Sandboxer vs Tencent Cloud SCF (Serverless Cloud Function)

Tencent Cloud SCF runs your code as functions triggered by events such as storage, timers and queues, scaling automatically and billing by resource usage and invocations. Functions are capped at 900 seconds, 3 GB of memory and 512 MB of /tmp. Use SCF for event handlers; use Sandboxer for long-running machines.

Checked against Tencent Cloud SCF (Serverless Cloud Function)'s public docs on October 24, 2026. Sources are linked in the table and listed below.

At a glance

Sandboxer and Tencent Cloud SCF (Serverless Cloud Function) compared
Capability	Sandboxer	Tencent Cloud SCF (Serverless Cloud Function)
Isolation	microVM Cloud Hypervisor, its own kernel	Managed function runtime (technology not stated)
Full Linux with root	Ubuntu 24.04, sudo, systemd	Function runtime; the limits page lists a 512 MB /tmp but does not describe root access.
Docker inside	Preinstalled	Not stated on the pages read.
Nested virtualization (/dev/kvm)
Pause and resume with memory	Running processes come back
Fork a sandbox	Copy-on-write disk copy that boots fresh
HTTPS URL per port	Private with a token, or public
Longest session	No limit on paid plans Auto-stop is up to 30 days or off	900 seconds per invocation Timeout range 1 to 900 seconds.
Billing	Per second, flat rate per size Stopped sandboxes are free	per GB-second plus per invocation $0.0000167 per GB-second, $0.002 per 10,000 invocations; free quotas apply.
GPUs		Not stated on the pages read.
Self-host or open source		Not stated on the pages read.
Regions	US East (Virginia) and EU Central (Finland)	12 regions incl. Singapore, Tokyo, Frankfurt, Ashburn, Silicon Valley

= not documented publicly.

Published prices

Sandboxer

$0.036/hour

Flat per-second rate for the default size

Tencent Cloud SCF (Serverless Cloud Function)

$0.18/hour

SCF memory is capped at 3,072 MB, so no 4 vCPU / 8 GB function exists. At the 3 GB maximum: 3 GB × 3,600 s × $0.0000167 per GB-second = $0.18/h while executing; invocation fees excluded.

List prices from each provider's pricing page, before free credits, plans and storage. This compares price only.

Where Tencent Cloud SCF (Serverless Cloud Function) is strong

Automatic scaling from zero to high concurrency.
Event triggers from storage uploads, timers and queues.
12 regions and a free monthly quota.

Where Sandboxer differs

Functions are limited to 900 s, 3 GB and 512 MB temp disk.
SCF's limits pages describe a function runtime and do not mention root, a Docker daemon or SSH.
Billing is per GB-second and per invocation, not per VM.

Pick Tencent Cloud SCF (Serverless Cloud Function) if

You run short event-driven functions and want pay-per-call pricing.
You want regions in mainland China or Asia from Tencent.

Pick Sandboxer if

You need disposable full VMs you can stop and resume with memory and processes restored, billed per second.
You want every port reachable as an HTTPS URL and a prompt API for preinstalled coding agents.
You need long-running processes and a full machine.

Sources

Products change. If something here is out of date, email hello@sandboxer.com and we'll fix it. Tencent Cloud SCF (Serverless Cloud Function) is a trademark of its owner. Sandboxer is an independent product and is not affiliated with Tencent Cloud SCF (Serverless Cloud Function).

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