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Seaworthy vs Rystic

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

Seaworthy compared with Rystic
DetailSeaworthy logo SeaworthyRystic logo Rystic
What it doesSecurity checks for AI-built apps before launch Realistic API simulators for training and testing
StageNot given Not given
FoundedNot given Not given
Based inGB US
Pricing modelFreemium Freemium
PricingFree: All checks, terminal and JSON output, exit codes for CI. Pro: £99/year or £12/month, includes HTML reports, scan history, comparison features, priority support, 2 machines. Agency: £349/year, includes white-label reports, scan multiple projects in one report, 10 machines. Free: $0 with GitHub, Linear and Slack simulators, 10 free hours per month. Pro: $89.99 per seat per month with full catalog, $100 usage credit per seat, $0.012 per simulator-minute after credit. Enterprise: custom pricing.
Key features
  • Detects leaked secrets including API keys, passwords, and LLM keys in browser code
  • Checks database and storage security including row-level security policies and open Firestore rules
  • Identifies API route and payment vulnerabilities including missing auth checks and unverified webhooks
  • Detects AI and agent security issues including system prompt injection and unsafe model output rendering
  • Scans dependencies for known vulnerabilities using OSV database
  • Runs entirely locally with code never leaving your machine
  • Works offline and integrates with CI pipelines using environment variables
  • Provides fix suggestions and AI-ready prompts for each finding
  • Supports multiple frameworks including Next.js, React, Vue, Svelte and platforms like Supabase, Firebase, Stripe
  • Generates shareable HTML reports and tracks scan history with Pro plan
  • Slack simulator
  • GitHub simulator
  • Stripe simulator
  • Kalshi simulator
  • Verified against live APIs
  • Latency and fault injection
  • Settable state
  • Local and CI execution
  • Verified UIs
What makes it different
  • Designed specifically for security gaps that AI coding tools create
  • Code never leaves your machine, with zero uploads required
  • Low false alarms through context-aware checking of actual code behavior
  • Free tier includes all core checks with no limitations
  • Source-available license with code readable on GitHub
  • Validated against real APIs daily with published accuracy percentages
  • Stateful simulators that maintain state across calls
  • Local execution with no rate limits
  • Supports 20+ API integrations including Stripe, GitHub and Slack
Community votes00
DR (Domain Rating by Ahrefs)Not checked yet no change since last check2 no change since last check
Trust Flow (Majestic)013
Citation Flow (Majestic)030
Referring domains (Majestic)041

6 details filled in for both companies.

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