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Seedfast vs Altseat

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

Seedfast compared with Altseat
Detail SeedfastAltseat logo Altseat
What it doesSynthetic test data generator for PostgreSQL that reads your live schema and generates realistic data without production data Run multiple Claude Code, Codex and Kimi Code accounts on one Mac with automatic usage tracking and handoff
StageStartup Not given
Founded2025 Not given
Based inSK Not given
Pricing modelFreemium Freemium
PricingFree plan: $5 of monthly credits ($10 with work email), around 8 seeding runs per month on a 30-table schema. Basic plan: $16/month with $32 of monthly credits (2x payment), around 50 runs per month. Premium plan: $69/month with $180 of monthly credits (2.6x payment), around 300 runs per month, prio Free for up to 2 accounts total across all three tools. Lifetime license USD 12 one-time (launch price through 30 November 2026, then USD 19), allowing up to 10 accounts per tool on one Mac. One payment, no subscription.
Key features
  • Reads live database schema to generate coherent test data automatically
  • Generates realistic data at scale from hundreds to tens of millions of rows
  • Maintains foreign key integrity and constraint satisfaction
  • Generates localized data with culturally appropriate names and formats
  • Works as CLI, MCP server for AI editors, and CI/CD pipeline step
  • Handles complex schemas with composite keys and multi-level dependencies
  • Plan preview shows exactly what will be seeded before writing any rows
  • Never requires access to production databases
  • Generates data with realistic distributions across columns and tables
  • Most runs complete in under three minutes
  • Menu bar usage display for Claude Code and Codex accounts
  • Automatic account switching when limits reached
  • Automatic handoff for Claude Code sessions
  • Shared settings and sessions across accounts
  • MCP server synchronization across Claude accounts
  • Support for up to 10 accounts per tool
  • Signed and notarized by Apple
  • In-app updates from the menu bar
  • 14-day refund guarantee
What makes it different
  • No production data exposure: generates all test data from schema alone, eliminating privacy and compliance risks
  • Schema-aware generation creates coherent, relational data without manual seed scripts
  • Integrated with AI editors through MCP server for seamless developer workflow
  • Realistic data that surfaces real bugs, not random placeholder values
  • Works at any scale with consistent data integrity from dozens to tens of millions of rows
  • Automatic handoff continues conversations seamlessly between accounts without interruption
  • Never handles passwords or refreshes tokens, keeping credentials secure
  • Only switches between processes, never changes login of running session
  • Real-time usage visibility for multiple Claude Code and Codex accounts in one place
  • One-time lifetime license with no subscription required
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)8 −19 (down) since last checkNot checked yet no change since last check
Trust Flow (Majestic)270
Citation Flow (Majestic)324
Referring domains (Majestic)621

5 details filled in for both companies.

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