AI-powered marketing tools

Grow your business without the marketing overwhelm

Openfield gives small business owners ready-to-use AI prompts, templates, and tools — so you can show up online consistently without the stress.

New tools every week. Free to start. Cancel any time.

Caption generator prompt

Write 3 captions for an [Instagram] post about [my new product launch]. Tone: [friendly]. Goal: [drive engagement].

AI output — Option 1

Something new just dropped — and we think you're going to love it. Tap the link in bio to be first in line. ✨

AI output — Option 2

We've been working on something behind the scenes. Today's the day we share it. What do you think? 👇

How it works

Simple as copy, paste, done.

No learning curve. No complicated tools. Just open a prompt, fill in your details, and let AI write the marketing for you.

01

Pick your prompt

Choose from our library of tested AI prompts built specifically for small businesses.

02

Fill in the blanks

Swap the bracketed placeholders for your brand, product, and audience.

03

Publish with ease

Paste into ChatGPT, Claude, or Gemini and get content you're proud to post.

What's included

Everything you need to market your business.

Five ready-to-use tools in every issue, with new ones added every month.

✍️

Caption generator

Write 3 scroll-stopping captions tailored to any platform in seconds.

#️⃣

Hashtag strategy

Get a complete hashtag set — broad reach and niche gems — for any topic.

📅

Content calendar

Plan a full week or month of posts in minutes with one simple prompt.

👤

Bio writer

Three polished bio options for every platform, fitted to your brand voice.

📊

Post analyzer

Get an engagement score and actionable feedback before you hit publish.

🔄

New tools monthly

Fresh prompt packs and templates dropped every month for paid subscribers.

Pricing

Start free. Upgrade when you're ready.

No long-term commitment. Cancel any time.

Free
$0/mo

Great for getting a feel for what Openfield can do.

  • Weekly marketing tips
  • Sample prompts every issue
  • AI marketing news & insights
About

Marketing should feel effortless.

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Openfield was built for small business owners who are great at what they do — but don't have hours to spend figuring out what to post every week.

We believe that with the right tools, marketing doesn't have to feel like a second full-time job. That's why everything we create is designed to be simple, practical, and ready to use the same day you get it.

Right now, Openfield is a weekly Substack delivering AI prompt packs, templates, and tools straight to your inbox. No tech knowledge required. No complicated setup. Just open, fill in the blanks, and go.

Works with ChatGPT, Claude, Gemini, Copilot, or any other AI assistant — whatever you already use.

As we grow, Openfield will grow with you — expanding into a full one-stop marketing shop for small businesses. If you're here now, you're here early, and that means something.

Glad you found us.

What we believe

Keep it simple

No jargon, no complexity. If it isn't easy to use on a busy Tuesday morning, it isn't ready to ship.

Built for real people

Every tool is made with the overwhelmed small business owner in mind — not the marketing professional.

Always growing

We add new tools every month based on what our community actually needs. You shape what we build.

Services

Tools that do the work for you.

Every tool in Openfield is built around one idea — making marketing feel as easy as possible for small business owners.

01

Caption generator

Three platform-native captions ready to post. Describe your content, choose your tone, and get options tailored to Instagram, LinkedIn, TikTok, Facebook, or Twitter/X.

02

Hashtag generator

A full strategic hashtag set built for your niche — a ready-to-copy pack, five broad reach tags for discovery, and five niche gems for targeted engagement.

03

Content calendar builder

A complete posting schedule with content types, post topics, and optimal timing for every platform. Plan a full week or month in under five minutes.

04

Profile bio writer

Three bio options for any platform, each fitted to the character limit and native feel of Instagram, TikTok, LinkedIn, or Twitter/X. Your brand voice, your words.

05

Post performance analyzer

Paste any caption and get an engagement score, three specific strengths, three improvements, audience alignment notes, and the single most impactful change to make.

06

Monthly prompt packs

Paid subscribers get a fresh full prompt pack every month — seasonal campaigns, trending content formats, and platform-specific tools as social media evolves.

On the roadmap

We're just getting started.

Openfield is growing into a full-service marketing resource for small businesses. Here's what's coming next.

Coming soon

Email marketing prompts

Newsletters, welcome sequences, and promotions — done with AI.

Coming soon

Ad copy toolkit

Ready-to-run copy for Facebook, Instagram, and Google ads.

Coming soon

Subscriber community

A space to share results, get feedback, and grow together.

Contact

We'd love to hear from you.

Have a question about a prompt, want a custom tool for your brand, or just want to say hi? Reach out any time — we typically respond within one business day.

Quick answers.

What AI tools do the prompts work with?

Every prompt works with ChatGPT, Claude, Google Gemini, Microsoft Copilot, or any other AI assistant. No special setup needed.

How often is new content published?

Free issues go out weekly. Paid prompt packs drop monthly, with bonus tools added throughout the month.

Can I cancel my subscription?

Yes, any time. No contracts, no questions asked. You keep access until the end of your billing period.

I'm not tech-savvy. Will this work for me?

Absolutely — that's exactly who Openfield is built for. If you can copy and paste, you can use every tool we make.

Do I need to know how to use AI already?

No prior experience needed. Every prompt comes with a variable table explaining exactly what to fill in and an example to follow.

Caption Generator

Describe your post, pick a platform and tone, and get three ready-to-use captions in seconds.

✍️   Your captions will appear here

Bio Writer

Get three polished bio options tailored to your platform's character limit and your brand voice.

👤   Your bio options will appear here

Hashtag Generator

Build a complete strategic hashtag set — broad reach tags, niche gems, and a ready-to-copy pack.

🔒

This tool is for paid subscribers

Upgrade to Openfield Pro for $7/month to unlock the Hashtag Generator plus the Content Calendar, Post Analyzer, and new tools every month.

Content Calendar Builder

Plan a full week or month of posts with content types, topics, and optimal posting times.

🔒

This tool is for paid subscribers

Upgrade to Openfield Pro for $7/month to unlock the Content Calendar Builder plus the Hashtag Generator, Post Analyzer, and new tools every month.

Post Performance Analyzer

Paste any post and get an engagement score, three strengths, three improvements, and a top priority tip.

🔒

This tool is for paid subscribers

Upgrade to Openfield Pro for $7/month to unlock the Post Analyzer plus the Hashtag Generator, Content Calendar, and new tools every month.