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ActSeal vs Shark Magic

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

ActSeal compared with Shark Magic
Detail ActSeal Shark Magic
What it doesEd25519-signed receipts for agent actions Serverless sandboxes that bill only for the seconds your agent's code runs
StageNot given MVP
FoundedNot given Not given
Based inNot given MX
Pricing modelNot given Freemium
PricingFree: 100 receipts per UTC day. Starter: $19/month via USDC, USDT, or ETH for 500 receipts per UTC day. Shark Pro $5/month includes $5 of usage; Shark Studio $25/month includes $25; Shark Scale $100/month includes $100. Commands run at $0.12 per compute-hour, billed per second only while running. Services: 2 vCPU / 2 GiB at $0.03/h; 4 vCPU / 4 GiB at $0.06/h. Storage $0.08/GiB-month with first 5 GiB f
Key features
  • Issue signed receipts over action hashes
  • Public verification without authentication
  • Payment via USDC, USDT, or ETH
  • Idempotency-Key support for 24 hours
  • stdio MCP integration
  • Issue and consume one-shot receipts
  • Persistent Space for agent files and databases
  • Pay only for compute time while command runs, not idle or thinking time
  • HTTP API with Python and TypeScript SDKs
  • CLI for devbox with Claude Code and Codex support
  • Sleeping services that wake in milliseconds
  • Fork Spaces fast without booting VM
  • API key isolation outside VM with egress proxy
  • Fast file search with sharkfn 300–600× faster than ripgrep
  • Integration with LangChain, LangGraph, smolagents, and Prefect
What makes it different
  • Portable cryptographic signatures verifiable by anyone without trusting the agent or service
  • Built specifically for agent stacks and MCP/OpenAPI agents
  • Cross-agent trust without sharing private keys
  • Billing only for seconds code actually runs, not idle or thinking time
  • Lowest cost compared to alternatives for agent infrastructure
  • Persistent Storage with fast Space fork and file access without VM boot
  • No GPU required, works with unmodified existing agent harnesses
  • Sleeping services wake in milliseconds with zero idle billing
Free planNot given Not given
Open sourceNot given Not given
PlatformsNot given Not given
Public APINot given Not given
Community votes00
DR (Domain Rating by Ahrefs)1 no change since last checkNot checked yet no change since last check
Trust Flow (Majestic)20
Citation Flow (Majestic)160
Referring domains (Majestic)30

4 details filled in for both companies.

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