Billing & plans
One subscription, a set number of agents, flat prices for extras. No meters, no hourly rates: how much your agents run never changes the bill.
Plans
A plan includes a number of agents; every agent gets the same base allocation (2 GB RAM, 5 GB SSD, auto-sleep when idle). Sleeping agents keep their full state and count toward the included number, not toward any extra charge.
| Plan | Price | Included machines | Awake at once | Extra machine |
|---|---|---|---|---|
| Free | $0 | 3 | 1 | Upgrade to add more |
| Starter | $20/mo | 20 | 5 | $1.50/mo |
| Growth | $100/mo | 100 | 25 | $1.25/mo |
| Scale | $500/mo | 500 | 60 | $1.00/mo |
A machine is one micro-VM, and the plan does not care which kind. An agent is a machine, and so is a Computer, the persistent Linux desktop your model drives over MCP. A $20 plan therefore holds 20 agents, 20 Computers, or any mix of the two. Computers need a paid plan; the free plan runs agents. Awake at once is how many may run at the same time; sleeping machines are free and do not count, and a wake past the limit answers 429 with a retry hint rather than running slowly.
The subscription is charged when you subscribe and on each monthly renewal. The two kinds of extras bill differently: extra machines are flat monthly slots (prorated to the cycle end when you first buy one; a slot stays bought, and billed, through the end of the cycle even if you delete the agent), while add-ons (extra RAM, extra SSD, always-on) are counted per day of use and billed in arrears on the next invoice, so an add-on that only existed for a week costs a quarter of its monthly price. Canceling keeps the plan through the paid period, then drops the account to the free tier.
Add-ons
Add-ons are flat per-agent monthly prices, set per agent at creation or resized later from the agent's settings. Self-serve ceilings are 8 GB RAM and 100 GB SSD per agent.
| Add-on | Unit | Starter | Growth | Scale |
|---|---|---|---|---|
| Extra RAM | per GB above the base 2 GB | $3/mo | $2.50/mo | $2/mo |
| Extra SSD | per 5 GB above the base 5 GB | $2/mo | $1.50/mo | $1/mo |
| Always-on | per agent, opts out of auto-sleep | $20/mo | $20/mo | $20/mo |
Always-on is for agents that must react in milliseconds, around the clock; everything else sleeps when idle at no cost. Sleeping is not unreachability: any request to a public agent URL, webhook, or trigger wakes the agent automatically (about a second), so most public web agents do not need always-on. The API reports which mode an agent is in as sleepPolicy (the legacy tier field is a retired label and does not reflect sleep behavior).
Estimate your bill
Drag the sliders; the calculator picks the cheapest plan and itemizes the estimate from the tables above. The Billing page in the dashboard is authoritative.
Cheapest plan picked automatically. Hosting only; model calls draw on separate prepaid AI credits, and nothing here is usage-metered.
Free tier
Free accounts get 3 agents forever, all of which can run at once. Base allocation only: no add-ons, no extra agents. It exists so you can genuinely build and test before paying, not as a trial that expires.
AI credits (model calls)
Model calls are separate from hosting. Agents created without your own key route through the Maritime proxy and draw down prepaid AI credits at provider list price; buy more from the Billing page, and each purchase gets a Stripe receipt. New accounts start with a $5 welcome credit; the unspent part expires 30 days after signup, while credits you buy never expire. Bring your own OPENAI_API_KEY on any agent and that pool is never touched: you pay your provider directly.
Failed payments
If a renewal charge fails you get a 14-day grace period (with email reminders) during which everything keeps running. After that, agents are put to sleep with their state preserved until payment succeeds, and unpaid add-on days are settled automatically on the next successful charge.
Watching spend
The Billing page reads as a statement: the next charge and its date, the card on file, the AI credits left, and then the plan. It shows the machines used against the included number, and the add-ons in use with their per-day rate. Computers appear in that same machine count, because they are machines. Every invoice, with a PDF receipt, is listed at the bottom. Plan changes and cancellations start on the Billing page and finish on Stripe, which shows the exact amount before anything is charged.