents |
|---|---|---|
| 10k | $0 | $9/mo $90/yr Starter, 1 website |
| 100k | $19/mo $190/yr | $19/mo $190/yr Starter. From their pricing page code, checked 2026-10-11 |
| 1M | $49/mo $490/yr | $69/mo $690/yr Starter. From their pricing page code, checked 2026-10-11 |
| 10M | $149/mo $1,490/yr | $169/mo $1,690/yr Starter. From their pricing page code, checked 2026-10-11 |
Prices and features from each vendor’s public pages, checked on . Tell us if something changed.
Feature by feature
| Feature | ProductLense | DataFast |
|---|---|---|
| Free tier | 10k events a month | No, 14-day trial |
| Cookieless, no consent banner | ✓ Yes | Optional mode; cookies by default |
| Revenue attribution from billing | ✓ Yes | ✓ Yes |
| Billing providers | 10 plus a payment API | 8 plus a payment API |
| Profit per channel (spend and fees subtracted) | Growth and Scale | ROAS from Meta ad spend; no fees |
| Revenue retention cohorts by channel | Growth and Scale | Not listed |
| Funnels | Starter and up | ✓ Yes |
| Visitor journeys | Starter and up | ✓ Yes |
| Session replay | ✗ No | Not listed |
| Feature flags | ✗ No | Not listed |
| AI questions | Unlimited on every plan | MCP, CLI, ChatGPT app |
| INR pricing | ✓ Yes | Not listed |
What $19 a month buys
| ProductLense Starter | DataFast | |
|---|---|---|
| Events a month | 100k | 100k |
| Websites | 3 | 1 |
| Seats | Unlimited on every plan | 1 |
| Funnels and visitor journeys | Yes | Yes |
| Billing connections | 1 | Every supported provider |
| Read API and MCP | Yesv1.1 | API, CLI and MCP |
| History | 12 months in the dashboard | 3 years |
| Over the limit | Keeps recording up to 2×, reports never lock | Keeps tracking, dashboard locks until upgrade |
| Price source | productlense.app/pricing | From their pricing page code, checked 2026-10-11 |
Where ProductLense is ahead, with the evidence
Each line is a fact from ProductLense’s docs and a fact, or a documented absence, on DataFast’s site, checked on 11 October 2026.
A free plan
ProductLense: Free up to 10k events a month, one site, no card.
DataFast: 14-day trial, no free plan.
Profit, not only revenue
ProductLense: Subtracts processor fees and ad spend per channel, source, medium and campaign, with CAC, ROAS and payback.
DataFast: Shows ROAS from Meta ad spend; processor fees are not documented anywhere in its docs.
ProductLense: Profit per channel·ProductLense: CAC, ROAS and payback·DataFast: Meta Ads attribution
Ad spend from any channel
ProductLense: Manual and CSV spend for Google, LinkedIn, newsletters, sponsorships, anything tagged with UTMs.
DataFast: Spend comes from Meta Ads only.
Retention by channel
ProductLense: Net revenue retention cohorts by channel, source or campaign, months 0 to 12.
DataFast: Not found in its docs, API reference or changelog.
MRR movements and LTV by channel
ProductLense: MRR with new, expansion and churned MRR, refunds, ARPU and LTV per channel.
DataFast: Lifecycle goals and an MRR display toggle; no MRR movement report is documented.
Four billing providers DataFast does not document
ProductLense: Razorpay, Chargebee, Gumroad and Creem, plus exact processor fees where the provider reports them and flagged estimates where it does not.
DataFast: Documents Stripe, Lemon Squeezy, Polar, Paddle, Shopify, Dodo Payments, WooCommerce, Easytool and a payment API.
ProductLense: Connect billing·ProductLense: Refunds, fees and currencies·DataFast: connect a payment provider
A stated attribution model
ProductLense: First touch, the payment → customer → identity → visitor chain, and a nightly re-attribution for late identify calls.
DataFast: Does not state its model.
ProductLense: How payments are attributed·DataFast: revenue attribution guide
A lighter script
ProductLense: a.js is 2,271 bytes gzipped and cached for a day.
DataFast: script.js is 5,266 bytes gzipped (15,376 raw), served with max-age=0. Measured on 11 October 2026.
No cookies and no device storage by default
ProductLense: Stores nothing on the device before identify, hashes the IP with a daily salt that is deleted, never stores the IP.
DataFast: The default script sets a 365-day visitor cookie; its own page says a banner may be needed.
ProductLense: Cookieless visitor counting·DataFast: GDPR and cookieless tracking
Data location stated
ProductLense: Stored in Germany.
DataFast: Not stated on the pages we read.
ProductLense: Data retention·ProductLense: Security practices·DataFast: GDPR and cookieless tracking
Export your data
ProductLense: A zip of daily traffic, pages, geo, events, payments and ad spend CSVs with column definitions.
DataFast: No export documented besides the API.
AI answers with checked numbers
ProductLense: Ask runs a validated query, shows the real table, and drops any summary whose numbers do not match; the daily insight uses the same check.
DataFast: AI features are external agents over MCP; no in-product number check is documented.
A method page with error bounds
ProductLense: Publishes how every number is counted and the unique-count error bound (about 0.8% to 1.6%).
DataFast: No methodology page.
More at $19, and cheaper at 1M and 10M
ProductLense: $19 for 100k events with 3 sites, unlimited team members, funnels and journeys; $49 at 1M; $149 at 10M.
DataFast: Starter: $19 at 100k with 1 site and 1 seat; $69 at 1M; $169 at 10M. Prices above 10k: from their pricing page code, checked 2026-10-11.
INR pricing with UPI
ProductLense: ₹999, ₹2,499 and ₹6,999 a month for accounts registered in India.
DataFast: Prices in USD only.
Hostname allowlist by default
ProductLense: Events from hosts not on the site’s list are rejected, so staging never pollutes your numbers.
DataFast: Tracks every subdomain by default; an allowed-hostnames setting exists.
File downloads tracked automatically
ProductLense: Outbound links and file downloads, with no extra code.
DataFast: Documents outbound (exit) links only.
ProductLense: Outbound links and downloads·DataFast: script configuration
Where DataFast is ahead today
Nothing below is shipped in ProductLense yet. Items marked “In v1.1” are being built; the rest are not scheduled.
In v1.1
- Visitors recognised across days without identify. DataFast’s default script keeps a 365-day cookie. ProductLense counts a visitor per day and joins days after identify. In v1.1, passing the visitor id to checkout and payment-link capture attribute multi-day purchases without a cookie. datafa.st/docs/gdpr-cookieless-tracking
- No-code payment links. DataFast attributes Stripe Payment Links and Lemon Squeezy and Polar checkout links from the success URL. In v1.1 for ProductLense. datafa.st/docs/stripe-payment-links
- Read API, MCP server and ChatGPT app. DataFast has a REST API on every plan, an OAuth MCP server, a CLI and a ChatGPT app in developer preview. A read API and an MCP server for Claude, Cursor and ChatGPT are in v1.1 for ProductLense; a CLI is not planned yet. datafa.st/mcp
- Alerts and a weekly report. DataFast emails on goals and payments, on traffic spikes, and weekly. In v1.1 for ProductLense, with Slack as well as email. datafa.st/changelog
- Filter operators, saved segments, city and hostname. DataFast filters by is, is not, contains and does not contain, saves segments, and breaks down by city and hostname. In v1.1 for ProductLense. datafa.st/docs/datafast-filters
- Insights board and chart notes. DataFast shows days and visits to purchase, a conversion heatmap and revenue by device, and notes on the chart. Path to purchase and chart notes are in v1.1 for ProductLense. datafa.st/share/66d5711aa2f1fb254ce42c0b?insights=1
- Server-side exclusions and spike protection. DataFast excludes IPs, countries, paths and hostnames on the server, and excluded traffic does not count toward usage; attack mode can switch on during spikes. In v1.1 for ProductLense. datafa.st/docs/excluding-analytics
- npm SDK, WordPress plugin and more install guides. DataFast has an npm package, a WordPress plugin and 23 install guides. ProductLense’s npm SDK and WordPress plugin are in v1.1; most install guides are already live. datafa.st/docs/npm
- Scroll goals, HTML-attribute goals, hash routing, cross-domain. All documented by DataFast. In v1.1 for ProductLense, inside a 2.3 KB script. datafa.st/docs/scroll-tracking
Not scheduled yet
- Meta Ads spend imported automatically. DataFast pulls Meta spend over OAuth. ProductLense takes manual and CSV spend today; Meta and Google Ads connectors wait on platform app review. datafa.st/docs/meta-ads-attribution
- Shopify app with cart events. DataFast installs on Shopify automatically and records add-to-cart and checkout. ProductLense reads Shopify orders and needs a theme edit; a Shopify pixel app waits on Shopify’s review. datafa.st/docs/shopify
- WooCommerce and Easytool. Native in DataFast. Not supported by ProductLense. datafa.st/docs/woocommerce
- Google Search Console keywords with revenue. In DataFast. Not in ProductLense yet; it needs Google OAuth verification. datafa.st/docs/google-search-console
- Plausible import. DataFast imports a Plausible export. ProductLense starts counting when the script is live. datafa.st/docs/import-from-plausible
- AI crawler analytics. DataFast reports crawler hits by AI company and purpose. ProductLense filters bots out and does not report them. datafa.st/docs/bot-traffic-tracking
- Mobile dashboard app and live globe extras. DataFast has iOS and Android dashboard apps with widgets, and globe replay over hours. ProductLense has React Native and Flutter SDKs for tracking apps, and a live globe with avatars and 30 minutes of replay, but no mobile dashboard app. datafa.st/docs/mobile-app
- Longer raw history and a cheaper 10k tier with revenue. DataFast keeps 3 years on Starter and 5+ on Growth, and charges $9 for 10k events with revenue. ProductLense keeps raw events 90 days with reports from aggregates, and revenue starts on Starter at $19. datafa.st/#pricing
Choose DataFast if
DataFast has more surface today: a cookie that recognises a visitor for a year, a read API, MCP, a CLI and a ChatGPT app, eight native billing integrations including WooCommerce and Easytool, a Meta Ads spend import, a mobile app, and a real business as its live demo. At 10k events with revenue it costs $9 a month; ProductLense needs Starter at $19.
- You want one visitor recognised across weeks by a cookie, without calling identify.
- You need MCP, a CLI or a ChatGPT app today.
- You sell through WooCommerce or Easytool, or want Meta Ads spend pulled in automatically.
- Your site is tiny and $9 a month with revenue decides it.
Choose ProductLense if
ProductLense shows the cost side: processor fees from the provider and ad spend from any channel come off attributed revenue, giving profit, CAC, ROAS and payback per channel, plus retention cohorts by channel. It is free up to 10k events, sets no cookies, documents how every number is counted, and its $19 Starter includes 100k events, 3 sites, funnels and journeys.
- You spend on ads in any channel and want profit after fees, not only revenue or ROAS.
- You bill through Razorpay, Chargebee, Gumroad or Creem.
- You want a free plan, INR prices, or no cookies at all.
- You want to check how every number is counted.
ProductLense vs DataFast: questions
- Is ProductLense a DataFast alternative?
- Yes. Both tools join website analytics to billing so revenue shows up next to the source that brought the customer. ProductLense adds ad spend and processor fees to that join, so the main table shows profit per channel rather than revenue alone, and it supports ten billing providers plus a payment API.
- Does ProductLense have a free plan when DataFast does not?
- Yes. ProductLense is free up to 10k events a month for one site, with no card and 30 days of history, but no billing connection. DataFast has a 14-day trial and no free plan; its Starter is $9 a month for 10k events, according to its pricing section on 11 October 2026.
- Which billing providers does each tool support?
- DataFast documents Stripe, Lemon Squeezy, Polar, Paddle, Shopify, Dodo Payments, WooCommerce and Easytool, plus a payment API. ProductLense connects Stripe, Paddle, Lemon Squeezy, Polar, Dodo Payments, Shopify, Razorpay, Chargebee, Gumroad and Creem, plus a payment API. Only ProductLense reads Razorpay, Chargebee, Gumroad and Creem; only DataFast has WooCommerce and Easytool.
- Does DataFast have visitor journeys and MCP?
- Yes. DataFast has had a Journey tab since November 2024, and offers an MCP server, a CLI and a ChatGPT app in developer preview. ProductLense has visitor journeys from Starter and an in-dashboard Ask that checks every number against the query; a read API and an MCP server are in v1.1.
- Which is cheaper, ProductLense or DataFast?
- At 10k events with revenue, DataFast at $9; ProductLense is free at 10k but without billing. At 100k both cost $19, and ProductLense includes 3 sites and unlimited team members against 1 site and 1 seat. At 1M ProductLense is $49 against $69, at 10M $149 against $169. DataFast prices above 10k come from its pricing page code.
- Can I move from DataFast to ProductLense without losing attribution?
- New attribution starts when the ProductLense script is live, because first touch is recorded on each visitor’s first event. Connect your billing provider and ProductLense backfills 12 months of payments, so revenue history appears immediately; payments from before the script was installed show as unattributed until those customers return and identify.
Free up to 10k events a month. No card.
Add the script, connect Stripe or any of 14 other billing providers, and see revenue by channel the same day.