On October 5, 2026, a California software company called TradeSun sued OpenAI in federal court in San Francisco over a single word: Astra.
TradeSun says it has sold AI software under the name ASTRA since 2021 and registered it as a federal trademark in 2022. Its software reads business documents, pulls out data, and screens for risk for banks and other financial institutions. Then, on September 3, 2026, OpenAI launched GPT-6 Astra and began extending the name into specialized products like “Astra for Law.”
As Bloomberg Law reported, TradeSun’s complaint says OpenAI is teaching customers that “Astra means OpenAI.” TradeSun wants a court to order OpenAI to stop using the name and to hand over profits tied to it. OpenAI has said the complaint lacks merit.
This is a brand new lawsuit. Nothing has been decided, and everything in the complaint is an allegation. But the legal theory behind it is one every small business owner should understand, because it is the theory that protects you when a much bigger company lands on your name.
The little guy was there first
Most trademark cases follow a familiar pattern. A small company borrows a big brand’s name, hoping to ride its popularity, and the big brand sues.
This case runs the other way. TradeSun isn’t accused of copying anyone. Its argument is that it was using Astra years before OpenAI, and that OpenAI’s sheer size is now drowning it out.
That’s called reverse confusion. The concern isn’t that customers will think OpenAI’s product comes from TradeSun. It’s the opposite. Customers who come across TradeSun’s ASTRA might assume it is built on OpenAI’s model, is endorsed by OpenAI, or worst of all, that TradeSun is the copycat trying to cash in on OpenAI’s brand.
In TradeSun’s words, as quoted by Bloomberg Law: “Being one of the biggest technology companies in the world does not entitle OpenAI to our trademark.”
Why this matters if you’re a small business
A lot of business owners assume that if a giant company starts using their name, they’ve lost. The giant has more money, more lawyers, and more customers, so the name is effectively theirs now.
Trademark law doesn’t work that way. Rights generally go to whoever used the name first for those goods or services, not to whoever is biggest. Reverse confusion exists precisely so that a smaller, earlier business isn’t erased when a larger company floods the market with the same name. We saw a version of this a few weeks ago when a small company’s existing trademark got in the way of Tesla and SpaceX’s Terafab plans.
What gives TradeSun a real seat at the table is its federal registration. A registration is public notice to everyone, including the world’s biggest AI company, that the name is taken. TradeSun’s complaint leans on exactly that point, arguing that a company as sophisticated as OpenAI could easily have found its registration before launching.
Registration isn’t a guarantee
There’s a twist that hasn’t made the headlines. TradeSun’s own ASTRA registration is being challenged. In April 2026, months before OpenAI’s launch, another company using ASTRA for AI software asked the Trademark Trial and Appeal Board to cancel TradeSun’s registration, alleging that TradeSun had not been using the mark the way its registration claims. That challenge is still pending, and those claims haven’t been proven either.
The lesson is simple. A registration is powerful, but it is only as strong as the use behind it. You have to actually use your mark, keep using it for the goods and services listed, and keep records that prove it. If you ever need to enforce your trademark, the other side will look hard at whether your registration holds up. (If you’re on the other end of a dead registration blocking you, here’s how a trademark cancellation works.)
Big companies skip steps too
This is not OpenAI’s first naming fight this year. According to Bloomberg Law, a federal judge barred OpenAI from using “cameo” for a feature in its Sora video app in February, and another judge blocked its “io” branding for AI devices in April before that case settled in July. We’ve also written about OpenAI’s ChatGPT naming headaches before.
If one of the best-funded companies in the world can end up in court right after a product launch, a small business can too. The fix costs far less than the fight: a real clearance search before you commit to a name, not a quick Google search the night before launch. We walk through the steps in naming a product before you launch.
What to do now
- File early. A federal registration gives you nationwide notice and real leverage against a company many times your size.
- Keep using your mark, and keep proof. Save dated screenshots, invoices, and product pages showing the mark in use for what your registration covers.
- Search before you launch. Clear a new product or brand name before you announce it, not after.
- If a bigger brand lands on your name, start documenting right away. Every confused customer email, misdirected call, or “are you affiliated with them?” message is evidence. Then talk to a trademark attorney before you respond.
Worried a bigger company is crowding out your name?
Whether you’re launching a new name or watching a much larger brand show up in your space, now is the time to get clear on your rights. Indie Law has filed thousands of trademark applications for entrepreneurs, creators, and small businesses. Book a free consultation, and we’ll walk you through your options in plain English.
Sources: Bloomberg Law, “OpenAI Accused of Copying ‘Astra’ Trademark With New Model,” Oct. 5, 2026 (link); Law360, “OpenAI’s ‘Astra’ Name Causes ‘Reverse Confusion,’ Co. Says,” Oct. 5, 2026; Reuters, “OpenAI sued for trademark infringement over ‘Astra’ AI model,” Oct. 5, 2026; TradeSun Inc. v. OpenAI OpCo LLC, N.D. Cal. No. 3:26-cv-11360; BizUpUSA Holdings LLC v. TradeSun, Inc., TTAB Cancellation No. 92091356 (filed April 7, 2026).