The archive · Small Business & Money · Product decision · 2023–2024
TypingMind: a solo dev's ChatGPT front-end hits $1M in 20 months
Solo developer Tony Dinh ships TypingMind, a better UI for ChatGPT, in days — $22K in its first week and $1M in revenue within 20 months, reported monthly.
TypingMind
What it had to solve
After Twitter's API repricing broke his Twitter tool Black Magic, Vietnamese solo developer Tony Dinh had a big audience (130K+ followers) and a proven 'ship fast' habit; when ChatGPT launched, he saw the gap between the raw web app and what power users wanted.
How it works
Tony Dinh, a solo developer in Vietnam, spent 2021–2023 building Black Magic, a Twitter power-user tool that peaked at $14K a month. When Twitter repriced its API, the economics broke overnight; he sold the company for $128K and walked away with a public audience and a lesson about platform dependence.
Days after ChatGPT launched, Dinh shipped TypingMind: a desktop/web front-end that lets power users talk to many models, bring their own API keys, and store data locally. It launched in March 2023 as a one-time purchase and took in $22K in its first seven days; he reported the numbers monthly on his newsletter.
By November 2024 the product had crossed $1M in revenue over the trailing 12 months — 20 months from launch. A Team version for internal AI platforms was becoming the growth line, closing deals including a 3,000-seat enterprise contract, and B2B reached about half of monthly revenue. The Indie Hackers story recorded ~$45K/month and an audience of 130,000 followers built in public.
Why it lands
- It proves an interface layer can be a standalone business even when the model belongs to someone else.
- One-time pricing plus an optional team tier lowered buyer friction and removed subscription anxiety.
- Building in public — income reports, milestones, lessons — became the entire marketing engine, since paid ads failed.
- A large audience from a previous product gave the launch instant distribution.
What it did
TypingMind passed $1M in trailing 12-month revenue by November 2024 — 20 months after launch — with one-off sales still about 50% of monthly revenue; it closed enterprise deals including a 3,000-seat contract, and an Indie Hackers profile recorded ~$45K/month.
What you can take
You don't need to own the platform: a superior interface on someone else's model is a real business, and publishing revenue numbers builds trust and distribution at once.
Since then
After the $1M milestone, Dinh kept TypingMind as his main product while working about four hours a day, hired a small team, gained SOC 2/HIPAA/GDPR compliance, and expanded branded resellers in regions that need hand-holding. He continued publishing monthly updates with revenue figures, making the income report itself part of the brand.
Sources
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