Open-Kritt vs Shepherd

Open-Kritt and Shepherd are both agent frameworks tracked by AIDiveForge. Below is a side-by-side comparison of pricing, capabilities, platforms, and ownership — sourced from each tool's live website and verified before publishing.

Open-Kritt

The tool runs parallel AI agents across a codebase, so vulnerability discovery that would serialize into hours on a single-context scan distributes across concurrent analysis threads. It targets security researchers and bug bounty teams who need to sweep repositories at scale, not review a function at a time. Self-hosting is supported under AGPL-3.0, which means your code and findings never leave your infrastructure — a requirement for any org with compliance constraints. The open-source core is inspectable and forkable, but managed scans are a paid-only feature, so teams that want the hosted workflow face a significant spend threshold. The page describes GitHub integration as a first-class path, making it a practical fit for teams already running security workflows inside existing CI infrastructure.

Shepherd

SHEPHERD is a Python substrate from Stanford and Northeastern that turns an agent's execution into a Git-like, reversible trace — so a supervising meta-agent can observe, intercept, fork, and revert any step without rebuilding that capability from scratch each time. The vendor-published benchmark numbers are specific: a supervisor meta-agent lifted pair-coding pass rate from 28.8% to 54.7% on CooperBench; a counterfactual repair meta-agent beat MetaHarness on Terminal-Bench 2.0 by 12.8% while cutting wall-clock time by 58%. The framework is research-grade and open-source, installed via pip. Teams outside the specific use cases the paper targets — runtime intervention, counterfactual optimization, and agentic RL training — will find precious little guidance on how far the substrate stretches.

Attribute	Open-Kritt	Shepherd
Pricing	Paid	Free
Free trial	No	No
Open source	Yes	Yes
Has API	No	No
Self-hosted option	Yes	Yes
Platforms	Local, GitHub, self-hosted	Python
Released	2026-07	2026
Pros	Parallel agent analysis across large codebases, so security researchers are not bottlenecked by single-context limits that cause coverage gaps on repositories too large for one model pass. AGPL-3.0 open-source license with self-hosting support, which means organizations with compliance requirements can audit the tool's behavior and keep all code and findings on their own infrastructure rather than routing through a third-party service. Direct GitHub repository integration, so teams can point the tool at existing repos without building a separate code ingestion or preprocessing step. Support for Codex and Claude Code model backends, so teams can align the analysis engine with the model their organization already has access to or trusts for security-sensitive tasks. Inspectable agent orchestration code under an open license, which means a security team can verify exactly what the agents are executing — a requirement that opaque SaaS tools cannot satisfy.	Git-like reversible execution traces built into the substrate, so a meta-agent can revert a worker to any prior state without custom snapshot logic that teams would otherwise rebuild from scratch on every project. Fork-and-replay from any past checkpoint, which means a counterfactual optimizer can test a corrected decision path without re-running the entire prior sequence — the vendor reports 58% lower wall-clock versus MetaGarness on Terminal-Bench 2.0. Meta-agents and worker agents share the same @task code interface, so the control layer does not require a separate DSL or framework to learn — it is plain Python decorated functions. Open-source with pip install and self-hosting support, so teams running sensitive codebases can keep execution fully on-premise with no data leaving their environment. Intercept hooks let a meta-agent catch a destructive action before it lands, rather than reading about it in a post-mortem transcript — the supervisor use case lifted CooperBench pass rate from 28.8% to 54.7%.
Cons	Managed scans are a paid-only feature with a spend threshold the validator context confirms is substantial; independent researchers and small bug bounty teams operating on limited budgets hit this wall immediately and are forced to self-host, which shifts the burden of infrastructure provisioning, scaling, and maintenance entirely onto the team. Self-hosting the agent infrastructure requires operational capacity that security research teams — typically focused on findings, not DevOps — often lack; teams without a dedicated infrastructure engineer end up spending sprint time on setup and uptime instead of auditing, and those teams frequently abandon self-hosted options for managed security tooling that absorbs that operational cost. No API is available per the tool's current documentation, which means teams that want to embed Kritt.ai's analysis into an existing CI/CD pipeline or trigger scans programmatically from another system face a hard integration ceiling; teams requiring API-driven automation switch to tools with exposed endpoints.	The framework's documented capabilities cover exactly three use cases from the paper; teams that need meta-agent patterns outside runtime intervention, counterfactual optimization, or agentic RL training will find no templates, examples, or community patterns to lean on — they are extending a research prototype. There is no API, which means SHEPHERD cannot be called from a non-Python orchestration layer or integrated into an existing service mesh without a custom wrapper — teams with polyglot architectures hit this wall immediately and typically reach for a framework with a REST interface instead. The Claude CLI dependency in the interactive demo signals the substrate's current depth of LLM provider integration; teams that cannot or will not use Anthropic models during onboarding face an underdocumented offline path before they have validated the tool for their use case. Research-grade codebase with no paid support tier means production incidents land entirely on the team's own debugging of the substrate — organizations that need an SLA or vendor escalation path will abandon SHEPHERD before the first outage.

Bottom line

Open-Kritt is paid while Shepherd is free. Choose based on which difference matters most for your workflow.

Frequently asked questions

What is the difference between Open-Kritt and Shepherd?

Open-Kritt is Paid and open source, while Shepherd is Free and open source. Compare pricing, free trial, API, platforms, and pros/cons in the table above on AIDiveForge.

Is Open-Kritt better than Shepherd?

It depends on your workflow. Use the side-by-side attributes (pricing, open source, API, self-hosted, platforms) to decide. AIDiveForge does not rank a universal winner — we publish verified facts so you can choose.