Sandbox0 vs Knotr

A side-by-side comparison built from both listings. Blank cells mean the company has not given that detail; we never guess.

Sandbox0 compared with Knotr
Detail	Sandbox0	Knotr
What it does	Cloud agent sandbox with persistent filesystem and on-demand compute	Your voice and skills in every AI tool you use
Stage	MVP	Startup
Founded	Not given	Not given
Based in	US	US
Pricing model	Paid	Freemium
Pricing	Compute: $0.015 per GiB-hour (approximately $0.000004167 per GiB-second, billed by the second). Storage: $0.02 per GiB-month for retained incremental RootFS data and memory checkpoints. Network ingress and egress currently free. Object-store GET and PUT requests free. New users receive $5 free credi	Free: 1 Profile, 10 Skills, 50 Documents, 10 Artifacts, 1 Style Guide from Starter Pack, 100 Hosted Chat AI credits/month. Pro: $24/mo or $20/mo billed annually, 5 Profiles, 75 Skills, 500 Documents, 75 Artifacts, 1 Style Guide, 1,000 Hosted Chat AI credits/month. Max: $49/mo or $40/mo billed annual
Key features	Automatic filesystem growth as storage fills Pause compute without losing work or paying compute charges Resume to same environment on demand Access files while paused without waking compute Public HTTP services with auto-resume capability Command-line interface (s0 CLI) for agent-native workflows Incremental checkpoints to avoid full filesystem copies Scoped API keys and team-based access controls On-demand file reads without downloading entire filesystem	Profiles to define voice, tone, and judgment Style Guides to enforce writing rules Knowledgebases to store trusted documents and notes Skills to package repeatable workflows Artifacts for versioned, shareable outputs Hosted Chat with custom runtime MCP integration with external tools Team workspaces with shared knowledge Skill Catalog for discovery and import Collections to group and present artifacts
What makes it different	Persistent filesystem across pause/resume without duplicating data Pay only for compute time used; paused sandboxes have zero compute charges Automatic filesystem growth so agents can install and persist unlimited tools Same API for both human users and AI agents	Output sounds like you, not generic AI, because every tool reads the same profiles and style guides Stop re-uploading docs and rewriting instructions for each new tool Individual voice, shared standards on teams Built-in changelogs instead of Git for managing skills Works with any MCP-compatible AI client without vendor lock-in
Free plan	Not given	Not given
Open source	Not given	Not given
Platforms	Not given	Not given
Public API	Not given	Not given
Community votes	0	0
DR (Domain Rating by Ahrefs)	16 +1 (up) since last check	2 no change since last check
Trust Flow (Majestic)	5	4
Citation Flow (Majestic)	21	25
Referring domains (Majestic)	17	27

7 details filled in for both companies.

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