OpenComputer (site) gives each AI agent a real, disposable Linux machine — with ffmpeg, chromium, git and anything else you install — that hibernates and resumes between runs. It's freemium: $10 free credit to start, then paid plans from $20/month (Pro, with a 10× prepaid credit multiplier), plus pay-as-you-go model-call rates at API cost. If that's more than you want to spend, here are four alternatives that do a similar job — agent sandboxes or agent-native computers — for less, starting with the free ones.
| Product | Free tier | Starts at | Best for |
|---|---|---|---|
| Agent | Yes | Not stated (open-source) | Local, privacy-minded multi-app computer-use workflows |
| Open Computer Use | Yes | Not stated (open-source) | Running untrusted AI-generated code in sandboxes |
| Construct Computer | Yes | $9/mo | Persistent agents doing day-to-day business tasks |
| Matrix OS | Yes (3-day trial) | Not stated | Teams wanting a shared cloud computer for agents |
Agent – A Local Computer-Use Operator for macOS
Agent (site) is an open-source framework, built on the Computer project, for running computer-use workflows that span multiple apps inside isolated macOS/Linux sandboxes. It works with local Ollama models for privacy or cloud providers like OpenAI and Anthropic. It suits developers who want to self-host and control the runtime rather than pay for a hosted service. No pricing is mentioned anywhere — it's a GitHub project, not a hosted product, so you'll need to run and maintain the sandboxes yourself.
Open Computer Use
Open Computer Use (site) is an open-source project from E2B, the team behind sandboxed runtimes for untrusted AI-generated code. It's built for developers who want a coding runtime for LLMs and are comfortable self-hosting on GCP, with AWS and Azure support in progress. No pricing is stated since it's a free, open-source repo rather than a managed service. The tradeoff: you get the code, not a support contract, so setup and maintenance are on you.
Construct Computer – Agentic Cloud OS for Daily Work
Construct Computer (site) gives autonomous agents ("Constructs") persistent compute, storage, and network identity, visible through a desktop OS interface, so they can handle recurring work like scheduling, document prep, research, and meetings. It suits people who want an always-on agent rather than a per-session sandbox. Pricing is freemium with a 7-day Pro trial, then Lite at $9/month, Starter at $59/month, and Pro at $299/month. The jump from Lite to the higher tiers is steep, so check which tier you'd actually need before committing.
Matrix OS
Matrix OS (site) offers a cloud computer shared by a person and their agents, positioned as freemium with a 3-day free trial (card required, $0 today). It suits teams wanting one cloud environment both humans and agents can work in. The stated pricing page doesn't specify paid-tier costs, so you can't compare it on price against OpenComputer or the others until you sign up and see the plans. That's a real limitation if budget is your main filter.
How to choose
If you just need a free, self-hosted sandbox and don't mind running the infrastructure yourself, Agent or Open Computer Use cost nothing but your own hosting. If you want a persistent, always-on agent handling ongoing business tasks and are willing to pay from $9/month, Construct Computer is the cheapest hosted option with a stated price. If you want a shared human-plus-agent cloud computer, Matrix OS is worth trying during its free trial, but confirm actual paid pricing before relying on it. OpenComputer remains the option to compare against if you specifically need per-session Linux machines with hibernate/resume and pay-as-you-go model billing.
FAQ
Is there a truly free alternative to OpenComputer? Yes — Agent and Open Computer Use are both open-source with no stated price, though you self-host them.
Which alternative is cheapest with a stated hosted price? Construct Computer, at $9/month for its Lite plan.
Does any alternative match OpenComputer's per-session Linux machine model exactly? None of the four state that exact feature set; check each product's page for how their sandboxes or cloud computers actually work before switching.