kosa8 vs Northflank

01The short verdict

Choose Northflank if

• you want sandboxes on the same platform as services, jobs, databases and CI [4];
• you need BYOC across many clouds, or Kubernetes you already run [4] [5];
• you need GPU sandboxes and 17 managed regions [1] [3];
• you need SOC 2, HIPAA and ISO 27001 paperwork today [12].

Choose kosa8 if

• sandboxes must run on developers' laptops as well as servers [14];
• you want to fork a running sandbox into live copies with memory [15];
• you want to pause without losing processes, and rewind to a checkpoint [15] [19];
• you want an egress allow-list and API keys kept outside the VM on your own machines [17].

02Northflank and kosa8, feature by feature

Bracketed numbers point to the sources. "Not documented" means the vendor's own pages did not say on 2026-11-14; it does not mean the feature is missing.

03Where Northflank is stronger

• A whole platform. Services, jobs, managed databases, CI/CD and preview environments around the sandboxes [4]; kosa8 does sandboxes only.
• BYOC breadth. Many clouds and imported Kubernetes clusters, from the free plan [4] [5]; kosa8's BYOC joins KVM Linux servers [14].
• GPUs and regions. GPU sandboxes and 17 managed regions [1] [3]; kosa8 has no GPUs and two Cloud regions [15] [21].
• Compliance paperwork. SOC 2 Type 2, HIPAA and ISO 27001 stated [12]; kosa8 has no SOC 2 report yet [22].

04Where kosa8 is different

• Memory survives a pause. Northflank's pause ends processes [7]; kosa8 sandbox pause stops CPUs in place and keeps memory [19].
• Live fork and rewind are built in [15].
• Runs on a laptop: Mac, Linux or Windows through WSL2 [14].
• Audit and freeze without Enterprise. A hash-chained log and an organization freeze [18] [20].

05Moving from Northflank to kosa8

Northflank creates a sandbox as a service deployment, waits for it, runs a command and deletes the service [11] [7]. On kosa8 Cloud a sandbox is one call.

Northflank, from its sandbox quickstart (abridged to the calls):

client = ApiClient(api_token=os.environ["NF_API_TOKEN"])
client.create.service.deployment(project_id="your-project-id", data={
    "name": sandbox_id,
    "billing": {"deploymentPlan": "nf-compute-200"},
    "deployment": {"instances": 1, "external": {"imagePath": "ubuntu:22.04"}, ...},
})
client.helpers.wait_for_service_ready(project_id="your-project-id", service_id=sandbox_id, timeout_s=300, poll_interval_s=1)
result = client.exec.run_service_command(project_id="your-project-id", service_id=sandbox_id,
    command="echo 'Hello from sandbox!' && ls /", shell="/bin/bash -c")
client.delete.service(project_id="your-project-id", service_id=sandbox_id)

The same on kosa8 Cloud (Python, pip install kosa8):

from kosa8 import Kosa8Cloud

cloud = Kosa8Cloud()  # reads KOSA8_API_KEY
box = cloud.sandboxes.create(template="python", sleep_after_s=600)
r = box.exec(["python3", "-c", "print('hello')"])
print(r.exit_code, r.stdout)
box.delete()

• No project, plan or readiness wait: sandboxes.create() returns a running sandbox.
• run_service_command(command=..., shell='/bin/bash -c') becomes exec(['bash', '-c', ...]) where the image has bash, or sh on the Alpine templates.
• Pausing maps to box.sleep(), which keeps the disk [15]; locally, kosa8 sandbox pause keeps memory too [19].
• Each kosa8 Cloud exec runs in a fresh container on the sandbox's disk: files under /workspace persist between commands, background processes do not. A buffered exec stops at 90 seconds; send stream: true for longer commands [15].
• Templates today are base (Alpine), python (Python 3.12) and node (Node.js 22) [15].
• An organization runs up to 20 sandboxes at once on kosa8 Cloud unless you ask for more [16].

06Questions

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