AI bookkeeping for store owners in LINE — $1.4K MRR

Zendai is an AI bookkeeping assistant for store owners that works inside LINE. Its $1.4K MRR is verified through the payment provider's API by TrustMRR (Stripe), as of September 30, 2026.

What it actually sells

Zendai is AI bookkeeping software and an assistant for store owners using LINE. It records income and expenses through LINE chat, reads slips from photos, and answers questions about a store's numbers.

Users can ask about today's sales, this month's profit, or their biggest expense in plain language. Zendai schedules daily summaries in LINE, supports staff permissions, exports records to Excel or PDF, and lets users see and edit what it remembers.

How it charges

The pages we read do not state a price, and no currency amounts appear on those pages.

Month by month

Monthly revenue as read from the payment provider by TrustMRR, in US dollars, as of September 30, 2026.

Month	Revenue (USD)
2025-10	$391
2025-11	$701
2025-12	$1,150
2026-01	$827
2026-02	$1,286
2026-03	$871
2026-04	$1,343
2026-05	$656
2026-06	$871
2026-07	$1,243
2026-08	$1,928
2026-09	$1,508

Where customers come from

The visible distribution signal is LINE. Users can add Zendai as a friend on LINE and start recording right away, with no extra app to install. The listed audience is B2B.

What stands out

Zendai keeps bookkeeping inside the LINE chat users already use every day. It accepts transfer slips, receipts, paper bills, and non-receipts from photos, then books them in one message.

The product also answers questions from the store's own numbers and sends scheduled daily summaries into LINE. Store owners and their staff can use staff permissions, exports, and persistent store rules.

From the official site

Meet Zendai, the AI assistant that keeps your store's books in LINE.

Today's sales, this month's profit, your biggest expense. Ask in plain language and Zendai answers from your store's real numbers.

Excerpts from the official website, fetched October 1, 2026.

Where it sits in the data

Zendai's $1.4K MRR is higher than 79% of the 5,602 projects with payment-verified revenue in our dataset; the median across them is $150. Within the “Customer Support” category (188 projects) it is higher than 73% (category median $274). Snapshot: 2026-09-02 to 2026-09-30. The dataset only covers founders who chose to publish their numbers, so it leans toward businesses that work; use it for scale, not as an average.

Currency

All figures are in US dollars as published. A rough yuan or euro conversion is not applied here because prices, taxes and acquisition costs differ by country.

Could you build something like this?

My view is that this needs real work. The buyer is a store owner or staff member who wants bookkeeping records and store questions handled in a chat surface. Distribution would come from making the assistant discoverable and usable inside LINE, including the add-as-friend flow and the no-extra-app experience.

The hard parts in general terms are reliable reading of financial documents, keeping answers connected to each store's records, permissions, exports, scheduled summaries, and ongoing support. A new version would also face competition around accounting software and AI assistants.

Verdict: Needs real work.

One thing to take from it

My view is that Zendai's clearest product choice is to put a narrow bookkeeping workflow inside an existing chat surface. For a founder, the lesson is to identify the exact user and the place where the work already happens before choosing the technology.

Sources

Zendai official website, fetched October 1, 2026
Zendai pricing page, fetched October 1, 2026
TrustMRR: revenue verified through the payment provider's API by TrustMRR (Stripe), as of September 30, 2026

Revenue, team and start-cost figures are what the founder reported at the interview date, not current figures and not a prediction of what you will earn. Product and pricing facts come from the business's own website as checked on 30 September 2026. Method & sources · Disclosure