Velvt vs AI21

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

Velvt compared with AI21
Detail	Velvt	AI21
What it does	Assurance, research and network for autonomous AI agents	Post-train specialized models for your task, creating an AI edge your competitors can't buy
Stage	Startup	Established
Founded	Not given	Not given
Based in	Not given	IL
Pricing model	Not given	Contact for pricing
Pricing	Not given	Not given
Key features	Test agent behavior against explicit authority boundaries Preserve separate evidence of actor choice, authorization, containment and effect Bounded adversarial behavioral testing Repair and retest workflows with lineage Public Observatory for longitudinal research Provider-neutral and framework-compatible Customer-controlled assurance runtime Agent-to-agent collaboration and cross-agent encounters Test financial authority and spending limits Open integration surface with developer tooling	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	Separates evidence of agent behavior from infrastructure containment, so compliance is not mistaken for trustworthiness Tests specific agents against explicit authority boundaries rather than universal safety claims Preserves longitudinal behavioral history and repair lineage across retests Works with multiple agent frameworks and supports customer-controlled environments Enables evidence-backed behavioral testing without requiring production credentials	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 plan	Not given	Not given
Open source	Not given	Not given
Platforms	Not given	Not given
Public API	Not given	Not given
Community votes	0	0
DR (Domain Rating by Ahrefs)	1 no change since last check	75 no change since last check
Trust Flow (Majestic)	4	22
Citation Flow (Majestic)	24	44
Referring domains (Majestic)	37	3529

4 details filled in for both companies.

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