DataFast vs PostHog (2026): which should you pick?
As of Nov 13, 2026, we pick PostHog: it is second in our ranking of website and product analytics tools, and it grades higher too, 3.2 against 2.6.
Checked Oct 18, 2026 and Nov 13, 2026 · graded Oct 18, 2026 and Nov 13, 2026 by ToolGPA
PostHog grades higher on value for money, the free plan and features. They get the same grade on ease of use and platforms.
Price, platforms and features side by side. The table says where each price was read and when.
DataFast
Revenue-first web analytics that ties traffic to paying customers
PostHog
Open-source product analytics with replays, flags and surveys
Which one is for you
Pick DataFast if
- Fits if you run a small SaaS or store and want revenue tied to visits
- Works for people moving from Plausible
Look elsewhere if
- Not for you if you want a free plan, as there is none after the 14-day trial
- Tight if your traffic spikes, as past your tier you must upgrade to see the dashboard
- Watch out: social media mentions and link attribution need Growth
- Watch out: a Google Analytics import is listed as coming next, and the default script may need a cookie banner
Pick PostHog if
- Fits if you're a startup that wants analytics, replays and flags within the free allowance
- Works for developers who want to go from a broken session to the error behind it
Look elsewhere if
- Skip it if you just want simple visitor counts without learning a whole toolkit
- Pricey if you need SSO or a HIPAA BAA, which take Boost at $250 a month on top of usage; SAML takes Scale at $750
- Not for you if you want a fixed monthly bill, as everything past the free allowance is metered
- Tight if you stay free, with 1 project, recordings kept a month and events dropped past the limits
- Watch out: self-hosted PostHog is officially unsupported, with no tagged releases or paid support
How we grade them
| 2.6GPADataFastGood | 3.2GPAPostHogVery good | |
|---|---|---|
| Value for money | B$9 a month for 10k events is inside the cheaper quarter of analytics tools, and the price rises with the event tier. | AA site with 10,000 visitors a month fits in the free 1M events and 5,000 recordings, so the figure is $0. There's no base fee after that, just usage from $0.00005 an event. Boost, at $250 a month, is only for SSO, HIPAA and more projects. |
| Free plan and trial | CA 14-day trial with no card, and no free plan. | BNo card and no time limit: 1M events, 5,000 recordings, 1M flag requests and 1,500 survey responses every month, with unlimited members. Usage stops at the limit, so no surprise bill. You get 1 project, and recordings are kept a month. |
| Features | BRevenue attribution, goals, funnels, live visitors, an API, CLI and MCP cover the whole job of web analytics. | AAnalytics, web analytics, replays, flags, A/B tests, surveys, error tracking, logs and a data warehouse with pipelines in and out. Graded against Amplitude, Mixpanel and Heap, it covers the whole job, and none of them bundles errors, logs and a warehouse too. |
| Ease of use | CA script and revenue connections to set up, and no store rating on record. | CNo rating on record. The cloud version is a snippet and a sign-up, but there are a lot of products to learn and events to plan. The free self-hosted version is a Docker deploy PostHog doesn't officially support, which is a developer's job. |
| Platforms and integrations | BWeb, with WordPress, Shopify, Webflow, Framer, Wix, Squarespace and Google Tag Manager. | BWeb only, so it can't reach an A. It pulls data in from Stripe, HubSpot, Salesforce and Postgres, sends events out to Braze, Klaviyo and others, and works with Snowflake, BigQuery and Zendesk. |
| Best for | web analytics tied to revenue | a whole product toolkit on one free allowance |
The GPA is the average of the five grades: an A is 4 points, an F is none. The full reasons are on each tool's page: DataFast and PostHog. How we grade
Where they differ
- PostHog is open source and self-hostable, according to its own site.
- DataFast also covers dashboards.
- PostHog also covers surveys, session replay and a/B testing.
At a glance
| DataFast | PostHog | |
|---|---|---|
| Pricing | Free trial | Free plan |
| Starts at | $9 per month for up to 10k events, billed monthly | $0.00005 per analytics event past the free 1M (pay-as-you-go) |
| Free plan | None | Monthly allowance that resets: 1M analytics events, 5,000 recordings, 1M flag requests, 1,500 survey responses, 100K exceptions. Unlimited members, 1 project, 1-year retention. |
| Free trial | 14-day free trial, no card required | None listed |
| Web | ||
| Made by | DataFast | PostHog |
| Price read from | datafa.st | posthog.com |
| Checked | Nov 13, 2026 | Oct 18, 2026 |
Worth knowing
DataFast
- There is no free plan; the 14-day trial needs no card, after which a paid plan is required.
- Starter covers 1 website and 1 team member; social media mentions and link attribution need Growth.
- If you exceed your event tier, tracking continues but you must upgrade to see the dashboard.
- Data can be imported from Plausible; a Google Analytics import is listed as coming next. The default script may need a cookie banner.
PostHog
- Usage is metered per product, so the monthly bill moves with traffic; billing limits can be set for each product to cap it.
- SSO enforcement, a HIPAA BAA and unlimited projects need the $250-a-month Boost package on top of usage; SAML sign-in needs Scale at $750.
- The free plan keeps recordings for 1 month and data for 1 year, allows 1 project, and drops events past its limits.
- Self-hosted PostHog is officially unsupported and has no tagged releases; PostHog recommends always running the latest image.
Key features
DataFast
- Revenue attribution
- Links a payment processor so revenue is attributed to traffic sources and customer segments, including revenue per visitor.
- Web analytics
- Traffic reports focused on what drives growth, as a simpler alternative to Google Analytics according to the vendor.
- Goals, funnels and journeys
- Custom goals such as signups, and the path each visitor takes from first click to conversion.
- Live visitors
- Real-time visitor view with an API for acting on it.
- MCP server and CLI
- Connects to Cursor, Claude Code or Codex so traffic and revenue can be queried in plain English.
- Cookie or cookieless script
- The default script uses cookies; a cookieless script exists but is less accurate for long-term revenue attribution because identifiers rotate about every 24 hours.
PostHog
- Product and web analytics
- Funnels, trends, retention, user paths and a web analytics dashboard, built from events. The first 1M events a month are free.
- Session replay
- Recordings of real visits to see where people get stuck, linked to funnels and errors. 5,000 recordings a month are free; recordings are kept 90 days on pay-as-you-go.
- Feature flags and experiments
- Roll features out to chosen users and run A/B tests, billed together by flag requests, with 1M requests free each month.
- Surveys
- In-app surveys with 1,500 free responses a month, and white-labeled surveys on the Boost package.
- Error tracking and logs
- Captures exceptions (100K free a month) and ingests logs (10 GB free), so you can go from a replay to the error behind it.
- Data warehouse and pipelines
- Syncs data in from Stripe, HubSpot, Salesforce, Postgres and others, and sends events out to tools such as Braze and Klaviyo.
Plans
DataFast
Starter$9
per month for up to 10k monthly events, billed monthly
1 website, 1 team member, 3 years of data retention, 100K AI bot requests, and API, CLI and MCP access. The price rises with the event tier.
Growth$19
per month for up to 10k monthly events, billed monthly
30 websites, 30 team members, 5+ years of retention, plus social media mentions and link attribution. The price rises with the event tier.
PostHog
Free$0
Full free allowance on every product, unlimited team members, 1 project, community support. Usage stops at the limits, so no surprise bill.
Pay-as-you-go$0
plus usage above the monthly free allowance
No base fee. Analytics from $0.00005 an event and replays from $0.005 a recording, cheaper at volume. 6 projects, 7-year data, email support.
Boost$250
per month, plus usage
Platform package: unlimited projects, SSO enforcement, 2FA enforcement, white labeling, HIPAA BAA and 12 months of replay retention.
Scale$750
per month, plus usage
Everything in Boost plus SAML and OIDC sign-in, approval workflows, real-time alerts and priority support with an 8-hour target.
EnterpriseCustom
Sold through sales: role-based access, a dedicated account manager, training, and up to 5 years of replay retention.
Self-hosted (hobby deploy)$0
MIT-licensed Docker Compose deployment you host yourself. Officially unsupported, with no paid support plan.
Ways to pay less
DataFast
- Annual discount
2 months free with yearly billing
The pricing section's Yearly toggle carries a '2 months free' label; the yearly price itself is not shown in the page text.
PostHog
- Startups
$50,000 in credits for early-stage startups
Companies under 2 years old that have raised less than $5M get $50,000 of PostHog credit for 12 months, plus partner perks. A company email domain is required.
- Nonprofit
Discount for nonprofits
PostHog says it gives nonprofits a discount in most cases: create an account, then contact sales with details of the organization.
Common questions
Which is cheaper, DataFast or PostHog?
As of Nov 13, 2026, DataFast starts at $9 per month for up to 10k events, billed monthly, and PostHog starts at $0.00005 per analytics event past the free 1M (pay-as-you-go).
Which has a free plan, DataFast or PostHog?
As of Nov 13, 2026, only PostHog has a free plan. DataFast does not, though it has a free trial.
More comparisons
How this page was made
- The verdict at the top follows a fixed rule. When both tools are in the same category and either is in our top three for it, the verdict follows that ranking: the higher-placed tool is our pick. The top three weigh who each tool suits as well as its grades, so a pick can go against the GPA. Otherwise the page does not pick one and says which grades higher: the higher GPA first; on a tie, the one with a free plan, then the one that starts cheaper in dollars a month, counted the same way for both; if they are still level, what the choice depends on.
- The grades are our own, from each tool’s review or report card. The GPA is their average.
- Prices, plans and platforms come from each tool’s listing. The table above says where each price was read and when.
- The differences and the answers to the questions are worked out from those listings.