Thunderbit vs CommentGrab

The Thunderbit alternative
with no credits to run out of

Thunderbit is an AI web scraper that charges a credit for every row it extracts and sends the page to its servers and Google Gemini. For comments and reviews, CommentGrab exports the whole thread free, in your browser. The comparison below is sourced from Thunderbit's own pages.

Add to Chrome, it's free Jump to the table

Last checked 13 Oct 2026Sourced from their public pagesNo account needed

Skip Thunderbit's $15/mo Starter plan $180 a year, for everyday comment exports

At a glance	Thunderbit	CommentGrab
Price	Free 6 pages a month, then $15/mo or $38/mo	Free on every platform
How it charges	1 credit per row, 2 with subpages	Nothing to charge
Refunds	None for unused time or credits	Nothing to refund
Where the page goes	Their servers, then Google Gemini	Stays in your browser
Source code	Closed source	Public on GitHub
Verdict	Built for AI extraction on any site, with enrichment.	Pick CommentGrab for comment and review exports at no cost.

Where CommentGrab wins

A 1,000-comment thread
costs you nothing

Thunderbit counts 1 row as 1 credit, or 2 with subpage scraping. Starter gives 500 credits a month for $15, so one YouTube video with 800 comments uses more than a month of it. The free plan covers 6 pages a month.

CommentGrab has no credits. It reads the thread on the page you're on, with replies where the site has them, and exports it as CSV, JSON or Markdown. If you want AI analysis, it uses your own OpenAI key and you pay OpenAI for the tokens.

A CommentGrab CSV export in a spreadsheet with author, time, score, depth, reply and permalink columns

What users report

Common complaints
about Thunderbit

From Thunderbit's 1-2 star Trustpilot reviews (TrustScore 3.0 from 31 reviews, 16 negative reviews visible) and its 10 most recent Chrome Web Store reviews, checked 13 Oct 2026.

Overall rating: TrustScore 3.0 from 31 reviews, and 4.1 from 217 ratings on the Chrome Web Store. The cards below come from the 16 negative Trustpilot reviews we could see.

10 of 16 negative Trustpilot reviews

Support you can't reach

Reviewers describe an AI support bot, no human reply and ignored cancellations.

“AI customer support that is impossible to contact.”Trustpilot review, source, 29 Jun 2026

CommentGrab: There's no subscription to cancel. Questions go to the developer through the contact form.

8 of 16 negative Trustpilot reviews

No refunds

Users who asked within days of paying were refused.

“was told I could not get a refund as it was not their policy”Trustpilot review, source, 25 Mar 2026

CommentGrab: It's free, so there's never a charge to dispute.

7 of 16 Trustpilot, 2 of 10 recent Chrome Web Store

Unexpected charges

Annual plans charged upfront when users expected a monthly price.

“charged $199 without consent”Trustpilot review, source, 30 Mar 2026

CommentGrab: No card, no plan, no account.

5 of 16 negative Trustpilot reviews

Failed runs still burn credits

Runs that loop or stop early still use up credits.

“when it doesn't you still burn through credits”Trustpilot review, source, 5 May 2026

CommentGrab: If a capture stops, you keep what loaded and can run it again. Nothing is counted.

Thunderbit
vs CommentGrab, side by side

Checked on 13 Oct 2026 against Thunderbit's own pages. Something changed? Tell us.

	Thunderbit	CommentGrab
Works on	Any site, with templates for Amazon and others	13 comment and review sites
Comment replies	Depends on what the AI extracts	Nested where the site has threads
Free usage	6 pages a month, 30 credits a page	No limit
Pagination on free	Not included	Loads the full thread
Export formats	Excel, Google Sheets, Airtable, Notion, CSV	CSV, JSON, Markdown, clipboard
AI	Extraction and enrichment, on credits	Research insights on your own OpenAI key
Account	Needed to track credits	None
Page content sent out	To their servers and Google Gemini	Only to OpenAI, when you run an analysis
Source code	Closed	Public (PolyForm Shield)

Thunderbit pricing
vs CommentGrab pricing

Thunderbit sells monthly credits. Yearly plans are cheaper per month, and all yearly credits are paid upfront.

Thunderbit

Free: 6 pages a month$0
Starter: 500 credits a month$15 / mo
Starter, billed yearly: 5,000 credits$9 / mo
Pro: 3,000 credits a month$38 / mo
Refunds for unused creditsNone

Source: Thunderbit pricing page, 13 Oct 2026.

CommentGrab

Every platform, every export$0
Account or sign-upNone
AI analysisYour OpenAI key

For everyday comment exports you can skip the $15/mo Starter plan ($180 a year).

With AI analysis you pay OpenAI directly for the tokens you use.

What Thunderbit
is built for

Thunderbit is the better pick when you need AI to pull structured fields from sites with no dedicated tool.

AI extraction on any page

Describe the fields you want and it fills a table, including subpages. CommentGrab only reads the 13 sites it supports.

Enrichment and integrations

It enriches contacts and sends results to Google Sheets, Airtable and Notion, with an API, a CLI and an MCP server.

How to switch
from Thunderbit

It takes a couple of minutes, and you don't need an account.

Install CommentGrab.

Add it from the Chrome Web Store. No account and no card.

Open the thread.

Go to the YouTube video, Reddit post or product page you were scraping.

Click the widget and export.

Pick CSV, JSON or Markdown. Paste the CSV into Google Sheets if that's where you work.

Thunderbit
alternative FAQ

How much does Thunderbit cost?

On 13 Oct 2026: a free plan with 6 pages a month, Starter at $15 a month for 500 credits ($9 a month billed yearly) and Pro at $38 a month for 3,000 credits. One row is one credit.

Does Thunderbit give refunds?

Its pricing page says Thunderbit does not offer refunds for unused time or credits.

Is there a free Thunderbit alternative for comments?

CommentGrab exports comments and reviews from YouTube, Reddit, Amazon, Trustpilot, Google Maps and 8 more sites for free, with no credits.

Does Thunderbit send page data to AI?

Its privacy policy says page HTML goes to Thunderbit's servers and is then sent to Google Gemini for processing. CommentGrab only contacts OpenAI, with your own key, when you start an analysis.

Other comparisons

ExportComments alternative100 free results, then a paid plan Instant Data Scraper alternativeFree, collects browsing data per its policy Apify alternativePay per 1,000 comments

Export comments free,
with no account

Install CommentGrab, open a supported thread and export every reply in seconds.

Add to Chrome

A 1,000-comment threadcosts you nothing

Common complaintsabout Thunderbit