Veto vs Multifactor
These are different categories. Multifactor is a password manager built for the AI era -- it lets you share online accounts with AI agents securely, with read-only access, instant revocation, and post-quantum encryption. Veto is a runtime authorization SDK -- it controls what tool calls an AI agent can make. They solve different problems at different layers.
Honest assessment
If you're comparing Veto and Multifactor as alternatives, you're likely looking at "AI agent security" as a category and wondering which to pick. The answer is: they don't compete. Multifactor controls which accounts an agent can access and what permission level it has within those accounts. Veto controls which actions an agent takes with its tools, regardless of what accounts it can access. You might need both. You might need only one. It depends on your threat model.
What each product does
Multifactor
A password manager and secure account sharing platform. Founded by a former CIA officer and a former NASA cryptographer. $15M seed round (YC F25). Uses patented post-quantum cryptographic techniques.
Core capability:
Checkpoint -- a proxy that sits between an AI agent and your online accounts. The agent never sees passwords. You can grant read-only access (e.g., "read transactions" but not "make transfers"), and revoke access instantly without resetting passwords.
- Share any online account via a link
- Read-only mode prevents credential exposure
- Instant revocation without password resets
- Audit trail of who accessed what
- Post-quantum encryption for credential storage
Veto
An open-source runtime authorization SDK for AI agents. Intercepts tool calls at the application layer and evaluates them against declarative policies before execution.
Core capability:
Policy engine -- YAML rules that match on tool name, arguments, and context. Actions can be allowed, denied, or routed to human approval. The agent cannot bypass the policy layer because it operates outside the LLM's reasoning.
- Tool-call interception and evaluation
- Human-in-the-loop approval workflows
- Declarative YAML policies in version control
- Framework integrations (LangChain, OpenAI, etc.)
- Open source SDK (Apache-2.0)
Feature comparison
Many of these aren't "one has it, the other doesn't" -- they're in different categories entirely. Included for completeness.
| Capability | Veto | Multifactor |
|---|---|---|
| Tool-call authorization | ||
| Human approval workflows | ||
| Declarative policy language | ||
| Secure account sharing | ||
| Password management | ||
| Read-only account access | ||
| Post-quantum encryption | ||
| Audit trails | ||
| Open-source SDK | ||
| Framework integrations | ||
| Self-hosted option | ||
| MCP gateway support |
The real question: what's your threat model?
Ask two questions. Your answers determine which product (or both) you need.
"How do I safely give my AI agent access to online accounts and third-party services?"
This is Multifactor's question. If your agent needs to log into your bank to check transactions, access your CRM to pull customer data, or browse internal tools on your behalf, Multifactor's Checkpoint proxy gives it access without exposing passwords. You control the permission level and can revoke instantly.
"How do I control what my AI agent does once it has access?"
This is Veto's question. Once the agent can access your systems (however it got credentials), what tool calls should be allowed? Should it be able to delete records? Approve transactions above a threshold? Access PII without logging? Veto evaluates each tool call against policies and routes sensitive actions to human review.
Both questions? Use both products.
Multifactor gives the agent safe account access. Veto controls what it does with that access. They operate at different layers and don't overlap.
Pricing
Open source SDK is free (Apache-2.0). Managed cloud starts free with usage-based tiers. Self-host for $0 if you prefer.
Free for individuals and small groups. Enterprise plans with advanced features and dedicated support available. $15M in seed funding from Nexus Venture Partners and YC.
Decision framework
Choose Veto when
- You build AI agents that make tool calls
- You need to control what actions agents take
- You require human approval for sensitive operations
- You need audit trails of every agent decision
- You want policies in version control
- Agents already have API access; you need action-level control
Choose Multifactor when
- You need to share online accounts with AI agents safely
- Agents need to log into websites on your behalf
- You want read-only access without exposing passwords
- You need instant revocation of agent access
- You also need human-to-human account sharing
- Post-quantum encryption is a requirement
Frequently asked questions
Are these really different categories?
Which is better for autonomous AI agents?
Can I use Multifactor for account access and Veto for action control?
Is Veto open source?
Related comparisons
Control what your agents do, not just what they can access.