Kastra vs NitroStack: Features, Pricing & Which Is Better (2026)

A side-by-side comparison of Kastra and NitroStack — features, pricing, and ideal use cases — to help you decide which AI tool fits your workflow.

Kastra

Kastra Labs Inc

Freemium

Kastra is the runtime authorization layer for AI: it decides in sub-milliseconds what agents, models, and tools are allowed to do before they act.

Sub-Millisecond Policy Decisions: Every prompt, tool call, and API request is evaluated in under a millisecond so enforcement never becomes the bottleneck.
Deterministic Policy Engine: Rules are written and evaluated deterministically, not by an LLM judge, so the same input always produces the same allow/deny.
Kastra Edge (Local Enforcement): A local enforcement component that runs next to the agent so decisions happen even without a network round-trip.
Cryptographic Audit Trails: Signed logs of every decision give security and compliance teams tamper-evident evidence of agent behavior.
Coding Agent Integrations: First-class hooks for Claude Code, Cursor, Codex, and OpenClaw let policies wrap the tool calls those agents already make.
Kastra Recon: Discovers what actions an agent actually attempts in a codebase or environment, so policies can be authored from observed behavior instead of guesses.
Zero Implicit Trust Model: Nothing an agent asks to do runs until it is explicitly allowed by policy, aligning agent access with zero-trust principles.

Guardrails for Coding Agents: Prevent an autonomous coding agent from dropping tables, force-pushing to main, or leaking secrets during long runs.
Enterprise Rollout Approvals: Give security teams a control plane before letting employee-facing AI agents access internal APIs.
Regulated-Industry Agent Deployments: Provide the auditable authorization trail required in finance, healthcare, or government agent pilots.
Multi-Agent Systems: Enforce per-agent scopes so a research agent can read data but only a deploy agent can trigger production changes.
Incident Forensics: Reconstruct exactly what an AI agent was allowed or blocked from doing after a suspicious action.

Freemium

Full-stack MCP platform to build, test and deploy production MCP servers and apps, with a TypeScript SDK, desktop IDE and serverless hosting.

NitroStack SDK: TypeScript-first, type-safe framework for MCP servers with declarative decorators, Zod validation and built-in enterprise auth.
NitroStudio IDE: Desktop IDE for MCP development with a visual tool inspector, AI chat, Ops Canvas and voice mode.
NitroCloud Hosting: Serverless MCP hosting that deploys from GitHub with sub-2-second boot, scale-to-zero, auto-scaling and automatic SSL.
NitroChat: White-label, multi-provider AI chat client for MCP servers with full branding control.
API to MCP Conversion: Turns existing APIs into MCP servers and visualizes AI reasoning during testing.
Enterprise Security: AES-256, JWT auth, RBAC, audit logs and custom SLAs on higher tiers.

Production MCP Servers: Build and ship MCP servers with typed tools, resources and prompts.
Wrapping Existing APIs: Expose internal REST APIs to AI agents as MCP servers.
Debugging MCP Tools: Inspect and test tool calls visually before release.
Serverless Agent Backends: Host MCP workloads that scale to zero during idle periods.
White-label Agent Chat: Ship a branded chat front end for customers on top of your MCP servers.