What's actually included in the free Hobby plan?

1 project, 100 bug reports per month, 1,000 behavioral events per month, and 7-day session replay retention. AI postmortems and Slack alerts are included. No credit card. No expiration. Use it for a side project or to evaluate Blocfeed before bringing it to your team.

How is this different from FullStory or LogRocket?

FullStory and LogRocket are session replay tools. Blocfeed includes session replay — plus behavioral signal detection, user-submitted bug reports, and AI-written postmortems on every issue. With volume-based pricing starting at $19/month (see our pricing page), it's typically a fraction of FullStory's entry tier. Most teams cancel their replay tool in the first month.

How is this different from Sentry or PostHog?

Sentry catches errors that throw — JavaScript exceptions, server errors, crashes. PostHog records sessions and analytics. Blocfeed sits next to both, catching the silent UX issues those tools weren't designed for: rage clicks on dead buttons, forms that fail without a thrown error, redirect loops, and bugs users describe in plain English. Most teams run Blocfeed alongside Sentry, not instead of it.

How is this different from Lucent?

Lucent watches your session replays passively. Blocfeed watches replays, detects behavioral signals, accepts user-submitted bug reports, and writes a postmortem with ranked root causes for every issue. Lucent is great if you only want passive AI on top of your existing analytics. Blocfeed is the full feedback loop in one widget — passive and user-reported.

What's the MCP server? Do I need it?

MCP (Model Context Protocol) lets AI editors like Claude Code and Cursor talk to external tools securely. Blocfeed ships an MCP server, so you can ask Claude things like "what issues spiked on /checkout this week?" and it queries your Blocfeed data live — no SDK, no copy/paste from the dashboard. Setup is one line in your editor's MCP config plus your project key. It's optional. Everything still works through the dashboard if you don't use Claude or Cursor.

Can I track custom events with Blocfeed?

Yes. Call `BlocFeed.track('event_name', { property: value })` anywhere in your code — checkout completed, plan upgraded, feature opened. Events stream to Blocfeed with the user, session, and page URL automatically attached. Query and chart them from the dashboard or directly from Claude via MCP. Up to 100 events per batch, 90-day retention by default.

How does the AI postmortem work?

Every issue created from a behavioral signal gets analyzed by GPT-4o-mini using the linked session events, page URL, selector, and recent traffic patterns. Output is validated against a strict schema before it lands in the dashboard. Costs ~$3–5/month at typical traffic. The disclaimer 'AI suggestion — verify before acting' is on every report. We treat it as a starting hypothesis, not a verdict.

Will it slow down my app?

No measurable overhead on page load or runtime. The widget loads asynchronously, the replay recorder buffers in memory and flushes every 30 seconds, and behavioral detectors run passively without instrumentation. We dogfood Blocfeed on our own production app — there's no perceptible difference with it on or off.

What frameworks do you support?

Anywhere you can include a script tag. The hosted script (`https://cdn.jsdelivr.net/npm/blocfeed@0/dist/script.js`) drops into PHP, WordPress, Webflow, Shopify, or raw HTML and brings the feedback button, session replay, behavioral signals, heartbeat, and custom event tracking with it. React and Next.js teams can use the NPM package directly for the full feature set (element-level screenshots, screen recording, custom theming) or the passive build for tracking only. Three install paths, one product.

What data is collected from my users?

Session replay masks every input value by default. Password, email, and phone fields are unmaskable — the masking is structural, not a flag. Add `data-blocfeed-block` to any element to exclude it entirely from recording. Behavioral signals capture CSS selectors and event metadata, never page content. We do not sell data, do not use it to train models, and store nothing at OpenAI (requests use store=false).

Not yet. If your security team requires it, email hello@blocfeed.com — we're tracking demand and a self-hosted option is on the roadmap once we hit critical mass.

Do you offer annual billing?

Yes. The Team plan is $470/year when paid annually — equivalent to $39.17/month, a 20% discount. 30-day no-questions refund on annual plans.

Catch the bugs your users won't tell you about

Thebugtrackerthatwritesthepostmortemforyou.

Name: Blocfeed
Availability: InStock
Author: Blocfeed

Session replay, behavioral signals, and AI-written postmortems in one drop-in widget.

Install in 2 minutes

Free for 1,000 sessions · no credit card

AI POSTMORTEM · LIVE

listening

Rage-click hotspot — /checkout/submit

HIGH

AI SUMMARY

Usersarerepeatedlyclickingthe'Completeorder'buttonon/checkout/submit.Theclickhandlerbindsconditionally—firesonlyafterwindow.Stripeisdefined,whichisracingwiththebuttonmount.

RANKED ROOT CAUSES

HIGHStripe.js loaded async after the button mounts.

MEDAuth token expired mid-checkout.

LOWNetwork timeout on /api/payment-intents.

The problem

Bug reports without context are just noise

Your users find real bugs. But when they report them through Slack, email, or Intercom, you get vague messages that create more questions than answers. Half the time, you never reproduce the bug. The user moves on. The bug stays.

bug-reports

0 min elapsed

Sarah11:42 AM

hey the checkout button isnt working

You11:45 AM

which checkout page? can you send a screenshot?

Sarah12:10 PM

sorry was in a meeting. the one after you add items

You12:12 PM

what browser? and what happens when you click?

Sarah12:15 PM

chrome i think? nothing happens when i click it

You12:18 PM

can you try again and send a screen recording?

Sarah12:34 PM

im on my phone now, ill try later

52 minutes later — you still can't reproduce it

The cost

01Which page? Which element? What browser?

02No screenshot. No URL. No device info.

03More time clarifying than fixing.

Blocfeed eliminates this thread.

One click attaches the element selector, browser, page URL, screenshot, and a full session replay — plus an AI postmortem within 60 seconds.

The full loop

Lucent watches sessions. Blocfeed closes the loop.

Most tools cover one corner of the feedback loop. Blocfeed is the only widget that does all four — passive *and* user-reported, detection *and* explanation.

01 / 04

Watch the session

Every user session is recorded passively with rrweb. Scrub, slow down, see exactly what happened.

Replaces FullStory / LogRocket

02 / 04

Detect the signal

Five passive detectors flag rage clicks, dead clicks, silent HTTP failures, form abandonment, and redirect loops.

Replaces Hotjar / PostHog

03 / 04

Receive the report

Users click the broken element to file a bug — with the CSS selector, browser, screenshot, and optional voice note attached.

Replaces Marker.io / BugHerd

04 / 04

Read the postmortem

AI writes a one-paragraph summary, ranks the likely root causes, and suggests a specific fix — before you open the alert.

Nobody else does this

Insight feeds the next session — the loop closes

Inside the postmortem

Your alert email already knows what's broken.

Every issue Blocfeed creates from a behavioral signal gets a structured AI triage report. Embedded in the dashboard. Embedded in your Slack and email alerts. So when the alert lands, you already know where to look.

1–2 sentence plain-English summary

What's happening, who's affected, and what's clearly going wrong — written before you open the alert.

Three ranked root causes

Each tagged HIGH / MEDIUM / LOW likelihood — based on session events, page URL, selector, and traffic patterns.

A specific suggested fix

Not 'investigate the issue.' An actual next step you can act on or rule out in five minutes.

Embedded in dashboard, Slack, and email

When the alert lands, you already know where to look. Thumbs feedback feeds future analyses.

issue #1247

HIGH

Rage-click hotspot — /checkout/submit

8 affected sessionslast 24 hours

AI SUMMARY

Usersrepeatedlyclickingthe'Completeorder'buttonon/checkout/submitbutreceivingnoresponse.Clickhandlerappearstobindconditionally—firesonlyafterwindow.Stripeisdefined,whichisracingwiththebuttonmount.

RANKED ROOT CAUSES

HIGHStripe.js loaded async after the button mounts; the click handler short-circuits when window.Stripe is undefined.

MEDIUMAuth token expires mid-checkout for sessions over 30 minutes; PaymentIntent creation silently 401s.

LOWNetwork timeout on /api/payment-intents; the catch block swallows the error without rendering UI feedback.

SUGGESTED FIX

Defer the button's enabled state until window.Stripe is defined. Render a 'Loading payment…' state in the meantime. Verify by checking the DevTools console for 'Stripe is not defined' on the affected sessions.

Claude Code~/checkout-app

mcp: blocfeed

what issues spiked in the last 24h on /checkout?

tool·blocfeed_get_stats(window: 24h, page: /checkout)

3 high-priority issues — 47 affected sessions

#1247Rage-click on /checkout/submitHIGH8 sessions · postmortem ready

#1245Form abandonment on /checkout/billingMED23 sessions · 2 sample replays

#1239HTTP 500 on POST /api/payment-intentHIGH16 sessions · postmortem ready

show me the postmortem for #1247

tool·blocfeed_get_issue(id: 1247)

Stripe.js loads async after the button mounts; the click handler short-circuits when window.Stripe is undefined. Suggested fix: defer the button's enabled state until window.Stripe is defined.

Built for AI-native teams

Talk to your bug tracker from Claude or Cursor.

Blocfeed ships an MCP server with every account. Connect Claude Code, Cursor, or any MCP-compatible client and ask plain-English questions — list this week's issues, drill into a session, fetch the postmortem — without leaving your editor.

Plug into any MCP client

One-line install for Claude Code, Cursor, Continue, and Cline. Pin a version with npx, paste your project key, you're done.

Query feedback in plain English

"What broke on /checkout this week?" returns ranked issues with sessions and replays attached. No SQL. No dashboards to hunt through.

Drill into sessions, signals, and custom events

Step through a user's session timeline, list rage-click hotspots, chart `BlocFeed.track()` events — all from chat. The same data your dashboard sees.

Update issues without context switching

Assign, prioritize, and resolve directly from your editor. Stay in the flow you're already in — the bug context comes to you.

Passive detection

Catches what users won't tell you about

Five detectors run automatically — rage clicks, dead clicks, silent HTTP failures, form abandonment, redirect loops. Zero tagging. Zero performance overhead.

yourapp.com/checkout

Order summary

Pro plan · annual

Subtotal$588.00

Tax$48.51

Total$636.51

Secure checkout · powered by your payment provider

Behavioral signal

HIGH

Rage click on Complete order

Elementbutton.complete-order

Sessions3 in last 24h

5 detectors · runs in the background · ~8KB

The difference

Same bug. Two very different mornings.

Without Blocfeed

~52 minutes, no fix

the typical Slack thread

11:42 AMUser reports: "checkout button broken"

11:45 AMYou ask: which page? what browser?

12:10 PMUser replies (28 min later): "the one after cart"

12:12 PMYou ask for a screenshot

12:34 PMUser: "on my phone now, ill send later"

???Screenshot never arrives. Bug never reproduces.

No screenshot. No selector. No browser info. No fix. The user churns.

With Blocfeed

~10 seconds, full context

what lands in your dashboard

Issue #247 — auto-clustered

Elementbutton#checkout-submit

Page/cart/checkout

User said"Button doesn't respond when clicked. Tried 3 times."

BrowserChrome 121 / macOS

Replaylinked — 1m 47s

Behavioral+3 rage-clicks from other users

AI summaryStripe SDK not loaded before button mount

Element, replay, browser, AI postmortem. Plus 3 other users who never reported it. Fix shipped before lunch.

Everything your team needs to find and fix bugs.

Watch sessions, detect rage clicks, accept user reports, read AI-written postmortems with ranked root causes, track custom events, and query everything from Claude — all from a single drop-in install.

See all features

Session replay, automatic

Every session recorded with rrweb. Linked to bug reports and behavioral signals automatically. Scrub bar, 1x/2x/4x speed, 30-day retention. Privacy-masked by default.

Behavioral signals, passive

Rage clicks, dead clicks, silent HTTP failures, form abandonment, and redirect loops. Detected without tagging or instrumentation. Aggregated into actionable issues automatically.

AI postmortem on every issue

Summary, three ranked root causes (high / medium / low), and a specific suggested fix. In the dashboard. In your alert emails. Verify before shipping — the disclaimer is on every report.

One-click bug reports

Users click the broken element. You get the CSS selector, browser, page URL, screenshot, and an optional video and voice note. The full context, no clarification thread.

Slack, Linear, Jira, PostHog

Spike alerts in Slack with the AI summary embedded. One-click ticket creation in Linear or Jira, pre-filled with full context. PostHog session replays linked automatically.

Custom events with one line

Track anything that matters — checkout completes, plan upgrades, feature opens — with `BlocFeed.track('event_name', { plan: 'pro' })`. Query and chart from the dashboard or from Claude.

Talk to your data from Claude or Cursor

An MCP server ships with every account. Ask Claude Code or Cursor what's broken, drill into sessions, and update issues — without ever leaving your editor.

Two-minute install

NPM package or single script tag. No iframes, no extension, no measurable performance overhead. Behavioral tracking runs passively in the background.

How it works

Zero to debug in seconds

Sign up and create your project

30 seconds. No credit card. Get your unique project ID and you're past the hardest part.

Drop in the widget

One script tag for PHP, WordPress, Webflow, or vanilla HTML — or NPM for React and Next.js. Three lines of code, two minutes of work.

Replays start. Signals start. Reports come in.

Every session is recorded. Behavioral patterns surface within hours. Users start filing bug reports with full context attached automatically.

Wake up to AI-written postmortems

Issues auto-cluster from behavioral signals. Each gets a triage report — summary, ranked root causes, suggested fix — within 60 seconds of the signal firing.

Install

Install in 30 seconds.
One snippet. Any stack.

Drop a script tag into PHP, WordPress, Webflow, or vanilla HTML — or import the React package for the full feature set. Same backend, same dashboard, three install paths.

PHP, WordPress, Webflow, vanilla HTML — anywhere you can drop a script tag. Includes the feedback button, session replay, behavioral signals, heartbeat, and custom event tracking.

html

<!-- BlocFeed - paste once, works on every page -->
<script async
  src="https://cdn.jsdelivr.net/npm/blocfeed@0/dist/script.js"
  data-blocfeed-id="bf_yourproject"
  data-feedback="true"></script>

Get your blocfeed_id

What each mode includes

Feature	Any site	React	React passive
Session replay
Behavioral signals
Heartbeat
Custom event tracking
Feedback panel
Element picker
Screen recording
Custom theming

Session replay

Any site

React

React passive

Behavioral signals

Any site

React

React passive

Heartbeat

Any site

React

React passive

Custom event tracking

Any site

React

React passive

Feedback panel

Any site

React

React passive

Element picker

Any site

React

React passive

Screen recording

Any site

React

React passive

Custom theming

Any site

React

React passive

Compare

One widget. The work of three tools.

Most teams stitch this together with FullStory for replay, a separate UX analytics tool for behavioral signals, and a bug-report widget on top. Blocfeed is all three, with an AI explanation layer the others don't have.

Feature	BlocfeedFrom $19/mo	FullStory$399+/mo	Lucentmetered	Marker.io$39+/mo
Session replay
Behavioral signal detection (5 detectors)
User-submitted bug reports
AI postmortems with ranked root causes
Linked replay + report + signal
Slack / Linear / Jira / PostHog
Free tier with 1,000 sessions/mo
Install in 2 minutes (any framework)

Yes Partial Not supported

Session replay

Blocfeed

FullStory

Lucent

Marker.io

Behavioral signal detection (5 detectors)

Blocfeed

FullStory

Lucent

Marker.io

User-submitted bug reports

Blocfeed

FullStory

Lucent

Marker.io

AI postmortems with ranked root causes

Blocfeed

FullStory

Lucent

Marker.io

Linked replay + report + signal

Blocfeed

FullStory

Lucent

Marker.io

Slack / Linear / Jira / PostHog

Blocfeed

FullStory

Lucent

Marker.io

Free tier with 1,000 sessions/mo

Blocfeed

FullStory

Lucent

Marker.io

Install in 2 minutes (any framework)

Blocfeed

FullStory

Lucent

Marker.io

Pricing

Pay for what you ship. Nothing more.

1,000 sessions free. Volume-based plans from $19/mo to $499/mo up to 1M sessions. Custom pricing above that.

See pricing Start free

FAQ

Things teams ask before installing.

Pricing & plans

How it compares

How it works

Privacy & security

Other questions? Email us — we usually reply within a few hours.

Ready when you are

Catch the bugs your users won't tell you about.

Install Blocfeed in two minutes. Wake up tomorrow to filed bugs, ranked root causes, and replays of users hitting them.

Install in 2 minutes

See pricing

1,000 sessions freeFrom $19/mo for paid plansNo credit card requiredInstall in 2 minutes

Thebugtrackerthatwritesthepostmortemforyou.

Bug reports without context are just noise

Lucent watches sessions. Blocfeed closes the loop.

Watch the session

Detect the signal

Receive the report

Read the postmortem

Your alert email already knows what's broken.

1–2 sentence plain-English summary

Three ranked root causes

A specific suggested fix

Embedded in dashboard, Slack, and email

Rage-click hotspot — /checkout/submit

Talk to your bug tracker from Claude or Cursor.

Plug into any MCP client

Query feedback in plain English

Drill into sessions, signals, and custom events

Update issues without context switching

Catches what users won't tell you about

Pro plan · annual

Rage click on Complete order

Same bug. Two very different mornings.

Everything your team needs to find and fix bugs.

Session replay, automatic

Behavioral signals, passive

AI postmortem on every issue

One-click bug reports

Slack, Linear, Jira, PostHog

Custom events with one line

Talk to your data from Claude or Cursor

Two-minute install

Zero to debug in seconds

Sign up and create your project

Drop in the widget

Replays start. Signals start. Reports come in.

Wake up to AI-written postmortems

Install in 30 seconds. One snippet. Any stack.

One widget. The work of three tools.

Pay for what you ship. Nothing more.

Things teams ask before installing.

Pricing & plans

How it compares

How it works

Privacy & security

Catch the bugs your users won't tell you about.

Install in 30 seconds.
One snippet. Any stack.