Which Lasso Security alternative covers the broadest scope?

Breadth depends on the deployed routes. Noma and Harmonic both describe several agent and usage surfaces. Prompt Security emphasizes browser and endpoint visibility. agentgateway covers traffic sent through its data plane. DeepInspect covers authenticated HTTP LLM routes. Require a route-by-route demonstration instead of awarding a generic breadth score.

Can a browser sensor replace an LLM gateway?

A browser sensor can observe employee activity that a backend gateway never receives. A gateway can govern server-side application and agent calls that have no browser in the path. An enterprise using both routes may need both controls, with one event model that keeps their evidence distinct.

Is agentgateway a complete replacement for Lasso?

agentgateway can provide an open-source data plane for agent protocols and MCP connectivity. Lasso also describes discovery and assessment. It covers red teaming and browser or endpoint usage control, plus threat response. A team replacing the wider platform should assign those remaining functions to named controls.

Which alternative produces evidence for an authenticated LLM request?

The product must receive application-supplied identity on the actual request path and preserve the policy decision independently. Ask every vendor to retrieve a test event by transaction ID and show identity and route; policy version and classification; and outcome and timestamp.

Lasso Security Alternatives by Enforcement Boundary

Lasso Security alternatives make sense only after the buyer marks the traffic boundary on an architecture diagram. Lasso spans AI usage control and application security, plus MCP security. That reaches browser and endpoint activity. It also reaches application runtime paths and MCP connections. Noma and Harmonic cover distinct surfaces. Prompt Security covers another distinct surface, as do agentgateway and DeepInspect. Replacing Lasso with one name can leave an entire route unowned.

TL;DR

Noma Security fits buyers who want agent discovery and identity, plus runtime controls and policy enforcement through existing AI infrastructure.
Harmonic and Prompt Security focus on employee and agent activity visible through browser or endpoint sensors, including local tools that an HTTP gateway may never see.
agentgateway is an open-source gateway for agent and MCP traffic, with the operating burden left to the team running it.
DeepInspect fits authenticated HTTP requests deliberately routed to LLM endpoints, where identity-bound policy and independent decision evidence drive the purchase.

Lasso Security alternatives start with its three surfaces

Lasso's AI Security Platform describes discovery and risk assessment. It also covers red teaming and runtime protection, along with response. Its AI usage control page adds browser chatbots and desktop agents, with monitoring by user and department. The application-security page covers inventory and model risk. It also covers automated testing and runtime controls, along with threat response. Its MCP material adds connection-layer inspection for tools and servers.

The brief spans several control surfaces. A shortlist should therefore name each route before comparing products. Draw one line from an employee browser to a public chatbot. The second line runs from a local coding agent to its model and tools. A third connects a backend application to an LLM API, with MCP client-to-server calls added separately. Put an owner beside every arrow.

I would reject any scorecard with one row called "runtime security." The label hides which process receives the traffic and which control can stop it.

The Lasso Security pricing guide explains why module scope belongs in the commercial comparison as well. A replacement can look cheaper because it covers fewer routes.

Noma Security fits an existing-infrastructure strategy

Noma Security's platform presents agent runtime security and MCP security. It also presents agentic identity and AI asset discovery, plus an agent control plane. Noma says it enforces through existing gateways and agent hooks across the AI stack instead of requiring a new gateway. That operating model deserves a direct test against the buyer's deployed gateways and hooks.

Choose Noma when the primary requirement starts with discovering agents and tying their access to an identity and policy program. Ask the vendor to demonstrate a cloud agent's integration point first. Repeat the test for SaaS and endpoint agents, then remove one dependency and observe the failure posture.

This option differs from a dedicated request proxy. Existing-infrastructure integration can reduce another data-plane component, but the team must prove that each relevant route reaches an enforceable hook. A diagram showing an integration is weaker than a denied request captured during a controlled test.

Harmonic and Prompt Security own browser and endpoint activity

Harmonic Security's pricing page separates packages that cover discovery and endpoint activity. Other packages cover inline coaching and agent controls. Its visible scope includes desktop applications and IDEs. It also includes copilots and MCP client or server discovery. That makes Harmonic a practical candidate when employee AI usage and local agent activity sit at the center of the buying decision.

Prompt Security's article on browser and endpoint sensors states the boundary plainly. On-device prompts and local MCP activity can leave nothing useful for a network proxy to inspect. Browser or endpoint instrumentation can observe those interactions where they occur. That is the right category for a local coding assistant calling tools without sending the relevant exchange through a managed enterprise LLM gateway.

The operational trade is endpoint reach. Security must validate supported browsers and desktop applications. It must also validate device ownership states and sensor health, along with update handling and tamper resistance. A laptop with an extension inventory open beside an EDR console provides the concrete review surface. The buyer should trigger one blocked browser upload and one local-agent tool call, then confirm which sensor produced each event.

The shadow AI guide covers the employee-use problem in more detail. Keep that route separate from backend model traffic during procurement.

agentgateway fits teams willing to operate the gateway

agentgateway documentation describes an open-source data plane for agent connectivity, including MCP and agent-to-agent protocols, with routing and policy plus observability features. It belongs on the shortlist when platform engineering wants inspectable software and accepts responsibility for deployment and upgrades.

The open-source route changes the commercial question rather than removing cost. The team still owns capacity and availability; configuration; certificate and secret handling; telemetry retention and upgrades; incident response; and any enterprise support agreement. Test JWT handling and MCP authorization against the intended topology. Force an upstream timeout during the test, then remove a required policy dependency. The gateway's response under failure matters more than a feature name on its documentation page.

agentgateway is also a protocol boundary. Local activity that bypasses the data plane is assigned to endpoint controls, and unknown AI assets are assigned to discovery tooling. The best MCP security tools guide separates gateways from scanners and registries.

Identity-bound HTTP LLM policy

DeepInspect governs authenticated HTTP traffic deliberately routed between users or agents and LLM endpoints. The application supplies identity and role context. DeepInspect evaluates that context with the destination and prompt classification under a versioned policy, then records the permit or deny decision and any redaction before allowed traffic reaches the model.

Choose this boundary when the acceptance test asks which authenticated person or agent was allowed to send a specific data class to a particular model route. The record should include the supplied identity and policy version; classification and destination; and outcome and time. The calling application should lack custody of the record's write path.

DeepInspect leaves browser-only sessions and local model execution to other controls. It also leaves STDIO tool calls and endpoint compromise to those controls. It leaves AI asset discovery and red-team testing to products designed for those jobs. The AI firewall, gateway, and proxy comparison shows why placement determines what a control can see.

DeepInspect

DeepInspect owns one precise boundary: authenticated HTTP requests deliberately routed to LLM endpoints. It applies identity-aware policy before forwarding allowed traffic and creates an independent record for each decision. Agent gateways are still appropriate for theirs.

Map the four arrows first, then test each control on its actual path. Book a technical deep dive at deepinspect.ai.