Gateplex vs Trajeckt

Gateplex and Trajeckt are both guardrails & safety 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.

Gateplex

Gateplex is governance middleware: it does not run your agents, it watches them. The vendor describes it as a policy enforcement layer that intercepts agent actions — API calls, approvals, data sends — checks them against defined rules, and blocks or flags violations before execution completes. That distinction matters for regulated environments where post-hoc logging is not enough. The free tier covers three agents and a capped intercept volume per month, which fits a proof-of-concept but runs short the moment a second team deploys. Beyond that ceiling, teams move to a paid tier or hit a wall.

Trajeckt

The tool sits as a runtime gateway between your agent and its tools, evaluating the sequence of calls rather than any individual call in isolation. The vendor states enforcement runs deterministically in approximately 1.6ms, outside the model itself, so policy decisions cannot be overridden by prompt injection. It is open-source under Apache-2.0 and self-hostable via Docker or Cargo. Where it fits well is MCP-compatible setups that need sequence-level rules without building a custom policy engine. Where it breaks is anywhere you need probabilistic or context-aware rules — this is deterministic enforcement, and the constraints you do not define ahead of time do not get caught.

Attribute	Gateplex	Trajeckt
Pricing	Paid	Free
Price	$199/month	—
Free trial	No	No
Open source	No	Yes
Has API	Yes	Yes
Self-hosted option	No	Yes
Platforms	Cloud-based middleware; integrates with agent frameworks on any platform running OpenAI, Anthropic, LangChain, CrewAI, AutoGen, Vertex AI, or AWS Bedrock	Rust, Docker
Pros	Real-time action interception before execution completes, which means a procurement agent cannot approve an out-of-policy spend and then get flagged about it afterward — the action is stopped in the moment. PII detection at the intercept layer, so customer data does not reach a third-party API before a policy check has cleared it — without this, a misconfigured agent integration becomes a data leak that logging discovers too late. Duplicate transaction detection for financial agents, which prevents a refund or payment from issuing twice due to a retry loop or race condition — the kind of error that is trivial to miss and expensive to reverse. Audit trail output formatted for legal and compliance review rather than raw telemetry, so the evidence package a regulator or procurement committee requests does not require a data engineering sprint to produce. API access to the enforcement layer, which means policy rules can be managed programmatically and integrated into existing deployment pipelines rather than configured only through a UI.	Trajectory-aware blocking catches multi-step exfiltration chains where every individual call looks clean, so attacks that evade per-action filters get stopped before data leaves the environment. Deterministic enforcement at approximately 1.6ms per decision, per the vendor, so adding this layer to an agent's tool-call path does not introduce meaningful latency at typical request volumes. Runs outside the model and is not reachable by prompt injection, which means a compromised prompt cannot talk the policy engine into allowing a blocked sequence. Apache-2.0 license with self-hosted Docker and Cargo deployment paths, so your traffic and trajectory data stay inside your own infrastructure without a vendor dependency. Python SDK included alongside the core gateway, which means integrating trajeckt into an existing Python-based agent stack does not require wrapping a foreign-language binary by hand.
Cons	No self-hosted deployment option is documented — every agent action routed through Gateplex passes through vendor infrastructure. Teams with data residency requirements, air-gapped environments, or legal restrictions on externalizing sensitive financial or health data have no workaround: this is a hard architectural incompatibility, not a configuration problem, and those teams evaluate on-premises alternatives instead. The free tier caps at three agents and a fixed intercept volume per month. A team piloting with two agents clears that ceiling the moment a third team onboards or production traffic spikes — at which point the choice is a paid tier commitment or a freeze on agent expansion, and the evaluation timeline compresses. Gateplex enforces policy on agent actions but does not itself define what your agents should do — teams that want policy logic tightly coupled to agent orchestration (branching based on what a prior step returned, approval gates wired into the agent graph) end up maintaining Gateplex as a separate enforcement layer alongside their orchestration framework, which is two systems to debug when something breaks.	Policy coverage is limited to sequences you define in advance: if an attacker constructs an exfiltration chain you did not model in the config, no rule fires and the traffic passes. Teams with a broad or evolving threat surface end up writing and maintaining a growing config corpus, at which point the 'lightweight' framing stops holding. The deterministic rule engine has no probabilistic or semantic layer — it cannot flag 'this trajectory looks unusual even if no explicit rule matches.' Teams that need anomaly detection on top of hard rules typically add a separate monitoring layer, which means maintaining two systems. At the point where your agent's allowed call graph is genuinely complex — branching on prior results, conditional paths, dynamic tool registration — encoding that graph as causal constraints becomes its own engineering problem. Teams with agents at that complexity level often move to a full policy engine that supports programmatic rule generation rather than static config files.

Bottom line

Gateplex is paid while Trajeckt is free; Trajeckt is open source. Choose based on which difference matters most for your workflow.

Frequently asked questions

What is the difference between Gateplex and Trajeckt?

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

Is Gateplex better than Trajeckt?

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.