# Shardflux

Official pricing: https://shardflux.dev/#pricing  
Category: agent-sandbox · Isolation: firecracker

## Pricing regimes (raw)

- **Workspace** (resource): $0.04/vCPU-h, $0.015/GiB-h
- **File-first workspace (fresh VM per command)** (resource): $0.04/vCPU-h, $0.015/GiB-h [alt]

## Features

Yes: snapshots, memory snapshots, fork/clone, pause/resume, persistent disk, whole disk survives a stop, volumes, idle auto-stop, ≥24 h sessions, custom image (Docker or snapshot), start from your own snapshot, your own Docker/OCI image, full VM (own kernel), root, browser, desktop GUI, computer-use API, browser automation API, desktop control API, browser + desktop control, preinstalled agents, HTTPS preview URLs, egress allowlist, open internet, GPU, Python, Node.js, credential injection, wake on request, live resize, live fork (no pause), memory fork, audit logs, spend limits, MCP server, usage per sandbox (API), automatic snapshots, snapshots on demand, agent harness API, gVisor or VM (no shared kernel), inbound access rules, firewall inside (nftables), extra volumes, shared volumes, FUSE mounts, kernel features (eBPF, mounts, cgroups)

No: nested virtualization, anti-bot stealth, CAPTCHA solving, residential IPs, SSH, public IPv4, static egress IP, self-hosting, BYOC, open source, arm64, Windows, macOS, HTTP method/path egress rules, EU data residency, hosted agent API (their own agent), secret proxy, secret proxy for any API

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

## Company

- Ownership: independent
- Stage: unknown
- Accelerators: none found
- Total raised: unknown
- Revenue: unknown

Shardflux (shardflux.dev) is legally operated by Helios One Oy, a Finnish software company (business ID 3596623-5, registered 2026-02-09, Espoo). Helios One Oy's public-facing site (heliosone.fi) describes its main product as 'Helios'/FactoryOS, an ERP agent for contract manufacturers, built by a 4-person team (Victor Ocampo, Samu Ahonen, Touko Ursin, Marc Smeds); Shardflux appears to be a second, separate product line from the same small company/team (Shardflux's npm package is maintained by Marc Smeds via a heliosone.fi email). Shardflux itself is brand-new: its GitHub org was created 2026-09-26 and its own site currently reads 'Now live' with only a free/self-serve plan advertised. No accelerator, funding round, investor, or revenue figures were found for Shardflux or for Helios One Oy in web search, HN, Y Combinator's company directory, GitHub, or npm; treat funding/stage/revenue as unknown pending a primary source.

## Caveats

- Plans include CPU-hours and RAM GiB-hours, not dollars. They are valued at the published overage rates ($0.04/CPU-hour, $0.015/GiB-hour) so the engine can net them against usage; in reality the two allowances do not offset each other, so a workload that uses up only one of them can cost somewhat more than shown. Startup and Scale GPU-hours (25 / 100) are not valued.
- Overage is off until you turn it on, with a spend cap you set (docs.shardflux.dev/limits, 2026-10-14).
- Retained storage (suspended workspaces, shared volumes) is never charged; outgoing transfer has no overage price and is blocked when the plan allowance runs out, so egress beyond the allowance is priced as unknown.
- Every workspace is its own microVM with its own kernel; the hypervisor is not named. Suspend checkpoints memory and processes; resume p50 0.3 s, new workspace p50 0.2 s (vendor claims on the landing page).
- Templates (e.g. python-node-browser) are the base images; a template can be built from a Dockerfile (recipe v1). Docker inside and SSH are not documented; root via sudo in the ubuntu-24.04 base.
- Workspaces run in AWS us-west-2 only; no data residency outside the United States. Start waits up to 15 minutes for capacity before failing with capacity_unavailable.
- Features set to null were not verified. No workspace was purchased or tested; feature/performance statements are documentation claims.
- Opt-in overage is capped at most at the plan price ($9/$29/$79/$299), so a month's bill is at most 2x the plan fee; beyond that, starts are refused and running workspaces are suspended (402 allowance_exhausted, details.reason spend_cap_reached). Scale with full overage covers 67,933 RAM GiB-hours a month; beyond that only Enterprise fits.
- Idle-but-running workspaces are parked: 'it then uses at most 256 MiB plus the compressed size of the rest, until the next call wakes it' (docs.shardflux.dev/limits); the homepage says a parked workspace 'counts 256 MiB for about 15 seconds, then nothing'. RAM is billed as used while it works: elastic memory (the default) counts 'what its processes use and at least its 1 GiB floor', a fixed workspace its full allocation (the homepage shorthand 'count a workspace’s full size while it works' is less precise; the limits page is followed); ram_basis is active on that basis. The engine bills RAM at utilisation for the whole session and does not model parked time between tool calls or the 1 GiB floor, so idle-heavy agent sessions are overstated. The adaptive idle timeout is 5 min until learned (10 s to 4 h), or it can be set to fixed:60-604800 s or never.
- Rate limits: 3,600 tool tokens per hour per API key (an open that returns a token counts; 429 rate_limited beyond), 3 concurrent template builds per org.
- GPU on Startup and Scale is for rendering through Shardflux's own Vulkan driver, metered in GPU-hours (the larger of the scene's GPU memory over 16 GiB and the GPU busy share), 25 / 100 included, $1.00 per GPU-hour overage. The engine has no rendering-GPU meter, so GPU workloads are not priced.
- Signup trial: 30 days of Pro with no card (500 CPU-hours, 4,000 RAM GiB-hours, hard caps), one per person, while each month's trials last; then the organization drops to Free with nothing deleted.
- Agent accounts: several Claude and ChatGPT/Codex sign-ins per organization with their usage windows, one active per provider; `shard agents accounts use claude:2` switches it, and running conversations follow (docs.shardflux.dev/concepts/accounts, 2026-10-14). No feature key expresses account switching yet.