Sandboxer vs KakaoCloud Virtual Machine

KakaoCloud Virtual Machine is the VM service of Kakao Enterprise's public cloud, run from a Seoul region with three availability zones plus government regions. It is a general cloud VM service billed on instance time, including while stopped; Sandboxer is a sandbox for agents with memory-preserving pause and per-port URLs. Pick KakaoCloud for workloads that must stay in Korea or need Windows or GPU instances; pick Sandboxer for pausable agent workspaces.

Checked against KakaoCloud Virtual Machine's public docs on October 28, 2026. Sources are linked in the table and listed below.

At a glance

Sandboxer and KakaoCloud Virtual Machine compared
Capability	Sandboxer	KakaoCloud Virtual Machine
Isolation	microVM Cloud Hypervisor, its own kernel	full VM Hypervisor-based virtual machines; hypervisor not named
Full Linux with root	Ubuntu 24.04, sudo, systemd
Docker inside	Preinstalled
Nested virtualization (/dev/kvm)
Pause and resume with memory	Running processes come back	A stopped instance keeps its resources allocated and is still billed; shelving releases resources and stops billing, but no RAM-preserving pause is documented
Fork a sandbox	Copy-on-write disk copy that boots fresh	Volume snapshots exist (quota of 1,000 per project) but cloning was not documented on the pages read
HTTPS URL per port	Private with a token, or public	Public IPs per instance; no managed per-port URLs found
Longest session	No limit on paid plans Auto-stop is up to 30 days or off
Billing	Per second, flat rate per size Stopped sandboxes are free	by instance usage time; hourly rates vary by size; stopped instances still billed Exact prices are on the KakaoCloud pricing guide, not the docs; shelved instances are not billed
GPUs		Accelerated computing instance family and Ubuntu GPU OS images
Self-host or open source
Regions	US East (Virginia) and EU Central (Finland)	kr-central-2 (Seoul, 3 AZs + 1 planned); kr-gov-central-1/2 for public institutions kr-central-1 was discontinued on 2025-03-31

= not documented publicly.

Where KakaoCloud Virtual Machine is strong

Data stays in Seoul, with separate government regions for public institution customers.
Instance families cover general purpose, compute, memory and accelerated (GPU) computing.
Default images include Ubuntu, Rocky, AlmaLinux, CentOS Stream and Windows Server.
General-purpose types go up to 96 vCPU (384 GiB on VMs, 512 GiB on bare metal).

Where Sandboxer differs

KakaoCloud runs in Korea only; Sandboxer runs in us-east and eu-central.
A stopped KakaoCloud instance is still billed; a stopped Sandboxer sandbox costs nothing and resumes with its processes.
KakaoCloud offers GPU instances and Windows images; Sandboxer has neither.
Sandboxer ships coding agents, a prompt API and per-port HTTPS URLs; KakaoCloud is a general VM service.

Pick KakaoCloud Virtual Machine if

Your workload or data must stay in South Korea, or you are a Korean public institution.
You need GPU instances or Windows Server; Sandboxer has neither.

Pick Sandboxer if

You want pausable agent sandboxes that cost nothing while stopped.
You want coding agents preinstalled and any port as an HTTPS URL.
You want per-second billing and a simple published price per size.

Sources

Products change. If something here is out of date, email hello@sandboxer.com and we'll fix it. KakaoCloud Virtual Machine is a trademark of its owner. Sandboxer is an independent product and is not affiliated with KakaoCloud Virtual Machine.

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