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ARCESSO

AI development

AI Agent Development Company

Arcesso builds production AI agents for startups and mid-market teams, typically in 2 to 8 weeks. We start with a fixed-price pilot on one workflow, measure the result against your baseline, then scale what works. Every agent ships with evals, logging and a human approval step. US-based team, US business hours, and you own the code.

From $11,500 fixed· 5–10% below the comparable market price ·see the price list

Updated · By Tanner DeJean, Founder

Key facts

FactValue
Price2-week AI agent pilot (one workflow): From $11,500 fixed · Production AI agent (after the pilot): $22,500–$85,000
Typical timeline2-week pilot on one workflow; production agents in 2 to 8 weeks
Engagement modelFixed-price pilot, then a fixed-price build or a monthly retainer
TeamA senior engineer leads a small team; you talk to engineers, not sales reps
StackOpenAI, Anthropic Claude, Google Gemini, open-weight models; Python, Node, Postgres; MCP
OwnershipYou own 100% of the code, prompts and evals from the first commit, in writing
Data policyData flows documented per project; mutual NDA within 24 hours of asking
KickoffWithin 14 days of signing

What is included

  • Customer-support agents

    Agents that read a ticket, look up the order or account, draft the reply and resolve or escalate, with a person approving until the evals say otherwise.

  • Internal operations agents

    Triage, scheduling and data entry agents that move work between your inbox, CRM, calendar and spreadsheets without copy and paste.

  • Document and invoice extraction agents

    Agents that pull fields from PDFs, invoices and forms, check them against your records and flag anything that does not match.

  • Multi-agent workflows with tool use and MCP

    Several focused agents that call your APIs and tools through Model Context Protocol (MCP) servers we build and you own.

  • Agent evals, monitoring and guardrails

    Test sets, scoring, cost tracking and alerts for agents you already run, built by us or by another team.

$120,595

Average AI development project size across agencies reviewed on Clutch

Source: Clutch, AI development pricing

$11,553/mo

Average monthly spend on AI development projects, the highest of any Clutch service line

Source: Clutch, AI development pricing

+199%

Growth in US search share for "AI agent development" vs custom software development, Oct 2025 to Oct 2026

Source: Google Trends, anchored comparison (Arcesso research)

46.3% CAGR

Projected AI agents market growth, from $7.84B in 2025 to $52.62B by 2030

Source: MarketsandMarkets

What an AI agent does for your business

An AI agent is software that reads a request, decides what to do and takes action in your systems. A support agent can read an email, check the order in your database, draft a reply and update the ticket. An operations agent can sort incoming invoices, match them to purchase orders and queue them for payment.

The difference from a script is judgment. A script follows fixed rules and breaks when the input changes. An agent uses a large language model to handle messy input, then calls tools you approve to do the work. Arcesso limits each agent to the tools and data it needs, and nothing else.

We start with one workflow that has a clear baseline, such as minutes per ticket or invoices processed per day. That baseline is how you judge the pilot. If the numbers do not move, you know in two weeks, not six months.

AI agent vs chatbot vs automation

A chatbot answers questions, an automation follows rules and an AI agent takes actions with judgment. Most businesses need a mix. Arcesso builds all three and will tell you when a plain automation is simpler and safer than an agent.

Use the table below to match the tool to the job. If your process never changes and the inputs are clean, start with an automation. If people mostly need answers from your documents, a chatbot is enough. Choose an agent when the work needs reading, deciding and acting across several systems.

Many projects combine them. A common pattern is an n8n automation that collects the data, an agent that makes the judgment call, and a chatbot that answers customer questions about the result. We design the handoffs between them so a person can step in at any point.

Rule-based automationAI chatbotAI agent
What it doesMoves data on fixed rulesAnswers questions from your contentReads, decides and acts in your systems
Handles messy inputNoYes, for questionsYes, for tasks
Takes actionsYes, fixed onesRarely, usually hands offYes, through approved tools
Typical build time1 to 2 weeks3 to 5 weeks2 to 8 weeks
Main riskBreaks when inputs changeWrong answersWrong actions, so it needs approval steps

What AI agent development costs

AI agent cost depends on how many systems the agent touches, how much data it reads and how many approval steps it needs. A single-workflow agent with two integrations costs far less than a multi-agent system across your CRM, billing and support tools.

For an outside benchmark, Clutch reports the average AI project at about $120,595 across reviewed agencies, with average monthly spend of about $11,553. Many agent pilots are much smaller than that average.

Arcesso publishes its prices: a two-week pilot on one workflow is a fixed price from $11,500, and production agents run $22,500 to $85,000, set 5–10% below the comparable US market figures shown on our pricing page. The scoping fee is credited in full to the build. Running costs matter too, so every estimate shows expected model and hosting costs per month, not just the build. See the pricing page for engagement models and our AI agent cost guide for a line-by-line breakdown.

How we keep agents safe in production

Arcesso ships every agent with evals, logging and a human approval step from day one. Evals are test sets of real examples with expected outcomes. We write them before we write prompts, so we can prove the agent works and catch it when a model update changes behavior.

  • Human in the loop: a person approves actions until the eval scores show the agent is safe to run alone for that task.
  • Least privilege: each agent gets only the tools, accounts and data it needs, with read-only access where possible.
  • Full logs: every input, tool call and output is recorded so you can audit any decision.
  • Cost and rate limits: spending caps and alerts stop a loop from running up your model bill.
  • Fallbacks: if a model provider is down or unsure, the agent hands off to a person instead of guessing.

MCP servers and tool integrations for your agents

Model Context Protocol (MCP) is an open standard that lets AI models call your tools and data in a consistent way. Arcesso builds MCP servers that expose the right parts of your systems, such as order lookup, ticket updates or calendar booking, to agents built on Claude, OpenAI or other models.

One MCP server can serve several agents and several model providers, so you are not locked into one vendor. We add authentication, input checks and logging to every tool, because an agent is only as safe as the tools it can call.

We also connect agents through regular APIs, webhooks and workflow tools like n8n and Make when that is simpler. The goal is the shortest safe path between the model and the work, in your accounts and your repositories.

When Arcesso is not the right choice for an AI agent

Arcesso is not the right partner if you need a large enterprise program with dozens of agents, a 24/7 operations center and a procurement process measured in quarters. Larger firms are set up for that, and we will say so on the first call.

We are also the wrong fit if the workflow has no clear owner or no way to measure success. An agent without a baseline turns into a demo that never ships. In that case, start with our AI readiness assessment to pick the right first use case.

Arcesso is a good fit for startups and mid-market companies that want one agent live in weeks, built by senior engineers who answer within one business day. You work with a US company that has offices in Jacksonville, Florida and Arlington, Texas, and you keep the code, prompts and evals.

How we deliver ai agent development

  1. 1

    Discovery call

    30 minutes, free

    You talk to an engineer about the workflow, the systems involved and what success looks like. If an agent is the wrong tool, we say so.

    Deliverable: Fit decision and a ballpark range within 3 business days

  2. 2

    Scope and fixed price

    1 week

    We map the workflow, the data, the tools the agent needs and the risks, then agree the baseline metric for the pilot.

    Deliverable: Scope document, eval plan, fixed quote and risk list

  3. 3

    Pilot build

    2 weeks

    We build the agent against real examples, with evals written first and a human approval step on every action. You see a demo every week.

    Deliverable: Working pilot, eval report and shared repository you own

  4. 4

    Launch in your accounts

    1 week

    We deploy to your cloud and model accounts with monitoring, logging and cost alerts on, then train your team on the handover call.

    Deliverable: Production release, runbook and handover recording

  5. 5

    Measure and scale

    Ongoing, optional retainer

    We compare results against the baseline, fix what misses, and add workflows or loosen approval steps only where the evals support it.

    Deliverable: Results report and a ranked list of next workflows

FAQ

Questions buyers ask us

How much does it cost to build an AI agent?

An Arcesso AI agent pilot is a fixed price from $11,500 for two weeks on one workflow, and production agents run $22,500 to $85,000 depending on integrations, data volume and approval steps. For reference, Clutch reports the average AI project at about $120,595 across reviewed agencies. A single-workflow pilot is usually far smaller, and every estimate includes expected monthly model and hosting costs.

How long does AI agent development take?

A first Arcesso agent pilot usually takes two weeks after a one-week scope, and production agents typically take 2 to 8 weeks. Timing depends on how many systems the agent touches and how much test data exists. Kickoff happens within 14 days of signing, and you see a working demo every week.

What is the difference between an AI agent and a chatbot?

A chatbot answers questions, while an AI agent takes actions in your systems. A chatbot grounded in your documents resolves support questions. An agent reads an email, checks the CRM, drafts the reply and books the follow-up, with a person approving each step until the evals show the task is safe to automate.

Which AI models do you build agents on?

Arcesso builds agents on OpenAI, Anthropic Claude, Google Gemini and open-weight models, and picks per task using evals rather than habit. Many agents use two models: a stronger one for hard decisions and a faster, less expensive one for routine steps. MCP servers and fallback design mean you can switch providers without rebuilding the agent.

How do you stop an AI agent from making costly mistakes?

Arcesso limits each agent to approved tools, logs every action and keeps a human approval step until eval scores prove the task is safe. Spending caps stop runaway model costs. When the agent is unsure or a provider fails, the agent hands the task to a person. You can review any decision in the logs.

Who owns the AI agent, prompts and code?

You own 100% of the code, prompts, evals and documentation from the first commit, and the assignment is written into the contract. Arcesso works in your repositories and your cloud and model accounts, so there is nothing to hand back at the end of the project.

Is our data used to train AI models?

Arcesso sets up model accounts with no-training settings where the vendor offers them and documents which data goes to which provider in your project. Personal data is masked before model calls where the workflow allows it. A mutual NDA can be in place within 24 hours of asking, before any detailed discussion.

Tell us what you need. An engineer replies within one business day.

Three fields to start. Book a 30-minute call on the same screen, or ask for a mutual NDA first.

Reply within one business day · mutual NDA within 24 hours · ballpark estimate within 3 business days