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SiftServe vs AI21

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

SiftServe compared with AI21
DetailSiftServe logo SiftServeAI21 logo AI21
What it doesWeb infrastructure that translates your site into an AI-readable version approved by you and served to agents at the edge Post-train specialized models for your task, creating an AI edge your competitors can't buy
StageNot given Established
FoundedNot given Not given
Based inAE IL
Pricing modelFreemium Contact for pricing
PricingFree eight-week pilot including onboarding and model costs. Three paid plans after pilot: Pay as you go (self-serve, usage-based), Subscription (self-serve, monthly or annual flat fee), and Managed (done by company, pricing quoted per site). All plans quoted per individual site based on page count, Not given
Key features
  • AI agent rebuilds pages into semantic HTML, FAQs, and structured data
  • Vision pass captures facts locked inside images
  • Sifted pages use roughly 90% fewer tokens than originals
  • Served from edge, humans and search crawlers see original site unchanged
  • Before-and-after audit score for every page
  • Measures citations and AI referrals from sifted pages
  • Forward-Deployed Researchers provide end-to-end model training and optimization
  • Custom evaluation suite development from real tasks
  • Production-ready deployment with cost-quality trade-offs
  • Deployment flexibility including on-premises and VPC options
  • Data security with no retention and full traceability
  • Continuous model improvement from production traffic
  • Customer ownership of model weights and training recipes
What makes it different
  • Only AI agents see sifted pages; humans and Google crawlers see original site unchanged
  • Every claim traces 1:1 to original pages; AI never fabricates or adds content
  • 90% fewer tokens per page while carrying 37% more readable content
  • Human in the loop approval for every page before serving to agents
  • Measures results with before-and-after comparison on your traffic
  • Customers own specialized models trained on proprietary data, not rented general-purpose models
  • Achieve frontier-level quality at lower costs through specialized training
  • Five years of experience with diverse post-training and optimization methods
  • Models ship production-ready in weeks with ongoing improvement capability
  • Secure deployment with no data retention and auditable access controls
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)22 +1 (up) since last check75 no change since last check
Trust Flow (Majestic)922
Citation Flow (Majestic)2744
Referring domains (Majestic)613529

5 details filled in for both companies.

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