AI Buddy
A laid-off developer's Chrome sidebar AI assistant, 15 paying users and $435 MRR six weeks after launch
Juejin author cwsaibuddy had built projects for five years without one passing a single user; after a layoff the author cut 11 of 12 ideas in week one and built AI Buddy, a Chrome sidebar AI assistant at 29 dollars a month. In June 2026 the author wrote that six weeks after launch it had 15 paying users and $435 MRR, that the first paying user came from a reply in an old Reddit thread, and that the product would be shut down if it did not reach 35 users within 30 days.
Ledger card
BSelf-reported- Income
- $435
- Founder's own disclosure · MRR · monthly · 2026-06
- Status
- Active
- Rechecked 2026-10-21
Grade B · Self-reported: The founder's own public statement or a media report, with source and date; no platform data to check it against.
Source: Juejin: 15 paying users in six weeks — what I finally understood about indie development (cwsaibuddy) · checked 2026-10-21 · next recheck 2027-01
Tags
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- Business model
- How AI is used
- Founder and team
- Technical barrier
- Revenue and stage
Ledger summary
AI-assisted draft · facts checked by an editorAI Buddy is a Chrome sidebar AI assistant, first shipped as an alpha on the Chrome Web Store, later adding a "quick scenes" button that saves prompt templates for one-click reuse. The author posts on Juejin as cwsaibuddy, builds alone after a layoff, and says none of their projects in the previous five years passed a single user.
The article of 28 June 2026 says: six weeks after launch, 15 paying users and $435 MRR, priced at 29 dollars a month with a yearly plan. The first paying user came only in week three, five by the end of week four, 15 by week six; week five had several days of zero Stripe revenue and the author nearly quit. The author set a deadline: 35 users within 30 days or shut it down and go back to interviewing. This is the author's own account, graded B. The source is a first-person Chinese post with no English version.
Decision notes
AI-assisted analysis · based only on this case's verified facts- 1. What problem it solves
- People working in GitHub, Linear and Notion keep retyping the same kinds of prompts
- 2. Who the customers are
- Individual users working in the browser, mostly developers; 15 paying after six weeks
- 3. Why customers pay
- AI in a sidebar on any page, with common prompts saved as one-click templates; 29 dollars a month
- 4. Business model
- Subscription
- 5. What AI does in delivery
- AI-native · AI models (not named in the source)
- 6. What public data proves
- $435 · MRR · monthly · 2026-06 · Founder's own disclosure
- 7. Limits of the income data
- Grade B · Self-reported; The founder's own public statement or a media report, with source and date; no platform data to check it against; Third-party estimates, user counts, funding and price quotes are never recorded as income
- 8. What indie developers or small teams can take from it
- Cut twelve ideas to one, won the first customer by answering Reddit questions daily, then shaped the product around how paying users used it · replicability score 4/5
- 9. Biggest cost, acquisition barrier or limit on copying it
- Browsers' built-in sidebar AI is a direct threat, and the user base is still tiny; Coding: High · Startup money: None · Finding customers: Medium · On camera: Not needed
Rows 1–3, 8 and 9 are distilled by an editor from the facts recorded for this case and are not the founder's words; rows 4–7 are generated from the case fields.
Timeline
- 2026-05Alpha on the Chrome Web Store; first paying user only in week three
- 2026-06Week six: 15 paying users, $435 MRRgrade B; author's own account
How it was done
- Cutting ideas in week one: 11 of 12 killed, keeping the one that could be verified.
- No ads, half an hour a day of answering questions in r/ChatGPTCoding, r/SideProject, r/Chrome_Extensions and r/IndieHackers, mentioning the product only when relevant; the first paying user came from a reply in an old thread, and Google later surfaced that reply for another sale.
- Changing the product by watching paying users: of the first five, three used it to have AI explain PR reviews on GitHub, one for changelogs in Linear, one to proofread English emails in Notion, which led to the prompt templates.
- No approval steps on the Chrome Web Store or Stripe, so publishing cost almost nothing.
AI tools used
| Step | Tool |
|---|---|
| AI assistant features in the browser sidebar | AI models (not named in the source) |
Failures and risks
- 15 users and 435 dollars are, in the author's words, far from a million a year.
- Built on Chrome and model APIs; browser vendors' own sidebar AI is a direct threat.
- Revenue is self-reported with no third-party check; name and location are not public.
Can it be copied?
4/ 5
Editor's score out of 5, based on barriers, cost and how hard customers are to find.
Sources and evidence
- Juejin: 15 paying users in six weeks — what I finally understood about indie development (cwsaibuddy) · Founder · Chinese · published 2026-06-28 · checked 2026-10-21
Verification notes (links, dates viewed and excerpts of at most two sentences) are kept internally and never republished. Pages cite only facts and quotes of at most two sentences, always linked; data a platform's terms forbid reusing is never used as a source.
Rechecks
| Date | Status | Evidence grade |
|---|---|---|
| 2026-10-21 | Active | BSelf-reported |