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Steel vs Posthook

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

Steel compared with Posthook
DetailSteelPosthook
What it doesBrowser Infrastructure for AI Agents Webhook scheduler for reminders, follow-ups, and expirations
StageGrowing Established
FoundedNot given 2018
Based inNot given Not given
Pricing modelfreemium freemium
PricingNot given Free plan at 1,000 hooks/month. Paid plans from $39/month (20,000 hooks) to $249/month (500,000 hooks). Only scheduling counts toward quota; retries and deliveries are included.
Key features
  • Session API for on-demand cloud browser sessions
  • Auto CAPTCHA solving
  • Proxy and browser fingerprinting controls
  • Sub-second session startup time
  • Up to 24-hour session duration
  • Cookie and storage management
  • Compatible with Puppeteer, Playwright, and Selenium
  • Session Viewer for debugging
  • Auto sign-in for auth-walled websites
Not given
What makes it different
  • Open-source self-hosted option available on GitHub
  • Works with existing tools via standard CDP WebSocket
  • Fastest session startup time in industry
  • Built-in anti-bot and CAPTCHA handling
  • One-line integration with Puppeteer
  • One API call for all scheduling instead of multiple pollers and failure modes
  • Per-event timing precision instead of polling cadence drift
  • Automatic per-endpoint anomaly detection instead of static thresholds
  • Complete delivery observability and recovery without log reconstruction
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)54 no change since last check20 no change since last check
Trust Flow (Majestic)2818
Citation Flow (Majestic)3331
Referring domains (Majestic)652330

4 details filled in for both companies.

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