AI Agent Development

AI Agent Development Company

We build AI agents that reason, take actions, and complete real work—wired to your data and systems, hardened against prompt injection, and shipped with an evaluation harness so you measure task success, not demos.

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NDA on request · Senior AI engineer on the first call · Cost controls designed in from day one

AI Agent Development Company — Marshall Infotechs

Evals

Task-success measured before production

RAG · Tools

Grounded agents with human approvals

$15K–$400K+

Honest agent build range

Cost controls

Designed in from day one

Where founders get stuck

Real concerns, answered before you commit

Our last AI pilot demoed great but never made it to production.

We build an evaluation harness on your real inputs and measure task-success rate before launch, so an agent ships only when it reliably does the job—not just when it looks impressive in a demo.

I'm worried the agent will do something it shouldn't.

We scope agents narrowly, add approval steps and guardrails for high-risk actions, and harden against prompt injection so the agent acts inside clear, auditable boundaries.

AI costs feel unpredictable and could spiral.

We design model routing, prompt caching, and per-task token budgets from day one and report Cost Per Success, so your bill tracks value delivered instead of runaway token usage.

Our data and tools are messy—will an agent even work here?

We start with a data and integration audit, since 70% of the work is connecting the model reliably to your systems. We fix the data and tool layer first, then build the reasoning loop on top.

I don't know if I need a simple agent or a multi-agent system.

We right-size the architecture to the job—a single-task agent when one loop suffices, multi-agent orchestration only when distinct roles and tools genuinely require it—so you don't overpay for complexity you won't use.

What we build

What we build into a production agent

Action-taking agents

Agents that go beyond answering—executing multi-step tasks like processing refunds, querying systems, and updating records through tools and integrations toward a defined goal.

RAG & knowledge grounding

Retrieval-augmented generation over your documents and data so answers and actions are grounded in your specific, current knowledge instead of the model's training alone.

Tool & system integration

Reliable connections to your databases, APIs, internal tools, and document stores—the integration and data-readiness layer where most of the real engineering lives.

Multi-agent orchestration

Hierarchical and collaborating agents with clear roles, handoffs, and shared memory for workflows too complex for a single reasoning loop.

Evaluation harness

Automated evals on real inputs that measure task-success rate, regressions, and edge cases—your pre-production gate against unreliable behavior.

Security & cost controls

Prompt-injection hardening, action guardrails, model routing, caching, and per-task token budgets so the agent stays safe and economical at scale.

How we deliver

A clear, milestone-based delivery process

01

Scope & feasibility

We define a narrow, high-value task and a clear success metric, then sanity-check that an agent—rather than a simpler workflow—is the right tool for it.

02

Data & integration audit

We map the data, APIs, and tools the agent must touch and assess readiness, because integration and data quality drive most of the cost and timeline.

03

Model & architecture selection

We choose the LLM and agent architecture—single-task, task-execution, or multi-agent—matched to accuracy, latency, and budget targets.

04

Build the reasoning & tool loop

We implement the core reason-act loop, RAG retrieval, and tool calls, with prompt-injection hardening and guardrails on sensitive actions.

05

Evaluate on real inputs

We build an evaluation harness on real cases and tune until task-success rate clears your bar—not just a handful of cherry-picked demos.

06

Deploy with cost controls

We ship with model routing, caching, per-task token budgets, and observability so you can track Cost Per Success and scale predictably.

Pricing & timelines

AI agent development cost (2026)

Indicative ranges blended from current market data. Your fixed-scope quote is set after a short discovery call.

Single-task agent

$15K–$40K

2–6 weeks

A narrow agent automating one well-defined task or a RAG assistant answering from a clean knowledge base—the fastest way to prove value.

Best for: Validating one workflow before scaling.

Most popular

Conversational / task-execution MVP

$25K–$80K

4–10 weeks

An agent that takes real actions across your tools and data, with RAG, guardrails, and an evaluation harness for production reliability.

Best for: Teams ready to put an agent in front of users.

Multi-agent system

$80K–$250K

10–20 weeks

Orchestrated agents with distinct roles, shared memory, and complex tool use for workflows a single agent can't handle.

Best for: Complex, multi-step operations across systems.

Enterprise / hierarchical platform

$200K–$400K+

4–12 months

A governed, scalable agent platform with deep integrations, role-based access, monitoring, and change-management support.

Best for: Organizations rolling agents out at scale.

The 2026 average agent project lands around $47,000. Most spend goes to data, integration, and testing—not the model. Ongoing LLM, hosting, and vector costs can exceed build cost within 18–24 months, so we design cost controls in from day one. Final pricing is fixed after a scoping and data audit.

Models, retrieval & tooling

  • Frontier LLMs (GPT, Claude, Gemini)
  • Open-weight models (Llama, Mistral)
  • Agent frameworks (LangGraph, etc.)
  • RAG pipelines
  • Vector databases (pgvector, Pinecone)
  • Evaluation harnesses
  • Tool/function calling & API integration
  • Model routing & prompt caching
  • LLM observability & tracing

Why teams choose Marshall

Evals before production, always

We measure task-success rate on real inputs and only ship when the agent reliably does the work—avoiding the demo-to-dead-pilot trap that sinks 40%+ of agentic projects.

Cost engineered in, not bolted on

Model routing, caching, and per-task token budgets are part of the architecture, so operating costs stay tied to value and don't quietly overtake your build budget.

We fix the data layer first

Since 70% of agent work is data and integration, we treat the data and tool layer as the project—not an afterthought—so the model has something reliable to act on.

AI + Web3 fluency

We build agents that interact with smart contracts, on-chain analytics, and tokenized-asset workflows—an AI-native edge over generic shops and generic Web3 shops alike.

Proof

Representative outcomes

AI · India

Ops Agent Platform

Eval-gated production agents

Multi-agent workflow with RAG, tool calling, eval harness, and human approval gates.

“Evals before production meant we knew task-success rates before go-live — not after customer complaints.”

Priya S.IndiaHead of Product, B2B SaaS operatorBengaluru, India

FAQ

AI agent development FAQs

How much does it cost to build an AI agent in 2026?

A simple single-task agent costs $15,000–$40,000, a conversational MVP $25,000–$80,000, a multi-agent system $80,000–$250,000, and an enterprise or hierarchical agent $200,000–$400,000+. The 2026 average project is around $47,000.

What is an AI agent?

An AI agent is software that uses a large language model to reason, make decisions, and take actions through tools and integrations—not just answer questions. Unlike a basic chatbot, an agent can execute multi-step tasks such as processing a refund, querying systems, or updating records toward a goal.

How do you build an AI agent?

The standard process is to define a narrow scope, audit data and integrations, select the LLM and architecture, build the core reasoning and tool loop, harden security against prompt injection, build an evaluation harness on real inputs, then deploy with cost controls. Most of the spend goes to data and integration, not the model.

Why does most of the cost go to data and integration, not the model?

By the 10-20-70 rule, roughly 10% of effort is model work, 20% is infrastructure, and 70% is data pipelines, integrations, testing, and change management. The model is largely a commodity; the value and cost are in connecting it reliably to your systems and data.

What are the ongoing costs of running an AI agent?

Expect LLM API fees of about $300–$5,000 per month per roughly 10,000 queries, hosting of $50–$500, vector storage of $0–$1,000, plus observability tooling. Operating costs can exceed build cost within 18–24 months, so model routing, caching, and per-task token budgets matter from day one.

How long does it take to build an AI agent?

A simple agent takes 2–6 weeks, a task-execution agent 4–10 weeks, a multi-agent system 10–20 weeks, and an enterprise platform 4–12 months. Integration complexity and approval cycles, not model training, drive most of the timeline.

Can I build an AI agent for under $10,000?

Yes, if it's a narrow conversational or RAG agent answering questions from a well-organized knowledge base. Once you need the agent to take actions rather than just answer, expect to cross the roughly $25,000 threshold.

Why do AI agent projects fail?

Gartner warns that more than 40% of agentic AI projects risk cancellation by 2027, usually from weak governance, unclear value, poor data quality, and insufficient pre-production evaluation. Success comes from a narrow scope, clean data, and measuring real task-success rate rather than demos.

How do I keep AI running costs under control?

Use model routing to send simple tasks to cheaper models, apply prompt caching, set per-task token budgets, and measure Cost Per Success rather than per-token price. Designing these in from day one is the biggest lever on long-term cost.

Can AI agents integrate with my existing software?

Yes. Agents connect to databases, APIs, internal tools, and document stores. The integration and data-readiness work is the bulk of the project, which is why a data and integration audit is the critical early step before building.

What is a multi-agent system and when do I need one?

A multi-agent system splits work across several specialized agents that coordinate through defined roles, handoffs, and shared memory. You need one when a workflow has distinct sub-tasks or tools that a single reasoning loop handles poorly; for narrower jobs a single-task agent is faster and cheaper.

How do you stop an agent from doing something harmful?

We scope agents narrowly, add approval steps and guardrails for high-risk actions, harden against prompt injection, and constrain which tools an agent can call. Combined with an evaluation harness and observability, this keeps actions inside clear, auditable boundaries.

Can you combine AI agents with blockchain?

Yes. Use cases include AI risk scoring and due diligence for tokenized assets, AI-based KYC and AML screening, on-chain analytics, and agents that interact with smart contracts. This AI-native angle is a key differentiator versus generic Web3 shops.

Last updated: June 2026

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