Updated October 2026
Sunset: a wind-down service that buys your startup's data
Sunset handles the legal, tax and operational work of shutting a startup down, and it has added a data business. Its blog says it checks whether a company's data qualifies, buys the dataset outright, and licenses it to AI labs itself. MIT Technology Review called it a rapidly growing data resale business.1,2
Key facts
Sunset in its own words and others'
| Fact | Value and source |
|---|---|
| How Sunset buys data | Evaluates whether a wound-down company's data qualifies, buys the dataset outright, then licenses it to AI labs; says it is not a broker |
| How Sunset values data | By head count, years in operation, volume of data and how the team used its tools |
| Sunset's main service | Handles the legal, tax and operational work of winding down a startup, and sells, assigns, auctions or licenses its assets |
| Sunset company details | Sunsets HQ Corp., a Delaware corporation; founder and CEO Brendan Mahony (Y Combinator 2018) |
How it buys
An outright purchase, not brokerage
Sunset says it does not act as a broker or ask founders to run a process: it buys the dataset directly. That differs from its general asset pages, which describe selling, assigning, auctioning or licensing assets to the right buyer on the founder's behalf. Ask which model applies to your data.2,1
Its blog treats Slack threads, product specs and code repositories as the assets that matter, the everyday records a software startup leaves behind.2
Valuation
How Sunset prices a dataset
According to MIT Technology Review, Sunset values a client's assets by head count, years in operation, volume of data and how the team used its tools. Sunset does not publish prices or the share founders receive.3
For scale, its rival SimpleClosure reports 150+ data deals at typically $10K-$100K each, and says 47% of its deals now include code or data.4,5
The company
Who runs Sunset
Before you agree
What to ask Sunset
Ask whether Sunset buys your dataset outright or sells it for you, because that decides who carries the risk and who keeps the upside. Ask what share of any later license revenue, if any, comes back to the company or its investors, and how names and personal details are stripped from employee messages before a lab sees them.2,1
Check first
How to check Sunset, or any buyer
The same checks for every company we profile. We state facts; you decide.
- 1.Find the company behind the ad: a legal name, a registered address and named people.
- 2.Ask for a written offer and a sample agreement before you send any data.
- 3.Ask who removes personal data, by what method, and approve it before anything is exported.
- 4.Ask which AI labs will receive the data, and whether you will be told.
- 5.Ask how they are paid: by you, by the buyer, or from a share of your deal.
- 6.Get terms from at least one other buyer before you answer.
FAQ
Questions, answered with sources
Yes. Its blog says it buys qualifying datasets outright from wound-down companies and then licenses them to AI labs.2
MIT Technology Review reports it looks at head count, years in operation, data volume and how the team used its tools.3
Every business is different, so this one is best talked through with the buyer you're working with. Their team goes over it with you before anything is signed.
Before you sign
Questions to talk through with your buyer
Every business is different, so these are best talked through with the buyer you're working with. Their team goes over them with you before anything is signed.
Questions for this kind of business
- Is this an outright sale of the dataset, and what happens to copies we keep?
- Who owns this data: the company, an estate, or someone else?
- How are employee data, union contracts and NLRA questions handled?
Questions for any buyer
- Is the license exclusive, and for how long?
- Can you sublicense the data, and to whom?
- Which AI labs will receive it, and will you tell us?
- How long do you keep it, and how is it deleted?
- What is your liability cap, and who indemnifies whom?
- Will the contract ban re-identification of people in the data?
- Who removes personal data, by what method, and do we approve it first?