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About

Agent Substrate is an open-source runtime for operating isolated, stateful agent and code-execution sandboxes on Kubernetes. It coordinates actor and worker lifecycles, places active workloads on a shared pool of ready capacity, and can suspend idle environments while preserving memory and filesystem state for later resumption. Sandboxes use gVisor or Cloud Hypervisor microVM isolation, with per-actor identity and network controls. Agent Substrate is designed for platform and infrastructure teams building agent-hosting services, coding environments, and other workloads that execute untrusted or intermittent tasks. The core project is Kubernetes-portable; Google Cloud also provides GKE-optimized deployment tooling. Optional Filestore agent volumes can persist workspaces across suspend and resume cycles.

About

SEAOTTER is a managed control plane for Hermes Agent on Google Cloud. Isolated, always-on agents. No VPS. No SSH. You create an agent in the dashboard. SEAOTTER provisions a per-agent namespace with a gVisor sandbox, typically in a few minutes. Pause, restart, restore, and reprovision from the API or UI. Logs and metrics included. You do not SSH into a box. Secrets go in a write-only tab and are stored in Google Secret Manager. Hermes loads them at startup. Do not paste keys into chat. After signup, connect with an org-scoped so_ MCP key from Cursor, Claude, or Codex. Hermes is the live harness: tools, memory, cron. us-central1 is live. 7-day trial, no credit card, one agent only (1 CPU / 4Gi / 8Gi). Then $99 per always-on agent / month. Extra agents after convert at +$99. Custom is book-a-call.

Platforms Supported

Windows Not Supported
Mac Not Supported
Linux Supported
Cloud Not Supported
On-Premises Supported
iPhone Not Supported
iPad Not Supported
Android Not Supported
Chromebook Not Supported

Platforms Supported

Windows Not Supported
Mac Not Supported
Linux Not Supported
Cloud Supported
On-Premises Not Supported
iPhone Not Supported
iPad Not Supported
Android Not Supported
Chromebook Not Supported

Audience

Platform and infrastructure teams building services that run isolated agent or code-execution workloads on Kubernetes.

Audience

Builders, operators, and small teams who want always-on Hermes Agent without running a VPS. Builders: people who already use Hermes (or want to) and need one standing agent for tools, memory, and cron. They close the laptop and the agent stays up. No ops hire. Operators: people who would otherwise SSH into a box to pause, restart, restore, or rotate keys. They want lifecycle from a dashboard and API, secrets in Google Secret Manager, and MCP from Cursor, Claude, or Codex. Teams: groups that outgrew a single laptop or a cheap VPS and want the same managed plane for more than one isolated agent after they convert from trial. Isolation is per agent from day one; it does not wait for an Enterprise SKU. Not the audience: agencies as a landing ICP, generic “host any agent” shoppers, or anyone looking for OtterScore / seaotter.ai. Custom / larger orgs can book a call. Industries are not locked. Fit is the job: keep open-source Hermes online without owning Linux, Docker, or SSH.

Support

Phone Support Not Supported
24/7 Live Support Not Supported
Online Not Supported

Support

Phone Support Not Supported
24/7 Live Support Not Supported
Online Supported

API

Offers API Supported

API

Offers API Not Supported

Screenshots and Videos

Screenshots and Videos

No images available

Pricing

$0
Agent Substrate on GKE is offered at no extra charge. GKE pricing applies to the resources you create.
Free Version Supported
Free Trial Not Supported

Pricing

$99
Free Version Not Supported
Free Trial Supported

Reviews/Ratings

Overall 0.0 / 5
ease 0.0 / 5
features 0.0 / 5
design 0.0 / 5
support 0.0 / 5

This software hasn't been reviewed yet. Be the first to provide a review:

Review this Software

Reviews/Ratings

Overall 0.0 / 5
ease 0.0 / 5
features 0.0 / 5
design 0.0 / 5
support 0.0 / 5

This software hasn't been reviewed yet. Be the first to provide a review:

Review this Software

Training

Documentation Supported
Webinars Not Supported
Live Online Not Supported
In Person Not Supported

Training

Documentation Supported
Webinars Not Supported
Live Online Not Supported
In Person Not Supported

Company Information

Google
Founded: 1998
United States
github.com/agent-substrate/substrate

Company Information

SEAOTTER
Founded: 2026
United States
seaotter.dev/

Alternatives

Alternatives

Sprites

Sprites

Fly.io
MaxHermes

MaxHermes

MiniMax

Categories

Categories

Agentic AI Supported
AI Control Planes Supported

Integrations

Google Cloud Filestore Supported
Google Cloud Platform Supported
Hermes Agent Not Supported
Model Context Protocol (MCP) Supported

Integrations

Google Cloud Filestore Not Supported
Google Cloud Platform Not Supported
Hermes Agent Supported
Model Context Protocol (MCP) Not Supported
Claim Agent Substrate and update features and information
Claim Agent Substrate and update features and information
Claim SEAOTTER and update features and information
Claim SEAOTTER and update features and information