Every software company now has an "AI agent." Give it a month and the coffee maker will too. Most owners I talk to have stopped asking whether AI is real. They ask something simpler: which one should we actually use?
Here's the short answer: start with the one that lives where your work already lives. We're not paid by any company named here, and these products change fast, so check the date at the bottom.
At a glance
| Tool | Best for | Where it works | A good first job |
|---|---|---|---|
| ChatGPT | Teams already using it | Its own app, connected to your tools | A weekly research summary |
| Claude | Writing and long documents | Its own app; Duet preview watches Gmail and Calendar | Drafting proposals and replies |
| Gemini | Google Workspace businesses | Gmail, Docs, Sheets, Calendar | Summarizing long email threads |
| Microsoft 365 Copilot | Microsoft businesses | Outlook, Word, Excel, Teams | Meeting notes and follow-ups |
| Grok | Hands-off, multi-app work | Its own cloud computer, logged into your apps | A low-stakes multi-step task |
| Zapier Agents | Apps that don't talk to each other | Thousands of connected apps | Sorting and routing new leads |
| Lindy | Owner and small-team admin | Email, text and calendar | Scheduling and inbox cleanup |
| Make / n8n | A technical team member, high volume | Visual workflow builders | One repeat, multi-step process |
| QuickBooks, HubSpot, Salesforce | Anyone already paying for them | Inside that software | Payment reminders and customer follow-ups |
| Meta Muse | Customers who find you on Facebook and Instagram | Your page, Instagram and ad account | Drafting posts and ad ideas |
| Custom-built agent (like ours) | Businesses with their own rules the standard tools can't follow | Inside the tools you already use, built around how you work | The one process nothing off the shelf handles well |
First, what's an "agent"?
A regular AI assistant answers when you ask. An agent goes a step further: it can take actions across your apps, run on a schedule, or check in with you first. Think of it as the difference between an employee who answers questions and one who actually does the thing. The good ones ask before they do anything that matters, just like a good new hire.
The big assistants
ChatGPT (OpenAI). The one most people have already tried, usually to write a birthday poem first. On the Business plan, teams can build agents that run recurring tasks on their own, like a weekly summary or a research job. Pick something else when: your day runs inside Microsoft or Google apps and you'd rather not switch windows.
Claude (Anthropic). Strong at writing, careful reasoning and long documents. Anthropic is previewing Claude Duet, an agent that watches your inbox and calendar, sends a morning brief, and drafts replies for your approval. Right now it's a waitlist preview for individual paid plans in the US. Pick something else when: you need it built into the apps your team uses all day.
Gemini (Google). Built into Gmail, Docs, Sheets and Calendar for businesses on Google Workspace. Google announced a broader Gemini agent for work in October and is rolling it out. Pick something else when: your company runs on Outlook and Teams.
Microsoft 365 Copilot. Works inside Outlook, Word, Excel and Teams, and Copilot Studio lets you build simple agents without code. Pick something else when: you're on Google, or only one or two people would use it.
Grok (xAI). Grok Bot, launched in August, is a set of agents that log into your business apps, like Google Workspace, Microsoft 365, Slack and Salesforce, and work on their own cloud computer. Several can work at once, like a small crew, and they pause for your approval before sending, buying or deleting anything. It comes with Grok Business seats. Pick something else when: you want the most established option. Grok Bot is the newest one here, so start it on low-stakes jobs.
The connectors: getting apps to work together
Zapier Agents. Zapier connects thousands of apps, and its agents add judgment on top: qualify a new lead, prep for a meeting, route a support request.
Lindy. A personal AI assistant you text or email. It handles inbox, scheduling and meeting follow-up, and it never asks for Friday off.
Make and n8n. Visual builders for multi-step workflows. n8n can run on your own server.
The agents already in your software
Often overlooked, and often the best place to start. You may already be paying for an agent that's been sitting in the back room waiting for someone to say hello.
QuickBooks has added agents that help categorize transactions and send payment reminders on overdue invoices. HubSpot and Salesforce have added agents that work on the customer records you already keep there.
Best for: anyone already paying for these. Turn on what's included and check its work before buying something new.
Meta Muse. If your customers find you on Facebook and Instagram, Meta's Muse for small business is worth a look. It connects to your Facebook page, Instagram account and ad account, plus tools like Shopify, QuickBooks and Canva. It learns what you sell and how your brand sounds, then helps with marketing and finding new customers. Pick something else when: social media isn't where your customers come from. It's new, so read what it drafts before anything goes out under your name.
How to choose, in four questions
- Where does your team spend the day? Google, Microsoft, or a mix? Start there.
- What's the job? Inbox and scheduling, follow-ups, connecting apps, or bookkeeping?
- Does it ask before acting? For anything that sends a message, moves money or changes a record, it should.
- Where does your data go? Business plans generally give you more control over how your data is used than free personal accounts. Check before you paste in anything sensitive.
A few best practices
- One job at a time. Pick one task, get it working, then add the next.
- Keep a person in the loop. Let the agent draft; let your team approve.
- Use business accounts, not personal ones. That's where the admin controls and data settings are.
- Name an owner. Every agent needs someone on your team who checks on it. "Everyone" is not an owner.
When it makes sense to build your own
Off-the-shelf agents are built to work the way most businesses work. If yours runs on its own rules, like who gets which lead, how a job gets priced, or which customers get a call instead of an email, a custom agent can be built to work the way you do.
We did this ourselves. Our team built LDT's own agent, Atara. She handles our email, books evaluations on our calendar and sends a morning brief of what needs attention, all following our rules because she was built around them. When we build one for a client, it's built and owned by LDT, and we'll tell you plainly whether our own or an off-the-shelf tool is the better fit. For many smaller businesses, setting up something you already pay for is the right first step.
Where to start
Over the next few weeks, we'll go industry by industry: contractors, medical and dental offices, accounting and law firms, real estate, restaurants and more.
If you'd rather not sort through it alone, that's what our team at LDT Advisors does in every evaluation: we look at what you already pay for, what it can do that you haven't turned on, and where an agent would earn its place. The first 30-minute evaluation is free, and you'll walk away with a clearer picture whether you work with us or not.
Product details checked November 2, 2026.