Instant's OpenAI exit comes with a due date: hosted apps stop on August 31st, 2027

Instant's own migration guides put a production AWS deployment at at least $600 a month before engineering and operational work ^[8]. Call that $7,200 a year ^[16] in infrastructure, and read the invoice as the smaller half of the bill. Self-hosting hands back database operations, monitoring, email delivery and scaling ^[9], and those are salaried hours spent on a system whose four maintainers now work somewhere else ^[2].

The spread inside Instant's own estimates says most of it. Between the $30-a-month VPS tier and the AWS tier there is a factor of twenty ^[17], which is the distance between a deployment you look at when it breaks and one that has users behind it ^[8].

Then the population. Instant reports more than 17,000 users, 400,000 apps and roughly 2.5 billion transactions, all lifetime and all company-reported ^[10]. Divided out, that is about 23.5 apps per user ^[18] and around 6,250 transactions per app across the platform's life ^[19]. Averages that thin describe a corpus dominated by things built once and abandoned. Most of the 400,000 will never be migrated because nobody is left who remembers making them. The real exposure is the unnamed fraction with production traffic, and Instant did not publish an active-app count, Instant Cloud revenue, or the share of usage that came from paying customers ^[11].

That gap matters given the reason the founders offered. Instant said most users had begun reaching the product through agents rather than through a conventional developer workflow ^[12]. An app scaffolded by a coding agent has a data layer nobody chose deliberately: a graph-shaped model, a permissions layer, a client-side triple store, and Postgres as the server-side source of truth ^[13]. The self-hosting path assumes an operator who understands all four. The cohort that grew fastest is the least likely to have one.

The wind-down terms are tidier than most. Subscriptions started after July 31st, 2026 are refunded ^[6], existing apps run until the August 31st, 2027 shutdown ^[3], and backups stay reachable for twelve months past that ^[20]. Nothing in the announcement offers a refund to anyone already paying before that July cutoff ^[6], so the customers with the deepest Instant dependency are the ones funding the notice period.

None of this reads as a financing event. There was no purchase price and no financial terms, and Instant described it as a team move ^[2]; OpenAI co-founder Greg Brockman had already backed the $3.4 million seed in 2024 ^[15]. OpenAI gets four engineers with direct experience of the backend that agent-written software needs. The customer base gets Apache 2.0 ^[7] and a date. That license is the only reason this is a port rather than a rewrite from nothing, and taking the port means staffing the work Instant Cloud used to sell.