# SF Tensor

Official pricing: https://sf-tensor.com  
Category: gpu-cloud · Isolation: gvisor

## Pricing regimes (raw)

- **Native product; see regime notes** (resource) [alt, sales]

## Features

Yes: persistent disk, volumes, ≥24 h sessions, custom image (Docker or snapshot), your own Docker/OCI image, BYOC, GPU, Python, gVisor or VM (no shared kernel), shared volumes

No: snapshots, memory snapshots, fork/clone, pause/resume, idle auto-stop, start from your own snapshot, full VM (own kernel), nested virtualization, browser, desktop GUI, computer-use API, browser + desktop control, anti-bot stealth, CAPTCHA solving, residential IPs, preinstalled agents, SSH, public IPv4, HTTPS preview URLs, egress allowlist, static egress IP, self-hosting, open source, Windows, macOS, Node.js, HTTP method/path egress rules, wake on request, live resize, live fork (no pause), memory fork, EU data residency, MCP server, automatic snapshots, snapshots on demand, agent harness API, hosted agent API (their own agent), inbound access rules, firewall inside (nftables), secret proxy, secret proxy for any API, extra volumes

Unknown: everything else. Evidence (source + quote) per feature: https://battleships.dev/data/providers/sf-tensor.json → feature_evidence

## Caveats

- Live site sells Model Foundry (managed training, savings-share) and the Kernel Optimizer; the 2025 'Tensor Cloud' private beta is no longer in the navigation. /pricing and /legal/prices are 404. Published tariff = Terms s.3.3: underlying cloud cost pass-through + 10/8/6% of savings vs AWS/GCP/Azure us-east on-demand average. No fixed GPU/CPU/RAM rates; archived (Wayback, not live) price list showed 'Tensor Cloud $0.01 per GPU-hour' (v1.0, Nov 5 2025).
- Null values mean unknown, not free/unlimited. No model-token cost, tax or unverified ancillary charge included.
- Native browser/device/task/credit prices with unknown CPU/RAM are deliberately non-priceable. Check regime before interpreting any partial resource estimate.

## How this provider charges


YC: Fall 2025; directory status **Active**. Research scope: public-product-researched. Source: https://www.ycombinator.com/companies/sf-tensor

Elastic training cloud

## Regime table

| Regime | When it applies | How billed | Numbers | Source |
|---|---|---|---|---|
| Native product; see regime notes | Incomplete or non-resource economics: rates remain null, never interpreted as free. | resource; CPU alloc, memory alloc | Unknown or native-unit billing; see facts below | https://sf-tensor.com |
| Current applicable tariff unverified | Plan limits apply | Monthly fee; credits only as stated | fee=None; included usage=$None; concurrent=None; max session h=None | https://sf-tensor.com |
| Retained disk / GiB-month | Lifecycle/scope must be checked | Native add-on | unverified, not $0 | https://sf-tensor.com |
| Snapshots / GiB-month | Lifecycle/scope must be checked | Native add-on | unverified, not $0 | https://sf-tensor.com |
| Egress / GiB | Lifecycle/scope must be checked | Native add-on | unverified, not $0 | https://sf-tensor.com |
| IPv4 / month | Lifecycle/scope must be checked | Native add-on | unverified, not $0 | https://sf-tensor.com |

## Verified billing facts and gotchas

1. YC describes cheapest-provider routing with spot-preemption management plus kernel optimization. Current site talks training runs; pricing 404. No list rates or explicit CPU/RAM configurations verified.

## Worked example

Requested: 4 vCPU/8 GiB, 50 simultaneous × 8 h/day × 22 days = **8,800 instance-hours**, 30% CPU; 50 GiB snapshots and 100 GiB egress. A month is 730 hours only when explicitly used in rate conversion.

**Total: unknown.** This product does not publish a verified complete 4-vCPU/8-GiB tariff and/or the service bills a different unit. Fifty concurrent instances and eight-hour sessions are not automatically supported. Neither 30% utilization nor retained snapshots can be converted into free resources. Use the native plan terms above and request the missing CPU/RAM, retention, egress and concurrency quote.

## Sources and coverage

- https://www.ycombinator.com/companies/sf-tensor
- https://sf-tensor.com/

Page captures and documentation indexes/bundles are in `raw/`; provider JSON lists the evidence paths. HN query results were captured separately as `<id>--hn.txt`; they are discovery leads, not current tariff authority. Downloaded docs do not imply every feature was verified; unsupported assertions remain null.