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Stacktrace vs Zaelar

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

Stacktrace compared with Zaelar
DetailStacktrace logo StacktraceZaelar logo Zaelar
What it doesReal-time steering and guardrails for AI agents Personal AI agent for schedules, reminders, lists and everyday tasks
StageNot given Not given
FoundedNot given Not given
Based inNot given Not given
Pricing modelFreemium Freemium
PricingTeam: Free per organization, unlimited users, 200 session-hours per month. Enterprise and Gateway: Custom pricing, billed annually. Free: 500 Energy for 30 days, no credit card required, first 1,000 accounts. Spark: $19.99/month with 1,300 Energy monthly. Pulse: $39.99/month with 3,000 Energy monthly. Surge: $79.99/month with 6,500 Energy monthly. Overdrive: $149.99/month with 13,000 Energy monthly. Self-hosted: €0 forever under
Key features
  • Reads every tool call agents make and blocks unsafe ones before they run
  • Catches stalled and runaway sessions while they run
  • Steers agents back when they go past what was asked
  • Tracks every session's tokens against usual usage
  • Stops credential and data leaks before they leave the machine
  • Inventories all agents, MCP servers and skills in use
  • Blocks dangerous calls before they run in agent hooks and at the gateway
  • Sends every finding to Slack, webhook or SIEM
  • Verifies each agent's identity before access
  • Keeps audit-grade masked records of every action and decision
  • Voice and text commands with natural language understanding
  • Calendar scheduling with recurring appointments and exceptions
  • Spoken reminders at scheduled times
  • Multi-task execution in single sentence
  • English and Spanish language support
  • Cross-device sync between phone and computer
  • Approval required for financial transactions
What makes it different
  • Works with Claude Code, Codex, Cursor, Devin and more
  • Runs on your machines, gateways and in the cloud
  • Active steering corrects or stops drifting runs
  • One policy applied across all MCP servers, plugins and skills
  • Continuously monitors components for known vulnerabilities
  • Conversational AI that works like talking to a person, not a search interface
  • Fully isolated private cloud machine for each user with Zaelar Cloud
  • Free self-hosting option with full software access
  • Transparent Energy usage with no surprise billing
Community votes00
DR (Domain Rating by Ahrefs)3 +2 (up) since last check6 +1 (up) since last check
Trust Flow (Majestic)130
Citation Flow (Majestic)2521
Referring domains (Majestic)234

5 details filled in for both companies.

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